miniroon

commit 79236ea87082ff76badfc09257a037b72b9c8655
parent 04ac4016e6cc410962e332aa9e3a5f830e41440b
Author: Jan Pobrislo <ccx@te2000.cz>
Date:   Sun, 11 May 2025 23:38:24 +0000

Pygments lexer altered to match syntax used in Prolog files.

Diffstat:
A
doc/swiprolog_lexer.py
 | 
92
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

1 file changed, 92 insertions(+), 0 deletions(-)
diff --git a/doc/swiprolog_lexer.py b/doc/swiprolog_lexer.py
@@ -0,0 +1,92 @@
+"""
+    pygments.lexers.prolog
+    ~~~~~~~~~~~~~~~~~~~~~~
+
+    Lexers for Prolog and Prolog-like languages.
+
+    :copyright: Copyright 2006-2025 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__ = ['SWIPrologLexer']
+
+T_ATOM = Name.Constant
+T_BACKTICK = String.Char
+
+class SWIPrologLexer(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'`(?:\\x[0-9a-fA-F]+\\|\\u[0-9a-fA-F]{4}|\\U[0-9a-fA-F]{8}|'
+             r'\\[0-7]+\\|\\[`\\abcefnrstv]|[^\\`])*`', T_BACKTICK),
+            (r"'(?:''|[^'])*'", T_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|will_be)\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]*',
+             T_ATOM),  # atom, characters
+            # This one includes !
+            (r'[#&*+\-./:<=>?@\\^~\u00a1-\u00bf\u2010-\u303f]+',
+             T_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