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242 lines
8.4 KiB
Python
242 lines
8.4 KiB
Python
"""
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pygments.lexers.lean
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~~~~~~~~~~~~~~~~~~~~
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Lexers for the Lean theorem prover.
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:copyright: Copyright 2006-present by the Pygments team, see AUTHORS.
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:license: BSD, see LICENSE for details.
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"""
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import re
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from pygments.lexer import RegexLexer, words, include
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from pygments.token import Comment, Operator, Keyword, Name, String, \
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Number, Generic, Whitespace
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__all__ = ['Lean3Lexer', 'Lean4Lexer']
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class Lean3Lexer(RegexLexer):
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"""
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For the Lean 3 theorem prover.
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"""
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name = 'Lean'
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url = 'https://leanprover-community.github.io/lean3'
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aliases = ['lean', 'lean3']
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filenames = ['*.lean']
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mimetypes = ['text/x-lean', 'text/x-lean3']
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version_added = '2.0'
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# from https://github.com/leanprover/vscode-lean/blob/1589ca3a65e394b3789409707febbd2d166c9344/syntaxes/lean.json#L186C20-L186C217
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_name_segment = (
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"(?![λΠΣ])[_a-zA-Zα-ωΑ-Ωϊ-ϻἀ-῾℀-⅏𝒜-𝖟]"
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"(?:(?![λΠΣ])[_a-zA-Zα-ωΑ-Ωϊ-ϻἀ-῾℀-⅏𝒜-𝖟0-9'ⁿ-₉ₐ-ₜᵢ-ᵪ])*")
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_name = _name_segment + r"(\." + _name_segment + r")*"
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tokens = {
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'expression': [
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(r'\s+', Whitespace),
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(r'/--', String.Doc, 'docstring'),
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(r'/-', Comment, 'comment'),
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(r'--.*?$', Comment.Single),
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(words((
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'forall', 'fun', 'Pi', 'from', 'have', 'show', 'assume', 'suffices',
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'let', 'if', 'else', 'then', 'in', 'with', 'calc', 'match',
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'do'
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), prefix=r'\b', suffix=r'\b'), Keyword),
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(words(('sorry', 'admit'), prefix=r'\b', suffix=r'\b'), Generic.Error),
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(words(('Sort', 'Prop', 'Type'), prefix=r'\b', suffix=r'\b'), Keyword.Type),
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(words((
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'(', ')', ':', '{', '}', '[', ']', '⟨', '⟩', '‹', '›', '⦃', '⦄', ':=', ',',
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)), Operator),
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(_name, Name),
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(r'``?' + _name, String.Symbol),
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(r'0x[A-Za-z0-9]+', Number.Integer),
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(r'0b[01]+', Number.Integer),
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(r'\d+', Number.Integer),
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(r'"', String.Double, 'string'),
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(r"'(?:(\\[\\\"'nt])|(\\x[0-9a-fA-F]{2})|(\\u[0-9a-fA-F]{4})|.)'", String.Char),
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(r'[~?][a-z][\w\']*:', Name.Variable),
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(r'\S', Name.Builtin.Pseudo),
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],
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'root': [
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(words((
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'import', 'renaming', 'hiding',
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'namespace',
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'local',
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'private', 'protected', 'section',
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'include', 'omit', 'section',
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'protected', 'export',
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'open',
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'attribute',
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), prefix=r'\b', suffix=r'\b'), Keyword.Namespace),
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(words((
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'lemma', 'theorem', 'def', 'definition', 'example',
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'axiom', 'axioms', 'constant', 'constants',
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'universe', 'universes',
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'inductive', 'coinductive', 'structure', 'extends',
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'class', 'instance',
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'abbreviation',
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'noncomputable theory',
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'noncomputable', 'mutual', 'meta',
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'attribute',
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'parameter', 'parameters',
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'variable', 'variables',
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'reserve', 'precedence',
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'postfix', 'prefix', 'notation', 'infix', 'infixl', 'infixr',
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'begin', 'by', 'end',
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'set_option',
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'run_cmd',
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), prefix=r'\b', suffix=r'\b'), Keyword.Declaration),
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(r'@\[', Keyword.Declaration, 'attribute'),
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(words((
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'#eval', '#check', '#reduce', '#exit',
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'#print', '#help',
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), suffix=r'\b'), Keyword),
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include('expression')
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],
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'attribute': [
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(r'\]', Keyword.Declaration, '#pop'),
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include('expression'),
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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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'docstring': [
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(r'[^/-]+', String.Doc),
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(r'-/', String.Doc, '#pop'),
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(r'[/-]', String.Doc)
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],
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'string': [
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(r'[^\\"]+', String.Double),
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(r"(?:(\\[\\\"'nt])|(\\x[0-9a-fA-F]{2})|(\\u[0-9a-fA-F]{4}))", String.Escape),
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('"', String.Double, '#pop'),
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],
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}
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def analyse_text(text):
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if re.search(r'^import [a-z]', text, re.MULTILINE):
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return 0.1
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LeanLexer = Lean3Lexer
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class Lean4Lexer(RegexLexer):
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"""
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For the Lean 4 theorem prover.
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"""
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name = 'Lean4'
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url = 'https://github.com/leanprover/lean4'
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aliases = ['lean4']
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filenames = ['*.lean']
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mimetypes = ['text/x-lean4']
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version_added = '2.18'
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# same as Lean3Lexer, with `!` and `?` allowed
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_name_segment = (
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"(?![λΠΣ])[_a-zA-Zα-ωΑ-Ωϊ-ϻἀ-῾℀-⅏𝒜-𝖟]"
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"(?:(?![λΠΣ])[_a-zA-Zα-ωΑ-Ωϊ-ϻἀ-῾℀-⅏𝒜-𝖟0-9'ⁿ-₉ₐ-ₜᵢ-ᵪ!?])*")
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_name = _name_segment + r"(\." + _name_segment + r")*"
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keywords1 = (
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'import', 'unif_hint',
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'renaming', 'inline', 'hiding', 'lemma', 'variable',
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'theorem', 'axiom', 'inductive', 'structure', 'universe', 'alias',
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'#help', 'precedence', 'postfix', 'prefix',
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'infix', 'infixl', 'infixr', 'notation', '#eval',
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'#check', '#reduce', '#exit', 'end', 'private', 'using', 'namespace',
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'instance', 'section', 'protected',
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'export', 'set_option', 'extends', 'open', 'example',
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'#print', 'opaque',
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'def', 'macro', 'elab', 'syntax', 'macro_rules', '#reduce', 'where',
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'abbrev', 'noncomputable', 'class', 'attribute', '#synth', 'mutual',
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'scoped', 'local',
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)
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keywords2 = (
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'forall', 'fun', 'obtain', 'from', 'have', 'show', 'assume',
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'let', 'if', 'else', 'then', 'by', 'in', 'with',
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'calc', 'match', 'nomatch', 'do', 'at',
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)
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keywords3 = (
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# Sorts
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'Type', 'Prop', 'Sort',
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)
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operators = (
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'!=', '#', '&', '&&', '*', '+', '-', '/', '@', '!',
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'-.', '->', '.', '..', '...', '::', ':>', ';', ';;', '<',
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'<-', '=', '==', '>', '_', '|', '||', '~', '=>', '<=', '>=',
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'/\\', '\\/', '∀', 'Π', 'λ', '↔', '∧', '∨', '≠', '≤', '≥',
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'¬', '⁻¹', '⬝', '▸', '→', '∃', '≈', '×', '⌞',
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'⌟', '≡', '⟨', '⟩', "↦",
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)
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punctuation = ('(', ')', ':', '{', '}', '[', ']', '⦃', '⦄',
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':=', ',', ']\'', ']?', ']!')
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tokens = {
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'expression': [
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(r'\s+', Whitespace),
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(r'/--', String.Doc, 'docstring'),
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(r'/-', Comment, 'comment'),
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(r'--.*$', Comment.Single),
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(words(keywords3, prefix=r'\b', suffix=r'\b'), Keyword.Type),
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(words(('sorry', 'admit'), prefix=r'\b', suffix=r'\b'), Generic.Error),
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(words(operators), Name.Builtin.Pseudo),
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(words(punctuation), Operator),
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(_name_segment, Name),
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(r'``?' + _name, String.Symbol),
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(r'(?<=\.)\d+', Number),
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(r'(\d+\.\d*)([eE][+-]?[0-9]+)?', Number.Float),
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(r'\d+', Number.Integer),
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(r'"', String.Double, 'string'),
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(r'[~?][a-z][\w\']*:', Name.Variable),
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(r'\S', Name.Builtin.Pseudo),
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],
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'root': [
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(words(keywords1, prefix=r'\b', suffix=r'\b'), Keyword.Namespace),
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(words(keywords2, prefix=r'\b', suffix=r'\b'), Keyword),
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(r'@\[', Keyword.Declaration, 'attribute'),
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include('expression')
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],
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'attribute': [
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(r'\]', Keyword.Declaration, '#pop'),
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include('expression'),
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],
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'comment': [
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# Multiline Comments
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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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'docstring': [
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(r'[^/-]+', String.Doc),
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(r'-/', String.Doc, '#pop'),
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(r'[/-]', String.Doc)
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],
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'string': [
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(r'[^\\"]+', String.Double),
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(r'\\[n"\\\n]', String.Escape),
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('"', String.Double, '#pop'),
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],
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}
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def analyse_text(text):
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if re.search(r'^import [A-Z]', text, re.MULTILINE):
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return 0.1
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