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tpl: Treat booleans as set in default function

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Booleans and `default` don't really make sense together, so we'll always treat
booleans as "set" and return the given value.
This commit is contained in:
Cameron Moore 2016-03-16 12:45:50 -05:00 committed by Bjørn Erik Pedersen
parent b5c718a4de
commit b0326a1c0f
3 changed files with 8 additions and 7 deletions
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6
docs/content/templates/functions.md
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@ -30,9 +30,9 @@ and other basic tools; these are listed in the
### default ### default
Checks whether a given value is set and returns a default value if it is not. Checks whether a given value is set and returns a default value if it is not.
"Set" in this context means true for booleans; non-zero for numeric types and "Set" in this context means non-zero for numeric types and times;
times; non-zero length for strings, arrays, slices, and maps; any struct value; non-zero length for strings, arrays, slices, and maps;
or non-nil for any other types. any boolean or struct value; or non-nil for any other types.
e.g. e.g.

8
tpl/template_funcs.go
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@ -1318,9 +1318,9 @@ func dateFormat(layout string, v interface{}) (string, error) {
} }
// dfault checks whether a given value is set and returns a default value if it // dfault checks whether a given value is set and returns a default value if it
// is not. "Set" in this context means true for booleans; non-zero for numeric // is not. "Set" in this context means non-zero for numeric types and times;
// types and times; non-zero length for strings, arrays, slices, and maps; any // non-zero length for strings, arrays, slices, and maps;
// struct value; or non-nil for any other types. // any boolean or struct value; or non-nil for any other types.
func dfault(dflt interface{}, given ...interface{}) (interface{}, error) { func dfault(dflt interface{}, given ...interface{}) (interface{}, error) {
// given is variadic because the following construct will not pass a piped // given is variadic because the following construct will not pass a piped
// argument when the key is missing: {{ index . "key" | default "foo" }} // argument when the key is missing: {{ index . "key" | default "foo" }}
@ -1342,7 +1342,7 @@ func dfault(dflt interface{}, given ...interface{}) (interface{}, error) {
switch g.Kind() { switch g.Kind() {
case reflect.Bool: case reflect.Bool:
set = g.Bool() set = true
case reflect.String, reflect.Array, reflect.Slice, reflect.Map: case reflect.String, reflect.Array, reflect.Slice, reflect.Map:
set = g.Len() != 0 set = g.Len() != 0
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64: case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:

1
tpl/template_funcs_test.go
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@ -1886,6 +1886,7 @@ func TestDefaultFunc(t *testing.T) {
given interface{} given interface{}
expected interface{} expected interface{}
}{ }{
{true, false, false},
{"5", 0, "5"}, {"5", 0, "5"},
{"test1", "set", "set"}, {"test1", "set", "set"},