int main( int argc, char **argv ){
//Will hold return value of compiler components.
int ret;
//initialize directives ds.
d.l = d.a = d.v = 0;
//Parse directives.
parseDirectives( argc, argv );
/*
* Run scanner, parser, code generator, and VM components.
* For each:
* If the component didn't finish successfully, delete associated files based on
* directives, and exit.
*/
//Scanner.
ret = system( "./LexicalAnalyzer" );
if( ret < 0 || WEXITSTATUS(ret) != EXIT_SUCCESS ){
if( d.l == 0 ){
remove( "source_program.txt" );
remove( "lexeme_table.txt" );
remove( "lexeme_list.txt" );
}
exit(EXIT_FAILURE);
}
//Parser / Code Generator.
ret = system( "./Parser-Code_Generator" );
if( ret < 0 || WEXITSTATUS(ret) != EXIT_SUCCESS ){
if( d.a == 0 ){
remove( "assembly.txt" );
}
exit(EXIT_FAILURE);
}
//VM.
ret = system( "./pmachine" );
if( ret < 0 || WEXITSTATUS(ret) != EXIT_SUCCESS ){
if( d.v == 0 ){
remove( "output1.txt" );
remove( "output2.txt" );
remove( "output3.txt" );
}
exit(EXIT_FAILURE);
}
//Handle directives.
if( d.l == 0 ){
remove( "source_program.txt" );
remove( "lexeme_table.txt" );
remove( "lexeme_list.txt" );
}
if( d.a == 0 )
remove( "assembly.txt" );
if( d.v == 0 ){
remove( "output1.txt" );
remove( "output2.txt" );
}
//Exit successfully!
exit( EXIT_SUCCESS );
return 0;
}
std::shared_ptr<PrototypeAST> Parser::parsePrototype() {
lexer->getNextToken(); //Eat tokenn `def`
if (lexer->currentToken != tok_id) {
puts ("Expected identifier");
return nullptr;
}
std::string name = lexer->identifier;
lexer->getNextToken();
puts (name.c_str());
if (lexer->currentToken != '(') {
puts ("Expected '('");
return nullptr;
}
// Arguments
auto args = parseArgs();
if (!args)
return nullptr;
if (lexer->currentToken != ')') {
puts ("Expected ')'");
return nullptr;
}
// Type
lexer->getNextToken();
auto type = compiler->findType ("void");
if (lexer->currentToken == tok_ra) {
lexer->getNextToken();
type = parseType();
if (!type) {
puts ("cant find type");
puts (lexer->identifier.c_str());
return nullptr;
}
lexer->getNextToken();
}
// Directives
std::unique_ptr<DirectivesAST> directives = nullptr;
if (lexer->currentToken == tok_dd)
directives = parseDirectives();
return std::make_shared<PrototypeAST> (name, std::move(args), std::move(directives), type);
}
