parse.h

   1 #ifndef PARSE_H
   2 #define PARSE_H
   3
   4 #include "symbol.h"
   5
   6 enum expression_type {
   7         EXPR_PRIMARY,
   8         EXPR_BINOP,
   9         EXPR_DEREF,
  10         EXPR_PREOP,
  11         EXPR_POSTOP,
  12         EXPR_CAST,
  13         EXPR_SIZEOF,
  14         EXPR_CONDITIONAL,
  15         EXPR_STATEMENT,
  16 };
  17
  18 struct expression {
  19         int type, op;
  20         struct token *token;
  21         union {
  22                 struct expression *unop;
  23                 struct statement *statement;
  24                 struct binop_arg {
  25                         struct expression *left, *right;
  26                 };
  27                 struct deref_arg {
  28                         struct expression *deref;
  29                         struct token *member;
  30                 };
  31                 struct cast_arg {
  32                         struct symbol *cast_type;
  33                         struct expression *cast_expression;
  34                 };
  35                 struct conditional_expr {
  36                         struct expression *conditional, *cond_true, *cond_false;
  37                 };
  38                 struct statement_struct {
  39                         struct symbol_list *syms;
  40                         struct statement_list *stmts;
  41                 };
  42         };
  43 };
  44
  45 enum statement_type {
  46         STMT_NONE,
  47         STMT_EXPRESSION,
  48         STMT_COMPOUND,
  49         STMT_IF,
  50         STMT_RETURN,
  51         STMT_BREAK,
  52         STMT_CONTINUE,
  53         STMT_CASE,
  54         STMT_SWITCH,
  55         STMT_FOR,
  56         STMT_WHILE,
  57         STMT_DO,
  58         STMT_LABEL,
  59         STMT_GOTO,
  60         STMT_ASM,
  61 };
  62
  63 struct statement {
  64         int type;
  65         struct token *token;
  66         struct statement *next;
  67         union {
  68                 struct label_arg {
  69                         struct token *label;
  70                         struct statement *label_statement;
  71                 };
  72                 struct expression *expression;
  73                 struct if_statement {
  74                         struct expression *if_conditional;
  75                         struct statement *if_true;
  76                         struct statement *if_false;
  77                 };
  78                 struct compound_struct {
  79                         struct symbol_list *syms;
  80                         struct statement_list *stmts;
  81                 };
  82                 struct labeled_struct {
  83                         struct token *label_identifier;
  84                         struct statement *label_statement;
  85                 };
  86                 struct case_struct {
  87                         struct expression *case_expression;
  88                         struct expression *case_to;
  89                         struct statement *case_statement;
  90                 };
  91                 struct switch_struct {
  92                         struct expression *switch_expression;
  93                         struct statement *switch_statement;
  94                 };
  95                 struct iteration_struct {
  96                         struct expression *e1, *e2, *e3;
  97                         struct statement *iterate;
  98                 };
  99                 struct goto_struct {
 100                         struct token *goto_label;
 101                         struct expression *goto_expression;
 102                 };
 103         };
 104 };
 105
 106 extern struct token *parse_expression(struct token *, struct expression **);
 107 extern struct token *statement_list(struct token *, struct statement_list **);
 108
 109 extern void show_statement(struct statement *);
 110 extern void show_statement_list(struct statement_list *);
 111 extern void show_expression(struct expression *);
 112 extern void translation_unit(struct token *, struct symbol_list **);
 113
 114 #endif /* PARSE_H */