Beispiel #1
0
func TransFile(w io.Writer, fname, expr string) {
	f := token.NewFile(fname, expr, 1)
	n := parser.ParseFile(f, expr)

	if f.NumErrors() > 0 {
		f.PrintErrors()
		return
	}

	t := &translator{out: w, file: f, scope: n.Scope}
	t.topComment()
	/* includes will/might eventually reflect the imports from Calc. It's
	 * possible that stdio might be an auto-include if print remains a
	 * built-in function, which is likely won't */
	t.includes() /* temporary */
	t.transFuncSigs(n)
	t.transpile(n, false)

	if f.NumErrors() > 0 {
		f.PrintErrors()
	}

	if t.scope.Lookup("main") == nil {
		fmt.Println("No function \"main\" found!")
	}
	return
}
Beispiel #2
0
func TestScannerInit(t *testing.T) {
	var tests = []struct {
		expr string
		res  bool
	}{
		{"", true},
		{"(+ 1 2)", true},
	}
	for _, t := range tests {
		s := new(scanner.Scanner)
		f := token.NewFile("", t.expr)
		s.Init(f, t.expr)
	}
}
Beispiel #3
0
func EvalFile(fname, expr string) interface{} {
	f := token.NewFile(fname, expr, 1)
	n := parser.ParseFile(f, expr)
	if f.NumErrors() > 0 {
		f.PrintErrors()
		return nil
	}
	e := &evaluator{file: f, scope: n.Scope}
	res := e.eval(n)
	if f.NumErrors() > 0 {
		f.PrintErrors()
		return nil
	}
	return res
}
Beispiel #4
0
func ParseExpr(expr string) ast.Node {
	f := token.NewFile("", expr, 1)
	return ParseFile(f, expr)
}
Beispiel #5
0
func TestScannerScan(t *testing.T) {
	var tests = []struct {
		expr string
		toks []token.Token
		poss []token.Pos
		lits []string
	}{
		{"123", []token.Token{token.NUMBER}, []token.Pos{0}, []string{"123"}},
		{"-123", []token.Token{token.NUMBER}, []token.Pos{0}, []string{"-123"}},
		{"a", []token.Token{token.IDENT}, []token.Pos{0}, []string{"a"}},
		{
			"123 456",
			[]token.Token{token.NUMBER, token.NUMBER},
			[]token.Pos{0, 4}, []string{"123", "456"},
		},
		{
			"(+123 -456)",
			[]token.Token{token.LPAREN, token.ADD, token.NUMBER, token.NUMBER,
				token.RPAREN},
			[]token.Pos{0, 1, 2, 6, 10}, []string{"(", "+", "123", "-456", ")"},
		},
		{
			"(set A_Variable 123)",
			[]token.Token{token.LPAREN, token.SET, token.IDENT, token.NUMBER,
				token.RPAREN},
			[]token.Pos{0, 1, 5, 16, 19}, []string{"(", "set", "A_Variable", "123",
				")"},
		},
		{
			"; A comment",
			[]token.Token{token.COMMENT},
			[]token.Pos{0},
			[]string{"; A comment"},
		},
		{
			"234;comment",
			[]token.Token{token.NUMBER, token.COMMENT},
			[]token.Pos{0, 3},
			[]string{"234", ";comment"},
		},
		{
			";comment\n234",
			[]token.Token{token.COMMENT, token.NUMBER},
			[]token.Pos{0, 9},
			[]string{";comment", "234"},
		},
		{
			"\"a string\"",
			[]token.Token{token.STRING},
			[]token.Pos{0},
			[]string{"\"a string\""},
		},
		{
			"\"a string\"\"a string\"",
			[]token.Token{token.STRING, token.STRING},
			[]token.Pos{0, 10},
			[]string{"\"a string\"", "\"a string\""},
		},
	}
	for x, test := range tests {
		s := new(scanner.Scanner)
		f := token.NewFile("", test.expr)
		s.Init(f, test.expr)
		for i := 0; i < len(test.toks); i++ {
			tok, pos, lit := s.Scan()
			if tok != test.toks[i] || pos != test.poss[i] || lit != test.lits[i] {
				t.Log("Test:", x)
				t.Log("Expected:", test.toks[i], test.poss[i], test.lits[i])
				t.Fatal("Got:", tok, pos, lit)
			}
		}
	}
}