blob: 3bcc637100bee08c369f70700148885f4889f3c1 (
plain)
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
|
#include "ast.h"
#include <stdlib.h>
static void expr_destroy(struct expr_node* node);
static void stmt_destroy(struct stmt_node* node);
static void type_destroy(struct type_node* node) {
free(node->type);
}
static void var_decl_destroy(struct var_decl_node* node) {
type_destroy(&node->type);
free(node->ident);
}
static void group_destroy(struct group_node* node) {
struct stmt_node* body_node = node->body_head;
while (body_node != NULL) {
struct stmt_node* next = body_node->next;
stmt_destroy(body_node);
free(body_node);
body_node = next;
}
}
static void fn_decl_destroy(struct fn_decl_node* node) {
type_destroy(&node->return_type);
free(node->name);
struct var_decl_node* args_node = node->args_head;
while (args_node != NULL) {
struct var_decl_node* next = args_node->next;
var_decl_destroy(args_node);
free(args_node);
args_node = next;
}
group_destroy(&node->body);
}
static void return_destroy(struct return_node* node) {
if (node->ret_val != NULL) {
expr_destroy(node->ret_val);
free(node->ret_val);
}
}
static void expr_destroy(struct expr_node* node) {
switch (node->type) {
case EXPR_EMPTY:
case EXPR_INT_LIT:
break;
case EXPR_VAR_DECL:
var_decl_destroy(&node->as._var_decl);
break;
case EXPR_RETURN:
return_destroy(&node->as._return);
break;
}
}
static void stmt_destroy(struct stmt_node* node) {
switch (node->type) {
case STMT_EXPR:
expr_destroy(&node->as._expr);
break;
case STMT_GROUP:
group_destroy(&node->as._group);
}
}
static void root_node_destroy(struct root_node* node) {
switch (node->type) {
case ROOT_FN_DECL:
fn_decl_destroy(&node->as._fn_decl);
break;
}
}
void ast_destroy(struct root_node* head) {
struct root_node* node = head;
while (node != NULL) {
struct root_node* next = node->next;
root_node_destroy(node);
free(node);
node = next;
}
}
|
