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965 Commits

Author SHA1 Message Date
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
alexlamsl
80f3ad3ce0 Merge branch 'master' into harmony-v2.8.4 2017-03-02 11:16:55 +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
alexlamsl
8a7a4749c7 Merge branch 'master' into harmony-v2.8.2 2017-03-01 11:06:33 +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
alexlamsl
478aaab469 fix parser test 
not sure if `start.pos` is correct, but oh well
 2017-02-28 14:08:31 +08:00
kzc
a0eaff750d fix parsing of arrow function with bind 
fixes #1510
 2017-02-28 02:47:33 +08:00
alexlamsl
57777b6cfa Merge branch 'master' into harmony-2.8.0 2017-02-28 02:28:58 +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
kzc
8d205f7f39 fix parser handling of comments 2017-02-27 14:54:47 +08:00
alexlamsl
c59bf5e8d8 fix SymbolDef.global 
properly compute for top-level block-variables
 2017-02-27 06:20:08 +08:00
alexlamsl
d2d3a6e065 fix double-descend() 
for `AST_Export` in `AST_Toplevel.figure_out_scope()`
 2017-02-27 06:06:09 +08:00
alexlamsl
7755733716 fix "Starting destructuring." 
commit 32f76f7ff does not take into account `AST_SymbolFunarg` is also `AST_SymbolVar`, so don't need to call `AST_Scope.def_variable()` twice
 2017-02-27 05:30:18 +08:00
alexlamsl
b3a987b0df fix up drop_unused() 2017-02-27 05:11:01 +08:00
alexlamsl
88a338f29e Merge branch 'master' into harmony-2.8.0 2017-02-27 04:37:48 +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
Anthony Van de Gejuchte
07734b000a Destructuring consistency fixes (#1417) 
- Use AST_Destructuring for lhf assignment patterns
- Use AST_DefaultAssign for default assignments
- Add more checks for lhs expressions
- Add lots of testing
- Cleanup ast (e.g. remove default property)
- Fix #1402 based on a patch from @kzc
- Refine spread allowance in array destructring pattern
- Add destructuring AST tree checker
 2017-02-24 08:49:19 +08:00
Anthony Van de Gejuchte
85c1cba760 Remove duplicated code (#1456) 
[ES6] Remove duplicated code
 2017-02-24 08:48:13 +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
Richard van Velzen
4bd31607f6 Merge branch 'master' into harmony 2017-01-26 13:02:22 +01:00
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
Anthony Van de Gejuchte
4728bc73ad Allow parsing regexp after arrow token (#1439) 2017-01-26 12:06:46 +01:00
alexlamsl
48284844a4 add missing LHS cases which global_defs should avoid 2017-01-19 21:06:28 +01:00
Anthony Van de Gejuchte
52ce9a333c Fix compression with unused containing destructuring 2017-01-19 21:04:28 +01:00
kzc
abbeb266b5 [ES6] output parens for yield when parented by AST_Dot or AST_Sub (#1419) 2017-01-19 17:15:59 +01:00
Anthony Van de Gejuchte
b11c5151bc Fix regression with non-ascii function identifiers 
Regression since 110a1ac885
 2017-01-19 16:47:37 +01:00
Richard van Velzen
ee26e7f11b Merge branch 'master' into harmony 2016-11-29 20:50:27 +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
Anthony Van de Gejuchte
1b2c02c944 Fix nlb property for template strings tokens starting with nlb 
Also add .gitattributes to checkout lf eol style
 2016-11-29 20:36:00 +01:00
Anthony Van de Gejuchte
0aa526e72c Do not allow arrow functions in the middle of an expression 2016-11-29 20:32:05 +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
c2112d5886 Fix case where a lonely var is used as computed property 2016-11-29 20:19:01 +01:00
Anthony Van de Gejuchte
5f6825f9ec Introduce is_block_scope to AST_Node to determine block scope. 
Will return false if AST_Node is instance of AST_Scope for now.
 2016-10-24 21:28:32 +02:00
Anthony Van de Gejuchte
7e80a979a7 Remove AST_ObjectComputedKeyVal 2016-10-23 22:12:30 +02:00
Richard van Velzen
b7bb706150 Merge branch 'master' into harmony 2016-10-23 22:11:27 +02:00
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
Anthony Van de Gejuchte
32c2cc33bb Improve binding patterns for arrow functions 2016-10-23 21:13:12 +02:00
Anthony Van de Gejuchte
947b8750e8 Make classes implicitly strict mode 2016-10-17 20:24:38 +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
kzc
88f6ff38d1 [ES6] fix template string escaping of \${...} 2016-10-01 11:32:36 +02:00
kzc
4198095a9c [ES6] fix parsing spread arguments that are expressions 2016-09-29 13:34:22 -04:00
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
Anthony Van de Gejuchte
13ed445607 Improve support for binding pattern 
Including improvements for parameters, variable assignment and
catch parameter.
 2016-09-05 17:48:48 +02:00
Richard van Velzen
1db50c3b16 Don't parenthesize arrow functions in parameter lists 2016-09-02 09:35:31 +02:00
kzc
25fc02743a Account for side effects in string + expr optimization 2016-09-01 09:24:56 -04:00
Richard van Velzen
7f6b5d662b Merge branch 'master' into harmony 2016-08-30 15:16:23 +02:00
kzc
0bd8053524 implement optimization: (x = 2 * x) ---> (x *= 2) 2016-08-30 08:43:02 -04:00
Anthony Van de Gejuchte
1c15d0db45 Fix quoting of properties 
- Make AST_ConciseMethod child of AST_ObjectProperty.
- Fix some typos.
 2016-08-26 15:06:24 +02:00
Richard van Velzen
45d81f881b Merge branch 'master' into harmony 2016-08-17 20:21:38 +02:00
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
Richard van Velzen
8c7d23dfb1 Merge branch 'master' into harmony 2016-08-17 08:50:31 +02:00
kzc
d854523783 Fix negate_iife regression #1254 2016-08-17 01:29:34 -04:00
Richard van Velzen
c644c1292d Merge branch 'master' into harmony 2016-08-15 09:09:04 +02:00
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
d224d71b8d [ES6] Fix handling of semicolons in export parse. 2016-08-14 21:43:24 +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
27d3669800 Don't allow escaped surrogated identifiers + introduce ascii_identifiers 
Don't use 2 characters for surrogates in identifiers because there is
support for the \u{} syntax when escaped identifiers were introduced.

Also catch eof errors while reading identifier names

Introduce ascii_identifiers:

By setting ascii_identifiers to undefined (default value),
ascii_identifiers will print identifiers using the same setting as
ascii_only within the limits of the ecmascript 6 grammar.

ascii_identifiers accept true and false, allowing identifiers to be
printed under different settings than strings with the ascii_only setting.
 2016-08-14 21:36:06 +02:00
Anthony Van de Gejuchte
110a1ac885 Make distinction between * method and * operator 
Also add quotes to properties when necessary,
this might be the case if the name isn't a valid
identifier
 2016-07-29 21:31:08 +02:00
Anthony Van de Gejuchte
3f8fc3a316 Fix computed getters + cleanup AST 2016-07-21 18:21:46 +02:00
Anthony Van de Gejuchte
88384cf351 Add more globals, whereof most defined after es5.1 
Also do not pollute env with mocks replacing standard globals
 2016-07-21 16:52:04 +02:00
Anthony Van de Gejuchte
72a9d799b6 Various property fixes 
* Implement getter/setter with computed value
* Fix parsing getter/setter after static or generator token
* Allow storing expressions for computed expression in AST_SymbolMethod
* Allow get and set in shorthand properties in object literals

Fixes #1094, #1146 and #1221
 2016-07-21 16:50:32 +02:00
Anthony Van de Gejuchte
642273c290 Legacy octal integer strict mode fixes 2016-07-21 14:42:16 +02:00
Anthony Van de Gejuchte
766fafda8b Don't remove empty generators passed as parameter 2016-07-19 18:13:07 +02:00
kzc
842ac27efb [ES6] Get compress and global_defs working for AST_Class 2016-07-17 19:56:02 +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
0af42d1831 Template fixes 
* Fixes #1147: template strings not obeying -b ascii_only true
* Allow evaluation of template expressions by adding optimizers and
  walkers
* Make sure tagged templates are never changed
* Remove template tokenizer in parser, add template tokenizer in
  tokenizer. It is using a brace counter to track brace position of
  templates
* Add tokens `template_head` and `template_substitution` but parsing
  tokens stays mostly the same
* Do not output strings anymore in AST_TemplateString, instead use
  AST_TemplateSegment
* Fix parsing tagged templates, allowing multiple templates behind
  as spec allows this

These changes don't influence tagged templates because raw content
may influence code execution, however they are safe to do in normal
templates:
* Allow basic string concatenation of templates where possible
* Allow custom character escape style similar to strings, except in
  tagged templates

Note that expressions are still compressed in tagged templates.

Optional things that may be improved later:
* Custom quote style for templates if it doesn't have expressions.
  Making it obey the quote_style option if this is the case.
 2016-07-17 00:36:42 +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
ff7f6139ba Improve multi-line comment parsing 
* Make sure comments are skipped correctly with surrogates
* Fix regression in multiline comments with nlb
 2016-07-12 00:08:35 +02:00
Richard van Velzen
0db7caf13b Merge branch 'master' into harmony 2016-07-03 21:39:00 +02:00
Anthony Van de Gejuchte
d9bc6f303c Fix output arrow function with 1 param with default value 
Fixes #1090
 2016-07-03 21:37:53 +02:00
Anthony Van de Gejuchte
6fd9b338dd Merge branch 'master' into harmony 2016-07-03 21:35:00 +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
Anthony Van de Gejuchte
d8d4e71b9e Fix uses_with/uses_eval/directives state in block scope 2016-07-01 15:43:17 +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
fb2f8d1a51 Add reserved words to list unescapable keywords 
Additionals:
* Update list reserved keywords
 2016-06-30 22:47:44 +02:00
Anthony Van de Gejuchte
54a783ba84 Add ecma5 flag for codegen 2016-06-30 22:47:44 +02:00
Anthony Van de Gejuchte
63c432f4fa Extend unicode support 
* Support \u{xxxx} syntax
 * Add support for surrogate pairs
 * Allow identifiers to have unicode escape sequence
 2016-06-30 22:47:44 +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
Anthony Van de Gejuchte
07785d0003 Throw error if new.target is like new.foo 2016-06-25 19:32:53 +02:00
Anthony Van de Gejuchte
6eaeb19a4a Add exponentiation operator 2016-06-22 12:23:37 +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
2246c79318 Merge branch 'master' into fix-harmony 2016-06-20 19:21:25 +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
Anthony Van de Gejuchte
dda58244b6 Fixes to prevent failing tests after merging master 
* Add missing quote properties to AST_ObjectKeyVal
 * Avoid test results being interpret as directives
 2016-06-20 15:02:09 +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
ca04508cd1
Restrict yield outside generators in strict mode 
* Move some yield/generic tests from compress/harmony.js to
  compress/yield.js
 * Adjust error messages to conform ecmascript standards
 2016-06-19 21:03:36 +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
6b03b800b3
Only last parameter between parentheses can have spread 2016-06-19 20:51:29 +02:00
Anthony Van de Gejuchte
f9cab7ad61
Allow expand in array literals 2016-06-19 20:49:18 +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
Richard van Velzen
0a3d780327 Merge branch 'master' into harmony 2016-06-12 17:29:42 +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
b0555a123a Fix newline handling after yield 
YieldExpressions can only be defined as:
 * `yield`
 * `yield` [no nlb] AssignmentExpression
 * `yield` [no nlb] `*` AssignmentExpression
 2016-06-11 21:41:16 +02:00
Richard van Velzen
fa29344781 Merge branch 'master' into harmony 2016-06-09 22:29:52 +02:00
Anthony Van de Gejuchte
dcfc514c38 Improve yield support and restrict usage of strict 
- Partially reverting 91cdb93e57 and eaf3911c31 and reimplement
- Add generators support for objects and classes
- Only classes can have static methods so restrict use of it

Special thanks to @rvanvelzen and @kzc for reviewing this patch and
providing constructive feedback over and over again.
 2016-06-09 22:22:15 +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
Anthony Van de Gejuchte
8ad8d7b717 Add Symbol to builtins 2016-05-24 17:57:18 +02:00
Richard van Velzen
0357e5923f Merge branch 'master' into harmony 2016-05-24 17:56:20 +02:00
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
Richard van Velzen
f63803e3e3 Merge branch 'master' into harmony 2016-05-16 09:53:13 +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
Richard van Velzen
63be1f3a4d Only allow var definitions to be moved into the for-init clause 
Fixes #1079
 2016-05-15 21:00:51 +02:00
kzc
bcc1318d4b Do not apply negate_iife optimization to new expression 2016-05-09 03:19:28 -04:00
Richard van Velzen
e36e07fa77 Merge branch 'master' into harmony 2016-05-04 20:13:35 +02:00
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
not-an-aardvark
5b893c8ec3 Avoid syntax error in yield assignments (fixes #1054) 2016-04-25 19:14:44 -04:00
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
Richard van Velzen
8571a08a93 Do not attempt evaluating class expressions 
Broadly the same as function expressions - these actually are statements but
we're limited by the inheritance tree.

Fixes #1044
 2016-04-19 20:01:26 +02:00
Richard van Velzen
68cc14f846 Fixups after merge 2016-04-18 15:51:32 +02:00
Richard van Velzen
f94497d1d6 Merge branch 'master' into harmony 2016-04-18 15:50:35 +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
Richard van Velzen
eaf3911c31 Consider yield expressions as having side-effects 
See #1043
 2016-04-13 14:39:49 +02:00
Darío Javier Cravero
91cdb93e57 Implement harmony generators and yield 
Uses #716's implementation and adds tests.

Fixes #716.
 2016-04-13 14:22:08 +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
Fábio Santos
634f231b78 First class block scope 
- Make let, const, and class symbols be declared in a block scope.
- Piggy back on existing catch symbol implementation to get block-aware mangling working
- Make sure unused block-scoped declarations can be dropped
- Don't eliminate a block if it has a block-scoped declaration
- Remove silly empty anonymous blocks left over from drop_unused
- AST_Toplevel now gets to call drop_unused too, since block-scoped variables aren't global!
- Don't consider block declarations global
 2016-03-27 19:40:20 +02:00
Fábio Santos
6702cae918 fix #1021 2016-03-27 12:21:39 +01:00
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
Fábio Santos
6d2f77c180 fix #1003 by removing AST_ObjectSymbol and using AST_ObjectKeyVal for the same effect 2016-03-14 13:42:50 +01:00
Fábio Santos
accca2445f fix crash: Import statements don't abort 2016-03-14 12:54:05 +01:00
Fábio Santos
0bc4f6edb4 Don't mangle exported symbols 2016-03-14 12:54:05 +01:00
Fábio Santos
ce84a706a3 Implement the export statement 2016-03-14 12:54:05 +01:00
Fábio Santos
86b5248837 Mangling externally imported names by using aliasing 2016-03-14 12:54:05 +01:00
Fábio Santos
59e1601fb8 importing names in the modules, not just default imports 2016-03-14 12:54:05 +01:00
Fábio Santos
d35a9e7839 Importing names from places 2016-03-14 12:54:05 +01:00
Fábio Santos
0465bd270d Starting out the import statement 2016-03-14 12:54:05 +01:00
philippsimon
ee6c9fabb7 Fix: Uglified Number.prototype functions on big numbers 2016-03-14 12:41:06 +01:00
viclm
6780d0906c Fix eager parsing of arrow functions for non-punc tokens 2016-03-10 22:18:48 +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
Darío Javier Cravero
0b303379c0 fix: don't fail if definition is undefined 
Running `uglifyjs --verbose --compress --mangle --screw-ie8 class.js`
with
`class.js`:
```
class Foo {
  bar() {
  }
}
```
Fails with:
```
undefined:4041
  return this.definition().unmangleable(options);
TypeError: Cannot read property 'unmangleable' of undefined
...
```
 2016-02-10 10:17:32 +01:00
Fábio Santos
d7ec2ecc12 Fix #931: Create arrow functions in maybe_assign so that they can be used in assignments 2016-02-09 00:02:23 +00:00
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
Fugiman
5e78f20f1c Remove duplicate error message 2016-01-19 19:22:22 +01:00
Fugiman
1f75232062 Fix template string parsing 2016-01-19 19:22:22 +01:00
Fábio Santos
028ff64e9a Default values inside destructurings 2016-01-19 19:22:22 +01:00
Fábio Santos
7a8cffd631 Move the idea of a symbol having a default value up the class chain. 2016-01-19 19:22:22 +01:00
Fábio Santos
5b553aafe2 Destructuring parameters with defaults. function x({ foo, bar } = {}) { } 2016-01-19 19:22:22 +01:00
Fábio Santos
084437bc6d Non-destructuring default parameters 2016-01-19 19:22:22 +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
Richard van Velzen
7f3dbb6df7 Merge branch 'master' into harmony 2015-12-26 17:59:38 +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
Richard van Velzen
e4d73d8b7c Merge pull request #870 from fabiosantoscode/feature/harmony-class 
Harmony: classes
 2015-12-07 18:59:07 +01:00
kzc
774bda13cd #873 Fix conditionals optimizations with default compress options 2015-11-24 13:27:50 -05:00
Fábio Santos
a800356ad0 Implement new.target 2015-11-21 14:48:23 +00:00
Fábio Santos
e076abdbf2 Mangle class names correctly 2015-11-21 13:59:18 +00:00
Fábio Santos
425613b0d2 mangle class names 2015-11-21 12:20:20 +00:00
Fábio Santos
69da8e53e0 Separate class expressions from class declarations and their symbols like defuns 2015-11-21 09:17:32 +00:00
Fábio Santos
bb6b3a773a Make AST_Class inherit AST_Scope instead of AST_Object 
This is one of those days I'd love to use multiple inheritance.

An AST_Class has lots of common with AST_Object, but unfortunately
`instanceof AST_Scope` is used very, very much, and a class has its name
inside its own special pocket scope. This compels me to make AST_Class
inherit Scope instead.

It looks like, although there is much in common with AST_Object,
`instanceof AST_Object` seldom are made, perhaps because it is less
often necessary to traverse an object than a scope.
 2015-11-20 19:34:10 +00:00
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