func TestEvalTimes(t *testing.T) {
src := "$res=3*9"
//fmt.Printf("src: %s\n", src)
ret := getTestEvalResult(src, t)
if ret == nil {
return
}
res := ret[0]
check := ast.NewLeftID("res", ast.NewInt(27))
if !res.Equals(check) {
t.Error(fmt.Errorf("%s => %d", src, res.Value.(int)))
return
}
//fmt.Printf("res: %v\n", res)
}
func (this *Eval) evalOperator(op1 *ast.Stmt, op2 *ast.Stmt, opstr string) (*ast.Stmt, error) {
if op1.Type == ast.Int && op2.Type == ast.Int {
var res int
a := op1.Prop["value"].(int)
b := op2.Prop["value"].(int)
switch opstr {
case "+":
res = a + b
case "-":
res = a - b
case "*":
res = a * b
case "/":
res = a / b
default:
return nil, fmt.Errorf("invalid operator between Integers: %s", opstr)
}
return ast.NewInt(res), nil
}
if (op1.Type == ast.Float || op2.Type == ast.Int) && (op1.Type == ast.Int || op2.Type == ast.Float) {
var res float64
var a float64
var b float64
var err error
a, err = strconv.ParseFloat(op1.Value.(string), 64)
if err != nil {
return nil, fmt.Errorf("invalid float: %s", op1.Value)
}
b, err = strconv.ParseFloat(op2.Value.(string), 64)
if err != nil {
return nil, fmt.Errorf("invalid float: %s", op2.Value)
}
switch opstr {
case "+":
res = a + b
case "-":
res = a - b
case "*":
res = a * b
case "/":
res = a / b
default:
return nil, fmt.Errorf("invalid operator between Integers: %s", opstr)
}
return ast.NewFloat(res), nil
}
if op1.Type == ast.LeftID {
if opstr != "=" {
return nil, fmt.Errorf("invalid operator for LeftID: %s", opstr)
}
return ast.NewLeftID(op1.Value.(string), op2), nil
}
if op1.Type == ast.Date && op2.Type == ast.Duration {
var ret stdtime.Time
old := op1.Prop["time"].(stdtime.Time)
duration := op2.Prop["time"].(stdtime.Duration)
switch opstr {
case "+":
ret = old.Add(duration)
case "-":
ret = old.Add(-1 * duration)
default:
return nil, fmt.Errorf("invalid operator between Date and Duration: %s", opstr)
}
return ast.NewDate(ret, op1.Prop["format"].(string)), nil
}
if op1.Type == ast.Date && op2.Type == ast.DurationExt {
var ret stdtime.Time
old := op1.Prop["time"].(stdtime.Time)
year := op2.Prop["year"].(int)
month := op2.Prop["month"].(int)
day := op2.Prop["day"].(int)
switch opstr {
case "+":
ret = old.AddDate(year, month, day)
case "-":
ret = old.AddDate(-1*year, -1*month, -1*day)
default:
return nil, fmt.Errorf("invalid operator between Date and Duration: %s", opstr)
}
return ast.NewDate(ret, op1.Prop["format"].(string)), nil
}
if op1.Type == ast.Int && op2.Type == ast.Duration {
if opstr != "*" {
return nil, fmt.Errorf("invalid operator between Int and Duration: %s", opstr)
}
n := op1.Prop["value"].(int)
return ast.NewDuration(stdtime.Duration(n) * op2.Prop["time"].(stdtime.Duration)), nil
}
if op1.Type == ast.Int && op2.Type == ast.DurationExt {
if opstr != "*" {
return nil, fmt.Errorf("invalid operator between Int and Duration: %s", opstr)
}
n := op1.Prop["value"].(int)
return ast.NewDurationExt(
n*op2.Prop["year"].(int),
n*op2.Prop["month"].(int),
n*op2.Prop["day"].(int)), nil
}
return nil, fmt.Errorf("invalid operation pair type: %s and %s",
op1.Type, op2.Type)
}