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Quelle  lean.py   Sprache: Python

 
"""
    pygments.lexers.lean
    ~~~~~~~~~~~~~~~~~~~~

    Lexers for the Lean theorem prover.

    :copyright: Copyright 2006-2024 by the Pygments team, see AUTHORS.
    :license: BSD, see LICENSE for details.
"""

import re

from pygments.lexer import RegexLexer, words, include
from pygments.token import Comment, Operator, Keyword, Name, String, \
    Number, Generic, Whitespace

__all__ = ['Lean3Lexer''Lean4Lexer']

class Lean3Lexer(RegexLexer):
    """
    For the Lean 3 theorem prover.
    """
    name = 'Lean'
    url = 'https://leanprover-community.github.io/lean3'
    aliases = ['lean''lean3']
    filenames = ['*.lean']
    mimetypes = ['text/x-lean''text/x-lean3']
    version_added = '2.0'

    # from https://github.com/leanprover/vscode-lean/blob/1589ca3a65e394b3789409707febbd2d166c9344/syntaxes/lean.json#L186C20-L186C217
    _name_segment = (
        "(?![λΠΣ])[_a-zA-Zα-ωΑ-Ωϊ-ϻἀ-῾℀-⅏𝒜-𝖟]"
        "(?:(?![λΠΣ])[_a-zA-Zα-ωΑ-Ωϊ-ϻἀ-῾℀-⅏𝒜-𝖟0-9'ⁿ-₉ₐ-ₜᵢ-ᵪ])*")
    _name = _name_segment + r"(\." + _name_segment + r")*"

    tokens = {
        'expression': [
            (r'\s+', Whitespace),
            (r'/--', String.Doc, 'docstring'),
            (r'/-', Comment, 'comment'),
            (r'--.*?$', Comment.Single),
            (words((
                    'forall''fun''Pi''from''have''show''assume''suffices',
                    'let''if''else''then''in''with''calc''match',
                    'do'
                ), prefix=r'\b', suffix=r'\b'), Keyword),
            (words(('sorry''admit'), prefix=r'\b', suffix=r'\b'), Generic.Error),
            (words(('Sort''Prop''Type'), prefix=r'\b', suffix=r'\b'), Keyword.Type),
            (words((
                '('')'':''{''}''['']''⟨''⟩''‹''›''⦃''⦄'':='',',
            )), Operator),
            (_name, Name),
            (r'``?' + _name, String.Symbol),
            (r'0x[A-Za-z0-9]+', Number.Integer),
            (r'0b[01]+', Number.Integer),
            (r'\d+', Number.Integer),
            (r'"', String.Double, 'string'),
            (r"'(?:(\\[\\\"'nt])|(\\x[0-9a-fA-F]{2})|(\\u[0-9a-fA-F]{4})|.)'", String.Char),
            (r'[~?][a-z][\w\']*:', Name.Variable),
            (r'\S', Name.Builtin.Pseudo),
        ],
        'root': [
            (words((
                'import''renaming''hiding',
                'namespace',
                'local',
                'private''protected''section',
                'include''omit''section',
                'protected''export',
                'open',
                'attribute',
            ), prefix=r'\b', suffix=r'\b'), Keyword.Namespace),
            (words((
                'lemma''theorem''def''definition''example',
                'axiom''axioms''constant''constants',
                'universe''universes',
                'inductive''coinductive''structure''extends',
                'class''instance',
                'abbreviation',

                'noncomputable theory',

                'noncomputable''mutual''meta',

                'attribute',

                'parameter''parameters',
                'variable''variables',

                'reserve''precedence',
                'postfix''prefix''notation''infix''infixl''infixr',

                'begin''by''end',

                'set_option',
                'run_cmd',
            ), prefix=r'\b', suffix=r'\b'), Keyword.Declaration),
            (r'@\[', Keyword.Declaration, 'attribute'),
            (words((
                '#eval', '#check', '#reduce', '#exit',
                '#print', '#help',
            ), suffix=r'\b'), Keyword),
            include('expression')
        ],
        'attribute': [
            (r'\]', Keyword.Declaration, '#pop'),
            include('expression'),
        ],
        'comment': [
            (r'[^/-]+', Comment.Multiline),
            (r'/-', Comment.Multiline, '#push'),
            (r'-/', Comment.Multiline, '#pop'),
            (r'[/-]', Comment.Multiline)
        ],
        'docstring': [
            (r'[^/-]+', String.Doc),
            (r'-/', String.Doc, '#pop'),
            (r'[/-]', String.Doc)
        ],
        'string': [
            (r'[^\\"]+', String.Double),
            (r"(?:(\\[\\\"'nt])|(\\x[0-9a-fA-F]{2})|(\\u[0-9a-fA-F]{4}))", String.Escape),
            ('"', String.Double, '#pop'),
        ],
    }

    def analyse_text(text):
        if re.search(r'^import [a-z]', text, re.MULTILINE):
            return 0.1


LeanLexer = Lean3Lexer


class Lean4Lexer(RegexLexer):
    """
    For the Lean 4 theorem prover.
    """
    
    name = 'Lean4'
    url = 'https://github.com/leanprover/lean4'
    aliases = ['lean4']
    filenames = ['*.lean']
    mimetypes = ['text/x-lean4']
    version_added = '2.18'

    # same as Lean3Lexer, with `!` and `?` allowed
    _name_segment = (
        "(?![λΠΣ])[_a-zA-Zα-ωΑ-Ωϊ-ϻἀ-῾℀-⅏𝒜-𝖟]"
        "(?:(?![λΠΣ])[_a-zA-Zα-ωΑ-Ωϊ-ϻἀ-῾℀-⅏𝒜-𝖟0-9'ⁿ-₉ₐ-ₜᵢ-ᵪ!?])*")
    _name = _name_segment + r"(\." + _name_segment + r")*"

    keywords1 = (
        'import''unif_hint',
        'renaming''inline''hiding''lemma''variable',
        'theorem''axiom''inductive''structure''universe''alias',
        '#help', 'precedence', 'postfix', 'prefix',
        'infix''infixl''infixr''notation''#eval',
        '#check', '#reduce', '#exit', 'end', 'private', 'using', 'namespace',
        'instance''section''protected',
        'export''set_option''extends''open''example',
        '#print', 'opaque',
        'def''macro''elab''syntax''macro_rules''#reduce', 'where',
        'abbrev''noncomputable''class''attribute''#synth', 'mutual',
        'scoped''local',
    )

    keywords2 = (
        'forall''fun''obtain''from''have''show''assume',
        'let''if''else''then''by''in''with',
        'calc''match''nomatch''do''at',
    )

    keywords3 = (
        # Sorts
        'Type''Prop''Sort',
    )

    operators = (
        '!=''#', '&', '&&', '*', '+', '-', '/', '@', '!',
        '-.''->''.''..''...''::'':>'';'';;''<',
        '<-''=''==''>''_''|''||''~''=>''<=''>=',
        '/\\''\\/''∀''Π''λ''↔''∧''∨''≠''≤''≥',
        '¬''⁻¹''⬝''▸''→''∃''≈''×''⌞',
        '⌟''≡''⟨''⟩'"↦",
    )

    punctuation = ('('')'':''{''}''['']''⦃''⦄',
                   ':='',')

    tokens = {
        'expression': [
            (r'\s+', Whitespace),
            (r'/--', String.Doc, 'docstring'),
            (r'/-', Comment, 'comment'),
            (r'--.*$', Comment.Single),
            (words(keywords3, prefix=r'\b', suffix=r'\b'), Keyword.Type),
            (words(('sorry''admit'), prefix=r'\b', suffix=r'\b'), Generic.Error),
            (words(operators), Name.Builtin.Pseudo),
            (words(punctuation), Operator),
            (_name_segment, Name),
            (r'``?' + _name, String.Symbol),
            (r'(?<=\.)\d+', Number),
            (r'(\d+\.\d*)([eE][+-]?[0-9]+)?', Number.Float),
            (r'\d+', Number.Integer),
            (r'"', String.Double, 'string'),
            (r'[~?][a-z][\w\']*:', Name.Variable),
            (r'\S', Name.Builtin.Pseudo),
        ],
        'root': [
            (words(keywords1, prefix=r'\b', suffix=r'\b'), Keyword.Namespace),
            (words(keywords2, prefix=r'\b', suffix=r'\b'), Keyword),
            (r'@\[', Keyword.Declaration, 'attribute'),
            include('expression')
        ],
        'attribute': [
            (r'\]', Keyword.Declaration, '#pop'),
            include('expression'),
        ],
        'comment': [
            # Multiline Comments
            (r'[^/-]+', Comment.Multiline),
            (r'/-', Comment.Multiline, '#push'),
            (r'-/', Comment.Multiline, '#pop'),
            (r'[/-]', Comment.Multiline)
        ],
        'docstring': [
            (r'[^/-]+', String.Doc),
            (r'-/', String.Doc, '#pop'),
            (r'[/-]', String.Doc)
        ],
        'string': [
            (r'[^\\"]+', String.Double),
            (r'\\[n"\\\n]', String.Escape),
            ('"', String.Double, '#pop'),
        ],
    }

    def analyse_text(text):
        if re.search(r'^import [A-Z]', text, re.MULTILINE):
            return 0.1

Messung V0.5
C=90 H=60 G=76

¤ Dauer der Verarbeitung: 0.5 Sekunden  ¤

*© Formatika GbR, Deutschland






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