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%code requires{
#include "ast.hpp"
extern ast_Top *g_root; // A way of getting the AST out
//! This is to fix problems when generating C++
// We are declaring the functions provided by Flex, so
// that Bison generated code can call them.
int yylex(void);
void yyerror(const char *);
}
// Represents the value associated with any kind of
// AST node.
%union{
const ast_Base *stmnt;
// double number;
std::string *string;
}
%token T_TYPE_SPEC T_TYPE_QUAL T_STRG_SPEC T_IDENTIFIER T_SC T_CMA T_EQ T_INT_CONST
%type <stmnt> STMNT DCLRTN DCLRTN_SPEC DCLRTN_SPEC_T INIT_DCLRTR INIT_DCLRTR_LIST DCLRTR INITIALIZER STMNT_LIST // COMP_STMNT STMNT_LIST_STMNT SLCT_STMNT ITR_STMNT JMP_STMNT
// %type <number> // T_CONSTANT
%type <string> T_IDENTIFIER //T_OPERATOR
%start ROOT
%%
ROOT : STMNT_LIST { ; }
STMNT_LIST : STMNT { ; }
| STMNT_LIST STMNT { ; }
| DCLRTN { ; }
STMNT : DCLRTN { ; }
DCLRTN : DCLRTN_SPEC INIT_DCLRTR_LIST T_SC { $$ = $2; }
DCLRTN_SPEC : DCLRTN_SPEC_T { ; }
| DCLRTN_SPEC_T DCLRTN_SPEC { ; }
DCLRTN_SPEC_T : T_TYPE_SPEC { ; }
| T_TYPE_QUAL { ; }
| T_STRG_SPEC { ; }
INIT_DCLRTR_LIST : INIT_DCLRTR { g_root->push($1); }
| INIT_DCLRTR_LIST T_CMA INIT_DCLRTR { g_root->push($3); }
INIT_DCLRTR : DCLRTR { ; }
| DCLRTR T_EQ INITIALIZER { ; }
DCLRTR : T_IDENTIFIER {$$ = new ast_Declaration(*$1); }
INITIALIZER : T_INT_CONST { ; }
%%
ast_Top *g_root; // Definition of variable (to match declaration earlier)
ast_Top *parseAST() {
g_root = new ast_Top;
yyparse();
return g_root;
}
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