Mini Shell
"""
pygments.lexers.prolog
~~~~~~~~~~~~~~~~~~~~~~
Lexers for Prolog and Prolog-like languages.
:copyright: Copyright 2006-2024 by the Pygments team, see AUTHORS.
:license: BSD, see LICENSE for details.
"""
import re
from pygments.lexer import RegexLexer, bygroups
from pygments.token import Text, Comment, Operator, Keyword, Name, String, \
Number, Punctuation
__all__ = ['PrologLexer', 'LogtalkLexer']
class PrologLexer(RegexLexer):
"""
Lexer for Prolog files.
"""
name = 'Prolog'
aliases = ['prolog']
filenames = ['*.ecl', '*.prolog', '*.pro', '*.pl']
mimetypes = ['text/x-prolog']
url = 'https://en.wikipedia.org/wiki/Prolog'
version_added = ''
tokens = {
'root': [
(r'/\*', Comment.Multiline, 'nested-comment'),
(r'%.*', Comment.Single),
# character literal
(r'0\'.', String.Char),
(r'0b[01]+', Number.Bin),
(r'0o[0-7]+', Number.Oct),
(r'0x[0-9a-fA-F]+', Number.Hex),
# literal with prepended base
(r'\d\d?\'[a-zA-Z0-9]+', Number.Integer),
(r'(\d+\.\d*|\d*\.\d+)([eE][+-]?[0-9]+)?', Number.Float),
(r'\d+', Number.Integer),
(r'[\[\](){}|.,;!]', Punctuation),
(r':-|-->', Punctuation),
(r'"(?:\\x[0-9a-fA-F]+\\|\\u[0-9a-fA-F]{4}|\\U[0-9a-fA-F]{8}|'
r'\\[0-7]+\\|\\["\\abcefnrstv]|[^\\"])*"', String.Double),
(r"'(?:''|[^'])*'", String.Atom), # quoted atom
# Needs to not be followed by an atom.
# (r'=(?=\s|[a-zA-Z\[])', Operator),
(r'is\b', Operator),
(r'(<|>|=<|>=|==|=:=|=|/|//|\*|\+|-)(?=\s|[a-zA-Z0-9\[])',
Operator),
(r'(mod|div|not)\b', Operator),
(r'_', Keyword), # The don't-care variable
(r'([a-z]+)(:)', bygroups(Name.Namespace, Punctuation)),
(r'([a-z\u00c0-\u1fff\u3040-\ud7ff\ue000-\uffef]'
r'[\w$\u00c0-\u1fff\u3040-\ud7ff\ue000-\uffef]*)'
r'(\s*)(:-|-->)',
bygroups(Name.Function, Text, Operator)), # function defn
(r'([a-z\u00c0-\u1fff\u3040-\ud7ff\ue000-\uffef]'
r'[\w$\u00c0-\u1fff\u3040-\ud7ff\ue000-\uffef]*)'
r'(\s*)(\()',
bygroups(Name.Function, Text, Punctuation)),
(r'[a-z\u00c0-\u1fff\u3040-\ud7ff\ue000-\uffef]'
r'[\w$\u00c0-\u1fff\u3040-\ud7ff\ue000-\uffef]*',
String.Atom), # atom, characters
# This one includes !
(r'[#&*+\-./:<=>?@\\^~\u00a1-\u00bf\u2010-\u303f]+',
String.Atom), # atom, graphics
(r'[A-Z_]\w*', Name.Variable),
(r'\s+|[\u2000-\u200f\ufff0-\ufffe\uffef]', Text),
],
'nested-comment': [
(r'\*/', Comment.Multiline, '#pop'),
(r'/\*', Comment.Multiline, '#push'),
(r'[^*/]+', Comment.Multiline),
(r'[*/]', Comment.Multiline),
],
}
def analyse_text(text):
"""Competes with IDL and Visual Prolog on *.pro"""
if ':-' in text:
# Visual Prolog also uses :-
return 0.5
else:
return 0
class LogtalkLexer(RegexLexer):
"""
For Logtalk source code.
"""
name = 'Logtalk'
url = 'http://logtalk.org/'
aliases = ['logtalk']
filenames = ['*.lgt', '*.logtalk']
mimetypes = ['text/x-logtalk']
version_added = '0.10'
tokens = {
'root': [
# Directives
(r'^\s*:-\s', Punctuation, 'directive'),
# Comments
(r'%.*?\n', Comment),
(r'/\*(.|\n)*?\*/', Comment),
# Whitespace
(r'\n', Text),
(r'\s+', Text),
# Numbers
(r"0'[\\]?.", Number),
(r'0b[01]+', Number.Bin),
(r'0o[0-7]+', Number.Oct),
(r'0x[0-9a-fA-F]+', Number.Hex),
(r'\d+\.?\d*((e|E)(\+|-)?\d+)?', Number),
# Variables
(r'([A-Z_][a-zA-Z0-9_]*)', Name.Variable),
# Event handlers
(r'(after|before)(?=[(])', Keyword),
# Message forwarding handler
(r'forward(?=[(])', Keyword),
# Execution-context methods
(r'(context|parameter|this|se(lf|nder))(?=[(])', Keyword),
# Reflection
(r'(current_predicate|predicate_property)(?=[(])', Keyword),
# DCGs and term expansion
(r'(expand_(goal|term)|(goal|term)_expansion|phrase)(?=[(])', Keyword),
# Entity
(r'(abolish|c(reate|urrent))_(object|protocol|category)(?=[(])', Keyword),
(r'(object|protocol|category)_property(?=[(])', Keyword),
# Entity relations
(r'co(mplements_object|nforms_to_protocol)(?=[(])', Keyword),
(r'extends_(object|protocol|category)(?=[(])', Keyword),
(r'imp(lements_protocol|orts_category)(?=[(])', Keyword),
(r'(instantiat|specializ)es_class(?=[(])', Keyword),
# Events
(r'(current_event|(abolish|define)_events)(?=[(])', Keyword),
# Flags
(r'(create|current|set)_logtalk_flag(?=[(])', Keyword),
# Compiling, loading, and library paths
(r'logtalk_(compile|l(ibrary_path|oad|oad_context)|make(_target_action)?)(?=[(])', Keyword),
(r'\blogtalk_make\b', Keyword),
# Database
(r'(clause|retract(all)?)(?=[(])', Keyword),
(r'a(bolish|ssert(a|z))(?=[(])', Keyword),
# Control constructs
(r'(ca(ll|tch)|throw)(?=[(])', Keyword),
(r'(fa(il|lse)|true|(instantiation|system)_error)\b', Keyword),
(r'(uninstantiation|type|domain|existence|permission|representation|evaluation|resource|syntax)_error(?=[(])', Keyword),
# All solutions
(r'((bag|set)of|f(ind|or)all)(?=[(])', Keyword),
# Multi-threading predicates
(r'threaded(_(ca(ll|ncel)|once|ignore|exit|peek|wait|notify))?(?=[(])', Keyword),
# Engine predicates
(r'threaded_engine(_(create|destroy|self|next|next_reified|yield|post|fetch))?(?=[(])', Keyword),
# Term unification
(r'(subsumes_term|unify_with_occurs_check)(?=[(])', Keyword),
# Term creation and decomposition
(r'(functor|arg|copy_term|numbervars|term_variables)(?=[(])', Keyword),
# Evaluable functors
(r'(div|rem|m(ax|in|od)|abs|sign)(?=[(])', Keyword),
(r'float(_(integer|fractional)_part)?(?=[(])', Keyword),
(r'(floor|t(an|runcate)|round|ceiling)(?=[(])', Keyword),
# Other arithmetic functors
(r'(cos|a(cos|sin|tan|tan2)|exp|log|s(in|qrt)|xor)(?=[(])', Keyword),
# Term testing
(r'(var|atom(ic)?|integer|float|c(allable|ompound)|n(onvar|umber)|ground|acyclic_term)(?=[(])', Keyword),
# Term comparison
(r'compare(?=[(])', Keyword),
# Stream selection and control
(r'(curren|se)t_(in|out)put(?=[(])', Keyword),
(r'(open|close)(?=[(])', Keyword),
(r'flush_output(?=[(])', Keyword),
(r'(at_end_of_stream|flush_output)\b', Keyword),
(r'(stream_property|at_end_of_stream|set_stream_position)(?=[(])', Keyword),
# Character and byte input/output
(r'(nl|(get|peek|put)_(byte|c(har|ode)))(?=[(])', Keyword),
(r'\bnl\b', Keyword),
# Term input/output
(r'read(_term)?(?=[(])', Keyword),
(r'write(q|_(canonical|term))?(?=[(])', Keyword),
(r'(current_)?op(?=[(])', Keyword),
(r'(current_)?char_conversion(?=[(])', Keyword),
# Atomic term processing
(r'atom_(length|c(hars|o(ncat|des)))(?=[(])', Keyword),
(r'(char_code|sub_atom)(?=[(])', Keyword),
(r'number_c(har|ode)s(?=[(])', Keyword),
# Implementation defined hooks functions
(r'(se|curren)t_prolog_flag(?=[(])', Keyword),
(r'\bhalt\b', Keyword),
(r'halt(?=[(])', Keyword),
# Message sending operators
(r'(::|:|\^\^)', Operator),
# External call
(r'[{}]', Keyword),
# Logic and control
(r'(ignore|once)(?=[(])', Keyword),
(r'\brepeat\b', Keyword),
# Sorting
(r'(key)?sort(?=[(])', Keyword),
# Bitwise functors
(r'(>>|<<|/\\|\\\\|\\)', Operator),
# Predicate aliases
(r'\bas\b', Operator),
# Arithmetic evaluation
(r'\bis\b', Keyword),
# Arithmetic comparison
(r'(=:=|=\\=|<|=<|>=|>)', Operator),
# Term creation and decomposition
(r'=\.\.', Operator),
# Term unification
(r'(=|\\=)', Operator),
# Term comparison
(r'(==|\\==|@=<|@<|@>=|@>)', Operator),
# Evaluable functors
(r'(//|[-+*/])', Operator),
(r'\b(e|pi|div|mod|rem)\b', Operator),
# Other arithmetic functors
(r'\b\*\*\b', Operator),
# DCG rules
(r'-->', Operator),
# Control constructs
(r'([!;]|->)', Operator),
# Logic and control
(r'\\+', Operator),
# Mode operators
(r'[?@]', Operator),
# Existential quantifier
(r'\^', Operator),
# Punctuation
(r'[()\[\],.|]', Text),
# Atoms
(r"[a-z][a-zA-Z0-9_]*", Text),
(r"'", String, 'quoted_atom'),
# Double-quoted terms
(r'"', String, 'double_quoted_term'),
],
'quoted_atom': [
(r"''", String),
(r"'", String, '#pop'),
(r'\\([\\abfnrtv"\']|(x[a-fA-F0-9]+|[0-7]+)\\)', String.Escape),
(r"[^\\'\n]+", String),
(r'\\', String),
],
'double_quoted_term': [
(r'""', String),
(r'"', String, '#pop'),
(r'\\([\\abfnrtv"\']|(x[a-fA-F0-9]+|[0-7]+)\\)', String.Escape),
(r'[^\\"\n]+', String),
(r'\\', String),
],
'directive': [
# Conditional compilation directives
(r'(el)?if(?=[(])', Keyword, 'root'),
(r'(e(lse|ndif))(?=[.])', Keyword, 'root'),
# Entity directives
(r'(category|object|protocol)(?=[(])', Keyword, 'entityrelations'),
(r'(end_(category|object|protocol))(?=[.])', Keyword, 'root'),
# Predicate scope directives
(r'(public|protected|private)(?=[(])', Keyword, 'root'),
# Other directives
(r'e(n(coding|sure_loaded)|xport)(?=[(])', Keyword, 'root'),
(r'in(clude|itialization|fo)(?=[(])', Keyword, 'root'),
(r'(built_in|dynamic|synchronized|threaded)(?=[.])', Keyword, 'root'),
(r'(alias|d(ynamic|iscontiguous)|m(eta_(non_terminal|predicate)|ode|ultifile)|s(et_(logtalk|prolog)_flag|ynchronized))(?=[(])', Keyword, 'root'),
(r'op(?=[(])', Keyword, 'root'),
(r'(c(alls|oinductive)|module|reexport|use(s|_module))(?=[(])', Keyword, 'root'),
(r'[a-z][a-zA-Z0-9_]*(?=[(])', Text, 'root'),
(r'[a-z][a-zA-Z0-9_]*(?=[.])', Text, 'root'),
],
'entityrelations': [
(r'(complements|extends|i(nstantiates|mp(lements|orts))|specializes)(?=[(])', Keyword),
# Numbers
(r"0'[\\]?.", Number),
(r'0b[01]+', Number.Bin),
(r'0o[0-7]+', Number.Oct),
(r'0x[0-9a-fA-F]+', Number.Hex),
(r'\d+\.?\d*((e|E)(\+|-)?\d+)?', Number),
# Variables
(r'([A-Z_][a-zA-Z0-9_]*)', Name.Variable),
# Atoms
(r"[a-z][a-zA-Z0-9_]*", Text),
(r"'", String, 'quoted_atom'),
# Double-quoted terms
(r'"', String, 'double_quoted_term'),
# End of entity-opening directive
(r'([)]\.)', Text, 'root'),
# Scope operator
(r'(::)', Operator),
# Punctuation
(r'[()\[\],.|]', Text),
# Comments
(r'%.*?\n', Comment),
(r'/\*(.|\n)*?\*/', Comment),
# Whitespace
(r'\n', Text),
(r'\s+', Text),
]
}
def analyse_text(text):
if ':- object(' in text:
return 1.0
elif ':- protocol(' in text:
return 1.0
elif ':- category(' in text:
return 1.0
elif re.search(r'^:-\s[a-z]', text, re.M):
return 0.9
else:
return 0.0
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