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
|
#ifndef _H_SYNTAX
#define _H_SYNTAX
/* TOKENS */
typedef enum {
TOKEN_SEMICOLON, /* ; */
TOKEN_EQUALS, /* = */
TOKEN_OPEN_SQ, /* [ */
TOKEN_CLOSE_SQ, /* ] */
TOKEN_OPEN_P, /* ( */
TOKEN_CLOSE_P, /* ) */
TOKEN_COMMA, /* , */
TOKEN_COLON, /* : */
TOKEN_CODE, /* code */
TOKEN_IMPORT, /* import */
TOKEN_NAME,
TOKEN_INT
} token_kind;
typedef struct {
token_kind kind;
void* var;
} token;
typedef struct token_list {
token elem;
struct token_list* rest;
} token_list;
void free_token(token*);
void free_token_list(token_list*);
/* ELEMENTS */
typedef enum {
EXPR_INT, /* var1: pointer to int */
EXPR_NAME, /* var1: pointer to char* */
EXPR_CODE, /* var1: pointer to function;
var2: pointer to unsigned char (nr. of arguments) */
EXPR_LIST, /* var1, var2: pointers to expression OR (nil) */
EXPR_TUPLE, /* var1, var2: pointers to expression */
EXPR_APP, /* var1, var2: pointers to expression */
} expr_kind;
typedef struct {
expr_kind kind;
void* var1;
void* var2;
} expression;
typedef struct arg_list {
expression elem;
struct arg_list* rest;
} arg_list;
typedef struct {
char* name;
arg_list* args;
expression rhs;
} rewrite_rule;
typedef struct fuspel {
rewrite_rule rule;
struct fuspel* rest;
} fuspel;
unsigned empty_args_list(arg_list*);
unsigned char len_arg_list(arg_list*);
void cpy_expression(expression* dst, expression* src);
unsigned eq_expression(expression*, expression*);
void concat_fuspel(fuspel* start, fuspel* end);
fuspel* push_fuspel(fuspel*);
fuspel* pop_fuspel(fuspel*);
fuspel* popn_fuspel(fuspel*, unsigned char);
void free_expression(expression*);
void free_arg_list(arg_list*);
void free_rewrite_rule(rewrite_rule*);
void free_fuspel(fuspel*);
#endif
|
