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Use generics for providers API

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Using generics for the providers API allows a type to be associated
with a ProviderKey, resulting in a type-safe API without that doesn't
require runtime type assertions by every caller.

Unfortunately, Go does not allow generic types in methods, only in
functions [1].  This prevents a type-safe API on ModuleContext, and
requires moving the API to be functions that take a ModuleContext as
a parameter.

This CL creates the new API, but doesn't convert all of the callers.

[1] https://go.googlesource.com/proposal/+/refs/heads/master/design/43651-type-parameters.md#no-parameterized-methods)

Bug: 316410648
Test: builds
Change-Id: I3e30d68b966b730efd968166a38a25cc144bd6de
This commit is contained in:
Colin Cross
2023-12-12 14:13:26 -08:00
parent e8eeec913f
commit 3c0a83d19f
12 changed files with 212 additions and 30 deletions
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3
android/makevars.go
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@@ -92,7 +92,8 @@ type MakeVarsContext interface {
ModuleDir(module blueprint.Module) string
ModuleSubDir(module blueprint.Module) string
ModuleType(module blueprint.Module) string
ModuleProvider(module blueprint.Module, key blueprint.ProviderKey) interface{}
ModuleProvider(module blueprint.Module, key blueprint.AnyProviderKey) any
moduleProvider(module blueprint.Module, key blueprint.AnyProviderKey) (any, bool)
BlueprintFile(module blueprint.Module) string
ModuleErrorf(module blueprint.Module, format string, args ...interface{})