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