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# -*- coding: utf-8 -*-
"""
pygments.lexers.rust
~~~~~~~~~~~~~~~~~~~~
Lexers for the Rust language.
:copyright: Copyright 2006-2014 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 0.9).
.. versionadded:: 1.6
"""
name = 'Rust'
filenames = ['*.rs']
aliases = ['rust']
mimetypes = ['text/x-rustsrc']
tokens = {
'root': [
# Whitespace and Comments
(r'\n', Whitespace),
(r'\s+', Whitespace),
(r'//[/!](.*?)\n', Comment.Doc),
(r'//(.*?)\n', Comment.Single),
(r'/\*', Comment.Multiline, 'comment'),
# Keywords
(words((
'as', 'box', 'break', 'continue', 'do', 'else', 'enum', 'extern',
'fn', 'for', 'if', 'impl', 'in', 'loop', 'match', 'mut', 'priv',
'proc', 'pub', 'ref', 'return', 'static', '\'static', 'struct',
'trait', 'true', 'type', 'unsafe', 'while'), suffix=r'\b'),
Keyword),
(words(('alignof', 'be', 'const', 'offsetof', 'pure', 'sizeof',
'typeof', 'once', 'unsized', 'yield'), suffix=r'\b'),
Keyword.Reserved),
(r'(mod|use)\b', Keyword.Namespace),
(r'(true|false)\b', Keyword.Constant),
(r'let\b', Keyword.Declaration),
(words(('u8', 'u16', 'u32', 'u64', 'i8', 'i16', 'i32', 'i64', 'uint',
'int', 'f32', 'f64', 'str', 'bool'), suffix=r'\b'),
Keyword.Type),
(r'self\b', Name.Builtin.Pseudo),
# Prelude
(words((
'Freeze', 'Pod', 'Send', 'Sized', 'Add', 'Sub', 'Mul', 'Div', 'Rem', 'Neg', 'Not', 'BitAnd',
'BitOr', 'BitXor', 'Drop', 'Shl', 'Shr', 'Index', 'Option', 'Some', 'None', 'Result',
'Ok', 'Err', 'from_str', 'range', 'print', 'println', 'Any', 'AnyOwnExt', 'AnyRefExt',
'AnyMutRefExt', 'Ascii', 'AsciiCast', 'OnwedAsciiCast', 'AsciiStr',
'IntoBytes', 'Bool', 'ToCStr', 'Char', 'Clone', 'DeepClone', 'Eq', 'ApproxEq',
'Ord', 'TotalEq', 'Ordering', 'Less', 'Equal', 'Greater', 'Equiv', 'Container',
'Mutable', 'Map', 'MutableMap', 'Set', 'MutableSet', 'Default', 'FromStr',
'Hash', 'FromIterator', 'Extendable', 'Iterator', 'DoubleEndedIterator',
'RandomAccessIterator', 'CloneableIterator', 'OrdIterator',
'MutableDoubleEndedIterator', 'ExactSize', 'Times', 'Algebraic',
'Trigonometric', 'Exponential', 'Hyperbolic', 'Bitwise', 'BitCount',
'Bounded', 'Integer', 'Fractional', 'Real', 'RealExt', 'Num', 'NumCast',
'CheckedAdd', 'CheckedSub', 'CheckedMul', 'Orderable', 'Signed',
'Unsigned', 'Round', 'Primitive', 'Int', 'Float', 'ToStrRadix',
'ToPrimitive', 'FromPrimitive', 'GenericPath', 'Path', 'PosixPath',
'WindowsPath', 'RawPtr', 'Buffer', 'Writer', 'Reader', 'Seek',
'SendStr', 'SendStrOwned', 'SendStrStatic', 'IntoSendStr', 'Str',
'StrVector', 'StrSlice', 'OwnedStr', 'IterBytes', 'ToStr', 'IntoStr',
'CopyableTuple', 'ImmutableTuple', 'ImmutableEqVector', 'ImmutableTotalOrdVector',
'ImmutableCopyableVector', 'OwnedVector', 'OwnedCopyableVector',
'OwnedEqVector', 'MutableVector', 'MutableTotalOrdVector',
'Vector', 'VectorVector', 'CopyableVector', 'ImmutableVector',
'Port', 'Chan', 'SharedChan', 'spawn', 'drop'), suffix=r'\b'),
Name.Builtin),
(r'(ImmutableTuple\d+|Tuple\d+)\b', Name.Builtin),
# Borrowed pointer
(r'(&)(\'[A-Za-z_]\w*)?', bygroups(Operator, Name)),
# Labels
(r'\'[A-Za-z_]\w*:', Name.Label),
# Character Literal
(r"""'(\\['"\\nrt]|\\x[0-9a-fA-F]{2}|\\[0-7]{1,3}"""
r"""|\\u[0-9a-fA-F]{4}|\\U[0-9a-fA-F]{8}|.)'""",
String.Char),
# Lifetime
(r"""'[a-zA-Z_]\w*""", Name.Label),
# 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'"', String, 'string'),
(r'r(#*)".*?"\1', String.Raw),
# 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),
],
'number_lit': [
(r'[ui](8|16|32|64)', Keyword, '#pop'),
(r'f(32|64)', Keyword, '#pop'),
default('#pop'),
],
'string': [
(r'"', String, '#pop'),
(r"""\\['"\\nrt]|\\x[0-9a-fA-F]{2}|\\[0-7]{1,3}"""
r"""|\\u[0-9a-fA-F]{4}|\\U[0-9a-fA-F]{8}""", String.Escape),
(r'[^\\"]+', String),
(r'\\', 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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