1 files changed, 80 insertions, 0 deletions
diff --git a/pygments/lexers/snobol_lexer.py b/pygments/lexers/snobol_lexer.py
new file mode 100644
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+++ b/pygments/lexers/snobol_lexer.py
@@ -0,0 +1,80 @@
+# -*- coding: utf-8 -*-
+"""
+    pygments.lexers.snobol_lexer
+    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+    Just one lone lexer (SNOBOL4)
+
+    :copyright: Copyright 2011 by Martin Harriman
+    :license: BSD, see LICENSE for details.
+"""
+
+from pygments.lexer import RegexLexer, bygroups
+from pygments.token import *
+
+__all__ = ['SnobolLexer']
+
+class SnobolLexer(RegexLexer):
+    """
+    Lexer for the SNOBOL4 programming language
+
+    Recognizes the common ASCII equivalents of the original SNOBOL4 operators.
+    Does not require spaces around binary operators.
+    """
+
+    name = "Snobol"
+    aliases = ["snobol"]
+    filenames = ['*.snobol']
+    
+    tokens = {
+        # root state, start of line
+        # comments, continuation lines, and directives start in column 1
+        # as do labels
+        'root': [
+            (r'\*.*\n', Comment),
+            (r'[\+\.] ', Punctuation, 'statement'),
+            (r'-.*\n', Comment),
+            (r'END\s*\n', Name.Label, 'heredoc'),
+            (r'[A-Za-z\$][\w$]*', Name.Label, 'statement'),
+            (r'\s+', Whitespace, 'statement'),
+        ],
+        # statement state, line after continuation or label
+        'statement': [
+            (r'\s*\n', Whitespace, '#pop'),
+            (r'\s+', Whitespace),
+            (r'(?<=[^\w.])(LT|LE|EQ|NE|GE|GT|INTEGER|IDENT|DIFFER|LGT|SIZE|'
+             r'REPLACE|TRIM|DUPL|REMDR|DATE|TIME|EVAL|APPLY|OPSYN|LOAD|UNLOAD|'
+             r'LEN|SPAN|BREAK|ANY|NOTANY|TAB|RTAB|REM|POS|RPOS|FAIL|FENCE|'
+             r'ABORT|ARB|ARBNO|BAL|SUCCEED|INPUT|OUTPUT|TERMINAL)(?=[^\w.])',
+             Name.Builtin),
+            (r'[A-Za-z][\w\.]*', Name),
+            # ASCII equivalents of original operators
+            # | for the EBCDIC equivalent, ! likewise
+            # \ for EBCDIC negation
+            (r'\*\*|[\?\$\.!%\*/#+\-@\|&\\!=]', Operator),
+            (r'"[^"]*"', String),
+            (r"'[^']*'", String),
+            # Accept SPITBOL syntax for real numbers
+            # as well as Macro SNOBOL4
+            (r'[0-9]+(?=[^\.EeDd])', Number.Integer),
+            (r'[0-9]+(\.[0-9]*)?([EDed][-+]?[0-9]+)?', Number.Float),
+            # Goto
+            (r':', Punctuation, 'goto'),
+            (r'[\(\)<>,;]', Punctuation),
+        ],
+        # Goto block
+        'goto': [
+            (r'\s*\n', Whitespace, "#pop:2"),
+            (r'\s+', Whitespace),
+            (r'F|S', Keyword),
+            (r'(\()([A-Za-z][\w.]*)(\))',
+             bygroups(Punctuation, Name.Label, Punctuation))
+        ],
+        # everything after the END statement is basically one
+        # big heredoc.
+        'heredoc': [
+            (r'.*\n', String.Heredoc)
+        ]
+    }
+
+