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
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
|
#include "token.h"
#include <stdio.h>
#include <stddef.h>
#include "hmap.h"
static struct hmap *keywords = NULL;
static const char *keys[] = {
"fn",
"let",
"true",
"false",
"if",
"else",
"return",
NULL,
};
enum token_type values[] = {
TOKEN_FUNC,
TOKEN_LET,
TOKEN_TRUE,
TOKEN_FALSE,
TOKEN_IF,
TOKEN_ELSE,
TOKEN_RETURN,
TOKEN_EOF,
};
const char *token_types[] = {
"ILLEGAL",
"EOF",
/* Identifiers/Literals */
"identifier",
"int",
/* Operators */
"=",
"+",
"-",
"!",
"*",
"/",
"<",
">",
"==",
"!=",
/* Delimiters */
",",
";",
"(",
")",
"{",
"}",
/* Keywords */
"fn",
"let",
"true",
"false",
"if",
"else",
"return",
};
void
token_init_keywords(void)
{
if (keywords == NULL) {
keywords = hmap_new();
for (size_t i = 0; keys[i] != NULL; i++) {
hmap_set(keywords, keys[i], values + i);
}
}
}
enum token_type
token_lookup_ident(const struct slice *ident)
{
enum token_type *t = hmap_gets(keywords, ident);
if (t) {
return *t;
}
return TOKEN_IDENT;
}
extern inline const char *
token_type_print(enum token_type t)
{
return token_types[t];
}
char *
token_sprint(struct token *token, char *str)
{
const char *type = token_type_print(token->type);
char slicebuf[256];
sprintf(str, "TOKEN: type: %s, literal: %s", type,
slice_sprint(&token->literal, slicebuf));
return str;
}
void
token_free_keywords(void)
{
hmap_free(keywords);
}
|
