--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ply-3.8/example/ansic/clex.py	Wed Mar 23 02:40:16 2016 +0000
@@ -0,0 +1,164 @@
+# ----------------------------------------------------------------------
+# clex.py
+#
+# A lexer for ANSI C.
+# ----------------------------------------------------------------------
+
+import sys
+sys.path.insert(0,"../..")
+
+import ply.lex as lex
+
+# Reserved words
+reserved = (
+    'AUTO', 'BREAK', 'CASE', 'CHAR', 'CONST', 'CONTINUE', 'DEFAULT', 'DO', 'DOUBLE',
+    'ELSE', 'ENUM', 'EXTERN', 'FLOAT', 'FOR', 'GOTO', 'IF', 'INT', 'LONG', 'REGISTER',
+    'RETURN', 'SHORT', 'SIGNED', 'SIZEOF', 'STATIC', 'STRUCT', 'SWITCH', 'TYPEDEF',
+    'UNION', 'UNSIGNED', 'VOID', 'VOLATILE', 'WHILE',
+    )
+
+tokens = reserved + (
+    # Literals (identifier, integer constant, float constant, string constant, char const)
+    'ID', 'TYPEID', 'ICONST', 'FCONST', 'SCONST', 'CCONST',
+
+    # Operators (+,-,*,/,%,|,&,~,^,<<,>>, ||, &&, !, <, <=, >, >=, ==, !=)
+    'PLUS', 'MINUS', 'TIMES', 'DIVIDE', 'MOD',
+    'OR', 'AND', 'NOT', 'XOR', 'LSHIFT', 'RSHIFT',
+    'LOR', 'LAND', 'LNOT',
+    'LT', 'LE', 'GT', 'GE', 'EQ', 'NE',
+    
+    # Assignment (=, *=, /=, %=, +=, -=, <<=, >>=, &=, ^=, |=)
+    'EQUALS', 'TIMESEQUAL', 'DIVEQUAL', 'MODEQUAL', 'PLUSEQUAL', 'MINUSEQUAL',
+    'LSHIFTEQUAL','RSHIFTEQUAL', 'ANDEQUAL', 'XOREQUAL', 'OREQUAL',
+
+    # Increment/decrement (++,--)
+    'PLUSPLUS', 'MINUSMINUS',
+
+    # Structure dereference (->)
+    'ARROW',
+
+    # Conditional operator (?)
+    'CONDOP',
+    
+    # Delimeters ( ) [ ] { } , . ; :
+    'LPAREN', 'RPAREN',
+    'LBRACKET', 'RBRACKET',
+    'LBRACE', 'RBRACE',
+    'COMMA', 'PERIOD', 'SEMI', 'COLON',
+
+    # Ellipsis (...)
+    'ELLIPSIS',
+    )
+
+# Completely ignored characters
+t_ignore           = ' \t\x0c'
+
+# Newlines
+def t_NEWLINE(t):
+    r'\n+'
+    t.lexer.lineno += t.value.count("\n")
+    
+# Operators
+t_PLUS             = r'\+'
+t_MINUS            = r'-'
+t_TIMES            = r'\*'
+t_DIVIDE           = r'/'
+t_MOD              = r'%'
+t_OR               = r'\|'
+t_AND              = r'&'
+t_NOT              = r'~'
+t_XOR              = r'\^'
+t_LSHIFT           = r'<<'
+t_RSHIFT           = r'>>'
+t_LOR              = r'\|\|'
+t_LAND             = r'&&'
+t_LNOT             = r'!'
+t_LT               = r'<'
+t_GT               = r'>'
+t_LE               = r'<='
+t_GE               = r'>='
+t_EQ               = r'=='
+t_NE               = r'!='
+
+# Assignment operators
+
+t_EQUALS           = r'='
+t_TIMESEQUAL       = r'\*='
+t_DIVEQUAL         = r'/='
+t_MODEQUAL         = r'%='
+t_PLUSEQUAL        = r'\+='
+t_MINUSEQUAL       = r'-='
+t_LSHIFTEQUAL      = r'<<='
+t_RSHIFTEQUAL      = r'>>='
+t_ANDEQUAL         = r'&='
+t_OREQUAL          = r'\|='
+t_XOREQUAL         = r'\^='
+
+# Increment/decrement
+t_PLUSPLUS         = r'\+\+'
+t_MINUSMINUS       = r'--'
+
+# ->
+t_ARROW            = r'->'
+
+# ?
+t_CONDOP           = r'\?'
+
+# Delimeters
+t_LPAREN           = r'\('
+t_RPAREN           = r'\)'
+t_LBRACKET         = r'\['
+t_RBRACKET         = r'\]'
+t_LBRACE           = r'\{'
+t_RBRACE           = r'\}'
+t_COMMA            = r','
+t_PERIOD           = r'\.'
+t_SEMI             = r';'
+t_COLON            = r':'
+t_ELLIPSIS         = r'\.\.\.'
+
+# Identifiers and reserved words
+
+reserved_map = { }
+for r in reserved:
+    reserved_map[r.lower()] = r
+
+def t_ID(t):
+    r'[A-Za-z_][\w_]*'
+    t.type = reserved_map.get(t.value,"ID")
+    return t
+
+# Integer literal
+t_ICONST = r'\d+([uU]|[lL]|[uU][lL]|[lL][uU])?'
+
+# Floating literal
+t_FCONST = r'((\d+)(\.\d+)(e(\+|-)?(\d+))? | (\d+)e(\+|-)?(\d+))([lL]|[fF])?'
+
+# String literal
+t_SCONST = r'\"([^\\\n]|(\\.))*?\"'
+
+# Character constant 'c' or L'c'
+t_CCONST = r'(L)?\'([^\\\n]|(\\.))*?\''
+
+# Comments
+def t_comment(t):
+    r'/\*(.|\n)*?\*/'
+    t.lexer.lineno += t.value.count('\n')
+
+# Preprocessor directive (ignored)
+def t_preprocessor(t):
+    r'\#(.)*?\n'
+    t.lexer.lineno += 1
+    
+def t_error(t):
+    print("Illegal character %s" % repr(t.value[0]))
+    t.lexer.skip(1)
+    
+lexer = lex.lex()
+if __name__ == "__main__":
+    lex.runmain(lexer)
+
+    
+
+
+