Exemplo n.º 1
0
Arquivo: main.go Projeto: 8l/leaf
func mainBuild(args []string) {
	fset := flag.NewFlagSet("asm8-build", flag.ExitOnError)
	outFlag := fset.String("o", "out.e8", "output e8 image")
	fset.Parse(args)

	files := fset.Args()

	if len(files) != 1 {
		fmt.Fprintln(os.Stderr, "expect one single input file.")
		os.Exit(1)
	}

	onError := func(e error) {
		if e == nil {
			return
		}
		if e != nil {
			fmt.Fprintln(os.Stderr, e)
			os.Exit(1)
			panic("not reachable")
		}
	}

	onErrors := func(es []error) {
		if len(es) == 0 {
			return
		}
		for _, e := range es {
			fmt.Fprintln(os.Stderr, e)
		}
		os.Exit(1)
		panic("not reachable")
	}

	f := files[0]
	fin, e := os.Open(f)
	onError(e)

	parser := parser.New(fin, f)
	astree, errs := parser.Parse()
	onErrors(errs)

	onError(fin.Close())

	b := build.NewBuild()
	gen := codegen.NewGen(b, astree)
	errs = gen.Gen()
	onErrors(errs)

	fout, e := os.Create(*outFlag)
	onError(e)

	e = b.WriteImage(fout)
	onError(e)

	onError(fout.Close())
}
Exemplo n.º 2
0
Arquivo: main.go Projeto: 8l/leaf
func mainParse(args []string) {
	fset := flag.NewFlagSet("asm8-parse", flag.ExitOnError)
	astFlag := fset.Bool("ast", false, "print AST instead of token tree")
	fset.Parse(args)

	files := fset.Args()

	if len(files) != 1 {
		fmt.Fprintln(os.Stderr, "expects one single input file.")
		os.Exit(1)
	}

	onError := func(e error) { fmt.Fprintln(os.Stderr, e) }

	f := files[0]
	fin, e := os.Open(f)
	if e != nil {
		onError(e)
		os.Exit(1)
		return
	}

	parser := parser.New(fin, f)
	res, errs := parser.Parse()

	if *astFlag {
		if res != nil {
			p := prt.Stdout()
			p.Indent = "    "
			ast.Print(p, res)
		}
	} else {
		parser.PrintTree(os.Stdout)
	}

	for _, e := range errs {
		onError(e)
	}

	if len(errs) > 0 {
		os.Exit(1)
		return
	}
}