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1151 Commits

Author SHA1 Message Date
Alex Lam S.L
274331d0ea transform String.charAt() to index access (#1620) 
Guarded by `unsafe` as `charAt()` can be overridden.
 2017-03-19 02:17:15 +08:00
Alex Lam S.L
ac40301813 fix chained evaluation (#1610) 
`reduce_vars` enables substitution of variables but did not clone the value's `AST_Node`.

This confuses `collapse_vars` and result in invalid AST and subsequent crash.

fixes #1609
 2017-03-17 00:26:48 +08:00
Alex Lam S.L
5ae04b3545 make collapse_vars consistent with toplevel (#1608) 
fixes #1605
 2017-03-16 13:22:26 +08:00
Alex Lam S.L
a80b228d8b fix hoist_vars on reduce_vars (#1607) 
`hoist_vars` converts variable declarations into plain assignments, which then confuses `reduce_vars`

fixes #1606
 2017-03-16 12:03:30 +08:00
Alex Lam S.L
cf4bf4ceb1 fix stack issues with AST_Node.evaluate() (#1603) 
As patched in #1597, `make_node_from_constant()` makes inconsistent and sometimes incorrect calls to `optimize()` and `transform()`.

Fix those issues properly by changing the semantics of `evaluate()` and `make_node_from_constant()`, with the side effect that `evaluate()` no longer eagerly converts constant to `AST_Node`.
 2017-03-16 01:02:59 +08:00
Alex Lam S.L
8223b2e0db fix AST_Node.optimize() (#1602) 
Liberal use of `Compressor.transform()` and `AST_Node.optimize()` presents an issue for look-up operations like `TreeWalker.in_boolean_context()` and `TreeWalker.parent()`.

This is an incremental fix such that `AST_Node.optimize()` would now contain the correct stack information when called correctly.
 2017-03-15 18:44:13 +08:00
Alex Lam S.L
381bd3836e minor clean-ups (#1600) 
- remove obsolete optimisation in `AST_Binary` after #1477
- improve `TreeWalker.has_directive()` readability and resilience against multiple visits
 2017-03-14 13:19:05 +08:00
Alex Lam S.L
e3a3db73ae temporary fix for boolean bug (#1597) 
fixes #1592
 2017-03-11 04:59:55 +08:00
Alex Lam S.L
d9344f30b8 disallow parameter substitution for named IIFEs (#1596) 
Self-referenced function has non-fixed values assigned to its parameters.

Let `unused` & `!keep_fnames` do the scanning, then apply `reduce_vars` only to unnamed functions.

fixes #1595
 2017-03-11 03:34:55 +08:00
Alex Lam S.L
cf45e2f79b fixup for #1585 (#1589) 
As patched on `harmony`, `statement()` is the only user of `embed_tokens()` with a missing error branch.

Updated test case and match up with `harmony` to facilitate future merging.
 2017-03-10 10:49:41 +08:00
Alex Lam S.L
9e6b128374 fix catch variable reference in IE8 (#1587) 
`AST_Scope.def_variable()` will overwrite `AST_Symbol.thedef`, so save a copy before calling.

fixes #1586
 2017-03-10 03:15:21 +08:00
Michael Mior
93cdb194f4 Correctly raise a parse exception with a missing loop body (#1585) 2017-03-10 03:08:43 +08:00
Alex Lam S.L
b633706ce4 fix & improve function argument compression (#1584) 
- one-use function call => IIFE should take `eval()` & `arguments` into account
- if unused parameter cannot be eliminated, replace it with `0`

fixes #1583
 2017-03-09 19:11:05 +08:00
Alex Lam S.L
7e465d4a01 scan RHS of dropped assignments (#1581) 
- similar case as #1578 but against #1450 instead
- fix `this` binding in #1450 as well

closes #1580
 2017-03-09 05:22:27 +08:00
Alex Lam S.L
711f88dcb4 scan assignment value in drop_unused() (#1578) 
those were not optimised for `unused` before, which made it necessary for `reduce_vars` to have separate steps for `keep_fnames`

docs update by @kzc

closes #1577
 2017-03-08 18:37:32 +08:00
Alex Lam S.L
c7cdcf06a6 fix function name eliminiation (#1576) 
Function expression can be assigned to a variable and be given a name. Ensure function name is the reduced variable before clearing it out.

fixes #1573
fixes #1575
 2017-03-08 12:39:57 +08:00
Alex Lam S.L
dedbeeff15 plan B for IE8 do-while semi-colon fix (#1572) 
- omitting trailing semi-colon in do-while breaks non-browser parser, e.g. uglify-js 1.x
- trailing semi-colon only breaks IE8 if followed by `else` or `while`
- always use braces in do-while body to workaround 2nd case with no size loss in compression

fixes #1568
 2017-03-08 05:07:05 +08:00
Alex Lam S.L
bd6dee52ab fix return from recursive IIFE (#1570) 
`side-effects` did not account for IIFEs being able to reference itself thus making its return value potentially significant
 2017-03-08 03:31:51 +08:00
Alex Lam S.L
8a8a94a596 fix deep cloning of labels (#1565) 
`AST_Label.references` get `.initialize()` to `[]` every time after `.clone()`

So walk down the tree to pick up the cloned `AST_LoopControl` pieces and put it back together.
 2017-03-07 18:38:27 +08:00
Alex Lam S.L
8153b7bd8a transform function calls to IIFEs (#1560) 
- expose function body to call sites for potential optimisations
- suppress substitution of variable used within `AST_Defun`
 2017-03-07 15:37:52 +08:00
Alex Lam S.L
d787d70127 avoid substitution of global variables (#1557) 
- unless `toplevel` is enabled
- global `const` works as before
 2017-03-07 03:11:03 +08:00
kzc
3ac2421932 collapse_vars: do not replace a constant in loop condition or init (#1562) 2017-03-07 01:42:33 +08:00
Alex Lam S.L
a9fc9ddc33 suppress semicolons after do/while (#1556) 
- unless both `beautify` & `screw-ie8` are enabled
- deprecate workaround for if-do-while-else

fixes #186
 2017-03-06 17:31:35 +08:00
Alex Lam S.L
067e5a5762 fixup for #1553 (#1555) 
- `++a` is the one that is foldable
- transform `a++` into `++a` for better optimisation
 2017-03-05 17:15:37 +08:00
Alex Lam S.L
35a849dc48 collapse assignment with adjacent subsequent usage (#1553) 
- consolidate `cascade` optimisations
- support ++/-- postfixes
- remove redundant optimisation identified in #1460

fixes #368
 2017-03-05 14:56:14 +08:00
Alex Lam S.L
b70591be1a handle variable declaration within catch blocks (#1546) 
accounts for IE8- scoping
 2017-03-05 13:13:44 +08:00
Alex Lam S.L
b33e7f88e6 improve unsafe on undefined (#1548) 
`unsafe` turns undefined keyword into a variable of the same name if found, but that interferes with other related optimisations.

Keep track of such transformations to ensure zero information loss in the process.
 2017-03-05 13:09:27 +08:00
Alex Lam S.L
1f0333e9f1 stay safe with constants in IE8- (#1547) 
- `undefined` etc. can be redefined at top-level for IE8-, so disable related optimisations
- fixed `--support-ie8` catch mangle bug
 2017-03-05 12:51:11 +08:00
Alex Lam S.L
eb98a7f2f3 fix handling of shebang and preamble (#1545) 
fixes #1332
 2017-03-05 12:16:02 +08:00
Alex Lam S.L
78d1bb92d4 fix a corner case in #1530 (#1552) 2017-03-05 12:12:59 +08:00
kzc
ce54c9ccee disallow collapse_vars constant replacement in for-in statements (#1543) 2017-03-04 02:39:54 +08:00
Alex Lam S.L
07accd2fbb process code with implicit return statement (#1522) 
Bookmarklet for instance implicitedly assumes a "completion value" without using `return`.
The `expression` option now supports such use cases.
Optimisations on IIFEs also enhanced.

fixes #354
fixes #543
fixes #625
fixes #628
fixes #640
closes #1293
 2017-03-03 18:13:07 +08:00
Alex Lam S.L
18059cc94f compress numerical expressions (#1513) 
safe operations
- `a === b` => `a == b`
- `a + -b`  => `a - b`
- `-a + b`  => `b - a`
- `a+ +b`   => `+b+a`

associative operations
(bit-wise operations are safe, otherwise `unsafe_math`)
- `a + (b + c)`       => `(a + b) + c`
- `(n + 2) + 3`       => `5 + n`
- `(2 * n) * 3`       => `6 * n`
- `(a | 1) | (2 | d)` => `(3 | a) | b`

fixes #412
 2017-03-03 18:04:32 +08:00
Alex Lam S.L
b5e0e8c203 facilitate fix for #1531 (#1542) 2017-03-03 07:12:24 +08:00
Alex Lam S.L
17b81350d4 fix chained assignment with unused (#1540) 
When #1450 optimises `a=b=42`, it stops after the first variable even if both are unused.

fixes #1539
 2017-03-03 04:45:20 +08:00
kzc
4d63d4f5b3 collapse_vars should not replace constant in for-in init section (#1538) 
fixes #1537
 2017-03-03 03:51:15 +08:00
Alex Lam S.L
70d72ad806 properly cover all cases of for-in loop variables (#1536) 2017-03-03 02:39:57 +08:00
Alex Lam S.L
fe9227a41b fix reference marking in for-in loops (#1535) 
fixes #1533
 2017-03-03 00:56:06 +08:00
Alex Lam S.L
b49e142a26 disable do{...}while(false) optimisation (#1534) 
- fails to handle `break` in body

fixes #1532
 2017-03-03 00:54:41 +08:00
kzc
ee3b39b909 optimize trivial IIFEs returning constants (#1530) 2017-03-02 15:11:40 +08:00
Alex Lam S.L
9699ffb1af trim unused invocation parameters (#1526) 2017-03-02 11:33:59 +08:00
Alex Lam S.L
fdc9b9413b minor improvement to string optimisation (#1514) 
- "" + "a"     => "a"
- "" + a + "b" => a + "b"
- "a" + ""     => "a" (improving on #45)
 2017-03-02 11:31:39 +08:00
Alex Lam S.L
7aa69117e1 fix corner cases in reduce_vars (#1524) 
Avoid variable substitution in the following cases:
- use of variable before declaration
- declaration within conditional code blocks
- declaration within loop body

fixes #1518
fixes #1525
 2017-03-02 00:20:53 +08:00
Alex Lam S.L
c2334baa48 fix crash on missing props to string_template() (#1523) 
Patched up `make_node()` without `orig`.

There may be other cases where `start` could be missing, so make it print "undefined" instead of crashing.

fixes #1518
 2017-03-01 15:25:26 +08:00
Alex Lam S.L
f5cbe19b75 invert reduce_vars tracking flag (#1519) 
Modules like webpack and grunt-contrib-uglify still uses `ast.transform(compressor)` before `Compressor.compress(ast)` was introduced.

Workaround this compatibility issue by deactivating `reduce_vars` in such case.

Also fix use case with omitted `options` when calling `Compressor()`.

fixes #1516
 2017-03-01 04:12:10 +08:00
Alex Lam S.L
b34fa11a13 fix evaluate on object getter & setter (#1515) 2017-03-01 02:03:47 +08:00
Alex Lam S.L
4365a51237 temporarily disables reduce_vars (#1517) 
... as we investigate #1516
 2017-03-01 00:25:43 +08:00
Alex Lam S.L
858e6c78a4 warn & drop #__PURE__ iff IIFE is dropped (#1511) 
- consolidate `side-effects` optimisations
- improve string `+` optimisation
- enhance literal & `conditionals` optimisations
 2017-02-28 02:25:44 +08:00
Alex Lam S.L
872270b149 improve error messages (#1506) 
- better inheritance of `Error` sub-classes
- mark parse error against source in CLI

closes #235
closes #348
closes #524
closes #1356
closes #1405
 2017-02-27 03:40:54 +08:00
Alex Lam S.L
13be50a4a9 faster tree transversal (#1462) 
- convert `[].forEach()` to for-loops
 2017-02-26 05:58:26 +08:00
Alex Lam S.L
16cd5d57a5 consolidate evaluate & reduce_vars (#1505) 
- improve marking efficiency
- apply smarter `const` replacement to `var`

fixes #1501
 2017-02-26 00:40:33 +08:00
Ondřej Španěl
852f78491a Avoid using exports when undefined (#1471) 
Makes direct usage within web browser easier, even if officially unsupported.
 2017-02-24 08:51:24 +08:00
Alex Lam S.L
229e42cdee Merge pull request #1485 from alexlamsl/merge-2.8.0 
2.8.0 staging
 2017-02-24 07:33:57 +08:00
alexlamsl
4e49302916 enable collapse_vars & reduce_vars by default 
- fix corner cases in `const` optimisation
- deprecate `/*@const*/`

fixes #1497
closes #1498
 2017-02-24 01:46:57 +08:00
kzc
1e51586996 Support marking a call as pure 
A function call or IIFE with an immediately preceding comment
containing `@__PURE__` or `#__PURE__` is deemed to be a
side-effect-free pure function call and can potentially be
dropped.

Depends on `side_effects` option.

`[#@]__PURE__` hint will be removed from comment when pure
call is dropped.

fixes #1261
closes #1448
 2017-02-21 14:24:18 +08:00
Ondřej Španěl
d48a3080ac Fix: AST_Accessor missing start / end tokens 
fixes #1492
closes #1493
 2017-02-21 13:32:16 +08:00
alexlamsl
26fbeece1c fix pure_funcs & improve side_effects 
- only drops side-effect-free arguments
- drop side-effect-free parts with discarded value from `AST_Seq` & `AST_SimpleStatement`

closes #1494
 2017-02-21 13:31:59 +08:00
alexlamsl
8898b8a0fe clean up max_line_len 
- never exceed specified limit
- otherwise warning is shown
- enabled only for final output

closes #1496
 2017-02-21 13:29:58 +08:00
alexlamsl
ec64acd2c8 introduce unsafe_proto 
- `Array.prototype.slice` => `[].slice`

closes #1491
 2017-02-21 13:29:58 +08:00
alexlamsl
ac0b61ed6e remove extraneous spaces between ++/+/--/- 
fixes #1377
closes #1488
 2017-02-21 13:29:58 +08:00
alexlamsl
09f9ae2de9 improve --beautify bracketize 
reduce whitespaces from if-else statements

fixes #1482
closes #1483
 2017-02-21 13:29:58 +08:00
alexlamsl
e275148998 enhance global_defs 
- support arrays, objects & AST_Node
- support `"a.b":1` on both cli & API
- emit warning if variable is modified
- override top-level variables

fixes #1416
closes #1198
closes #1469
 2017-02-21 13:29:58 +08:00
alexlamsl
974247c8c0 evaluate AST_SymbolRef as parameter 
fix invalid boolean conversion now exposed in `make_node_from_constant()`

closes #1477
 2017-02-21 13:29:58 +08:00
alexlamsl
a0f4fd390a improve reduce_vars and fix a bug 
- update modified flag between compress() passes
- support IIFE arguments
- fix corner case with multiple definitions

closes #1473
 2017-02-21 13:29:58 +08:00
alexlamsl
b8b133d91a improve keep_fargs & keep_fnames 
- utilise in_use_ids instead of unreferenced()
- drop_unused now up-to-date for subsequent passes

closes #1476
 2017-02-21 13:29:58 +08:00
kzc
6ffbecb72b smarter const replacement taking name length into account 
closes #1459
 2017-02-21 13:29:58 +08:00
alexlamsl
f0ff6189be clean up negate_iife 
- remove extra tree scanning phase for `negate_iife`
- `negate_iife` now only deals with the narrowest form, i.e. IIFE sitting directly under `AST_SimpleStatement`
- `booleans`, `conditionals` etc. will now take care the rest via more accurate accounting
- `a(); void b();` => `a(); b();`

fixes #1288
closes #1451
 2017-02-21 13:29:58 +08:00
alexlamsl
6b3c49e458 improve string concatenation 
shuffle associative operations to minimise parentheses and aid other uglification efforts

closes #1454
 2017-02-21 13:29:57 +08:00
alexlamsl
f584ca8d07 -c sequences=N suboptimal at N expression cutoff 
N = 2:
  a;
  b;
  c;
  d;
was:
  a, b;
  c;
  d;
now:
  a, b;
  c, d;

fixes #1455
closes #1457
 2017-02-21 13:29:57 +08:00
alexlamsl
ae4db00991 tweak do-while loops 
- `do{...}while(false)` => `{...}`
- clean up `AST_While` logic

closes #1452
 2017-02-21 13:29:57 +08:00
alexlamsl
100307ab31 fixes & improvements to [].join() 
fixes
- [a].join() => "" + a
- ["a", , "b"].join() => "a,,b"
- ["a", null, "b"].join() => "a,,b"
- ["a", undefined, "b"].join() => "a,,b"

improvements
- ["a", "b"].join(null) => "anullb"
- ["a", "b"].join(undefined) => "a,b"
- [a + "b", c].join("") => a + "b" + c

closes #1453
 2017-02-21 13:29:57 +08:00
alexlamsl
148047fbbf drop unused: toplevel, assign-only 
- assign statement does not count towards variable usage by default
- only works with assignments on the same scope level as declaration
- can be disabled with `unused` set to "keep_assign"
- `toplevel` to drop unused top-level variables and/or functions
- `top_retain` to whitelist top-level exceptions

closes #1450
 2017-02-21 13:29:57 +08:00
kzc
d11dca3cf9 fix stray else in compress with conditionals=false 
closes #1449
 2017-02-21 13:29:57 +08:00
alexlamsl
e5badb9541 enable typeof "undefined" for general use 
move out of unsafe, guard corner case with screw_id8 instead

closes #1446
 2017-02-18 19:01:42 +08:00
alexlamsl
fa668a28b4 fix corner case in keep_fnames 
happens when inner function:
- just below top level
- not referenced
- `unused` is disabled

closes #1445
 2017-02-18 19:00:54 +08:00
alexlamsl
686a496b1c remove unused AST_Scope.nesting & AST_SymbolRef.frame 
they are computed but never used

closes #1444
 2017-02-18 18:59:40 +08:00
alexlamsl
11676f9d72 fix crash in unsafe replacement of undefined 
remove extraneous call to AST_SymbolRef.reference()

closes #1443
 2017-02-18 18:58:23 +08:00
Anthony Van de Gejuchte
dd31d12a91 Improve optimizing function() { if(c){return foo} bar();} 
closes #1437
 2017-02-18 18:56:18 +08:00
Anat Dagan
81f1df14d7 in mangle_names there is a check that the variable name is legal and that it is not a reserved word. This should apply to propsmangle as well. 2017-02-10 14:13:47 +02:00
Alex Lam S.L
1eaa211e09 fix mangling collision with keep_fnames (#1431) 
* fix mangling collision with keep_fnames
fixes #1423

* pass mangle options to figure_out_scope()
bring command-line in line with minify()
 2017-01-26 12:18:28 +01:00
Alex Lam S.L
0610c020b1 optimise binary operands with evaluate() (#1427) 
- remove call to evaluate() in is_constant() and let nested optimize() does its job instead
- reject RegExp in is_constant() and remove special case logic under collapse_vars
- operands to conditionals optimisation are now always evaluate()-ed
- throw error in constant_value() instead of returning undefined to catch possible bugs, similar to make_node_from_constant()
- optimise binary boolean operators under `evaluate` instead of `conditionals`
 2017-01-26 12:16:50 +01:00
Alex Lam S.L
0d7d4918eb augment evaluate to extract within objects (#1425) 
- gated by `unsafe`
- replaces previous optimisation specific to String.length
- "123"[0] => 1
- [1, 2, 3][0] => 1
- [1, 2, 3].length => 3
- does not apply to objects with overridden prototype functions
 2017-01-26 12:14:18 +01:00
alexlamsl
48284844a4 add missing LHS cases which global_defs should avoid 2017-01-19 21:06:28 +01:00
Martijn Swaagman
98f330658f Generate source map data from normalized files 
If using `inSourceMap` this fix will ensure the copying of `sourcesContent` is based on potentially normalized `sources` values (https://github.com/mozilla/source-map/blob/master/lib/source-map-consumer.js#L304-L309).

For example `normalize` (https://github.com/mozilla/source-map/blob/master/lib/util.js#L80-L123) will rewrite `./dist/mySource.js` to `dist/mySource.js` in the target `_sources` of the `SourceMapConsumer`. As a result `orig_map.sourceContentFor(source, true);` would return `null` since the orginal `source` was no longer available in the consumer. By using the keys generating from the `SourceMapConsumer.constructor` consistency is ensured.
 2016-11-29 20:42:56 +01:00
Ashley (Scirra)
2a9989dd18 Add --mangle-props-debug and fix --mangle-props=unquoted collision 
Patch by @AshleyScirra

Based on: PR #1316

Renamed the CLI debug option to --mangle-props-debug

Fixes: #1321 name collision in --mangle-props=unquoted
 2016-11-29 20:25:39 +01:00
Anthony Van de Gejuchte
79b98a9fe8 Do not overwrite options.comments + cleanup 2016-11-29 20:24:08 +01:00
Anthony Van de Gejuchte
8d74f34373 Don't filter shebangs when using the 'some' comment filter 
Also clarify documentation a bit more about using regexp as filter
 2016-10-23 21:31:03 +02:00
Jann Horn
266ddd9639 fix uses_arguments handling (broken since 6605d15783) 
Using the symbol declaration tracking of UglifyJS doesn't make sense here
anyway, `arguments` always comes from something in the current scope.

fixes #1299
 2016-10-23 21:29:18 +02:00
Richard van Velzen
6389e52305 Remove console.log and add extra test case 2016-10-06 14:11:32 +02:00
Richard van Velzen
e05510f3bc Add an option to wrap IIFEs in parenthesis 
For #1307.
 2016-10-06 14:11:32 +02:00
kzc
fc9804b909 Fix (typeof side_effect()) in boolean context 
Fixes #1289 with suggestion by @rvanvelzen
 2016-10-06 13:50:11 +02:00
alexlamsl
4761d07e0b Optimize unmodified variables 2016-10-01 11:36:11 +02:00
Anthony Van de Gejuchte
0111497fc9 Make all comment options in cli available in js api 
Also removing more code within "loop" while at it.
 2016-09-06 17:54:45 +02:00
kzc
25fc02743a Account for side effects in string + expr optimization 2016-09-01 09:24:56 -04:00
kzc
0bd8053524 implement optimization: (x = 2 * x) ---> (x *= 2) 2016-08-30 08:43:02 -04:00
Richard van Velzen
8430123e9d Fix negate_iife transform to return a correct tree for nested IIFEs 
Fix for #1256, partially reverts d854523783
 2016-08-17 11:55:59 +02:00
kzc
d854523783 Fix negate_iife regression #1254 2016-08-17 01:29:34 -04:00
kzc
de619ae5a6 Fix --mangle-props and --mangle-props=unquoted 
Fixes: #1247

Fix --mangle-props and --name-cache inconsistency.
AST_Dot and AST_Sub properties are now mangled by --mangle-props
without regard to being used in an assignment statement.

Note: if --mangle-props is used then *all* javascript files used must
be uglified with the same mangle options.

Fix the ignore_quoted=true mangle option, also known as
`--mangle-props=unquoted`.  If a given property is quoted anywhere
it will not be mangled in any quoted or non-quoted context.
 2016-08-14 21:51:25 +02:00
kzc
fb049d3a81 Fix unneeded parens around unary args in new expression. 2016-08-14 21:38:38 +02:00
Anthony Van de Gejuchte
642273c290 Legacy octal integer strict mode fixes 2016-07-21 14:42:16 +02:00
Lauri Pokka
41a9329409 lib/sourcemap.js: Copy sourceContent from old souce-map to the new source-map. Should fix #882 2016-07-17 19:36:15 +02:00
Anthony Van de Gejuchte
7eb52d2837 Keep const in own scope while compressing 
- Fixes #1205
- Fix provided by @kzc
 2016-07-15 13:20:52 +02:00
kzc
eb63fece2f Fix mangle with option keep_fnames=true for Safari. 
Fixes: #1202
 2016-07-15 13:18:14 +02:00
Anthony Van de Gejuchte
2d8af8947e Fix error style for regex errors 2016-07-15 13:14:30 +02:00
Anthony Van de Gejuchte
698705a820 Don't convert all strings to directives from moz-ast 2016-07-03 12:36:57 +02:00
kzc
b40d5de69c Change the default sequences limit to 200 to speed up compress. 
Has little or no impact on minification size in the majority of
cases but can speed up rollup builds significantly.

This sequences change also has the beneficial side effect of avoiding
"stack size exceeded" errors on very large input files.

The user is free to alter the sequences limit if they are so inclined.
The previous sequences limit was 2000. 20 is often sufficient.
 2016-07-01 09:41:31 +02:00
kzc
b7ef7840f3 Allow sequences maximum length to be user configurable. 2016-07-01 09:41:31 +02:00
Anthony Van de Gejuchte
a97690fc72 Various LineTerminator changes 
* Escaped newlines should also produce SyntaxError
* Fix multiline comment parsing and add tests
* Adapt makePredicate to handle \u2028 and \u2029
* Move up nlb check in regex so it's checked before any escape handling
* Change error messages to conform ecma standard
* Find_eol not recornizing \u2028 and \u2029 as line terminator
* Remove \u180e as it is removed in unicode 6.3.0 from the category zs
 2016-06-30 22:12:50 +02:00
kzc
02c638209e Enable --screw-ie8 by default. 
catch identifier is mangled correctly for ES5 standards-compliant JS engines by default.

Unconditionally use the ie8 if/do-while workaround whether or not --screw-ie8 is enabled.

To support non-standard ie8 javascript use: uglifyjs --support-ie8
 2016-06-30 21:49:48 +02:00
kzc
335b72df03 Fix spidermonkey AST (ESTree) export and import, Array holes 
Fixes: #1156 #1161

Also add test to exercise Uglify after spidermonkey export/import of itself.
 2016-06-30 21:44:12 +02:00
Anthony Van de Gejuchte
3a7d53f3cf Move OctalEscapeSequence to read_escape_char 
This should simplify and improve implementation, make it easier to
implement template strings, and keep master a bit more in sync with
harmony.

Previous implementation wasn't broken, though the loop gave me the
impression it could read infinite numbers and annoyed me a bit. It was
also slightly unnecessary because the lookup involved only 3 characters.
 2016-06-30 21:42:15 +02:00
kzc
ace8aaa0f4 Fix conditional expressions of form (x ? -1 : -1) 
Fixes #1154, #1153
 2016-06-21 14:52:13 -04:00
kzc
0c003c92a8 Don't replace undefined, NaN and Infinity within with scope 2016-06-21 10:53:29 +02:00
Anthony Van de Gejuchte
85fbf86d7b Keep master in sync with harmony 
* Do not mangle when no mangle is required
 * Improve use_asm reset while printing code
 2016-06-20 18:42:17 +02:00
Shrey Banga
e645ba84cf
Respect quote style in object literals 
The option added in fbbaa42ee5 wasn't
being respected inside object literals, so quoted property names would
still be stripped out with this option.

This is mostly a corner-case, but useful when the output is passed to
something like the Closure compiler, where quoted property names can be
used to prevent mangling.
 2016-06-19 21:13:31 +02:00
Anthony Van de Gejuchte
6c99816855
Normalize error messages 2016-06-19 21:08:34 +02:00
Anthony Van de Gejuchte
2149bfb707
Don't mix strings with directives in output 
* Don't interpret strings with escaped content as directive
 * Don't interpret strings after empty statement as directive
 * Adapt output to prevent strings being represent as directive
 * Introduce UGLIFY_DEBUG to allow internal testing like EXPECT_DIRECTIVE
 2016-06-19 20:59:17 +02:00
Anthony Van de Gejuchte
d7971ba0e4 Fix test262 failures related to <, <=, in and instanceof 
Fixed-by: @kzc
 2016-06-15 23:11:08 +02:00
Anthony Van de Gejuchte
5c4cfaa0a7 Re-add parens after new expression in beautify mode 2016-06-12 20:03:48 +02:00
Anthony Van de Gejuchte
bb9c9707aa Don't allow with statements in strict mode 2016-06-12 19:08:16 +02:00
Anthony Van de Gejuchte
6c8e001fee Stop dropping args in new expressions 2016-06-12 17:17:17 +02:00
David Bau
f99b7b630d Escape null characters as \0 unless followed by 0-7. 2016-06-12 14:32:32 +02:00
Anthony Van de Gejuchte
ea31da2455 Don't drop unused if scope uses with statement 
Fix provided by @kzc
 2016-06-12 14:30:28 +02:00
Anthony Van de Gejuchte
4d7746baf3 Throw errors in strict mode for octal strings 
Adds a directive tracker for the parser/tokenizer to
allow parsing depending on directive context.
 2016-06-12 14:27:08 +02:00
Anthony Van de Gejuchte
8287ef6781 Fix uglify attempting to rewrite invalid new expressions 2016-06-08 19:45:21 +02:00
Anthony Van de Gejuchte
00ad57e393 Do not allow newlines in regex 2016-06-05 17:02:19 +02:00
kzc
09d5707a8a collapse_vars: Do not consider RegExp literals to be constants 
Fixes #1100
 2016-05-27 00:03:51 -04:00
kzc
1e390269d4 Optimize if_return for single if/return cases. 
Fixes #1089
 2016-05-24 17:54:08 +02:00
Richard van Velzen
bc49dfd27a Completely allow evaluating -0 2016-05-24 17:50:29 +02:00
Richard van Velzen
27eedbc302 Never produce -0 when evaluating expressions (like -"") 
Fix for #1085. The major case was already there, but more expressions can result in -0.
 2016-05-17 22:34:38 +02:00
kzc
5f464b41e2 Simplify iife new fix 
as suggested by @rvanvelzen.

Added a test for IIFEs in nested contexts.
 2016-05-15 19:12:17 -04:00
kzc
bcc1318d4b Do not apply negate_iife optimization to new expression 2016-05-09 03:19:28 -04:00
kzc
a0e03c9df4 Retain comments before AST_Constants during mangle. 2016-05-04 20:11:45 +02:00
kzc
f39fd3d583 Handle CR line endings in comments. 
Fixes #1050
 2016-05-04 20:02:29 +02:00
Richard van Velzen
4fe630431c Hoist functions when reversing if (x) return; ... vs. if (!x) ... 
Fixes #1052
 2016-04-23 23:48:33 +02:00
kzc
c55dd5ed74 Add passes compress option. Fix duplicate compress warnings. 2016-04-19 20:05:33 +02:00
kzc
e4fa4b109a Parse comments without recursion to avoid RangeError. 
Fixes #993
 2016-04-16 02:02:47 -04:00
Richard van Velzen
4b4528ee05 Prevent endless recursion when evaluating self-referencing consts 
Fix #1041
 2016-04-13 15:03:31 +02:00
Mihai Bazon
b5a7a231f7 Actually limit sequence length. 
Fix #1038
 2016-04-12 14:17:24 +03:00
kzc
3907a5e3b2 Fix warnings for referenced non-hoisted functions. 
Fixes #1034

Also added `expect_warnings` functionality to test framework.
 2016-04-11 18:15:20 +02:00
kzc
c70d176f35 Simplify member(name, array) implementation. 2016-04-07 09:57:30 -04:00
Mihai Bazon
9317237372 Avoid using inherited hasOwnProperty 
Fix #1031
 2016-04-07 13:16:22 +03:00
kzc
98434258d0 Optimize ternaries with boolean consequent or alternative. 
Fixes #511
 2016-04-02 17:22:12 +02:00
kzc
45ddb9caeb Speedup unused compress option for already minified code 
Fixes: #321 #917 #1022
 2016-03-28 17:58:50 -04:00
Mihai Bazon
f68de86a17 Merge pull request #1011 from kzc/dont-produce-let-in-mangle 
Do not produce `let` as a variable name in mangle.
 2016-03-24 18:16:26 +02:00
kzc
07bb7262d0 Escape all ASCII control characters within strings when using ascii_only. 
Fixes #1017.

Tab characters within strings are now output as `\t` in all output modes.
 2016-03-24 11:51:54 -04:00
kzc
a9d4a6291b Do not produce let as a variable name in mangle. 
Would previously occur in large generated functions with 21,000+ variables.
Fixes #986.
 2016-03-15 11:20:32 -04:00
philippsimon
ee6c9fabb7 Fix: Uglified Number.prototype functions on big numbers 2016-03-14 12:41:06 +01:00
kzc
102d1b9137 #877 Ignore mangle sort option 2016-02-27 15:33:10 -05:00
kzc
11b0efdf84 boolean_expression ? true : false --> boolean_expression 2016-02-22 17:59:36 +01:00
kzc
5486b68850 Take operator || precendence into account for AST_If optimization. 
Fixes #979.
 2016-02-21 12:05:02 -05:00
alexlamsl
6547437725 preserve ThisBinding for side_effects 2016-02-17 19:34:01 +01:00
Richard van Velzen
9662228f6a Don't compress (0, eval)() to eval() 2016-02-16 19:00:48 +01:00
alexlamsl
31a9b05c96 Preserve ThisBinding in conditionals & collapse_vars 
Fixes #973
 2016-02-16 18:47:49 +01:00
sergeyv
7a4ed9d200 Revert "using the original sourcemap as the base" 
This reverts commit ad18689d92.

Reason for revert: introduce issue #882

Currently, generated sourcemap contains copy of all existing mappings and adds new mappings from uglified code to original one.
However, previous mapping are no longer valid and shouldn't be added.
 2016-02-10 10:19:39 +01:00
kzc
7c3fee9e31 collapse_vars: avoid replacement across AST_Case nodes to be on safe side even though no issues seen. 2016-01-29 10:35:07 -05:00
kzc
929de2b0de collapse_vars: fix if/else and ternary operator side effects 2016-01-28 12:17:06 -05:00
kzc
af2472d85e collapse_vars: fix bug in repeated var defs of same name 2016-01-28 16:48:50 +01:00
kzc
0a38a688f9 fix bug in collapse_vars for right side of "||" and "&&" 2016-01-27 14:18:46 -05:00
kzc
f4c2ea37bf Collapse single use var definitions 
Fix #721
 2016-01-27 11:48:15 +02:00
Mihai Bazon
915f907186 Add start/end in the arguments definition 
(keeps my https://github.com/mishoo/jsinfo.el working)
 2016-01-27 11:36:03 +02:00
Richard van Velzen
b5a7197ae5 Merge pull request #928 from STRML/constPragma 
Mark vars with /** @const */ pragma as consts so they can be eliminated.
 2016-01-20 19:04:36 +01:00
Samuel Reed
1b703349cf
Tighten up @const regex. 2016-01-20 11:35:45 -06:00
Samuel Reed
4a7179ff91
Simplify by skipping extra tree walk. 2016-01-20 11:03:41 -06:00
Samuel Reed
f97da4294a
Use TreeWalker for more accurate @const results and update tests 2016-01-20 10:54:00 -06:00
Samuel Reed
8b71c6559b
Mark vars with /** @const */ pragma as consts so they can be eliminated. 
Fixes older browser support for consts and allows more flexibility
in dead code removal.
 2016-01-19 13:23:02 -06:00
Anthony Van de Gejuchte
26641f3fb2 Allow operator names as getters/setters 
Fixes #919

Fix provided by @kzc
 2016-01-19 19:28:51 +01:00
Anthony Van de Gejuchte
70e5b6f15b Add some tests for comment-filters through api 
Also never bother comment options to filter comment5/shebang comments
as they have their custom filter.
 2016-01-19 19:14:19 +01:00
Anthony Van de Gejuchte
6605d15783 Never mangle arguments and keep them in their scope 
Fixes #892

Helped-by: kzc
 2016-01-14 19:45:52 +01:00
Richard van Velzen
ac8db977b9 Merge pull request #905 from avdg/unit-tests 
Add unit tests
 2016-01-14 08:54:40 +01:00
Mihai Bazon
fe4e9f9d97 Fix hoisting the var in ForIn 
Close #913
 2016-01-05 13:56:52 +02:00
Anthony Van de Gejuchte
6f3e35bb3f Fix ch that could contain other newline characters 2015-12-27 22:24:37 +01:00
Anthony Van de Gejuchte
174404c0f3 Do not allow newlines in string literals 2015-12-26 15:08:37 +01:00
Richard van Velzen
60c4030a4d Merge pull request #874 from kzc/fix-conditionals 
#873 Fix `conditionals` optimizations with default compress options
 2015-12-26 14:28:33 +01:00
Anthony Van de Gejuchte
bd99b00413 Semicolon after do...while statement is optional 2015-12-17 23:02:35 +01:00
kzc
774bda13cd #873 Fix conditionals optimizations with default compress options 2015-11-24 13:27:50 -05:00
Mihai Bazon
7f48d5b33c Fix endless loop 
Close #866
 2015-11-16 12:08:24 +02:00
Mihai Bazon
b6968b6bd2 Limit max iterations for tighten_body 
Ref #866
 2015-11-16 12:08:24 +02:00
Mihai Bazon
08623aa6a7 Fix output for "use asm" code from SpiderMonkey AST 
(will only work properly if the SM tree contains "raw" properties for
Literal number nodes)
 2015-11-12 12:18:25 +02:00
Mihai Bazon
c898a26117 Build label def/refs info when figuring out scope 
Fix #862
 2015-11-12 11:48:06 +02:00
Mihai Bazon
7691bebea5 Rework has_directive 
It's now available during tree walking, i.e. walker.has_directive("use
asm"), rather than as part of the scope.  It's thus no longer necessary
to call `figure_out_scope` before codegen.  Added special bits in the
code generator to overcome the fact that it doesn't inherit from
TreeWalker.

Fix #861
 2015-11-11 22:15:25 +02:00
Mihai Bazon
3c4346728e Merge pull request #854 from kzc/moz-regexp-2 
Have mozilla AST RegExpLiteral parser use regex.pattern and regex.flags
 2015-11-10 10:12:30 +02:00
Mihai Bazon
18d37ac761 Fix parsing invalid input 
i.e. `x = 1.xe` — because parseFloat("1.xe") returns 1, this parsed as
`x = 1`.

Ref #857
 2015-11-09 13:15:20 +02:00
Richard van Velzen
63d35f8f6d Prevent ReDoS by not using a regexp to verify floating point numbers 
`parseFloat` will return `NaN` for invalid numbers anyway, which is the check used to throw the parse error.

Fixes #857
 2015-11-09 11:28:27 +01:00
kzc
7dbe961b2d simplify mozilla AST RegExpLiteral token parse and handle corner cases of regex.pattern better 2015-11-02 13:10:37 -05:00
kzc
94c4daaf9e Have mozilla AST RegExpLiteral parser use regex.pattern and regex.flags rather than non-standard raw property. 2015-11-02 12:24:09 -05:00
kzc
37ee9de902 rename To_Moz_Literal to To_Moz_RegExp 2015-11-01 10:20:42 -05:00
kzc
83db98ad3b Fixed RegExp literal in mozilla AST generation/output and added a --dump-spidermonkey-ast flag 2015-11-01 01:02:52 -04:00
kzc
bd0ae6569f return undefined optimization no longer uses return_void_0 option 2015-10-29 08:19:12 +01:00
kzc
7491d07666 optimize return undefined and return void 0 2015-10-29 08:19:12 +01:00
Richard van Velzen
335e349314 Allow specification beautify options in tests 
Caught an error in #847 as well - `output` wasn't passed anywhere which led to an exception. `options` was available though.
 2015-10-28 20:50:01 +01:00
Michael Ficarra
a887cde9f2 fixes #845: \v escaping should be restricted to "screw_ie8" mode 2015-10-27 09:05:21 -07:00
Fábio Santos
b5623b19d4 Fix #836 2015-10-20 19:48:56 +01:00
startswithaj
6b2861e086 Make_string was missing \v and wasnt reversing vertical tabs even though read_escaped_char coverts them 2015-10-15 17:42:16 +10:00
kzc
dff54a6552 Fix other operator output related to <!-- or --> 2015-10-13 01:17:10 -04:00
Mihai Bazon
17eef5a3c2 Only encode <!-- and --> in strings when inline_script 2015-10-12 10:21:22 +03:00
kzc
9f1f21b810 Output -- > instead of --> in expressions. Escape <!-- and --> within string literals. 2015-10-12 10:19:17 +03:00
kzc
4d2f7d83af Fix handling of "use asm" when no command line flags are passed to uglifyjs. SCOPE_IS_NEEDED is unconditionally true now. Refactored floating point literal parsing to be more in keeping with the AST class design. 2015-10-07 13:10:53 -04:00
kzc
593677d2ff Add proper support for "use asm"; blocks. Disable -c optimization within "use asm"; sections and preserve floating point literals in their original form. Non-asm.js sections are optimized as before. Asm.js sections can still be mangled and minified of whitespace. No special command line flags are required. 2015-10-07 10:00:28 +02:00
Anthony Van de Gejuchte
c69294c449 Implement shebang support 2015-10-06 22:35:45 +02:00
Mihai Bazon
6637c267a5 Fix mozilla-ast after module loading changes 
Need to explicitly qualify stuff now, since it's not evaluated in some
global scope.

Ref #636
 2015-09-24 18:13:21 +03:00
Mihai Bazon
99233c44cc No longer use vm to load code. 
Improves performance 2x on node > 0.10.

Ref #636
 2015-09-24 17:58:51 +03:00
Mihai Bazon
33528002b4 Fix wrap_commonjs to include code first 
(code could have directives, i.e. "use strict")
 2015-09-24 17:58:51 +03:00
Ville Lautanala
5fd12451f9 Control keeping function arguments with a single option 2015-09-14 19:38:45 +02:00
Richard van Velzen
fcde6109b0 Fix bad parsing of new new x()() constructs 
Fixes #739
 2015-08-27 12:29:36 +03:00
Richard van Velzen
e3bd223dac Don't change sequences that influence lexical binding in calls 
Fixes #782
 2015-08-25 10:53:35 +02:00
Christopher Chedeau
3ff0b9e0c9 [Fix] --define replaces SymbolRefs in LHS of assignments 
See #208 for context
 2015-08-10 11:22:36 -07:00
Richard van Velzen
759b3f7d6d Fix mangling of property names which overwrite unmangleable properties 
Fixes #747.
 2015-08-05 21:18:39 +02:00
Richard van Velzen
66761d7ecf Fix semicolon printing when restricting max line length 
Fixes #755
 2015-07-30 16:13:32 +02:00
Chris Cowan
9854deb626 Re-use the caught exception's error message in the parse error call. 2015-07-29 15:06:52 +02:00
Chris Cowan
d6814050dd Give a good error message if an invalid regular expression is found. 2015-07-29 15:05:59 +02:00
thorn0
252fc65558 Advanced way to specify if a function call might have side effects. #400 2015-07-29 14:36:42 +02:00
Mihai Bazon
905b601178 Don't attempt to negate non-boolean AST_Binary 
Fix #751
 2015-07-22 16:55:55 +03:00
Mihai Bazon
63fb2d5a44 Merge pull request #735 from kzc/master 
optimizations for && and || where left side is constant expression
 2015-07-20 09:58:01 +03:00
Mihai Bazon
85a5fc0aeb Don't drop parens in a * (b * c). Close #744 2015-06-30 10:10:29 +03:00
kzc
f47b2b52a5 operator && and || optimization: add "else" before "if" as intended 2015-06-14 17:44:26 -04:00
kzc
fedb6191a1 optimizations for && and || where left side is constant expression 2015-06-11 23:22:38 -04:00
Joao Carlos
0ac6918a41 Add --mangle-regex option 2015-06-09 14:16:50 +03:00
Mihai Bazon
bce4307e9e Treat \uFEFF as whitespace. 
Fix #714
 2015-05-20 16:17:46 +03:00
Mihai Bazon
a5b60217ce Fix compressing conditionals 
Only transform foo() ? EXP(x) : EXP(y) into EXP(foo() ? x : y) if EXP has no
side effects.

Fix #710
 2015-05-18 13:56:04 +03:00
Mihai Bazon
44fd6694eb fix again reserved props 2015-05-13 22:03:00 +03:00
Mihai Bazon
e48db3a8b6 Make reserved names take priority over the name cache 2015-05-07 15:01:16 +03:00
Mihai Bazon
e637bdaf4e Only drop the BOM when it's the first character. 
Close #704
 2015-05-05 10:11:38 +03:00
Mihai Bazon
4aed0830e5 Fix blank lines in the output. 
The issue was more obvious when max_line_len has a small value, rather than
the default 32K characters.  A blank line showed up after most statements.
 2015-05-04 17:55:42 +03:00
Mihai Bazon
c3a10c135e Avoid spurious brackets when dropping unused vars 
Fix #702
 2015-05-04 14:49:17 +03:00
Mihai Bazon
92e4340732 Fix parsing strings with literal DOS newlines 
(should not set newline_before)

Fix #693
 2015-04-23 12:08:19 +03:00
Mihai Bazon
7b22f2031f If name_cache is specified, do rename cached properties 
(even if --mangle-props is not there)
 2015-04-22 17:34:49 +03:00
Mihai Bazon
274e1b3dc7 Drop NaN -> 0/0 transformation. 
Fix #687
 2015-04-17 11:26:36 +03:00
Mihai Bazon
18c63ff3d8 Fix compression of conditionals 
Don't move the condition on the right side of an assignment when
the left side may have side effects.

Fix #677
 2015-04-13 17:29:48 +03:00
Mihai Bazon
e04ef56243 Use the before visitor in mangle props 
(works around a bug in our tree walker which, while cloning nodes, breaks
references between labeled statements and break/continue labels)
 2015-04-10 11:33:29 +03:00
Mihai Bazon
a79ff060d0 Merge branch 'propmangle' 2015-03-29 12:50:43 +03:00
Mihai Bazon
276b9a31cd Fix compressing ![foo()]; as a statement 
need to check whether the literal has any side effects before replacing that
with `false`.
 2015-03-23 23:27:00 +02:00
Mihai Bazon
5801fa39e9 [sequencesize] Actually even better: 
do create the sequence even if the stat list is bigger than 2000 statements,
but limit the sequence itself to 2000 expressions.

Ref #414
 2015-03-22 13:02:45 +02:00
Mihai Bazon
f0ab1b02e6 Avoid sequencesize for more than 2000 statements. 
It hardly saves any bytes for a sequence so long, and it risks blowing the
stack with the recursive Seq functions.

Ref #414
 2015-03-22 12:51:15 +02:00
Mihai Bazon
36c28e02fd Add start/end nodes for NaN/Infinity transformations 2015-03-22 12:50:36 +02:00
Mihai Bazon
ecfd881ac6 Keep unused function arguments by default 
Discarding unused function arguments affects function.length, which can lead
to some hard to debug issues.  This optimization is now done only in "unsafe
mode".

Fix #121
 2015-03-20 10:28:51 +02:00
Mihai Bazon
80d1c8206b Fix parsing for U+2028 / U+2029 
(they should be treated as whitespace)
 2015-03-18 10:11:37 +02:00
Mihai Bazon
d36faffeca Fix parsing for U+2028 / U+2029 
(they should be treated as whitespace)
 2015-03-18 10:09:30 +02:00
Mihai Bazon
aa45f6586e rename --prop-cache to --name-cache 
... and support storing there variable names as well, to help with multiple
invocations when mangling toplevel.
 2015-03-16 13:16:30 +02:00
Mihai Bazon
0c80d21e01 Fix prop mangling 
Even if not “defined”, do mangle if name exists in the cache.
 2015-03-16 10:53:31 +02:00
Mihai Bazon
ea3430102c Add property name mangler 
We only touch properties that are present in an object literal, or which are
assigned to.  Example:

    x = { foo: 1 };
    x.bar = 2;
    x["baz"] = 3;
    x[cond ? "qwe" : "asd"] = 4;
    console.log(x.stuff);

The names "foo", "bar", "baz", "qwe" and "asd" will be mangled, and the
resulting mangled names will be used for the same properties throughout the
code.  The "stuff" will not be, since it's just referenced but never
assigned to.

This *will* break most of the code out there, but could work on carefully
written code: do not use eval, do not define methods or properties by
walking an array of names, etc.  Also, a comprehensive list of exclusions
needs to be passed, to avoid mangling properties that are standard in
JavaScript, DOM, used in external libraries etc.
 2015-03-14 11:22:28 +02:00
Edward Casbon
ae07714927 Add filename to the JS_Parse_Error exception. 
It would be nice to have access to the filename of the file that includes the code that causes a JavaScript error. This is especially handy if uglifying multiple files at once.

Only a small change is needed for this to happen as it's already available in the function that throws the error.
 2015-02-11 23:21:22 +01:00
Richard van Velzen
992b6b9fcc Fix invalid removal of left side in && and || compression 
See #637. This does not produce the optimal result, but it does prevent the removal of non-side-effect-free code.
 2015-02-11 21:08:41 +01:00
Richard van Velzen
605362f89d Drop all console statements properly 
Because the base reference can be an member expression as well, we have to dig a bit deeper to find the leftmost base reference.

Fixes #451
 2015-01-31 13:24:44 +01:00
Mihai Bazon
fbbaa42ee5 Add option to preserve/enforce string quote style 
`-q 0` (default) use single or double quotes such as to minimize the number of
 bytes (prefers double quotes when both will do); this is the previous
 behavior.

`-q 1` -- always use single quotes

`-q 2` -- always use double quotes

`-q 3` or just `-q` -- always use the original quotes.

Related codegen option: `quote_style`.

Close #495
Close #460

Some `yargs` guru please tell me why `uglifyjs --help` doesn't display the
help string for `-q` / `--quotes`, and why it doesn't output the expected
argument types anymore, like good old `optimist` did.
 2015-01-27 22:26:27 +02:00
Anthony Van de Gejuchte
099992ecae Keep single line comments after nlb, after nlb 
Fixes #583
 2015-01-26 12:11:52 +01:00
Bryce Cronkite-Ratcliff
5c02d65ddb fixes issue #621 SourceMap toString JSON format 
The correct format of a sourcemap is acquired
from a mozilla source map generator by calling
toJSON on this object. This patch alters the
toString function on mozilla generators to print
the format that is to spec instead of the generator's
internal representation of itself.
 2015-01-24 00:33:02 -08:00
Mihai Bazon
d36067cd35 Merge pull request #615 from avdg/unicode 
Give parser more unicode support
 2015-01-20 13:00:31 +02:00
Anthony Van de Gejuchte
74cda80d3b Add unicode digit parsing support 2015-01-20 00:17:24 +01:00
Anthony Van de Gejuchte
9a3a848cc8 Update unicode letter 2015-01-20 00:17:03 +01:00
Tal Ater
a1a4c2ada7 Optimize conditionals where the consequent and alternative are both booleans and not equivalent 2015-01-13 18:27:21 +01:00
Richard van Velzen
42ecd42ac0 Replace the correct node when replacing in void sequences 
Close #611.
 2015-01-12 17:09:34 +01:00
Mihai Bazon
a10f6a96d7 Merge pull request #482 from arty-name/inline-ng-inject 
added @ngInject support for inline functions
 2015-01-11 12:10:42 +02:00
Mihai Bazon
61c233a08e Fix make_node_from_constant for Regexp-s 
Close #588
 2015-01-07 11:20:04 +02:00
Mihai Bazon
d2d716483a aborts(AST_If) returns the if node 
Previously it returned the abort node from the alternative branch.  This is
not much use as it can be different from the one in the body
branch (i.e. return vs. throw) and can trick us into issues like #591.

Fix #591
 2015-01-06 14:01:35 +02:00
Ingvar Stepanyan
f16033aafd Location fix for Mozilla AST start token. 2015-01-06 11:32:41 +01:00
Ingvar Stepanyan
ae5366a31d Track ending lines/columns; fix end locations in Mozilla AST. 2015-01-06 11:32:41 +01:00
Mihai Bazon
6b23cbc852 AST_Do nodes: walk body before condition 2015-01-06 12:29:07 +02:00
Mihai Bazon
13219cebcb Fix handling \r\n 
Close #437
 2015-01-05 12:14:42 +02:00
Mihai Bazon
e1f0747e4c Support keep_fnames in compressor, and --keep-fnames. #552 
Passing `--keep-fnames` will enable it both for compressor/mangler, so that
function names will not be dropped (when unused) nor mangled.
 2015-01-05 11:03:13 +02:00
Richard van Velzen
e37b67d013 Add an option to prevent function names from being mangled 
See #552. This is mostly useful for having the actual function names in traces.
 2015-01-04 21:48:43 +01:00
Caridy Patino
ad18689d92 using the original sourcemap as the base 
* Creates a new SourceMapGenerator based on a SourceMapConsumer:
  https://github.com/mozilla/source-map#sourcemapgeneratorfromsourcemapsourcemapconsumer
 2015-01-04 21:08:29 +01:00
Richard van Velzen
24bc09b79b Fix #556 
`\uFEFF` (ZERO WIDTH NO-BREAK SPACE) is removed when parsing, but was
un-escaped for the output when `ascii_only` was false.

When using
UglifyJS multiple times (creating packages from minified sources, for
example), this would lead to problems because the byte was removed when
parsing for the second time.
 2015-01-04 15:01:55 +01:00
Richard van Velzen
37c17d5541 Merge pull request #570 from rvanvelzen/fix-569 
Fix #569
 2015-01-04 14:02:08 +01:00
Richard van Velzen
120948fa48 Merge pull request #584 from clyfish/fix-base54 
fix base54
 2015-01-04 14:00:23 +01:00
Richard van Velzen
66e6f0c3cb Merge pull request #592 from micschro/patch-1 
Fix max_line_len not working for JSON files
 2015-01-04 13:53:31 +01:00
Richard van Velzen
f4d36a58c2 Fix #569 
When no arguments are given to `new Function()`, it should be treated as
a regular anonymous function (http://es5.github.io/#x15.3.2.1)
 2015-01-04 13:37:59 +01:00
Richard van Velzen
c75f5a1fd8 Fix #597 
NaN and Infinity were replaced in the output generation, instead of
during compression. This could lead to results where `1/0` was inserted
without parens leading to invalid output.

The nodes are replaced in the compression step now, and the output
generation returns their regular names. This should not be a problem,
since they're already only constructed from the original name.
 2014-12-31 12:23:00 +01:00
micschro
39d8880f2c Fix max_line_len not working for JSON files 
As `maybe_newline()` is only called when `might_need_semicolon` is `true`, the `max_line_len` option has no effect for files without (or with very few) semicolons (like JSON files). A simple for this problem is to use `maybe_newline()` instead of `noop` as the `newline()` function in non-beautify mode.
 2014-12-17 16:31:03 +01:00
Mihai Bazon
f101d6429b Merge pull request #546 from jacobk/patch-1 
Use uglify source map token names if missing
 2014-12-04 14:07:08 +02:00
Cheng Liangyu
fe06fc85d3 fix base54 2014-12-01 13:16:44 +08:00
Mihai Bazon
f36a1eaa8b Add option to allow return outside of functions. 
Close #288
 2014-10-20 18:12:13 +03:00
Mihai Bazon
01d19b4b52 Referencing a global is assumed to have side effects. 
Close #550
 2014-09-28 11:18:25 +03:00
Arnavion
7be680d3f8 Don't warn for an unreferenced exception symbol in a catch block. 2014-09-12 21:01:19 -07:00
Jacob Kristhammar
21b3c890a1 Use uglify source map token names if missing 2014-09-09 13:02:50 +02:00
Tal Ater
fb0ec720a4 Compress conditions that have side effects using sequences 2014-09-04 02:57:49 +03:00
Tal Ater
885835a655 Compress conditional assignments where all possible outcomes are equivalant and condition has no side effects 2014-09-02 23:30:25 +03:00
Mihai Bazon
4c64554808 Turn foo.new into foo["new"] when not --screw-ie8. Fix #534 2014-08-26 10:11:01 +03:00
Mihai Bazon
548beeb6b1 Prevent error for Function(""). Close #538 2014-08-20 09:16:34 +03:00
Ingvar Stepanyan
b467a3c877 Added generative testing for AST conversions. 2014-08-03 20:48:59 +03:00
Ingvar Stepanyan
5e314bf3e9 SpiderMonkey Identifier nodes should contain mangled names. 2014-08-03 01:28:58 +03:00
Ingvar Stepanyan
05ba26c7c8 Small fixes for AST conversion. 2014-08-02 13:18:27 +03:00
Ingvar Stepanyan
87b72364a4 Fixes and improvements for UglifyJS->SM AST conversion. 
* Explicitly forbidden multiple catch clauses as SM-specific feature.
* Simplified describing of UglifyJS->Mozilla AST conversion rules.
* Moved alias rules to single place.
* Removed usage of dynamic type bindings in generated code (speed-up).
 2014-08-01 23:45:37 +03:00
Ingvar Stepanyan
0e3ff1f970 Improved UglifyJS<->SpiderMonkey AST conversions. 
* Added directives recognition in SM AST.
* Moved semi-standard SM `Property` type to separate handler.
* Added `const` recognition from SM AST.
* Removed redundant `this`-as-identifier recognition.
* Removed redundant rules for abstract SM types.
* Described `CatchClause` using string syntax.
* Added support for semi-standard `range` tuple as location source.
* Added back-conversion support (to be improved).
 2014-08-01 23:42:34 +03:00
Mihai Bazon
62bda71c85 Fix parens for AST_Undefined 
Do the same as for AST_Unary, since we output undefined as `void 0`.

Reported at https://github.com/mishoo/UglifyJS2/issues/338#issuecomment-48858341
 2014-07-18 11:31:41 +03:00
Mihai Bazon
ac2caf1088 Check for the case an AST_For's init is an EmptyStatement 
(lame fix for #503)
 2014-07-01 23:10:44 +03:00
Dan Wolff
8511e80f48 Evaluate "foo".length ==> 3 2014-07-01 11:06:51 +03:00
Artemy Tregubenko
524a8a42a4 added @ngInject support for inline functions 2014-05-11 14:01:08 +02:00
Mihai Bazon
7bf59b5bcd Actually, even better. #475 
- also handle x = + ++y, x = - --y;
- don't use parens, a space suffices.
 2014-04-27 21:42:14 +03:00
Mihai Bazon
025f3e9596 Better fix for #475 2014-04-27 20:54:54 +03:00
Mihai Bazon
8258edd8a5 Fix parens in +(+x). Close #475 2014-04-27 20:51:01 +03:00
Mihai Bazon
71652690b6 Merge pull request #445 from ConradIrwin/try-statement 
Handle TryStatements trees from acorn >=0.2.0
 2014-04-24 10:46:53 +03:00
Mihai Bazon
8fbe200012 Always quote property names that contain non-ASCII characters. 
Fix #328
 2014-04-18 10:48:44 +03:00
Arnavion
e2e09d5754 Allow colons in the pairs passed to AST_Toplevel.wrap_enclose 2014-03-22 18:02:21 -07:00
Conrad Irwin
514936beb8 Handle TryStatements trees from acorn >=0.2.0 2014-03-06 17:07:49 -08:00
Arnavion
014f655c5f Handle the case when SourceMapConsumer.originalPositionFor returns null source. 
This happens when SourceMapConsumer does not have a valid position to map the input line and column. This is a change in mozilla/source-map starting from version 0.1.33

Fixes #436
 2014-03-02 19:20:19 -08:00
Mihai Bazon
bf30dc3038 Mangle name of exception when --screw-ie8. Fix #430. 
The effect of not mangling it was visible only with --screw-ie8 (otherwise
the names would be mangled exactly because they leaked into the parent
scope).
 2014-02-14 13:58:14 +02:00
Mihai Bazon
ef2ef07cbd Add option keep_fargs. 
By default it's `false`.  Pass `true` if you need to keep unused function
arguments.

Close #188.
 2014-02-08 12:33:56 +02:00
Matt Basta
ac0086a745 Simplify nested conditionals if possible 2014-02-06 12:39:13 -08:00
Mihai Bazon
5344b7dab8 Fix if_return dropping the alternative. Close #413 2014-01-31 10:44:13 +02:00
Mihai Bazon
e29048b54a Merge branch 'master' of github.com:mishoo/UglifyJS2 2014-01-26 10:07:10 +02:00
Mihai Bazon
ceb200fe81 Move unescaping regexps under a codegen option (unescape_regexps) 2014-01-26 10:05:55 +02:00
Daniel Stutzman
f5f8239057 Don't unescape \x00 in regexes (it breaks IE8) 2014-01-25 11:55:39 -07:00
Mihai Bazon
931862e97f More chars that cannot be unescaped in regexps. 2014-01-21 11:44:00 +02:00
Mihai Bazon
1d0127de21 Fix end token for conditionals. Close #404 2014-01-21 10:38:59 +02:00
Ville Lautanala
1e31011874 Don't unescape byte order marks in regexps 2014-01-19 12:27:03 +02:00
Mihai Bazon
4339bd5cfa Don't unescape \x2f (slash) in regexps. #54 2014-01-18 12:31:50 +02:00
Mihai Bazon
90a330da16 simplify 2014-01-10 10:36:15 +02:00
Mihai Bazon
cad1f9cbd1 Unescape Unicode sequences in regexps when ascii_only is false. #54 2014-01-10 10:33:58 +02:00
Mihai Bazon
c3087dd179 Better process_for_angular before other statement reductions. #395 2014-01-08 11:39:24 +02:00
Mihai Bazon
2c305af478 Support @ngInject with angular compressor option. Close #395. 2014-01-08 11:28:32 +02:00
Mihai Bazon
2c88eb6fbe doh. 2014-01-07 12:54:14 +02:00
Mihai Bazon
27142df4f5 minor: exp["10"] => exp[10] 2014-01-07 12:48:21 +02:00
Mihai Bazon
5e4c7f4245 Fix parens for property access -- (foo, bar)["baz"] 2014-01-05 11:48:01 +02:00
Mihai Bazon
b521b4b926 Conditional/call optimization 
foo ? bar(x) : bar(y)  ==>  bar(foo ? x : y)
 2013-12-29 10:31:30 +02:00
Mihai Bazon
aa9de76370 Mark yield as reserved word. Close #375. 2013-12-22 20:52:19 +02:00
Mihai Bazon
5a083a938d Optimize seq,void 0. Close #377. 
(x, void 0)    => void x
    (x, undefined) => void x
 2013-12-22 11:36:45 +02:00
Mihai Bazon
7a30d826b8 Better fix for comments in AST_Exit 
Close #374
 2013-12-18 15:54:12 +02:00
Mihai Bazon
be55a09edf Take out all comments from an AST_Exit's value 
Fix #372
 2013-12-18 13:30:26 +02:00
Mihai Bazon
428e19fed2 Add option to adjust the src/target line in the source map 2013-12-18 12:10:02 +02:00
Mihai Bazon
f65e55dff4 minor 2013-12-16 20:37:09 +02:00
colorhook
fa3300f314 bugfix #242 2013-12-16 15:53:43 +08:00
Mihai Bazon
bd0886a2c0 semicolons 2013-12-10 20:24:27 +02:00
Mihai Bazon
248f304f02 Merge pull request #245 from ForbesLindesay/patch-1 
Make `DefaultsError` a real `Error` object
 2013-12-10 10:23:29 -08:00
Mihai Bazon
dc5f70eab5 Add drop_console option to the compressor 2013-12-10 19:44:41 +02:00
Mihai Bazon
df8c5623af minor 2013-12-10 19:39:03 +02:00
Mihai Bazon
8f35a363d9 AST_Catch shouldn't really inherit from AST_Scope. Fix #363 
I hereby acknowledge that figure_out_scope has become a mess.
 2013-12-05 13:30:29 +02:00
Mihai Bazon
d2190c2bf3 Properly scope catch identifier when --screw-ie8 
Fix #344
 2013-11-28 16:43:30 +02:00
Mihai Bazon
c16d538ce7 Add --noerr to turn off argument name checking 
for now only used for keys passed to `-c` or `-b`.
 2013-11-28 13:15:01 +02:00
Mihai Bazon
50b8d7272c Fix faulty compression 
`String(x + 5)` is not always the same as `x + "5"`.  Overlooked that. :-(

Close #350
 2013-11-20 21:13:16 +02:00
Mihai Bazon
7d11b96f48 Only descend twice after drop_unused if it's the same node type. 
Fix #345
 2013-11-08 11:57:17 +02:00
Mihai Bazon
eab99a1c3d Better fix for #343 
We can in fact lift sequences, but only if the operation is assignment and
the left-hand side has no side effects nor property access -- that should
guarantee that whatever we place before it cannot affect the sense of the
assignment.

Dropped contrived test case (too hard to support it now), added a more
meaningful one.
 2013-11-06 10:48:48 +02:00
Mihai Bazon
f4919e3a25 Do not lift sequence from right-hand side of binary operation. Fix #343 2013-11-06 10:18:28 +02:00
Mihai Bazon
63287c0e68 Workaround for Safari bug 
Close #313
 2013-10-30 13:59:59 +02:00
Mihai Bazon
c5ed2292bf Fix parsing setters/getters (allow keywords for name). 
The "key" property was always "set" or "get", which didn't make much sense.
Now it'll be the actual name of the setter/getter (AST_Node), and the
AST_Accessor object itself, which represents the function, won't store any
name.

Close #319
 2013-10-30 11:50:22 +02:00
Mihai Bazon
b70670b69f Fix regression after e4c5302406 
`x * (y * z)` ==> `x * y * z` -- the better place to do this is in the
compressor rather than codegen.
 2013-10-30 10:45:58 +02:00
Mihai Bazon
9dd97605bc indentation 2013-10-30 10:44:50 +02:00
Mihai Bazon
e4c5302406 Fix output for x = 2 * (a % b / b * c) 
(issue #337)
 2013-10-30 09:11:55 +02:00
Mihai Bazon
bea3d90771 minor 2013-10-30 09:10:56 +02:00
Richard van Velzen
785c6064cc Disallow reversal where lhs has higher or equal precedence 
Fixes #267
 2013-10-29 21:37:36 +01:00
Mihai Bazon
b214d3786f Fix typo 2013-10-29 15:53:54 +02:00
Mihai Bazon
a14c6b6574 Avoid shadowing name of function expression with function argument 
Close #179, #326, #327
 2013-10-29 13:18:09 +02:00
Mihai Bazon
f1b7094a57 Add "preamble" output option 
Close #335
 2013-10-29 11:09:18 +02:00
Mihai Bazon
0358e376f0 Fix codegen for when comments_before is undefined. 
Fix #333
 2013-10-28 09:39:29 +02:00
Richard van Velzen
e2daee9a65 Fix RHS concat (raised in #330) 
When attempting to concat the left-side of the rhs, make sure the rhs is
a string.
 2013-10-26 18:44:52 +02:00
Richard van Velzen
1a5a4bd631 Fix #269 
Shorten most primitives where possible. Also optimize some edge cases.
 2013-10-24 11:08:33 +02:00
Richard van Velzen
7055af8221 Fix #280 
The `init` of the `ForStatement` is not a `BlockStatement` before it was
descended. The descend has to happen first, and *then* the actual
checks.
 2013-10-23 22:26:04 +02:00
Mihai Bazon
63d04fff69 Revert #3a81f60 for now 
(with it some tests break and it can generate invalid output, see issue #44)
 2013-10-22 21:50:55 +03:00
Mihai Bazon
d09f0adae3 arguments outside of a function is an ordinary variable. 
Fix #501
 2013-10-17 18:20:33 +03:00
Mihai Bazon
3fa9265ce4 wrap up 2013-10-09 22:15:43 +03:00
Mihai Bazon
3a81f60982 Don't drop_unused before compression. 
Fix #280, #282
 2013-10-09 19:15:09 +03:00
Mihai Bazon
f2348dd98b Rename clean_getters to pure_getters; add pure_funcs. 2013-10-04 13:17:25 +03:00
David Glasser
bb0a762d12 Only allow identifier start characters at the beginning of identifiers. 
Without this fix, the following source:

   x = {"\u200c": 42};

would incorrectly be converted into a quoteless key. But while \u200c is allowed
to be in identifiers, it cannot be at the beginning, as per ES5.

(For example, the SockJS client library doesn't work under uglify starting with
d9ad3c7c.)
 2013-10-03 17:02:19 -07:00
Mihai Bazon
8cc86fee60 add clean_getters compressor option (default false) 
allows one to specify if `foo.bar` is considered to have side effects.
 2013-10-02 19:38:01 +03:00
Mihai Bazon
88fb83aa81 minor optimization 
unlikely to help in hand-written code:

    (something() ? foo : bar) == foo  ==>  something()
 2013-10-02 15:31:31 +03:00
Mihai Bazon
95b4507c02 Fix error in the output minifying Function("return this")() 2013-09-30 11:49:29 +03:00
Mihai Bazon
afdaeba37d More attempts to determine when addition is associative 
Somebody hit me with bug reports on this. :)

Refs #300
 2013-09-22 15:26:10 +03:00
Mihai Bazon
037199bfe2 Actually let's move away those monsters from the evaluate function 
ev() should do a single thing — evaluate constant expressions.  if that's
not possible, just return the original node.  it's not the best place for
partial evaluation there, instead doing it in the compress functions.
 2013-09-22 15:00:42 +03:00
Mihai Bazon
583fac0a0f More dirty handling of [ ... ].join() in unsafe mode 
Close #300
 2013-09-22 13:14:42 +03:00
Dan Wolff
e8158279ff Evaluate [...].join() if possible: minor bugfix 
Follow-up to 78e98d2.
 2013-09-22 11:34:30 +03:00
Mihai Bazon
78e98d2611 When unsafe is set, evaluate [...].join() if possible 
Close #298
 2013-09-19 18:20:45 +03:00
Dan Wolff
8d14efe818 Concatenate strings also on the right-hand side of an expression that cannot be evaluated. Fix #126 
E.g. converts:
  a+'Hello'+'World'
to
  a+'HelloWorld'
 2013-09-19 13:03:03 +03:00
Mihai Bazon
83ba338bd0 Avoid printing <!-- in the output (HTML5 comment) 2013-09-06 10:10:45 +03:00
Mihai Bazon
7c10b25346 Support HTML5 comment syntax (enabled by default!) 
See http://javascript.spec.whatwg.org/#comment-syntax
    https://github.com/mishoo/UglifyJS/issues/503
    https://github.com/marijnh/acorn/issues/62
 2013-09-06 09:54:30 +03:00
Mihai Bazon
cb9d16fbe4 minor 2013-09-06 09:52:56 +03:00
Mihai Bazon
5d8da864c5 Fix names. 2013-09-02 19:38:00 +03:00
Mihai Bazon
85b527ba3d Disallow continue referring to a non-IterationStatement. Fix #287 
Simplifies handling of labels (their definition/references can be easily
figured out at parse time, no need to do it in `figure_out_scope`).
 2013-09-02 19:36:16 +03:00
Mihai Bazon
1c6efdae34 Better fix for #286 2013-09-02 11:36:48 +03:00
Mihai Bazon
b0ca896d98 Fix parsing a.case /= 1 
Close #286
 2013-09-02 11:09:54 +03:00
Mihai Bazon
78a217b94c Fix parsing regexp after unary-prefix operator 
++/x/.y

Fix #284
 2013-09-02 09:56:27 +03:00
Mihai Bazon
ed80b4a534 Move support for negate_iife in the compressor, rather than code generator 
(the code generator doesn't maintain enough context to know whether
the return value is important or discarded)

Fixes #272
 2013-08-20 17:45:52 +03:00
Michael Ficarra
d9ad3c7cbf fixes #259: don't unnecessarily quote object properties when --screw-ie8 2013-08-18 19:45:06 -05:00
Mihai Bazon
4c4dc2137c Don't drop unused setter argument. 
Fix #257
 2013-08-07 12:04:58 +03:00
Mihai Bazon
964d5b9aa4 Don't pretend to evaluate lambdas 
Fix #255
 2013-08-04 21:44:17 +03:00
Mihai Bazon
41c627379c Reverting "added option for dropping unused params" 
Revert "added option for dropping unused params"

(turns out we already had the `unused` option for this.)

This reverts commit e54df2226f.
 2013-07-25 18:08:36 +03:00
Dusan Bartos
e54df2226f added option for dropping unused params 2013-07-25 17:37:47 +03:00
Forbes Lindesay
dfa395f6ff Make DefaultsError a real Error object 2013-07-22 01:44:03 +01:00
David Glasser
b1febde3e9 Fix output for arrays whose last element is a hole: [1,,] 
1529ab96 started to do this (by considering holes to be separate from
"undefined") but it still converted
   [1,,]    (length 2, last element hole, trailing comma)
to
   [1,]     (length 1, trailing comma)

Unfortunately the test suite doesn't really make this clear: the new test here
passes with or without this patch because run-tests.js beautifys the expected
output (in "make_code"), which does the incorrect transformation! If you make
some manual change to arrays.js to make the test fail and see the INPUT and
OUTPUT, then you can see that without this fix, [1,,] -> [1,], and with this fix
it stays [1,,].
 2013-07-18 15:39:22 +03:00
Mihai Bazon
193049af19 Revert previous patch, it was no good. 2013-07-15 11:59:23 +03:00
Mihai Bazon
4a0bab0fa3 Add "position" option to parser, to specify initial pos/line/col 
(for parsing embedded scripts)
 2013-07-15 11:27:11 +03:00
Mihai Bazon
9243b0cb9d Apply transformer to AST_VarDef's name 
Fix #237
 2013-07-14 13:24:09 +03:00
Mihai Bazon
fc9ba323c4 Fix typo. 
Close #239
 2013-07-12 09:56:58 +03:00
Mihai Bazon
02a84385a0 Don't swap binary ops when "use asm" is in effect. 
Refs #167
 2013-06-07 12:52:09 +03:00
Ville Lautanala
f29f07aabd Escape null characters as \x00 
Since \0 might be mistakenly interpreted as octal if followed by a
number and using literal null is in some cases interpreted as end of
string, escape null as \x00.
 2013-06-03 20:46:42 +03:00
Mihai Bazon
9fc6796d2a Add negate_iife option to the code generator. 
See discussion in a9511dfbe5
 2013-05-22 21:22:14 +03:00
Mihai Bazon
9fc8a52142 Set "global" on undeclared SymbolDef-s 2013-05-22 13:08:19 +03:00
Mihai Bazon
22a038e6a2 Fix output of statement: new function(){...}; 
Close #209
 2013-05-20 08:27:37 +03:00
Mihai Bazon
ca3388cf5a Add --expr, an option to parse a single expression (suitable for JSON) 2013-05-15 13:27:23 +03:00
Mihai Bazon
caa8896a8a Only compress code in new Function if all arguments are strings. 2013-05-14 18:36:31 +03:00
Mihai Bazon
f64539fb76 Compress code passed to new Function if it's a constant. 
Only for `--unsafe`.

Close #203
 2013-05-14 10:47:06 +03:00
Mihai Bazon
d56ebd7d7b Fix a["1_1"] 
Close #204
 2013-05-14 10:42:34 +03:00
Mihai Bazon
a9511dfbe5 Use the negation hack rather than parens for a toplevel function expression call 
(only in !beautify mode)
 2013-05-09 08:58:47 +03:00
Mihai Bazon
064e7aa1bb Fix is_assignable 
(not likely to be noticed, it's only used in `strict` parse mode)
 2013-05-09 08:44:24 +03:00
Mihai Bazon
11e24d53a1 Fix property names 
Close #199
 2013-05-08 22:37:48 +03:00
Mihai Bazon
a6ed2c84ac Better fix for equality of typeof ... against "undefined" 2013-05-08 16:22:48 +03:00
Justin Lau
a1958aad56 Fixed typeof undefined optimization and updated related test case to 
accomodates the sort behaviour changes made in commit
mishoo/UglifyJS2@aebafad41e.
Signed-off-by: Justin Lau <justin@tclau.com>
 2013-05-08 16:22:48 +03:00
Justin Lau
9af2bbffde Fixed dot properties not optimizing unicode identifiers. Signed-off-by: Justin Lau <justin@tclau.com> 2013-05-07 14:20:19 +03:00
Justin Lau
1e3bc0caa0 Fixed dot property issue with invlid identifier names. 
Signed-off-by: Justin Lau <justin@tclau.com>
 2013-05-05 22:27:43 +08:00
Mihai Bazon
9794ebf88c Workaround for missing prefix in UnaryExpression generated by Esprima 
See #193
 2013-04-29 15:03:52 +03:00
Michael Ficarra
5af144522a fixes #189: use dotted member access when --screw-ie8 option given 2013-04-20 15:11:05 -05:00
Roman Bataev
4b818056cf Fix typeof evaluation for regex and function 2013-04-03 22:34:38 -04:00
Vladimir Zhuravlev
37d7cb8565 Quote objects with numeric keys 2013-03-31 19:52:28 +03:00
Mihai Bazon
a869b854fa Don't use \xYY for identifiers 
Fix #173
 2013-03-31 13:36:22 +03:00
Andreas Lind Petersen
81f5efe39a Output, to_ascii: Escape non-ascii chars with \xnn instead of \unnnn whenever possible. 2013-03-31 13:36:22 +03:00
Michał Gołębiowski
75f0bbe6e8 renamed --screw-ie to --screw-ie8, documented it in README.md, indicated it doesn't break IE9+ 2013-03-25 17:03:21 +01:00
Jake Harding
478bf4dbdd Add support for enclose option. Closes #139. 2013-03-24 11:11:23 +02:00
Mihai Bazon
e0f67baf2d Don't print the warning on parse error, just throw a JS_Parse_Error. 
Fix #159
 2013-03-24 00:57:35 +02:00
Mihai Bazon
b14d3df3d2 Keep legit code working even when --screw-ie is not passed. 
Previously:

    Without `--screw-ie`, UglifyJS would always leak names of function
    expressions into the containing scope, as if they were function
    declarations.  That was to emulate IE<9 behavior.  Code relying on this
    IE bug would continue to work properly after mangling, although it would
    only work in IE (since other engines don't share the bug).  Sometimes
    this broke legitimage code (see #153 and #155).

    With `--screw-ie` the names would not be leaked into the current scope,
    working properly in legit cases; but still it broke legit code when
    running in IE<9 (see #24).

Currently:

    Regardless of the `--screw-ie` setting, the names will not be leaked.
    Code relying on the IE bug will not work properly after mangling.
    <evil laughter here>

    Without `--screw-ie`: a hack has been added to the mangler to avoid
    using the same name for a function expression and some other variable in
    the same scope.  This keeps legit code working, at the (negligible,
    indeed) cost of one more identifier.

    With `--screw-ie` you allow the mangler to name function expressions
    with the same identifier as another variable in scope.  After mangling
    code might break in IE<9.

Oh man, the commit message is longer than the patch.

Fix #153, #155
 2013-03-22 18:04:46 +02:00
Mihai Bazon
9b1a40dfc3 Support mangling toplevel names 
Close #127
 2013-03-13 09:44:06 +02:00
Mihai Bazon
e4b078cff7 Disable unsafe by default 
Close #147
 2013-03-11 00:04:31 +02:00
Mihai Bazon
aebafad41e Fix reordering comparisons 
Close #143
 2013-03-04 10:06:01 +02:00
Mihai Bazon
26746ce316 Add --screw-ie option 
For now the implication is that UglifyJS will not leak a function
expression's name in the surrounding scope (IE < 9 does that).

(ref. mishoo/UglifyJS#485)
 2013-03-02 14:28:34 +02:00
Mihai Bazon
dac6efb43d Drop last default: if it's the last branch and empty 
Close #141
 2013-03-01 13:12:03 +02:00
Mihai Bazon
8880f4824c Compress boolean constants after evaluation 
Close #137
 2013-03-01 10:26:06 +02:00
Mihai Bazon
3a591c43fe Fix compressing do {...} while (false) 
It's not safe to transform it to {...} because the body might contain
`break`.  The solution could be more elaborate (detect if body contains
`break`) but I don't think it's worth the trouble.

Close #129
 2013-02-19 18:12:19 +02:00
Mihai Bazon
916faf0a48 Force space after literal regexp when used in "instanceof" or "in" 
Close #118
 2013-02-06 11:57:59 +02:00
Mihai Bazon
f36e4e9a78 Give up evaluating (unary-prefix '-' 0) 
Close #117

------

    JS, WHY YOU SUCK SO BADLY? ;-(
 2013-02-06 11:51:09 +02:00
Mihai Bazon
fdf8b5eb71 Fix parens for NaN 
Close #116
 2013-02-06 11:38:29 +02:00
Mihai Bazon
de7ec7f1b7 Fix parens for negative numbers 
Close #115
 2013-02-06 11:36:04 +02:00
Mihai Bazon
3c8a0bdff4 Fix parens for AST_New 
Close #114
 2013-02-06 11:28:49 +02:00
Mihai Bazon
9e8ba27dcd Fix handling of constants 
Close #113
 2013-02-06 11:15:31 +02:00
Mihai Bazon
719a8fd102 Ugly hack to print comments before return/throw statements 
Close #112
 2013-02-05 19:11:39 +02:00
Mihai Bazon
a5b209470c Fix end token for Assign nodes 2013-02-01 13:32:15 +02:00
Richard Gibson
522566ea80 Fix #105: property comparison to undefined is not always safe 2013-01-23 23:52:04 -05:00
Mihai Bazon
faa354f5ca [AST_Hole] the print function can be a no-op. 2013-01-17 11:36:10 +02:00
David Glasser
1529ab965a Fix output for arrays containing undefined values. 
1b6bcca7 was a first attempt at this. That commit made Uglify stop replacing
holes with undefined, but instead it started replacing undefined with
holes. This is slightly problematic, because there is a difference between a
hole and an undefined value. More problematically, it changed [1,undefined] to
[1,] which generally doesn't even parse as a hole (just as a trailing comma), so
it didn't even preserve the length of the array!

Instead, parse holes as their own special AST node which prints invisibly.
 2013-01-17 11:36:10 +02:00
Mihai Bazon
f0909bdc8f Handle String() with no arguments. 
Fix #91
 2013-01-17 11:01:38 +02:00
Mihai Bazon
6b14f7c224 Fix handling of labels in nested scopes 2013-01-04 14:17:33 +02:00
Mihai Bazon
83a4ebfedc Implement -m sort=true 
close #83
 2013-01-02 12:39:00 +02:00
Mihai Bazon
9916d0e547 Accept string or number as name of an accessor. 
[not sure I'm happy about this fix]

Reference mishoo/UglifyJS#478
 2012-12-22 01:24:04 +02:00
Mihai Bazon
31c4a37e37 Optimize new Array(1, 2, 3) → [1, 2, 3] 
Close #74
 2012-12-21 21:04:35 +02:00
Mihai Bazon
08219f0cee Fix output when semicolons is off. 
(need to force a semicolon for the empty body of an `if`)

Close #72
 2012-12-21 11:57:08 +02:00
Mihai Bazon
c4993e1e5c Small cleanup 2012-12-12 11:51:55 +02:00
Mihai Bazon
98978fc827 Add proper parens in "NoIn" expressions. 
fix #60.
 2012-12-06 12:27:57 +02:00
Mihai Bazon
16430acc1f small improvement on merging assignments into hoisted vars 2012-12-05 13:14:49 +02:00
Mihai Bazon
320c110b33 When hoisting variables, try to merge in assignments that follow. 2012-12-05 12:30:25 +02:00
Mihai Bazon
5cc90db7d0 Don't messup compressor stack while optimizing Switch 
Fix #59
 2012-11-30 11:16:09 +02:00
Mihai Bazon
13c4dfcabd fix #55 2012-11-24 10:02:08 +02:00
Mihai Bazon
4f555e2232 fix for https://github.com/mishoo/UglifyJS/issues/474 2012-11-23 10:20:00 +02:00
Mihai Bazon
089ac908b7 fix #51 2012-11-18 17:37:45 +02:00
Mihai Bazon
0d3fd2ef30 retain (1,eval) as is when it's the expression of an AST_Call 
otherwise we change the meaning of eval from global to lexical.
 2012-11-17 12:05:31 +02:00
Richard van Velzen
e98119496a Add support for somewhat preserving line numbers. 
Usage: uglifyjs2 -b "beautify=0,preserve_line=1" /path/to/js

ref #46
 2012-11-14 15:30:18 +02:00
Mihai Bazon
bdfcbf496b better solution for the last test in constant switch folding 2012-11-14 12:21:43 +02:00
Mihai Bazon
dba8da4800 optimize constant switch blocks 
ref. mishoo/UglifyJS#441
 2012-11-14 12:06:07 +02:00
Mihai Bazon
60c0f40250 Merge branch 'optimize_concat' of https://github.com/rvanvelzen/UglifyJS2 into rvanvelzen-optimize_concat 2012-11-13 14:38:55 +02:00
Mihai Bazon
e02771a5f2 don't change order in binary expressions if both operands have side effects 2012-11-13 14:32:07 +02:00
Richard van Velzen
f96f796f71 Add simple optimization for empty-string concats. 
ref. #43
 2012-11-12 15:41:03 +01:00
Mihai Bazon
53355bdb24 fix invalid AST produced by dropping unused variable 
close #44
 2012-11-12 13:23:57 +02:00
Dan Wolff
b49230ab8d convert x.toString() to ""+x instead of x+"" 
In some places this can save one byte in whitespace, e.g. after return.
Example:

function f(arg) {
        // return""+arg - no space between return and ""
        return arg.toString();
}
 2012-11-11 15:53:34 +02:00
Mihai Bazon
1e5e13ed81 AST_LabelRef no longer inherits from AST_SymbolRef 2012-11-08 15:39:14 +02:00
Mihai Bazon
e312c5c2a7 fix API breakage 
close #36, #38
 2012-11-08 12:31:28 +02:00
Mihai Bazon
1a5fd3e052 optimization for if/break as first statement in a loop body 
for(...; x; ...) if (y) break; → for(...; x&&!y; ...);

similarly for `while` and some combinations (i.e. the `break` appears in the
`else` clause, etc.)
 2012-11-08 11:43:14 +02:00
Mihai Bazon
46be3f2bf1 fix another small regression 
we do need parens here: `new (foo.bar().baz)`, but not here: `new foo.bar.baz`
 2012-11-07 13:31:43 +02:00
Mihai Bazon
80da21dab4 fix regression from 5346fb94 (shouldn't parenthesize i++ in x[i++]) 2012-11-07 13:02:51 +02:00
Mihai Bazon
5276a4a873 add AST_Accessor and AST_SymbolAccessor node types 
AST_Accessor will represent the function for a setter or getter.  Since they
are not mangleable, and they should not introduce a name in scope, we have a
new node for their name (AST_SymbolAccessor) which doesn't inherit from
AST_SymbolDeclaration.

fix #37
 2012-11-07 12:43:27 +02:00
Mihai Bazon
a1ae0c8609 parenthesize property access when it's the expression in New 
refs #35
 2012-11-07 12:26:33 +02:00
Mihai Bazon
a90c1aeafe further fix for parens around New (refs #35) 2012-11-07 11:49:06 +02:00
Mihai Bazon
ff388a8d2d parenthesize a Call expression when its parent is New 
fix #35
 2012-11-07 11:36:15 +02:00
Mihai Bazon
5346fb94bb add proper parens around unary expressions 
fix #34
 2012-11-07 11:23:50 +02:00
Mihai Bazon
a4f6d46118 add option to mangle names even if eval/with is in use 
(for more fair comparison to Closure compiler)
 2012-11-06 18:19:51 +02:00
Mihai Bazon
ffccb233e5 convert while into for 2012-11-05 16:01:20 +02:00
Mihai Bazon
fba0c1aafe minor 2012-11-05 16:01:09 +02:00
Mihai Bazon
774f2ded94 minor optimization 
for `==` or `!=` against a constant, prefer to display the constant first.
should help a bit after gzip, i.e.:

    typeof foo=="undefined"
    ^^^^^^    ^^^^^^^^^^^^^

vs:

    "undefined"==typeof foo
    ^^^^^^^^^^^^^^^^^^^     (longer sequence that could repeat)

idea stolen from closure.
 2012-11-05 13:13:06 +02:00
Mihai Bazon
85af942d64 print final semicolon 
close #28
 2012-11-05 13:09:39 +02:00
Mihai Bazon
8413787efc use a Dictionary object instead of plain object for hashes 
to mitigate the `__proto__` issue

related to #30
 2012-11-02 10:58:45 +02:00
Mihai Bazon
cf409800be it's safe to negate expression in !EXP only in boolean context 
#kendo
 2012-11-01 15:49:05 +02:00
Mihai Bazon
18270dd9f3 added unsafe_comps for negating <= with > 
since it has the potential to break code, let's keep it disabled by default
 2012-11-01 15:14:56 +02:00
Mihai Bazon
d4c25c571b fix compressing UnaryPrefix 
only try negating the expression if the operator is `!`

#kendo
 2012-11-01 13:35:08 +02:00
Mihai Bazon
abe0ebbf02 don't move expressions containing the binary in operator into the for initializer 
(opera can't parse it)

close #25
 2012-10-30 14:50:47 +02:00
Mihai Bazon
cb3cafa14d cripple scope to make IE happy :-( 
close #24
 2012-10-25 18:52:35 +03:00
Mihai Bazon
70fd2b1f33 fix for if (...) return; else return ...; 
(it was assumed that the first `return` always contains a value)

close #22
 2012-10-24 09:33:32 +03:00
Mihai Bazon
30faaf13ed more sequence optimizations (lift some sequences above binary/unary expressions so that we can avoid parens) 2012-10-22 11:58:06 +03:00
Mihai Bazon
fc8314e810 minor fix for dropping unused definitions. 
function f(x, y) {
        var g = function() { return h() };
        var h = function() { return g() };
        return x + y;
    }

now compresses to `function f(x, y) { return x + y }`
 2012-10-19 12:57:29 +03:00
Mihai Bazon
afb7faa6fa more optimizations for some break/continue cases 2012-10-18 15:14:57 +03:00
Mihai Bazon
253bd8559b more small optimizations 
(unlikely to help for hand-written code)
 2012-10-17 21:57:08 +03:00
Mihai Bazon
6a099fba66 define aborts on AST_If: true if both branches abort 2012-10-17 16:17:14 +03:00
Mihai Bazon
a21f3c6cdd employ a better parser for command-line arguments 
to support passing commas in strings in for example:

    uglifyjs2 -cd TEST="'a,b'" <<EOF
    console.log(TEST);
    EOF

    → console.log("a,b")

close #14
 2012-10-17 15:56:45 +03:00
Mihai Bazon
8f66458598 the sort option is broken anyway, removed it 
we need to mangle names from outermost to innermost scope; mangling names
from inner scopes before we got to the outer scope won't work correctly,
therefore sorting doesn't make sense.
 2012-10-17 15:24:47 +03:00
Mihai Bazon
6472f9410e add semicolons option in the code generator (default: true) 
pass `false` to separate statements with newlines instead of semicolons
 2012-10-17 14:52:08 +03:00
Mihai Bazon
8957b3a694 fix small glitches in source map generation 2012-10-16 15:54:12 +03:00
Mihai Bazon
fcc0229087 drop unused function arguments 
also add test for "drop_unused" (the last one fails for now)
 2012-10-13 15:04:44 +03:00
Mihai Bazon
b071c9d079 add parens to AST_Seq whose parent is AST_Unary 2012-10-13 14:32:08 +03:00
Mihai Bazon
851b48e4a3 fix compressing benchmark.js (it tried to evaluate a statement) 
the following code in benchmark.js triggered the issue:

    support.decompilation = Function(
      'return (' + (function(x) { return { 'x': '' + (1 + x) + '', 'y': 0 }; }) + ')'
    )()(0).x === '1';

technically that could be resolved into a constant expression, but seems
it's being used here for browser bugs detection :-\
 2012-10-13 12:57:10 +03:00
Mihai Bazon
708abb1ab1 minor 2012-10-13 12:42:01 +03:00
Mihai Bazon
370d3e0917 fix regression from fb5c01c073 
is_digit takes a char code now, not a string
 2012-10-13 12:24:27 +03:00
Mihai Bazon
b51fe0dcc3 fix end tokens in spidermonkey ast import 2012-10-13 11:37:58 +03:00
Mihai Bazon
8149be551e minor 2012-10-12 14:55:54 +03:00
Mihai Bazon
1b6f8d463f remove the $self hack 
operations are destructive anyway, so there's no point to clone the nodes in
the transformer.  speed++
 2012-10-12 11:07:35 +03:00
Mihai Bazon
72cb5328ee fix in_boolean_context() (two tests were broken) 2012-10-12 10:49:41 +03:00
Mihai Bazon
fc39553714 use AST_Lambda for object setters/getters 
so that the optimization that drops the name if unused doesn't apply.
close #12
 2012-10-12 10:11:01 +03:00
Mihai Bazon
d9d67317b1 fix pos in syntax error exception 2012-10-11 15:25:38 +03:00
Mihai Bazon
fb5c01c073 stealing more hacks from acorn in the name of speed 2012-10-11 15:17:42 +03:00
Mihai Bazon
f4584af42c using makeComparator from acorn to generate functions that tests whether a 
string is keyword, reserved etc.

speeds up the parser a bit, though not spectacular.. still far from acorn.
 2012-10-11 11:52:05 +03:00
Mihai Bazon
172aa7a93c cleanup 
- use prototype-less objects where feasible (minor speed improvement)
- get rid of HOP
 2012-10-11 11:07:42 +03:00
Mihai Bazon
5053a29bc0 fix propagation of symbol references 2012-10-11 10:28:48 +03:00
Mihai Bazon
9cdaed9860 fix node name 2012-10-10 23:16:40 +03:00
Mihai Bazon
dacce1b1fa seems cleaner if AST_Label doesn't inherit from AST_SymbolDeclaration 2012-10-10 11:37:51 +03:00
Mihai Bazon
f26f3b44bc small improvements in wrap_commonjs: 
- use MAP.splice instead of a BlockStatement to inject code (avoids some
  warnings in the linter)
- use the original symbol in exports, so that we get the proper source mapping
 2012-10-10 11:28:05 +03:00
Mihai Bazon
c5ecbfc756 drop unused variable 2012-10-10 11:27:06 +03:00
Mihai Bazon
3799ac8973 add --lint and display {file} in scope_warnings 2012-10-10 11:26:59 +03:00
Mihai Bazon
86182afa7f minor 2012-10-09 22:56:59 +03:00
Mihai Bazon
a84d07e312 add AST_Infinity node 2012-10-09 18:35:53 +03:00
Mihai Bazon
88beddfa91 make --comments keep @cc_on too 2012-10-09 18:25:00 +03:00
Mihai Bazon
1b0aab2ce9 added $propdoc to AST nodes and some cleanups 
hopefully we can make the AST documentation self-generating
 2012-10-09 18:20:39 +03:00
Mihai Bazon
9ead49641d minor AST cleanup (AST_BlockStatement may inherit from AST_Block) 2012-10-09 13:59:17 +03:00
Mihai Bazon
e1862cd36f add --ast-help 
displays a rather cruel description of the AST classes, derived
directly from the node definitions.
 2012-10-09 13:21:21 +03:00
Mihai Bazon
2c025f23db fix detecting symbols in use 2012-10-09 13:13:55 +03:00
Mihai Bazon
d4970b35ac should not expose base54.sort() in the API docs, I think 2012-10-08 13:37:27 +03:00
Mihai Bazon
dd8286bce1 added --self to easily get a browser-runnable version of UglifyJS 2012-10-08 12:55:18 +03:00
Mihai Bazon
093a9031dc eliminate redundant directives in the same scope 2012-10-08 12:53:17 +03:00
Mihai Bazon
80a18fe2fa for certain nodes that we invent we might not have a original source file to 
map from, so just use "?".  and in any case, don't fail hard when addMapping throws.
 2012-10-08 12:52:25 +03:00
Mihai Bazon
455ac5435d remove unused code 2012-10-05 22:59:05 +03:00
Mihai Bazon
4a2b91220a minor 2012-10-05 20:24:56 +03:00
Mihai Bazon
a1e0885930 replace (function(){ ...no side effects ... })() with undefined. 2012-10-05 16:51:16 +03:00
Mihai Bazon
7ae09120ed prevent mangling only when eval is *called*, not when it's just referenced 2012-10-05 16:17:31 +03:00
Mihai Bazon
ecd9f21467 fixed import of locations from SpiderMonkey AST 2012-10-05 15:05:06 +03:00
Mihai Bazon
a9b6f9909a use the appropriate constructor for symbols 2012-10-04 17:28:35 +03:00
Mihai Bazon
708ec0467c minor 2012-10-04 17:28:09 +03:00
Mihai Bazon
682a58a1f5 removed some unused variables 2012-10-04 08:49:18 +03:00
Mihai Bazon
f20c251882 moving code around 2012-10-03 21:39:47 +03:00
Mihai Bazon
2bd8a118c2 define AST_Node.from_mozilla_ast(ast) 
returns an UglifyJS2 AST given a Mozilla AST.  Still needs some work to do
(need to create specific nodes like AST_SymbolRef, AST_SymbolLambda
etc. instead of base AST_Symbol, in order for the mangler/compressor to work
properly)
 2012-10-03 20:03:17 +03:00
Mihai Bazon
11863d6f9a more cleanup (dropped AST_SwitchBlock) 2012-10-03 15:52:31 +03:00
Mihai Bazon
3412498795 AST cleanup (dropped AST_StatementBase) 2012-10-03 15:41:11 +03:00
Mihai Bazon
c11de17e99 added option for side-effect-free statements, fix test 2012-10-03 13:08:03 +03:00
Mihai Bazon
e0f5075e45 fix endless loop in tests 2012-10-03 12:49:47 +03:00
Mihai Bazon
0678ae2076 fix for a = !b && !c && !d && !e → a=!(b||c||d||e) 2012-10-03 11:34:05 +03:00
Mihai Bazon
378ed17809 disable hoist_vars by default and change comparations to comparisons 2012-10-03 11:27:05 +03:00
Mihai Bazon
815abcfe18 support for --comments option to keep comments containing @license or @preserve 2012-10-02 16:40:42 +03:00
Mihai Bazon
075f93ec0d line numbers start at 1 2012-10-02 16:39:53 +03:00
Mihai Bazon
2a5456260e added option to keep some comments in the output 2012-10-02 14:32:30 +03:00
Mihai Bazon
36be211e99 option to exclude certain names from mangling 2012-10-02 14:02:33 +03:00
Mihai Bazon
dde5b22b5e support defines 2012-10-02 13:20:07 +03:00
Mihai Bazon
e1098b04a7 "use strict"; 2012-10-02 12:45:58 +03:00
Mihai Bazon
211792757c more constant folding (for names defined with const) 2012-10-02 12:45:17 +03:00
Mihai Bazon
347160c631 add AST_SymbolConst for names defined with const 2012-10-02 12:22:39 +03:00
Mihai Bazon
ff696cd7bc drop more unused names 2012-10-02 12:02:33 +03:00
Mihai Bazon
9e5dd81f1e a shy attempt to obey width in the beautifier; added bracketize option to always print brackets around if/do/while/for statements; export more options via the CLI 2012-10-02 11:22:38 +03:00
Mihai Bazon
896444482a minor 2012-09-28 11:12:47 +03:00
Mihai Bazon
05e15b1c0c fix mangling 
(bug in our code prevented the mangler from using a name that was in use
prior to mangling but not after it)
 2012-09-27 00:01:16 +03:00
Mihai Bazon
13278c6649 removed the "squeeze" method (it's now effectively "transform") 2012-09-26 19:52:32 +03:00
Mihai Bazon
15d58f5917 some speedup and more savings from unused vars that have side effects in initialization 2012-09-26 19:05:49 +03:00
Mihai Bazon
78be8f5296 compressor successfully moved to TreeTransformer 2012-09-26 14:27:01 +03:00
Mihai Bazon
a24e7ee976 checkpoint (refactoring, WIP) 2012-09-26 12:16:16 +03:00
Mihai Bazon
242dd10131 more cleanups 2012-09-25 20:39:15 +03:00
Mihai Bazon
9321d418bc moving code around (refactoring, WIP) 2012-09-25 15:59:27 +03:00
Mihai Bazon
10c7f52074 discard all \uFEFF characters (https://github.com/mishoo/UglifyJS/issues/462) 2012-09-25 15:30:59 +03:00
Mihai Bazon
4201577dd7 started some refactoring (WIP) -- moving squeezer to TreeTransformer 2012-09-25 15:15:47 +03:00
Mihai Bazon
e836e2ae5f minor 2012-09-25 12:48:36 +03:00
Mihai Bazon
ea6d1ea701 it's not safe to assume that property access is side-effect-free 
(getters/setters + various browser bugs will trigger side effects; also, an
exception is thrown when the expression is undefined)
 2012-09-25 10:32:14 +03:00
Mihai Bazon
368ac8f93c some boolean cleanup 2012-09-25 10:31:03 +03:00