JoBoEVD/UglifyJS
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167 Commits

Author SHA1 Message Date
alexlamsl
88a338f29e Merge branch 'master' into harmony-2.8.0 2017-02-27 04:37:48 +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
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
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
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
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
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
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
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
Richard van Velzen
b7bb706150 Merge branch 'master' into harmony 2016-10-23 22:11:27 +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
alexlamsl
4761d07e0b Optimize unmodified variables 2016-10-01 11:36:11 +02:00
Richard van Velzen
c644c1292d Merge branch 'master' into harmony 2016-08-15 09:09:04 +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
6fd9b338dd Merge branch 'master' into harmony 2016-07-03 21:35:00 +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
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
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
Richard van Velzen
f94497d1d6 Merge branch 'master' into harmony 2016-04-18 15:50:35 +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
0bc4f6edb4 Don't mangle exported symbols 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
kzc
102d1b9137 #877 Ignore mangle sort option 2016-02-27 15:33:10 -05:00
alexlamsl
6547437725 preserve ThisBinding for side_effects 2016-02-17 19:34:01 +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
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
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
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
7f3dbb6df7 Merge branch 'master' into harmony 2015-12-26 17:59:38 +01:00
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
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
Richard van Velzen
b14496c742 Merge branch 'master' into harmony 
Conflicts:
	lib/compress.js
 2015-10-12 08:54:44 +02:00
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
Fábio Santos
e99bc914ca Do not mangle a name if it is in a destructuring vardef. 2015-08-21 12:04:26 +02:00
Fábio Santos
e80ed38772 Super! 2015-08-07 02:44:53 +01:00
Fábio Santos
32f76f7ff8 Starting destructuring. 2015-07-29 14:54:45 +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
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
Cheng Liangyu
fe06fc85d3 fix base54 2014-12-01 13:16:44 +08:00
Arnavion
7be680d3f8 Don't warn for an unreferenced exception symbol in a catch block. 2014-09-12 21:01:19 -07:00
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
f65e55dff4 minor 2013-12-16 20:37:09 +02:00
colorhook
fa3300f314 bugfix #242 2013-12-16 15:53:43 +08:00
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
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
d09f0adae3 arguments outside of a function is an ordinary variable. 
Fix #501
 2013-10-17 18:20:33 +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
9fc8a52142 Set "global" on undeclared SymbolDef-s 2013-05-22 13:08:19 +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
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
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
9e8ba27dcd Fix handling of constants 
Close #113
 2013-02-06 11:15:31 +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
320c110b33 When hoisting variables, try to merge in assignments that follow. 2012-12-05 12:30:25 +02:00
Mihai Bazon
e312c5c2a7 fix API breakage 
close #36, #38
 2012-11-08 12:31:28 +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
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
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
cb3cafa14d cripple scope to make IE happy :-( 
close #24
 2012-10-25 18:52:35 +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
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
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
dacce1b1fa seems cleaner if AST_Label doesn't inherit from AST_SymbolDeclaration 2012-10-10 11:37:51 +03:00
Mihai Bazon
3799ac8973 add --lint and display {file} in scope_warnings 2012-10-10 11:26:59 +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
d4970b35ac should not expose base54.sort() in the API docs, I think 2012-10-08 13:37:27 +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
682a58a1f5 removed some unused variables 2012-10-04 08:49:18 +03:00
Mihai Bazon
11863d6f9a more cleanup (dropped AST_SwitchBlock) 2012-10-03 15:52:31 +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
347160c631 add AST_SymbolConst for names defined with const 2012-10-02 12:22:39 +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
a83b28503f properly drop mutually-referring declarations that are not otherwise 
referenced and have no side effects
 2012-09-23 12:47:34 +03:00
Mihai Bazon
5491e1d7b1 better support for multiple input files: 
- use a single AST_Toplevel node for all files
- keep original source filename in the tokens
 2012-09-21 14:19:05 +03:00
Mihai Bazon
e8da72d304 drop unused variables 2012-09-19 12:27:38 +03:00
Mihai Bazon
a4d2340c73 fixed label scope/mangling 2012-09-18 19:26:46 +03:00
Mihai Bazon
669874d46b minor 2012-09-18 14:17:23 +03:00
Mihai Bazon
3da0ac4897 support for directives 2012-09-18 13:21:09 +03:00
Mihai Bazon
4e0262bdfb figure out label targets 2012-09-15 16:05:17 +03:00
Mihai Bazon
8e82d8d94c fixed some mess with symbols/scope 
- all symbols now have a `thedef` property which is a SymbolDef object,
  instead of the `uniq` that we had before (pointing to the first occurrence
  of the name as declaration).

- for undeclared symbols we still create a SymbolDef object in the toplevel
  scope but mark it "undeclared"

- we can now call figure_out_scope after squeezing, which is useful in order
  not to mangle names that were dropped by the squeezer
 2012-09-11 15:42:28 +03:00
Mihai Bazon
da407d46c6 checkpoint 
- discard statements with no side effects (unsafe? could be)
- safer hoist_vars (needs some revamping of scope/mangling)
 2012-09-11 13:15:55 +03:00