source: code/trunk/vendor/modernc.org/cc/v3/lexer.l@ 822

%{
// Copyright 2019 The CC Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
%}

%yyc c
%yyn c = s.next()
%yym s.mark = len(s.charBuf)

%{
package cc // import "modernc.org/cc/v3"

func (s *scanner) scan() (r rune) {
%}

c-char                          [^'\n\x80\\]|{escape-sequence}
c-char-sequence                 {c-char}+
character-constant              '{c-char-sequence}'
comment                         "/*"([^*\x80]|\*+[^*/\x80])*\*+\/
comment-not-terminated          "/*"([^*\x80]|\*+[^*/\x80])*(\*+)?\n\x80
digit                           [0-9]
escape-sequence                 {simple-sequence}|{octal-escape-sequence}|{hexadecimal-escape-sequence}|{universal-character-name}
hex-quad                        {hexadecimal-digit}{hexadecimal-digit}{hexadecimal-digit}{hexadecimal-digit}
hexadecimal-digit               [0-9a-fA-F]
hexadecimal-escape-sequence     \\x{hexadecimal-digit}+
identifier                      {identifier-nondigit}({identifier-nondigit}|{digit}|"$")*
identifier-nondigit             {nondigit}|"$"|{universal-character-name}
line-comment                    "//"[^\n\x80]*
nondigit                        [_a-zA-Z\x81]
octal-digit                     [0-7]
octal-escape-sequence           \\{octal-digit}{octal-digit}?{octal-digit}?
pp-number                       ({digit}|\.{digit})({digit}|{identifier-nondigit}|[eEpP]{sign}|\.)*
s-char                          [^\x22\n\x80\\]|{escape-sequence}
s-char-sequence                 {s-char}+
sign                            [-+]
simple-sequence                 \\['\x22?\\abefnrtv]
string-literal                  \x22{s-char-sequence}?\x22
universal-character-name        \\u{hex-quad}|\\U{hex-quad}{hex-quad}
white-space                     [ \t\f\v]

%%
                        c := s.initScan()

({white-space}|{comment})*{line-comment}        |
({white-space}|{comment})+{line-comment}?
                        return ' '

(({white-space}|{comment})*{comment-not-terminated})+
                        return s.unterminatedComment()

"!="                    return NEQ
"##"                    return PPPASTE
"%:"                    return '#'
"%:%:"                  return PPPASTE
"%="                    return MODASSIGN
"%>"                    return '}'
"&&"                    return ANDAND
"&="                    return ANDASSIGN
"*="                    return MULASSIGN
"++"                    return INC
"+="                    return ADDASSIGN
"--"                    return DEC
"-="                    return SUBASSIGN
"->"                    return ARROW
"..."                   return DDD
"/="                    return DIVASSIGN
":>"                    return ']'
"<%"                    return '{'
"<:"                    return '['
"<<"                    return LSH
"<<="                   return LSHASSIGN
"<="                    return LEQ
"=="                    return EQ
">="                    return GEQ
">>"                    return RSH
">>="                   return RSHASSIGN
"^="                    return XORASSIGN
"|="                    return ORASSIGN
"||"                    return OROR

L{string-literal}       return LONGSTRINGLITERAL
L{character-constant}   return LONGCHARCONST
{character-constant}    return CHARCONST
{identifier}            return IDENTIFIER
{pp-number}             return PPNUMBER
{string-literal}        return STRINGLITERAL

\r?\n                   return '\n'

%%
        if c, ok := s.abort(); ok {
                return rune(c)
        }
        
        goto yyAction
}