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817 Commits

Author SHA1 Message Date
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