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Generating a C++ reentrant parser.

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This commit is contained in:
Stefano Sanfilippo 2014-11-28 19:00:51 +01:00
parent e2a635e95f
commit 649797f13a
1 changed files with 38 additions and 11 deletions
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47
Monicelli.ypp
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@ -1,21 +1,37 @@
%{
#define YYERROR_VERBOSE
extern void yyerror(const char *);
extern int yylex();
#include "Nodes.hpp"
using namespace monicelli;
extern Program *program;
%}
%skeleton "lalr1.cc"
%require "3.0"
%language "c++"
%defines
%output "Parser.cpp"
%locations
%token-table
%define parse.error verbose
%define api.namespace {monicelli}
%define parser_class_name {Parser}
%lex-param {Scanner &scanner}
%parse-param {Scanner &scanner}
%parse-param {Program &program}
%code requires {
#include "Nodes.hpp"
namespace monicelli {
class Scanner;
}
}
%define api.prefix {mc}
%code {
static int yylex(Parser::semantic_type*, Parser::location_type*, Scanner&);
}
%token MAIN
%token RETURN
@ -107,13 +123,13 @@ static std::stack<BranchCaseList*> branchCaseStack;
program:
/* epsilon */
| fun_decls main fun_decls {
program->setMain($2);
program.setMain($2);
}
;
fun_decls:
/* epsilon */
| fun_decl {
program->addFunction($1);
program.addFunction($1);
}
fun_decls
;
@ -362,3 +378,14 @@ simple_expression:
;
%%
#include "Scanner.hpp"
void Parser::error(const location_type& loc, const std::string &message) {
std::cerr << "Error at " << loc.begin.line << ":" << loc.begin.column;
std::cerr << ": " << message << std::endl;
}
static int yylex(Parser::semantic_type *lval, Parser::location_type *loc, Scanner &scanner) {
return scanner.yylex(lval);
}