address_space 从哪里来

1. address_space
2. -------------------------------------
3. ->ident-list.h
4. IDENT(address_space);
5. -->
6. #define IDENT(n) __IDENT(n## _ident, #n, 0)
7. =====================================

1. address_space
2. -------------------------------------
3. ->parse.c
4. static struct init_keyword {
5. const char *name;
6. enum namespace ns;
7. unsigned long modifiers;
8. struct symbol_op *op;
9. struct symbol *type;
10. } keyword_table[] = {
11. /* .... */
12. { "address_space",NS_KEYWORD, .op = &address_space_op },
13. /* ... */
14. };
15. 这是关键字，有什么操作呢?关注symbol_op结构的address_space_op：
16. =====================================
17. address_space_op
18. -------------------------------------
19. -->parse.c
20. static struct symbol_op address_space_op = {
21. .attribute = attribute_address_space,
22. };
23. =====================================
24. attribute_address_space
25. -------------------------------------
26. --->parse.c
27. static attr_t attribute_address_space ;
28. struct symbol_op
29. -------------------------------------
30. --->symbol.h
31. struct symbol_op {
32. /* ..... */
33. /* keywords */
34. struct token *(*attribute)(struct token *token,
35. struct symbol *attr, struct decl_state *ctx);
36. /* ..... */
37. };
38. =====================================
39. attr_t
40. -------------------------------------
41. ---->parse.c
42. typedef struct token *attr_t(struct token *,
43. struct symbol *, struct decl_state *);
44. attribute_address_space
45. -------------------------------------
46. ---->parse.c
47. static struct token *
48. attribute_address_space(struct token *token,
49. struct symbol *attr, struct decl_state *ctx)
50. {
51. struct expression *expr = NULL;
52. int as;
53. token = expect(token, '(', "after address_space attribute");
54. token = conditional_expression(token, &expr);
55. if (expr) {
56. as = const_expression_value(expr);
57. if (Waddress_space && as)
58. ctx->ctype.as = as;
59. }
60. token = expect(token, ')', "after address_space attribute");
61. return token;
62. }
63. =====================================