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""" pygments.lexers.rust ~~~~~~~~~~~~~~~~~~~~ Lexers for the Rust language. :copyright: Copyright 2006-2022 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 1.47). .. versionadded:: 1.6 """ name = 'Rust' url = 'https://www.rust-lang.org/' filenames = ['*.rs', '*.rs.in'] aliases = ['rust', 'rs'] mimetypes = ['text/rust', 'text/x-rust'] keyword_types = (words(( 'u8', 'u16', 'u32', 'u64', 'u128', 'i8', 'i16', 'i32', 'i64', 'i128', 'usize', 'isize', 'f32', 'f64', 'char', 'str', 'bool', ), suffix=r'\b'), Keyword.Type) builtin_funcs_types = (words(( 'Copy', 'Send', 'Sized', 'Sync', 'Unpin', 'Drop', 'Fn', 'FnMut', 'FnOnce', 'drop', 'Box', 'ToOwned', 'Clone', 'PartialEq', 'PartialOrd', 'Eq', 'Ord', 'AsRef', 'AsMut', 'Into', 'From', 'Default', 'Iterator', 'Extend', 'IntoIterator', 'DoubleEndedIterator', 'ExactSizeIterator', 'Option', 'Some', 'None', 'Result', 'Ok', 'Err', 'String', 'ToString', 'Vec', ), suffix=r'\b'), Name.Builtin) builtin_macros = (words(( 'asm', 'assert', 'assert_eq', 'assert_ne', 'cfg', 'column', 'compile_error', 'concat', 'concat_idents', 'dbg', 'debug_assert', 'debug_assert_eq', 'debug_assert_ne', 'env', 'eprint', 'eprintln', 'file', 'format', 'format_args', 'format_args_nl', 'global_asm', 'include', 'include_bytes', 'include_str', 'is_aarch64_feature_detected', 'is_arm_feature_detected', 'is_mips64_feature_detected', 'is_mips_feature_detected', 'is_powerpc64_feature_detected', 'is_powerpc_feature_detected', 'is_x86_feature_detected', 'line', 'llvm_asm', 'log_syntax', 'macro_rules', 'matches', 'module_path', 'option_env', 'panic', 'print', 'println', 'stringify', 'thread_local', 'todo', 'trace_macros', 'unimplemented', 'unreachable', 'vec', 'write', 'writeln', ), suffix=r'!'), Name.Function.Magic) 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', 'async', 'await', 'box', 'const', 'crate', 'dyn', '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', 'become', 'do', 'final', 'macro', 'override', 'priv', 'typeof', 'try', 'unsized', 'virtual', 'yield'), suffix=r'\b'), Keyword.Reserved), (r'(true|false)\b', Keyword.Constant), (r'self\b', Name.Builtin.Pseudo), (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'[sS]elf\b', Name.Builtin.Pseudo), # Prelude (taken from Rust's src/libstd/prelude.rs) builtin_funcs_types, builtin_macros, # Path separators, so types don't catch them. (r'::\b', Text), # Types in positions. (r'(?::|->)', Text, 'typename'), # Labels (r'(break|continue)(\b\s*)(\'[A-Za-z_]\w*)?', bygroups(Keyword, Text.Whitespace, Name.Label)), # Character literals (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 literals (r'0b[01_]+', Number.Bin, 'number_lit'), # Octal literals (r'0o[0-7_]+', Number.Oct, 'number_lit'), # Hexadecimal literals (r'0[xX][0-9a-fA-F_]+', Number.Hex, 'number_lit'), # Decimal literals (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 literals (r'b"', String, 'bytestring'), (r'"', String, 'string'), (r'(?s)b?r(#*)".*?"\1', String), # Lifetime names (r"'", Operator, 'lifetime'), # Operators and Punctuation (r'\.\.=?', Operator), (r'[{}()\[\],.;]', Punctuation), (r'[+\-*/%&|<>^!~@=:?]', Operator), # Identifiers (r'[a-zA-Z_]\w*', Name), # Raw identifiers (r'r#[a-zA-Z_]\w*', Name), # Attributes (r'#!?\[', Comment.Preproc, 'attribute['), # Misc # Lone hashes: not used in Rust syntax, but allowed in macro # arguments, most famously for quote::quote!() (r'#', Text), ], '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), (r"'", Operator, 'lifetime'), builtin_funcs_types, keyword_types, (r'[a-zA-Z_]\w*', Name.Class, '#pop'), default('#pop'), ], 'lifetime': [ (r"(static|_)", Name.Builtin), (r"[a-zA-Z_]+\w*", Name.Attribute), 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'), ], 'attribute_common': [ (r'"', String, 'string'), (r'\[', Comment.Preproc, 'attribute['), ], 'attribute[': [ include('attribute_common'), (r'\]', Comment.Preproc, '#pop'), (r'[^"\]\[]+', Comment.Preproc), ], }