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Add CallAction to allow deferring calls (#7682)

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Calls with template callee or args can now be deferred via an
InstAction. This allows code like this to check:

```carbon
import Cpp inline '''
template<typename T>
struct C {};
''';

fn F(generic T: type) {
  let unused c: Cpp.C(T) = Cpp.C(T).C();
}
```
This commit is contained in:
Nicholas Bishop
2026-08-28 18:00:58 +00:00
committed by GitHub
parent 0ea8fb2e74
commit f519cccaf2
16 changed files with 742 additions and 537 deletions
Download Patch File Download Diff File Expand all files Collapse all files
toolchain/check/testdata/interop/cpp/class/import/template.carbon
Vendored
+41
View File
@@ -118,6 +118,47 @@ fn F(ref b: B(i32)) {
}
//@dump-sem-ir-end
// --- let_cpp_template_constructor.carbon
library "[[@TEST_NAME]]";
import Cpp inline '''
template<typename T>
struct A {};
''';
// @dump-sem-ir-begin
fn F(generic T: type) {
let unused a: Cpp.A(T) = Cpp.A(T).A();
}
fn G() {
F(i32);
}
// @dump-sem-ir-end
// --- fail_todo_var_cpp_template_constructor.carbon
library "[[@TEST_NAME]]";
import Cpp inline '''
template<typename T>
struct A {};
''';
fn F(generic T: type) {
var unused a: Cpp.A(T) = Cpp.A(T).A();
}
fn G() {
// CHECK:STDERR: fail_todo_var_cpp_template_constructor.carbon:[[@LINE+7]]:3: error: unable to monomorphize specific `F(i32)` [ResolvingSpecificHere]
// CHECK:STDERR: F(i32);
// CHECK:STDERR: ^
// CHECK:STDERR: fail_todo_var_cpp_template_constructor.carbon:[[@LINE-7]]:3: note: value of type `<bound method>` is not callable [CallToNonCallable]
// CHECK:STDERR: var unused a: Cpp.A(T) = Cpp.A(T).A();
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~
// CHECK:STDERR:
F(i32);
}
// CHECK:STDOUT: --- use_class_template.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
toolchain/check/testdata/interop/cpp/template/generic_call.carbon
Vendored
+7 -10
View File
@@ -24,19 +24,16 @@ library "[[@TEST_NAME]]";
import Cpp library "header.h";
fn F[T: type](unused x: T) {
// TODO: This should be treated as being template-dependent on T,
// and we should perform the call during monomorphization.
// CHECK:STDERR: fail_todo_generic_call.carbon:[[@LINE+8]]:3: error: value of type `<dependent type>` is not callable [CallToNonCallable]
// CHECK:STDERR: var unused v: Cpp.S(T);
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~
// CHECK:STDERR:
// CHECK:STDERR: fail_todo_generic_call.carbon:[[@LINE+4]]:3: error: value of type `<dependent type>` is not callable [CallToNonCallable]
// CHECK:STDERR: var unused v: Cpp.S(T);
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~
// CHECK:STDERR:
var unused v: Cpp.S(T);
}
fn G() {
// CHECK:STDERR: fail_todo_generic_call.carbon:[[@LINE+7]]:3: error: unable to monomorphize specific `F(Cpp.X)` [ResolvingSpecificHere]
// CHECK:STDERR: F({} as Cpp.X);
// CHECK:STDERR: ^
// CHECK:STDERR: fail_todo_generic_call.carbon:[[@LINE-7]]:3: note: value of type `<bound method>` is not callable [CallToNonCallable]
// CHECK:STDERR: var unused v: Cpp.S(T);
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~
// CHECK:STDERR:
F({} as Cpp.X);
}