374 lines
8.4 KiB
Markdown
374 lines
8.4 KiB
Markdown
## 5.2.1 (2017-10-30)
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### Bug fixes
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Fix a token context corruption bug.
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## 5.2.0 (2017-10-30)
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### Bug fixes
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Fix token context tracking for `class` and `function` in property-name position.
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Make sure `%*` isn't parsed as a valid operator.
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The `full` and `fullAncestor` walkers no longer visit nodes multiple times.
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Allow shorthand properties `get` and `set` to be followed by default values.
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Disallow `super` when not in callee or object position.
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### New features
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Support [`directive` property](https://github.com/estree/estree/compare/b3de58c9997504d6fba04b72f76e6dd1619ee4eb...1da8e603237144f44710360f8feb7a9977e905e0) on directive expression statements.
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## 5.1.2 (2017-09-04)
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### Bug fixes
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Disable parsing of legacy HTML-style comments in modules.
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Fix parsing of async methods whose names are keywords.
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## 5.1.1 (2017-07-06)
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### Bug fixes
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Fix problem with disambiguating regexp and division after a class.
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## 5.1.0 (2017-07-05)
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### Bug fixes
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Fix tokenizing of regexps in an object-desctructuring `for`/`of` loop and after `yield`.
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Parse zero-prefixed numbers with non-octal digits as decimal.
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Allow object/array patterns in rest parameters.
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Don't error when `yield` is used as a property name.
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Allow `async` as a shorthand object property.
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Make the ES module version of the loose parser actually work.
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### New features
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Implement the [template literal revision proposal](https://github.com/tc39/proposal-template-literal-revision) for ES9.
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New walker functions `full` and `fullAncestor`.
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## 5.0.3 (2017-04-01)
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### Bug fixes
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Fix spurious duplicate variable definition errors for named functions.
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## 5.0.2 (2017-03-30)
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### Bug fixes
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A binary operator after a parenthesized arrow expression is no longer incorrectly treated as an error.
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## 5.0.0 (2017-03-28)
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### Bug fixes
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Raise an error for duplicated lexical bindings.
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Fix spurious error when an assignement expression occurred after a spread expression.
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Accept regular expressions after `of` (in `for`/`of`), `yield` (in a generator), and braced arrow functions.
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Allow labels in front or `var` declarations, even in strict mode.
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### Breaking changes
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Parse declarations following `export default` as declaration nodes, not expressions. This means that class and function declarations nodes can now have `null` as their `id`.
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## 4.0.11 (2017-02-07)
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### Bug fixes
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Allow all forms of member expressions to be parenthesized as lvalue.
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## 4.0.10 (2017-02-07)
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### Bug fixes
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Don't expect semicolons after default-exported functions or classes,
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even when they are expressions.
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Check for use of `'use strict'` directives in non-simple parameter
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functions, even when already in strict mode.
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## 4.0.9 (2017-02-06)
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### Bug fixes
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Fix incorrect error raised for parenthesized simple assignment
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targets, so that `(x) = 1` parses again.
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## 4.0.8 (2017-02-03)
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### Bug fixes
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Solve spurious parenthesized pattern errors by temporarily erring on
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the side of accepting programs that our delayed errors don't handle
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correctly yet.
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## 4.0.7 (2017-02-02)
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### Bug fixes
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Accept invalidly rejected code like `(x).y = 2` again.
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Don't raise an error when a function _inside_ strict code has a
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non-simple parameter list.
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## 4.0.6 (2017-02-02)
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### Bug fixes
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Fix exponential behavior (manifesting itself as a complete hang for
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even relatively small source files) introduced by the new 'use strict'
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check.
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## 4.0.5 (2017-02-02)
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### Bug fixes
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Disallow parenthesized pattern expressions.
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Allow keywords as export names.
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Don't allow the `async` keyword to be parenthesized.
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Properly raise an error when a keyword contains a character escape.
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Allow `"use strict"` to appear after other string literal expressions.
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Disallow labeled declarations.
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## 4.0.4 (2016-12-19)
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### Bug fixes
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Fix issue with loading acorn_loose.js with an AMD loader.
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Fix crash when `export` was followed by a keyword that can't be
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exported.
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## 4.0.3 (2016-08-16)
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### Bug fixes
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Allow regular function declarations inside single-statement `if`
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branches in loose mode. Forbid them entirely in strict mode.
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Properly parse properties named `async` in ES2017 mode.
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Fix bug where reserved words were broken in ES2017 mode.
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## 4.0.2 (2016-08-11)
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### Bug fixes
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Don't ignore period or 'e' characters after octal numbers.
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Fix broken parsing for call expressions in default parameter values
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of arrow functions.
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## 4.0.1 (2016-08-08)
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### Bug fixes
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Fix false positives in duplicated export name errors.
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## 4.0.0 (2016-08-07)
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### Breaking changes
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The default `ecmaVersion` option value is now 7.
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A number of internal method signatures changed, so plugins might need
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to be updated.
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### Bug fixes
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The parser now raises errors on duplicated export names.
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`arguments` and `eval` can now be used in shorthand properties.
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Duplicate parameter names in non-simple argument lists now always
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produce an error.
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### New features
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The `ecmaVersion` option now also accepts year-style version numbers
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(2015, etc).
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Support for `async`/`await` syntax when `ecmaVersion` is >= 8.
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Support for trailing commas in call expressions when `ecmaVersion`
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is >= 8.
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## 3.3.0 (2016-07-25)
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### Bug fixes
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Fix bug in tokenizing of regexp operator after a function declaration.
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Fix parser crash when parsing an array pattern with a hole.
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### New features
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Implement check against complex argument lists in functions that
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enable strict mode in ES7.
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## 3.2.0 (2016-06-07)
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### Bug fixes
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Improve handling of lack of unicode regexp support in host
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environment.
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Properly reject shorthand properties whose name is a keyword.
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Don't crash when the loose parser is called without options object.
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### New features
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Visitors created with `visit.make` now have their base as _prototype_,
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rather than copying properties into a fresh object.
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Make it possible to use `visit.ancestor` with a walk state.
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## 3.1.0 (2016-04-18)
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### Bug fixes
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Fix issue where the loose parser created invalid TemplateElement nodes
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for unclosed template literals.
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Properly tokenize the division operator directly after a function
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expression.
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Allow trailing comma in destructuring arrays.
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### New features
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The walker now allows defining handlers for `CatchClause` nodes.
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## 3.0.4 (2016-02-25)
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### Fixes
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Allow update expressions as left-hand-side of the ES7 exponential
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operator.
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## 3.0.2 (2016-02-10)
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### Fixes
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Fix bug that accidentally made `undefined` a reserved word when
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parsing ES7.
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## 3.0.0 (2016-02-10)
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### Breaking changes
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The default value of the `ecmaVersion` option is now 6 (used to be 5).
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Support for comprehension syntax (which was dropped from the draft
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spec) has been removed.
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### Fixes
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`let` and `yield` are now “contextual keywords”, meaning you can
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mostly use them as identifiers in ES5 non-strict code.
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A parenthesized class or function expression after `export default` is
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now parsed correctly.
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### New features
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When `ecmaVersion` is set to 7, Acorn will parse the exponentiation
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operator (`**`).
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The identifier character ranges are now based on Unicode 8.0.0.
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Plugins can now override the `raiseRecoverable` method to override the
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way non-critical errors are handled.
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## 2.7.0 (2016-01-04)
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### Fixes
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Stop allowing rest parameters in setters.
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Make sure the loose parser always attaches a `local` property to
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`ImportNamespaceSpecifier` nodes.
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Disallow `y` rexexp flag in ES5.
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Disallow `\00` and `\000` escapes in strict mode.
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Raise an error when an import name is a reserved word.
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## 2.6.4 (2015-11-12)
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### Fixes
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Fix crash in loose parser when parsing invalid object pattern.
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### New features
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Support plugins in the loose parser.
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## 2.6.2 (2015-11-10)
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### Fixes
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Don't crash when no options object is passed.
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## 2.6.0 (2015-11-09)
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### Fixes
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Add `await` as a reserved word in module sources.
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Disallow `yield` in a parameter default value for a generator.
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Forbid using a comma after a rest pattern in an array destructuring.
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### New features
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Support parsing stdin in command-line tool.
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## 2.5.2 (2015-10-27)
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### Fixes
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Fix bug where the walker walked an exported `let` statement as an
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expression.
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## 2.5.0 (2015-10-27)
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### Fixes
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Fix tokenizer support in the command-line tool.
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In the loose parser, don't allow non-string-literals as import
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sources.
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Stop allowing `new.target` outside of functions.
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Remove legacy `guard` and `guardedHandler` properties from try nodes.
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Stop allowing multiple `__proto__` properties on an object literal in
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strict mode.
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Don't allow rest parameters to be non-identifier patterns.
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Check for duplicate paramter names in arrow functions.
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