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Make {} as Class an initializing expression. (#6882)

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Previously we forced a temporary materialization, resulting in it being
treated as an ephemeral reference expression. This change allows

```carbon
var x: Class = {} as Class;
```

even when `Class` is not copyable.
This commit is contained in:
Richard Smith
2026-03-11 20:21:21 +00:00
committed by GitHub
parent 6ac561afe9
commit 2e5b195813
45 changed files with 592 additions and 740 deletions
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toolchain/check/testdata/function/generic/deduce.carbon
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+4 -4
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@@ -657,12 +657,12 @@ fn F() {
// CHECK:STDOUT: %ExplicitAndAlsoDeduced.specific_fn: <specific function> = specific_function %ExplicitAndAlsoDeduced.ref, @ExplicitAndAlsoDeduced(constants.%A) [concrete = constants.%ExplicitAndAlsoDeduced.specific_fn.1f3]
// CHECK:STDOUT: %.loc11_37.2: ref %A = temporary_storage
// CHECK:STDOUT: %.loc11_37.3: init %A to %.loc11_37.2 = class_init () [concrete = constants.%A.val]
// CHECK:STDOUT: %.loc11_37.4: ref %A = temporary %.loc11_37.2, %.loc11_37.3
// CHECK:STDOUT: %.loc11_37.5: ref %A = converted %.loc11_37.1, %.loc11_37.4
// CHECK:STDOUT: %.loc11_37.4: init %A = converted %.loc11_37.1, %.loc11_37.3 [concrete = constants.%A.val]
// CHECK:STDOUT: %.loc11_37.5: ref %A = temporary %.loc11_37.2, %.loc11_37.4
// CHECK:STDOUT: %.loc11_37.6: %A = acquire_value %.loc11_37.5
// CHECK:STDOUT: %ExplicitAndAlsoDeduced.call: init %ptr.643 = call %ExplicitAndAlsoDeduced.specific_fn(%.loc11_37.6)
// CHECK:STDOUT: %Destroy.Op.bound: <bound method> = bound_method %.loc11_37.4, constants.%Destroy.Op
// CHECK:STDOUT: %Destroy.Op.call: init %empty_tuple.type = call %Destroy.Op.bound(%.loc11_37.4)
// CHECK:STDOUT: %Destroy.Op.bound: <bound method> = bound_method %.loc11_37.5, constants.%Destroy.Op
// CHECK:STDOUT: %Destroy.Op.call: init %empty_tuple.type = call %Destroy.Op.bound(%.loc11_37.5)
// CHECK:STDOUT: return %ExplicitAndAlsoDeduced.call
// CHECK:STDOUT: }
// CHECK:STDOUT: