Ejemplo n.º 1
0
func main() {
	if len(os.Args) < 3 {
		fmt.Printf("usage: ./main grammar_file program_file\n")
		os.Exit(1)
	}

	gmr, err := ioutil.ReadFile(os.Args[1])
	if err != nil {
		fmt.Printf("'%s' is not a valid file name\n", os.Args[1])
	}

	pgm, err := ioutil.ReadFile(os.Args[2])
	if err != nil {
		fmt.Printf("'%s' is not a valid file name\n", os.Args[1])
	}

	// First file should be the grammar, second is the file being parsed
	gmrReader := bytes.NewReader(gmr)
	pgmReader := bytes.NewReader(pgm)

	// Get the grammar from the analyzer
	a := compiler.Analyzer{Reader: *gmrReader}
	grammar := a.ReadGrammar()

	// Create a generator, necessary for table
	g := compiler.Generator{Grammar: grammar}

	// Setup the parser
	p := compiler.Parser{Grammar: a.ReadGrammar(), Reader: *pgmReader}
	p.Scanner = compiler.Scanner{Reader: *pgmReader}
	p.Table = g.GetTable()

	p.Driver()
}
Ejemplo n.º 2
0
func main() {
	// create a new reader and initialze a parser with it
	buf, _ := ioutil.ReadFile(os.Args[1])
	reader := bytes.NewReader(buf)

	p := new(compiler.Parser)
	p.Scanner = compiler.Scanner{Reader: *reader}
	p.SystemGoal()
}
Ejemplo n.º 3
0
func main() {
	// the file for reading
	src, _ := ioutil.ReadFile(os.Args[1])
	reader := bytes.NewReader(src)

	// the file for writing
	dst, _ := os.Create(os.Args[2])
	writer := bufio.NewWriter(dst)
	defer dst.Close()

	// setup the parser
	p := compiler.Parser{Writer: *writer}
	p.Scanner = compiler.Scanner{Reader: *reader}

	// parse the file!
	p.SystemGoal()
}