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common/collections: Fix type checking in Append
The fix introduced in Hugo `0.49.1` had an unintended side-effect in the `Append` func used in both `append` and `.Scratch.Add`. This commit fixes that by loosen/fixing the type checking so concrete types can be appended to interface slices. Fixes #5303
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parent
3583dd6d71
commit
535755e4f8
2 changed files with 7 additions and 1 deletions
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@ -59,7 +59,7 @@ func Append(to interface{}, from ...interface{}) (interface{}, error) {
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for _, f := range from {
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fv := reflect.ValueOf(f)
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if tot != fv.Type() {
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if !fv.Type().AssignableTo(tot) {
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return nil, fmt.Errorf("append element type mismatch: expected %v, got %v", tot, fv.Type())
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}
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tov = reflect.Append(tov, fv)
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@ -43,7 +43,13 @@ func TestAppend(t *testing.T) {
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tstSlicers{&tstSlicer{"a"},
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&tstSlicer{"b"},
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&tstSlicer{"c"}}},
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{testSlicerInterfaces{&tstSlicerIn1{"a"}, &tstSlicerIn1{"b"}},
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[]interface{}{&tstSlicerIn1{"c"}},
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testSlicerInterfaces{&tstSlicerIn1{"a"}, &tstSlicerIn1{"b"}, &tstSlicerIn1{"c"}}},
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// Errors
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{testSlicerInterfaces{&tstSlicerIn1{"a"}, &tstSlicerIn1{"b"}},
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[]interface{}{"c"},
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false},
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{"", []interface{}{[]string{"a", "b"}}, false},
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// No string concatenation.
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{"ab",
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