You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
175 lines
6.7 KiB
175 lines
6.7 KiB
### esutils [](http://travis-ci.org/estools/esutils)
|
|
esutils ([esutils](http://github.com/estools/esutils)) is
|
|
utility box for ECMAScript language tools.
|
|
|
|
### API
|
|
|
|
### ast
|
|
|
|
#### ast.isExpression(node)
|
|
|
|
Returns true if `node` is an Expression as defined in ECMA262 edition 5.1 section
|
|
[11](https://es5.github.io/#x11).
|
|
|
|
#### ast.isStatement(node)
|
|
|
|
Returns true if `node` is a Statement as defined in ECMA262 edition 5.1 section
|
|
[12](https://es5.github.io/#x12).
|
|
|
|
#### ast.isIterationStatement(node)
|
|
|
|
Returns true if `node` is an IterationStatement as defined in ECMA262 edition
|
|
5.1 section [12.6](https://es5.github.io/#x12.6).
|
|
|
|
#### ast.isSourceElement(node)
|
|
|
|
Returns true if `node` is a SourceElement as defined in ECMA262 edition 5.1
|
|
section [14](https://es5.github.io/#x14).
|
|
|
|
#### ast.trailingStatement(node)
|
|
|
|
Returns `Statement?` if `node` has trailing `Statement`.
|
|
```js
|
|
if (cond)
|
|
consequent;
|
|
```
|
|
When taking this `IfStatement`, returns `consequent;` statement.
|
|
|
|
#### ast.isProblematicIfStatement(node)
|
|
|
|
Returns true if `node` is a problematic IfStatement. If `node` is a problematic `IfStatement`, `node` cannot be represented as an one on one JavaScript code.
|
|
```js
|
|
{
|
|
type: 'IfStatement',
|
|
consequent: {
|
|
type: 'WithStatement',
|
|
body: {
|
|
type: 'IfStatement',
|
|
consequent: {type: 'EmptyStatement'}
|
|
}
|
|
},
|
|
alternate: {type: 'EmptyStatement'}
|
|
}
|
|
```
|
|
The above node cannot be represented as a JavaScript code, since the top level `else` alternate belongs to an inner `IfStatement`.
|
|
|
|
|
|
### code
|
|
|
|
#### code.isDecimalDigit(code)
|
|
|
|
Return true if provided code is decimal digit.
|
|
|
|
#### code.isHexDigit(code)
|
|
|
|
Return true if provided code is hexadecimal digit.
|
|
|
|
#### code.isOctalDigit(code)
|
|
|
|
Return true if provided code is octal digit.
|
|
|
|
#### code.isWhiteSpace(code)
|
|
|
|
Return true if provided code is white space. White space characters are formally defined in ECMA262.
|
|
|
|
#### code.isLineTerminator(code)
|
|
|
|
Return true if provided code is line terminator. Line terminator characters are formally defined in ECMA262.
|
|
|
|
#### code.isIdentifierStart(code)
|
|
|
|
Return true if provided code can be the first character of ECMA262 Identifier. They are formally defined in ECMA262.
|
|
|
|
#### code.isIdentifierPart(code)
|
|
|
|
Return true if provided code can be the trailing character of ECMA262 Identifier. They are formally defined in ECMA262.
|
|
|
|
### keyword
|
|
|
|
#### keyword.isKeywordES5(id, strict)
|
|
|
|
Returns `true` if provided identifier string is a Keyword or Future Reserved Word
|
|
in ECMA262 edition 5.1. They are formally defined in ECMA262 sections
|
|
[7.6.1.1](http://es5.github.io/#x7.6.1.1) and [7.6.1.2](http://es5.github.io/#x7.6.1.2),
|
|
respectively. If the `strict` flag is truthy, this function additionally checks whether
|
|
`id` is a Keyword or Future Reserved Word under strict mode.
|
|
|
|
#### keyword.isKeywordES6(id, strict)
|
|
|
|
Returns `true` if provided identifier string is a Keyword or Future Reserved Word
|
|
in ECMA262 edition 6. They are formally defined in ECMA262 sections
|
|
[11.6.2.1](http://ecma-international.org/ecma-262/6.0/#sec-keywords) and
|
|
[11.6.2.2](http://ecma-international.org/ecma-262/6.0/#sec-future-reserved-words),
|
|
respectively. If the `strict` flag is truthy, this function additionally checks whether
|
|
`id` is a Keyword or Future Reserved Word under strict mode.
|
|
|
|
#### keyword.isReservedWordES5(id, strict)
|
|
|
|
Returns `true` if provided identifier string is a Reserved Word in ECMA262 edition 5.1.
|
|
They are formally defined in ECMA262 section [7.6.1](http://es5.github.io/#x7.6.1).
|
|
If the `strict` flag is truthy, this function additionally checks whether `id`
|
|
is a Reserved Word under strict mode.
|
|
|
|
#### keyword.isReservedWordES6(id, strict)
|
|
|
|
Returns `true` if provided identifier string is a Reserved Word in ECMA262 edition 6.
|
|
They are formally defined in ECMA262 section [11.6.2](http://ecma-international.org/ecma-262/6.0/#sec-reserved-words).
|
|
If the `strict` flag is truthy, this function additionally checks whether `id`
|
|
is a Reserved Word under strict mode.
|
|
|
|
#### keyword.isRestrictedWord(id)
|
|
|
|
Returns `true` if provided identifier string is one of `eval` or `arguments`.
|
|
They are restricted in strict mode code throughout ECMA262 edition 5.1 and
|
|
in ECMA262 edition 6 section [12.1.1](http://ecma-international.org/ecma-262/6.0/#sec-identifiers-static-semantics-early-errors).
|
|
|
|
#### keyword.isIdentifierNameES5(id)
|
|
|
|
Return true if provided identifier string is an IdentifierName as specified in
|
|
ECMA262 edition 5.1 section [7.6](https://es5.github.io/#x7.6).
|
|
|
|
#### keyword.isIdentifierNameES6(id)
|
|
|
|
Return true if provided identifier string is an IdentifierName as specified in
|
|
ECMA262 edition 6 section [11.6](http://ecma-international.org/ecma-262/6.0/#sec-names-and-keywords).
|
|
|
|
#### keyword.isIdentifierES5(id, strict)
|
|
|
|
Return true if provided identifier string is an Identifier as specified in
|
|
ECMA262 edition 5.1 section [7.6](https://es5.github.io/#x7.6). If the `strict`
|
|
flag is truthy, this function additionally checks whether `id` is an Identifier
|
|
under strict mode.
|
|
|
|
#### keyword.isIdentifierES6(id, strict)
|
|
|
|
Return true if provided identifier string is an Identifier as specified in
|
|
ECMA262 edition 6 section [12.1](http://ecma-international.org/ecma-262/6.0/#sec-identifiers).
|
|
If the `strict` flag is truthy, this function additionally checks whether `id`
|
|
is an Identifier under strict mode.
|
|
|
|
### License
|
|
|
|
Copyright (C) 2013 [Yusuke Suzuki](http://github.com/Constellation)
|
|
(twitter: [@Constellation](http://twitter.com/Constellation)) and other contributors.
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions are met:
|
|
|
|
* Redistributions of source code must retain the above copyright
|
|
notice, this list of conditions and the following disclaimer.
|
|
|
|
* Redistributions in binary form must reproduce the above copyright
|
|
notice, this list of conditions and the following disclaimer in the
|
|
documentation and/or other materials provided with the distribution.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
|
|
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
|
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
|
|
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|