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/*===-- FileLexer.l - Scanner for TableGen Files ----------------*- C++ -*-===//
//
//
//===------------------------------------------------------------------------=*/
%option prefix="File"
%option yylineno
%option nostdinit
%option never-interactive
%option batch
%option noyywrap
%option nodefault
%option 8bit
%option outfile="Lexer.cpp"
%option ecs
%option noreject
%option noyymore
%{
#include "Record.h"
typedef std::pair<Record*, std::vector<Init*>*> SubClassRefTy;
#include "FileParser.h"
// ParseInt - This has to handle the special case of binary numbers 0b0101
static int ParseInt(const char *Str) {
if (Str[0] == '0' && Str[1] == 'b')
return strtol(Str+2, 0, 2);
return strtol(Str, 0, 0);
}
%}
Comment \/\/.*
Identifier [a-zA-Z_][0-9a-zA-Z_]*
Integer [-+]?[0-9]+|0x[0-9a-fA-F]+|0b[01]+
StringVal \"[^"]*\"
%%
{Comment} { /* Ignore comments */ }
int { return INT; }
bit { return BIT; }
bits { return BITS; }
string { return STRING; }
list { return LIST; }
class { return CLASS; }
def { return DEF; }
field { return FIELD; }
set { return SET; }
in { return IN; }
{Identifier} { Filelval.StrVal = new std::string(yytext, yytext+yyleng);
return ID; }
{StringVal} { Filelval.StrVal = new std::string(yytext+1, yytext+yyleng-1);
return STRVAL; }
{Integer} { Filelval.IntVal = ParseInt(Filetext); return INTVAL; }
[ \t\n]+ { /* Ignore whitespace */ }
. { return Filetext[0]; }
%%
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