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117 lines
3.9 KiB
117 lines
3.9 KiB
# -*- coding: utf-8 -*-
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"""
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pygments.lexers.whiley
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~~~~~~~~~~~~~~~~~~~~~~
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Lexers for the Whiley language.
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:copyright: Copyright 2006-2020 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, bygroups, words
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from pygments.token import Comment, Keyword, Name, Number, Operator, \
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Punctuation, String, Text
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__all__ = ['WhileyLexer']
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class WhileyLexer(RegexLexer):
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"""
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Lexer for the Whiley programming language.
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.. versionadded:: 2.2
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"""
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name = 'Whiley'
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filenames = ['*.whiley']
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aliases = ['whiley']
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mimetypes = ['text/x-whiley']
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# See the language specification:
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# http://whiley.org/download/WhileyLanguageSpec.pdf
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tokens = {
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'root': [
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# Whitespace
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(r'\s+', Text),
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# Comments
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(r'//.*', Comment.Single),
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# don't parse empty comment as doc comment
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(r'/\*\*/', Comment.Multiline),
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(r'(?s)/\*\*.*?\*/', String.Doc),
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(r'(?s)/\*.*?\*/', Comment.Multiline),
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# Keywords
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(words((
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'if', 'else', 'while', 'for', 'do', 'return',
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'switch', 'case', 'default', 'break', 'continue',
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'requires', 'ensures', 'where', 'assert', 'assume',
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'all', 'no', 'some', 'in', 'is', 'new',
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'throw', 'try', 'catch', 'debug', 'skip', 'fail',
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'finite', 'total'), suffix=r'\b'), Keyword.Reserved),
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(words((
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'function', 'method', 'public', 'private', 'protected',
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'export', 'native'), suffix=r'\b'), Keyword.Declaration),
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# "constant" & "type" are not keywords unless used in declarations
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(r'(constant|type)(\s+)([a-zA-Z_]\w*)(\s+)(is)\b',
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bygroups(Keyword.Declaration, Text, Name, Text, Keyword.Reserved)),
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(r'(true|false|null)\b', Keyword.Constant),
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(r'(bool|byte|int|real|any|void)\b', Keyword.Type),
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# "from" is not a keyword unless used with import
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(r'(import)(\s+)(\*)([^\S\n]+)(from)\b',
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bygroups(Keyword.Namespace, Text, Punctuation, Text, Keyword.Namespace)),
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(r'(import)(\s+)([a-zA-Z_]\w*)([^\S\n]+)(from)\b',
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bygroups(Keyword.Namespace, Text, Name, Text, Keyword.Namespace)),
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(r'(package|import)\b', Keyword.Namespace),
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# standard library: https://github.com/Whiley/WhileyLibs/
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(words((
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# types defined in whiley.lang.Int
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'i8', 'i16', 'i32', 'i64',
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'u8', 'u16', 'u32', 'u64',
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'uint', 'nat',
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# whiley.lang.Any
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'toString'), suffix=r'\b'), Name.Builtin),
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# byte literal
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(r'[01]+b', Number.Bin),
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# decimal literal
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(r'[0-9]+\.[0-9]+', Number.Float),
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# match "1." but not ranges like "3..5"
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(r'[0-9]+\.(?!\.)', Number.Float),
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# integer literal
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(r'0x[0-9a-fA-F]+', Number.Hex),
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(r'[0-9]+', Number.Integer),
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# character literal
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(r"""'[^\\]'""", String.Char),
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(r"""(')(\\['"\\btnfr])(')""",
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bygroups(String.Char, String.Escape, String.Char)),
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# string literal
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(r'"', String, 'string'),
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# operators and punctuation
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(r'[{}()\[\],.;]', Punctuation),
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(r'[+\-*/%&|<>^!~@=:?'
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# unicode operators
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r'\u2200\u2203\u2205\u2282\u2286\u2283\u2287'
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r'\u222A\u2229\u2264\u2265\u2208\u2227\u2228'
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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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],
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'string': [
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(r'"', String, '#pop'),
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(r'\\[btnfr]', String.Escape),
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(r'\\u[0-9a-fA-F]{4}', String.Escape),
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(r'\\.', String),
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(r'[^\\"]+', String),
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],
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}
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