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cmd/viewer: add support for map-like container types

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This PR modifies viewTypeForContainerType to use the last type parameter of a container type
as the value type, enabling the implementation of map-like container types where the second-to-last
(usually first) type parameter serves as the key type.

It also adds a MapContainer type to test the code generation.

Updates #12736

Signed-off-by: Nick Khyl <nickk@tailscale.com>
This commit is contained in:
Nick Khyl
2024-08-14 15:06:50 -05:00
committed by Nick Khyl
parent 2f27319baf
commit f8f9f05ffe
4 changed files with 68 additions and 16 deletions
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14
cmd/viewer/tests/tests_clone.go
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@@ -426,14 +426,18 @@ func (src *StructWithContainers) Clone() *StructWithContainers {
dst := new(StructWithContainers)
*dst = *src
dst.CloneableContainer = *src.CloneableContainer.Clone()
dst.ClonableGenericContainer = *src.ClonableGenericContainer.Clone()
dst.CloneableGenericContainer = *src.CloneableGenericContainer.Clone()
dst.CloneableMap = *src.CloneableMap.Clone()
dst.CloneableGenericMap = *src.CloneableGenericMap.Clone()
return dst
}
// A compilation failure here means this code must be regenerated, with the command at the top of this file.
var _StructWithContainersCloneNeedsRegeneration = StructWithContainers(struct {
IntContainer Container[int]
CloneableContainer Container[*StructWithPtrs]
BasicGenericContainer Container[GenericBasicStruct[int]]
ClonableGenericContainer Container[*GenericNoPtrsStruct[int]]
IntContainer Container[int]
CloneableContainer Container[*StructWithPtrs]
BasicGenericContainer Container[GenericBasicStruct[int]]
CloneableGenericContainer Container[*GenericNoPtrsStruct[int]]
CloneableMap MapContainer[int, *StructWithPtrs]
CloneableGenericMap MapContainer[int, *GenericNoPtrsStruct[int]]
}{})