зеркало из https://github.com/mozilla/gecko-dev.git
33f1eee4d5
This patch adds support for tests metadata. A test script parser is added as well as a new "doc" flavor that can be used to display the script info in the command line. This parser will be the basis for building automated docs and scripts verifications if we want to do this. Differential Revision: https://phabricator.services.mozilla.com/D72800 |
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| esprima | ||
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| README | ||
| setup.cfg | ||
| setup.py | ||
README
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**Esprima** (`esprima.org <http://esprima.org>`__, BSD license) is a
high performance, standard-compliant
`ECMAScript <http://www.ecma-international.org/publications/standards/Ecma-262.htm>`__
parser officially written in ECMAScript (also popularly known as
`JavaScript <https://en.wikipedia.org/wiki/JavaScript>`__) and ported to
Python. Esprima is created and maintained by `Ariya
Hidayat <https://twitter.com/ariyahidayat>`__, with the help of `many
contributors <https://github.com/jquery/esprima/contributors>`__.
Python port is a line-by-line manual translation and was created and is
maintained by `German Mendez Bravo
(Kronuz) <https://twitter.com/germbravo>`__.
Features
~~~~~~~~
- Full support for ECMAScript 2017 (`ECMA-262 8th
Edition <http://www.ecma-international.org/publications/standards/Ecma-262.htm>`__)
- Sensible `syntax tree
format <https://github.com/estree/estree/blob/master/es5.md>`__ as
standardized by `ESTree project <https://github.com/estree/estree>`__
- Experimental support for `JSX <https://facebook.github.io/jsx/>`__, a
syntax extension for `React <https://facebook.github.io/react/>`__
- Optional tracking of syntax node location (index-based and
line-column)
- `Heavily tested <http://esprima.org/test/ci.html>`__ (~1500 `unit
tests <https://github.com/jquery/esprima/tree/master/test/fixtures>`__
with `full code
coverage <https://codecov.io/github/jquery/esprima>`__)
Installation
~~~~~~~~~~~~
.. code:: shell
pip install esprima
API
~~~
Esprima can be used to perform `lexical
analysis <https://en.wikipedia.org/wiki/Lexical_analysis>`__
(tokenization) or `syntactic
analysis <https://en.wikipedia.org/wiki/Parsing>`__ (parsing) of a
JavaScript program.
A simple example:
.. code:: javascript
>>> import esprima
>>> program = 'const answer = 42'
>>> esprima.tokenize(program)
[{
type: "Keyword",
value: "const"
}, {
type: "Identifier",
value: "answer"
}, {
type: "Punctuator",
value: "="
}, {
type: "Numeric",
value: "42"
}]
>>> esprima.parseScript(program)
{
body: [
{
kind: "const",
declarations: [
{
init: {
raw: "42",
type: "Literal",
value: 42
},
type: "VariableDeclarator",
id: {
type: "Identifier",
name: "answer"
}
}
],
type: "VariableDeclaration"
}
],
type: "Program",
sourceType: "script"
}
For more information, please read the `complete
documentation <http://esprima.org/doc>`__.
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