%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_KEYWORD T_IDENTIFIER T_SC //T_CONSTANT T_OPERATOR T_LCBRACKET T_RCBRACKET
			
%type <stmnt> STMNT DCLRTN STMNT_LIST  // COMP_STMNT STMNT_LIST_STMNT SLCT_STMNT ITR_STMNT JMP_STMNT
//			%type <number> //	T_CONSTANT
%type <string> T_KEYWORD T_IDENTIFIER //T_OPERATOR
			
%start ROOT
			
%%

ROOT : STMNT_LIST { ; }

STMNT_LIST : STMNT { g_root->push_back($1); }
	   | STMNT_LIST STMNT { g_root->push_back($2); }

STMNT : DCLRTN { $$ = $1; }

DCLRTN : T_KEYWORD T_IDENTIFIER T_SC { $$ = new ast_Declaration(*$2); }

%%

ast_Top *g_root; // Definition of variable (to match declaration earlier)

ast_Top *parseAST() {
    g_root = new ast_Top;
    yyparse();
    return g_root;
}