parse.h

   1 #ifndef PARSE_H
   2 #define PARSE_H
   3 /*
   4  * Basic parsing data structures. Statements and symbols.
   5  *
   6  * Copyright (C) 2003 Linus Torvalds, all rights reserved.
   7  */
   8
   9 #include "symbol.h"
  10
  11 enum expression_type {
  12         EXPR_CONSTANT,
  13         EXPR_SYMBOL,
  14         EXPR_BINOP,
  15         EXPR_DEREF,
  16         EXPR_PREOP,
  17         EXPR_POSTOP,
  18         EXPR_CAST,
  19         EXPR_SIZEOF,
  20         EXPR_CONDITIONAL,
  21         EXPR_STATEMENT,
  22 };
  23
  24 struct expression {
  25         int type, op;
  26         struct token *token;
  27         union {
  28                 struct expression *unop;
  29                 struct statement *statement;
  30                 struct symbol *symbol;
  31                 struct binop_arg {
  32                         struct expression *left, *right;
  33                 };
  34                 struct deref_arg {
  35                         struct expression *deref;
  36                         struct token *member;
  37                 };
  38                 struct cast_arg {
  39                         struct symbol *cast_type;
  40                         struct expression *cast_expression;
  41                 };
  42                 struct conditional_expr {
  43                         struct expression *conditional, *cond_true, *cond_false;
  44                 };
  45                 struct statement_struct {
  46                         struct symbol_list *syms;
  47                         struct statement_list *stmts;
  48                 };
  49         };
  50 };
  51
  52 enum statement_type {
  53         STMT_NONE,
  54         STMT_EXPRESSION,
  55         STMT_COMPOUND,
  56         STMT_IF,
  57         STMT_RETURN,
  58         STMT_BREAK,
  59         STMT_CONTINUE,
  60         STMT_CASE,
  61         STMT_SWITCH,
  62         STMT_FOR,
  63         STMT_WHILE,
  64         STMT_DO,
  65         STMT_LABEL,
  66         STMT_GOTO,
  67         STMT_ASM,
  68 };
  69
  70 struct statement {
  71         int type;
  72         struct token *token;
  73         struct statement *next;
  74         union {
  75                 struct label_arg {
  76                         struct token *label;
  77                         struct statement *label_statement;
  78                 };
  79                 struct expression *expression;
  80                 struct if_statement {
  81                         struct expression *if_conditional;
  82                         struct statement *if_true;
  83                         struct statement *if_false;
  84                 };
  85                 struct compound_struct {
  86                         struct symbol_list *syms;
  87                         struct statement_list *stmts;
  88                 };
  89                 struct labeled_struct {
  90                         struct token *label_identifier;
  91                         struct statement *label_statement;
  92                 };
  93                 struct case_struct {
  94                         struct expression *case_expression;
  95                         struct expression *case_to;
  96                         struct statement *case_statement;
  97                 };
  98                 struct switch_struct {
  99                         struct expression *switch_expression;
 100                         struct statement *switch_statement;
 101                 };
 102                 struct iteration_struct {
 103                         struct expression *e1, *e2, *e3;
 104                         struct statement *iterate;
 105                 };
 106                 struct goto_struct {
 107                         struct token *goto_label;
 108                         struct expression *goto_expression;
 109                 };
 110         };
 111 };
 112
 113 extern struct token *parse_expression(struct token *, struct expression **);
 114 extern struct token *statement_list(struct token *, struct statement_list **);
 115
 116 extern void show_statement(struct statement *);
 117 extern void show_statement_list(struct statement_list *, const char *);
 118 extern void show_expression(struct expression *);
 119 extern void translation_unit(struct token *, struct symbol_list **);
 120
 121 #endif /* PARSE_H */