LanguageLexer/gpp_lexer.l at master · halilkosee/LanguageLexer · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89

;* 161044105 HALİL İBRAHİM KÖSE  *

 #include <ctype.h>

%{
int 	EXIT = 0;
%}

keywords("and"|"or"|"not"|"equal"|"less"|"nil"|"list"|"append"|"concat"|"set"|"deffun"|"for"|"if"|"exit"|"load"|"disp"|"true"|"false")

value_zero([ 0 ])

value([1-9][0-9]*)

id([a-zA-Z][a-zA-Z0-9]*" "*)

operators("+"|"-"|"/"|"*"|"("|")"|"**"|",")


/*** Rule Section has three rules ***/

%%


"+"  {printf("OP_PLUS\n");}
"-"  {printf("OP_MINUS\n");}
"/"	 {printf("OP_DIV\n");}
"*"  {printf("OP_MULT\n");}
"("  {printf("OP_OP\n");}
")"  {printf("OP_CP\n");}
"\"" {printf("OP_CO\n");}
"**" {printf("OP_DBLMULT\n");}
","  {printf("OP_COMMA\n");}
"“" {printf("OP_CO\n");}
"”" {printf("OP_CC\n");}
;;.* {printf("COMMENT\n");}

{keywords}" "+ {printf("KW_");
				if(!(strncmp(yytext, "exit", 4)))
					EXIT = 1;
				while(yytext[0])
					printf("%c", yytext++[0]-32);
				printf("\n");

				if(EXIT){
					printf("EXIT\n");
					return 0;
				}}


{id}				{
						printf("IDENTIFIER\n");
					}


{value}				{
						printf("VALUE\n");
					}

{value_zero}
{
						printf("VALUE\n");
					}

[ \t\n]+				{}


{value}{id}			{
						printf("SYNTAX_ERROR %s\n", yytext);
					}


.	 				{
						printf("SYNTAX_ERROR %s\n", yytext);
					}
<<EOF>>		{return 0;}
%%


int yywrap(){}
int main(){


yylex();

return 0;
}