git » unicorn-sparkle-basic.git » line-edit-recall » tree

[line-edit-recall] / parse.h 

 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
#include "usbasic.tab.h"
#include <readline/history.h>
#include <readline/readline.h>
#include <stdio.h>
#include <stdlib.h>

enum NODE_TYPE {
  NODE_NUMBERED_LINE,
  NODE_PRINT,
  NODE_IF,
  NODE_ADD,
  NODE_SUBTRACT,
  NODE_MULTIPLY,
  NODE_DIVIDE,
  NODE_LT,
  NODE_LTE,
  NODE_GT,
  NODE_GTE,
  NODE_EQ,
  NODE_NUMBER_INTEGER,
  NODE_STRING,
  NODE_ID
};

struct node_line_data {
  int linum;
  struct node_tag *stmt;
};

struct node_string_data {
  char *str;
};

struct node_print_data {
  struct node_tag *expr;
};

struct node_iff_data {
  struct node_tag *pred;
  struct node_tag *stmt;
};

struct node_id_data {
  char *name;
};

struct node_number_integer_data {
  int val;
};

struct node_tag {
  enum NODE_TYPE type;
  union {
    struct node_line_data line;
    struct node_string_data string;
    struct node_print_data print;
    struct node_iff_data iff;
    struct node_id_data id;
    struct node_number_integer_data number_integer;
  } data;
};

struct node_tag *ast_make_string(char *s);
struct node_tag *ast_make_numbered_line(int linum, struct node_tag *stmt);
struct node_tag *ast_make_print(struct node_tag *expr);
struct node_tag *ast_make_if(struct node_tag *pred, struct node_tag *stmt);
struct node_tag *ast_make_id(char *name);
struct node_tag *ast_make_number_integer(int val);

extern int yyparse();
extern void yy_scan_string(char *);
extern void yylex_destroy();

struct node_tag *read_line(char *line);
struct node_tag *read_line_stdin();