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text/template: evaluate function fields

Just an oversight they didn't work and easy to address.

Fixes #3025.

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/5656059
This commit is contained in:
Rob Pike 2012-02-15 16:05:34 +11:00
parent 9a44560033
commit aca8071fd5
2 changed files with 15 additions and 3 deletions

View File

@ -419,10 +419,14 @@ func (s *state) evalField(dot reflect.Value, fieldName string, args []parse.Node
tField, ok := receiver.Type().FieldByName(fieldName)
if ok {
field := receiver.FieldByIndex(tField.Index)
if hasArgs {
s.errorf("%s is not a method but has arguments", fieldName)
}
if tField.PkgPath == "" { // field is exported
// If it's a function, we must call it.
if field.Type().Kind() == reflect.Func {
return s.evalCall(dot, field, fieldName, args, final)
}
if hasArgs {
s.errorf("%s is not a method or function but has arguments", fieldName)
}
return field
}
}

View File

@ -59,6 +59,8 @@ type T struct {
PI *int
PSI *[]int
NIL *int
// Function (not method)
Func func(...string) string
// Template to test evaluation of templates.
Tmpl *Template
}
@ -118,6 +120,7 @@ var tVal = &T{
Err: errors.New("erroozle"),
PI: newInt(23),
PSI: newIntSlice(21, 22, 23),
Func: func(s ...string) string { return fmt.Sprint("<", strings.Join(s, "+"), ">") },
Tmpl: Must(New("x").Parse("test template")), // "x" is the value of .X
}
@ -297,8 +300,13 @@ var execTests = []execTest{
"{{with $x := .}}{{with .SI}}{{$.GetU.TrueFalse $.True}}{{end}}{{end}}",
"true", tVal, true},
// Function call
{".Func", "-{{.Func}}-", "-<>-", tVal, true},
{".Func2", "-{{.Func `he` `llo`}}-", "-<he+llo>-", tVal, true},
// Pipelines.
{"pipeline", "-{{.Method0 | .Method2 .U16}}-", "-Method2: 16 M0-", tVal, true},
{"pipeline func", "-{{.Func `llo` | .Func `he` }}-", "-<he+<llo>>-", tVal, true},
// If.
{"if true", "{{if true}}TRUE{{end}}", "TRUE", tVal, true},