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Current File : //proc/thread-self/root/usr/lib/python3/dist-packages/pygments/lexers/rust.py # -*- coding: utf-8 -*-
"""
pygments.lexers.rust
~~~~~~~~~~~~~~~~~~~~
Lexers for the Rust language.
:copyright: Copyright 2006-2017 by the Pygments team, see AUTHORS.
:license: BSD, see LICENSE for details.
"""
from pygments.lexer import RegexLexer, include, bygroups, words, default
from pygments.token import Text, Comment, Operator, Keyword, Name, String, \
Number, Punctuation, Whitespace
__all__ = ['RustLexer']
class RustLexer(RegexLexer):
"""
Lexer for the Rust programming language (version 1.10).
.. versionadded:: 1.6
"""
name = 'Rust'
filenames = ['*.rs', '*.rs.in']
aliases = ['rust', 'rs']
mimetypes = ['text/rust']
keyword_types = (
words(('u8', 'u16', 'u32', 'u64', 'i8', 'i16', 'i32', 'i64',
'usize', 'isize', 'f32', 'f64', 'str', 'bool'),
suffix=r'\b'),
Keyword.Type)
builtin_types = (words((
# Reexported core operators
'Copy', 'Send', 'Sized', 'Sync',
'Drop', 'Fn', 'FnMut', 'FnOnce',
# Reexported types and traits
'Box',
'ToOwned',
'Clone',
'PartialEq', 'PartialOrd', 'Eq', 'Ord',
'AsRef', 'AsMut', 'Into', 'From',
'Default',
'Iterator', 'Extend', 'IntoIterator',
'DoubleEndedIterator', 'ExactSizeIterator',
'Option',
'Some', 'None',
'Result',
'Ok', 'Err',
'SliceConcatExt',
'String', 'ToString',
'Vec'), suffix=r'\b'),
Name.Builtin)
tokens = {
'root': [
# rust allows a file to start with a shebang, but if the first line
# starts with #![ then it’s not a shebang but a crate attribute.
(r'#![^[\r\n].*$', Comment.Preproc),
default('base'),
],
'base': [
# Whitespace and Comments
(r'\n', Whitespace),
(r'\s+', Whitespace),
(r'//!.*?\n', String.Doc),
(r'///(\n|[^/].*?\n)', String.Doc),
(r'//(.*?)\n', Comment.Single),
(r'/\*\*(\n|[^/*])', String.Doc, 'doccomment'),
(r'/\*!', String.Doc, 'doccomment'),
(r'/\*', Comment.Multiline, 'comment'),
# Macro parameters
(r"""\$([a-zA-Z_]\w*|\(,?|\),?|,?)""", Comment.Preproc),
# Keywords
(words((
'as', 'box', 'const', 'crate', 'else', 'extern',
'for', 'if', 'impl', 'in', 'loop', 'match', 'move',
'mut', 'pub', 'ref', 'return', 'static', 'super',
'trait', 'unsafe', 'use', 'where', 'while'), suffix=r'\b'),
Keyword),
(words(('abstract', 'alignof', 'become', 'do', 'final', 'macro',
'offsetof', 'override', 'priv', 'proc', 'pure', 'sizeof',
'typeof', 'unsized', 'virtual', 'yield'), suffix=r'\b'),
Keyword.Reserved),
(r'(true|false)\b', Keyword.Constant),
(r'mod\b', Keyword, 'modname'),
(r'let\b', Keyword.Declaration),
(r'fn\b', Keyword, 'funcname'),
(r'(struct|enum|type|union)\b', Keyword, 'typename'),
(r'(default)(\s+)(type|fn)\b', bygroups(Keyword, Text, Keyword)),
keyword_types,
(r'self\b', Name.Builtin.Pseudo),
# Prelude (taken from Rust’s src/libstd/prelude.rs)
builtin_types,
# Path seperators, so types don't catch them.
(r'::\b', Text),
# Types in positions.
(r'(?::|->)', Text, 'typename'),
# Labels
(r'(break|continue)(\s*)(\'[A-Za-z_]\w*)?',
bygroups(Keyword, Text.Whitespace, Name.Label)),
# Character Literal
(r"""'(\\['"\\nrt]|\\x[0-7][0-9a-fA-F]|\\0"""
r"""|\\u\{[0-9a-fA-F]{1,6}\}|.)'""",
String.Char),
(r"""b'(\\['"\\nrt]|\\x[0-9a-fA-F]{2}|\\0"""
r"""|\\u\{[0-9a-fA-F]{1,6}\}|.)'""",
String.Char),
# Binary Literal
(r'0b[01_]+', Number.Bin, 'number_lit'),
# Octal Literal
(r'0o[0-7_]+', Number.Oct, 'number_lit'),
# Hexadecimal Literal
(r'0[xX][0-9a-fA-F_]+', Number.Hex, 'number_lit'),
# Decimal Literal
(r'[0-9][0-9_]*(\.[0-9_]+[eE][+\-]?[0-9_]+|'
r'\.[0-9_]*(?!\.)|[eE][+\-]?[0-9_]+)', Number.Float,
'number_lit'),
(r'[0-9][0-9_]*', Number.Integer, 'number_lit'),
# String Literal
(r'b"', String, 'bytestring'),
(r'"', String, 'string'),
(r'b?r(#*)".*?"\1', String),
# Lifetime
(r"""'static""", Name.Builtin),
(r"""'[a-zA-Z_]\w*""", Name.Attribute),
# Operators and Punctuation
(r'[{}()\[\],.;]', Punctuation),
(r'[+\-*/%&|<>^!~@=:?]', Operator),
# Identifier
(r'[a-zA-Z_]\w*', Name),
# Attributes
(r'#!?\[', Comment.Preproc, 'attribute['),
# Macros
(r'([A-Za-z_]\w*)(!)(\s*)([A-Za-z_]\w*)?(\s*)(\{)',
bygroups(Comment.Preproc, Punctuation, Whitespace, Name,
Whitespace, Punctuation), 'macro{'),
(r'([A-Za-z_]\w*)(!)(\s*)([A-Za-z_]\w*)?(\()',
bygroups(Comment.Preproc, Punctuation, Whitespace, Name,
Punctuation), 'macro('),
],
'comment': [
(r'[^*/]+', Comment.Multiline),
(r'/\*', Comment.Multiline, '#push'),
(r'\*/', Comment.Multiline, '#pop'),
(r'[*/]', Comment.Multiline),
],
'doccomment': [
(r'[^*/]+', String.Doc),
(r'/\*', String.Doc, '#push'),
(r'\*/', String.Doc, '#pop'),
(r'[*/]', String.Doc),
],
'modname': [
(r'\s+', Text),
(r'[a-zA-Z_]\w*', Name.Namespace, '#pop'),
default('#pop'),
],
'funcname': [
(r'\s+', Text),
(r'[a-zA-Z_]\w*', Name.Function, '#pop'),
default('#pop'),
],
'typename': [
(r'\s+', Text),
(r'&', Keyword.Pseudo),
builtin_types,
keyword_types,
(r'[a-zA-Z_]\w*', Name.Class, '#pop'),
default('#pop'),
],
'number_lit': [
(r'[ui](8|16|32|64|size)', Keyword, '#pop'),
(r'f(32|64)', Keyword, '#pop'),
default('#pop'),
],
'string': [
(r'"', String, '#pop'),
(r"""\\['"\\nrt]|\\x[0-7][0-9a-fA-F]|\\0"""
r"""|\\u\{[0-9a-fA-F]{1,6}\}""", String.Escape),
(r'[^\\"]+', String),
(r'\\', String),
],
'bytestring': [
(r"""\\x[89a-fA-F][0-9a-fA-F]""", String.Escape),
include('string'),
],
'macro{': [
(r'\{', Operator, '#push'),
(r'\}', Operator, '#pop'),
],
'macro(': [
(r'\(', Operator, '#push'),
(r'\)', Operator, '#pop'),
],
'attribute_common': [
(r'"', String, 'string'),
(r'\[', Comment.Preproc, 'attribute['),
(r'\(', Comment.Preproc, 'attribute('),
],
'attribute[': [
include('attribute_common'),
(r'\];?', Comment.Preproc, '#pop'),
(r'[^"\]]+', Comment.Preproc),
],
'attribute(': [
include('attribute_common'),
(r'\);?', Comment.Preproc, '#pop'),
(r'[^")]+', Comment.Preproc),
],
}
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