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Use cast.ToIntE for int conversions in substr and slicestr

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It is less restrictive, and it is what is used in other template funcs.
This commit is contained in:
Bjørn Erik Pedersen 2015-08-15 15:47:16 +02:00
parent 5b51b3b9fb
commit dac9c0dae6
2 changed files with 13 additions and 31 deletions
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38
tpl/template_funcs.go
View file

@ -128,24 +128,6 @@ func compareGetFloat(a interface{}, b interface{}) (float64, float64) {
return left, right
}
// Taken out from Substr, to be used by Slicestr too.
func toInt(v interface{}, message string) (int, error) {
switch i := v.(type) {
case int:
return i, nil
case int8:
return int(i), nil
case int16:
return int(i), nil
case int32:
return int(i), nil
case int64:
return int(i), nil
default:
return 0, errors.New(message)
}
}
// Slicing in Slicestr is done by specifying a half-open range with
// two indices, start and end. 1 and 4 creates a slice including elements 1 through 3.
// The end index can be omitted, it defaults to the string's length.
@ -160,13 +142,13 @@ func Slicestr(a interface{}, startEnd ...interface{}) (string, error) {
argNum := len(startEnd)
if argNum > 0 {
if argStart, err = toInt(startEnd[0], "start argument must be integer"); err != nil {
return "", err
if argStart, err = cast.ToIntE(startEnd[0]); err != nil {
return "", errors.New("start argument must be integer")
}
}
if argNum > 1 {
if argEnd, err = toInt(startEnd[1], "end argument must be integer"); err != nil {
return "", err
if argEnd, err = cast.ToIntE(startEnd[1]); err != nil {
return "", errors.New("end argument must be integer")
}
}
@ -219,16 +201,16 @@ func Substr(a interface{}, nums ...interface{}) (string, error) {
case 0:
return "", errors.New("too less arguments")
case 1:
if start, err = toInt(nums[0], "start argument must be integer"); err != nil {
return "", err
if start, err = cast.ToIntE(nums[0]); err != nil {
return "", errors.New("start argument must be integer")
}
length = len(asRunes)
case 2:
if start, err = toInt(nums[0], "start argument must be integer"); err != nil {
return "", err
if start, err = cast.ToIntE(nums[0]); err != nil {
return "", errors.New("start argument must be integer")
}
if length, err = toInt(nums[1], "length argument must be integer"); err != nil {
return "", err
if length, err = cast.ToIntE(nums[1]); err != nil {
return "", errors.New("length argument must be integer")
}
default:
return "", errors.New("too many arguments")

6
tpl/template_funcs_test.go
View file

@ -437,9 +437,9 @@ func TestSubstr(t *testing.T) {
{123, 1, 3, "23"},
{1.2e3, 0, 4, "1200"},
{tstNoStringer{}, 0, 1, false},
{"abcdef", 2.0, nil, false},
{"abcdef", 2.0, 2, false},
{"abcdef", 2, 2.0, false},
{"abcdef", 2.0, nil, "cdef"},
{"abcdef", 2.0, 2, "cd"},
{"abcdef", 2, 2.0, "cd"},
{"ĀĀĀ", 1, 2, "ĀĀ"}, // # issue 1333
} {
var result string