Пример #1
0
func ParseEval(env Env, input string, readLine func() string, sourceName string) (ast.Node, error) {
	defer func() {
		// Some non-application triggered panic has occurred
		if e := recover(); e != nil {
			fmt.Printf("Host environment error: %v\n", e)
			panic(e)
		}
	}()

	nodes, parseErrors := parser.Parse(input, sourceName)

	if parseErrors != nil {
		fmt.Println(parseErrors.String())
	}

	var result ast.Node
	var evalError error
	for _, n := range nodes {
		result, evalError = Eval(env, n, os.Stdout, readLine)
		if evalError != nil {
			break
		}
	}

	if evalError == nil {
		return result, nil
	} else {
		return nil, evalError
	}
}
Пример #2
0
func testInputFile(sourceFilePath string, t *testing.T) {
	sourceDirPart, sourceFileNamePart := filepath.Split(sourceFilePath)
	parts := strings.Split(sourceFileNamePart, ".")
	testName := parts[0]

	outputFilePath := sourceDirPart + testName + ".out"

	input, errIn := util.ReadFile(sourceFilePath)
	if errIn != nil {
		t.Errorf("Error reading file <" + sourceFilePath + ">: " + errIn.Error())
		return
	}

	expectedRaw, errOut := util.ReadFile(outputFilePath)
	if errOut != nil {
		t.Errorf("Error reading file <" + outputFilePath + ">: " + errOut.Error())
		return
	}

	// Remove any carriage return line endings from .out file
	expectedWithUntrimmed := strings.Replace(expectedRaw, "\r", "", -1)
	expected := strings.TrimSpace(expectedWithUntrimmed)

	nodes, errors := parser.Parse(input, sourceFilePath)
	if errors.Len() != 0 {
		verify(t, sourceFilePath, input, expected, errors.String())
	} else {
		e := interpreter.NewTopLevelMapEnv()

		var outputBuffer bytes.Buffer

		dummyReadLine := func() string {
			return "text from dummy read line"
		}

		var result ast.Node
		var evalError error
		for _, n := range nodes {
			result, evalError = interpreter.Eval(e, n, &outputBuffer, dummyReadLine)
			if evalError != nil {
				break
			}
		}

		actual := (&outputBuffer).String()

		if evalError == nil {
			//DEBUG fmt.Printf("RESULT(%v): %v\n", sourceFilePath, result)
			if result != nil {
				actual = actual + result.String()
			}
		} else {
			actual = actual + evalError.Error()
		}
		verify(t, sourceFilePath, input, expected, actual)
	}
}
Пример #3
0
func primReadString(e Env, head ast.Node, args []ast.Node) ast.Node {
	arg := args[0]
	switch val := arg.(type) {
	case *ast.Str:
		nodes, parseErrors := parser.Parse(val.Value, "string")

		if parseErrors != nil {
			panicEvalError(arg, fmt.Sprintf("Unable to read string %v: %v", val, parseErrors))
			return nil
		}

		if len(nodes) == 0 {
			return &ast.Nil{}
		}

		return nodes[0]
	}

	panicEvalError(arg, "Argument to 'read-string' not a string: "+arg.String())
	return nil
}