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carbon-lang/toolchain/check/testdata/pointer/convert_qualifiers.carbon
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Richard Smith cefa0397bb More fixes to package and library fingerprinting. (#7297) 
Fix import logic to make all imported packages be children of the
`NameScopeId::Package` scope. Previously, indirectly-imported packages
would end up as children of their importing package's scope, which
resulted in them not being treated as packages at all, and in particular
not being fingerprinted as packages.

Fixing that caused a failure in the fingerprinting logic as we started
to encounter packages with no correspoding import scopes. Instead of
looking for import scopes, use a simpler mechanism to map packages to
their package names, and clean up.

Unfortunately the latter change churns all the fingerprints again :(
Hopefully this is the last time for a while.
2026-06-04 17:41:46 +00:00

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// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
// Exceptions. See /LICENSE for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
// INCLUDE-FILE: toolchain/testing/testdata/min_prelude/int.carbon
//
// AUTOUPDATE
// TIP: To test this file alone, run:
// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/check/testdata/pointer/convert_qualifiers.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/pointer/convert_qualifiers.carbon
// --- same_or_added_qualifiers.carbon
library "[[@TEST_NAME]]";
class X {}
fn TakeConst(p: const X*);
fn TakeNonConst(p: X*);
fn NonConst(p: X*) {
//@dump-sem-ir-begin
TakeNonConst(p);
TakeConst(p);
//@dump-sem-ir-end
}
fn Const(p: const X*) {
//@dump-sem-ir-begin
TakeConst(p);
//@dump-sem-ir-end
}
// Same thing, but the pointee type happens to be a pointer.
fn TakeConstConst(p: const (const X*)*);
fn NonConstConst(p: const X**) {
//@dump-sem-ir-begin
TakeConstConst(p);
//@dump-sem-ir-end
}
// --- fail_removed_qualifiers.carbon
library "[[@TEST_NAME]]";
class X {}
fn TakeNonConst(p: X*);
// CHECK:STDERR: fail_removed_qualifiers.carbon:[[@LINE+10]]:38: error: cannot implicitly convert expression of type `const X*` to `X*` [ConversionFailure]
// CHECK:STDERR: fn Const(p: const X*) { TakeNonConst(p); }
// CHECK:STDERR: ^
// CHECK:STDERR: fail_removed_qualifiers.carbon:[[@LINE+7]]:38: note: type `const X*` does not implement interface `Core.ImplicitAs(X*)` [MissingImplInMemberAccessInContext]
// CHECK:STDERR: fn Const(p: const X*) { TakeNonConst(p); }
// CHECK:STDERR: ^
// CHECK:STDERR: fail_removed_qualifiers.carbon:[[@LINE-8]]:17: note: initializing function parameter [InCallToFunctionParam]
// CHECK:STDERR: fn TakeNonConst(p: X*);
// CHECK:STDERR: ^~~~~
// CHECK:STDERR:
fn Const(p: const X*) { TakeNonConst(p); }
// --- fail_todo_nested_qualifiers.carbon
library "[[@TEST_NAME]]";
class X {}
fn TakeConstConst(p: const (const X*)*);
// TODO: We should allow these conversions.
fn NonConstNonConst(p: X**) {
//@dump-sem-ir-begin
// CHECK:STDERR: fail_todo_nested_qualifiers.carbon:[[@LINE+10]]:18: error: cannot implicitly convert expression of type `X**` to `const (const X*)*` [ConversionFailure]
// CHECK:STDERR: TakeConstConst(p);
// CHECK:STDERR: ^
// CHECK:STDERR: fail_todo_nested_qualifiers.carbon:[[@LINE+7]]:18: note: type `X**` does not implement interface `Core.ImplicitAs(const (const X*)*)` [MissingImplInMemberAccessInContext]
// CHECK:STDERR: TakeConstConst(p);
// CHECK:STDERR: ^
// CHECK:STDERR: fail_todo_nested_qualifiers.carbon:[[@LINE-12]]:19: note: initializing function parameter [InCallToFunctionParam]
// CHECK:STDERR: fn TakeConstConst(p: const (const X*)*);
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~
// CHECK:STDERR:
TakeConstConst(p);
//@dump-sem-ir-end
}
fn ConstNonConst(p: const (X*)*) {
//@dump-sem-ir-begin
// CHECK:STDERR: fail_todo_nested_qualifiers.carbon:[[@LINE+10]]:18: error: cannot implicitly convert expression of type `const (X*)*` to `const (const X*)*` [ConversionFailure]
// CHECK:STDERR: TakeConstConst(p);
// CHECK:STDERR: ^
// CHECK:STDERR: fail_todo_nested_qualifiers.carbon:[[@LINE+7]]:18: note: type `const (X*)*` does not implement interface `Core.ImplicitAs(const (const X*)*)` [MissingImplInMemberAccessInContext]
// CHECK:STDERR: TakeConstConst(p);
// CHECK:STDERR: ^
// CHECK:STDERR: fail_todo_nested_qualifiers.carbon:[[@LINE-28]]:19: note: initializing function parameter [InCallToFunctionParam]
// CHECK:STDERR: fn TakeConstConst(p: const (const X*)*);
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~
// CHECK:STDERR:
TakeConstConst(p);
//@dump-sem-ir-end
}
// --- fail_nested_added_qualifiers.carbon
library "[[@TEST_NAME]]";
class X {}
fn TakeNonConstConst(p: (const X*)*);
// CHECK:STDERR: fail_nested_added_qualifiers.carbon:[[@LINE+10]]:49: error: cannot implicitly convert expression of type `X**` to `const X**` [ConversionFailure]
// CHECK:STDERR: fn NonConstNonConst(p: X**) { TakeNonConstConst(p); }
// CHECK:STDERR: ^
// CHECK:STDERR: fail_nested_added_qualifiers.carbon:[[@LINE+7]]:49: note: type `X**` does not implement interface `Core.ImplicitAs(const X**)` [MissingImplInMemberAccessInContext]
// CHECK:STDERR: fn NonConstNonConst(p: X**) { TakeNonConstConst(p); }
// CHECK:STDERR: ^
// CHECK:STDERR: fail_nested_added_qualifiers.carbon:[[@LINE-8]]:22: note: initializing function parameter [InCallToFunctionParam]
// CHECK:STDERR: fn TakeNonConstConst(p: (const X*)*);
// CHECK:STDERR: ^~~~~~~~~~~~~~
// CHECK:STDERR:
fn NonConstNonConst(p: X**) { TakeNonConstConst(p); }
// CHECK:STDOUT: --- same_or_added_qualifiers.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %X: type = class_type @X [concrete]
// CHECK:STDOUT: %const.435: type = const_type %X [concrete]
// CHECK:STDOUT: %ptr.faf: type = ptr_type %const.435 [concrete]
// CHECK:STDOUT: %TakeConst.type: type = fn_type @TakeConst [concrete]
// CHECK:STDOUT: %empty_tuple.type: type = tuple_type () [concrete]
// CHECK:STDOUT: %TakeConst: %TakeConst.type = struct_value () [concrete]
// CHECK:STDOUT: %ptr.db8: type = ptr_type %X [concrete]
// CHECK:STDOUT: %TakeNonConst.type: type = fn_type @TakeNonConst [concrete]
// CHECK:STDOUT: %TakeNonConst: %TakeNonConst.type = struct_value () [concrete]
// CHECK:STDOUT: %const.95a: type = const_type %ptr.faf [concrete]
// CHECK:STDOUT: %ptr.b53: type = ptr_type %const.95a [concrete]
// CHECK:STDOUT: %TakeConstConst.type: type = fn_type @TakeConstConst [concrete]
// CHECK:STDOUT: %TakeConstConst: %TakeConstConst.type = struct_value () [concrete]
// CHECK:STDOUT: %ptr.845: type = ptr_type %ptr.faf [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @NonConst(%p.param: %ptr.db8) {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %TakeNonConst.ref: %TakeNonConst.type = name_ref TakeNonConst, file.%TakeNonConst.decl [concrete = constants.%TakeNonConst]
// CHECK:STDOUT: %p.ref.loc11: %ptr.db8 = name_ref p, %p
// CHECK:STDOUT: %TakeNonConst.call: init %empty_tuple.type = call %TakeNonConst.ref(%p.ref.loc11)
// CHECK:STDOUT: %TakeConst.ref: %TakeConst.type = name_ref TakeConst, file.%TakeConst.decl [concrete = constants.%TakeConst]
// CHECK:STDOUT: %p.ref.loc12: %ptr.db8 = name_ref p, %p
// CHECK:STDOUT: %.loc12_13.1: %ptr.faf = as_compatible %p.ref.loc12
// CHECK:STDOUT: %.loc12_13.2: %ptr.faf = converted %p.ref.loc12, %.loc12_13.1
// CHECK:STDOUT: %TakeConst.call: init %empty_tuple.type = call %TakeConst.ref(%.loc12_13.2)
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Const(%p.param: %ptr.faf) {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %TakeConst.ref: %TakeConst.type = name_ref TakeConst, file.%TakeConst.decl [concrete = constants.%TakeConst]
// CHECK:STDOUT: %p.ref: %ptr.faf = name_ref p, %p
// CHECK:STDOUT: %TakeConst.call: init %empty_tuple.type = call %TakeConst.ref(%p.ref)
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @NonConstConst(%p.param: %ptr.845) {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %TakeConstConst.ref: %TakeConstConst.type = name_ref TakeConstConst, file.%TakeConstConst.decl [concrete = constants.%TakeConstConst]
// CHECK:STDOUT: %p.ref: %ptr.845 = name_ref p, %p
// CHECK:STDOUT: %.loc25_18.1: %ptr.b53 = as_compatible %p.ref
// CHECK:STDOUT: %.loc25_18.2: %ptr.b53 = converted %p.ref, %.loc25_18.1
// CHECK:STDOUT: %TakeConstConst.call: init %empty_tuple.type = call %TakeConstConst.ref(%.loc25_18.2)
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_todo_nested_qualifiers.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %X: type = class_type @X [concrete]
// CHECK:STDOUT: %const.435: type = const_type %X [concrete]
// CHECK:STDOUT: %ptr.faf: type = ptr_type %const.435 [concrete]
// CHECK:STDOUT: %const.95a: type = const_type %ptr.faf [concrete]
// CHECK:STDOUT: %ptr.b53: type = ptr_type %const.95a [concrete]
// CHECK:STDOUT: %TakeConstConst.type: type = fn_type @TakeConstConst [concrete]
// CHECK:STDOUT: %empty_tuple.type: type = tuple_type () [concrete]
// CHECK:STDOUT: %TakeConstConst: %TakeConstConst.type = struct_value () [concrete]
// CHECK:STDOUT: %ptr.db8: type = ptr_type %X [concrete]
// CHECK:STDOUT: %ptr.9ae: type = ptr_type %ptr.db8 [concrete]
// CHECK:STDOUT: %const.d43: type = const_type %ptr.db8 [concrete]
// CHECK:STDOUT: %ptr.060: type = ptr_type %const.d43 [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @NonConstNonConst(%p.param: %ptr.9ae) {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %TakeConstConst.ref: %TakeConstConst.type = name_ref TakeConstConst, file.%TakeConstConst.decl [concrete = constants.%TakeConstConst]
// CHECK:STDOUT: %p.ref: %ptr.9ae = name_ref p, %p
// CHECK:STDOUT: %.loc22: %ptr.b53 = converted %p.ref, <error> [concrete = <error>]
// CHECK:STDOUT: %TakeConstConst.call: init %empty_tuple.type = call %TakeConstConst.ref(<error>)
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @ConstNonConst(%p.param: %ptr.060) {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %TakeConstConst.ref: %TakeConstConst.type = name_ref TakeConstConst, file.%TakeConstConst.decl [concrete = constants.%TakeConstConst]
// CHECK:STDOUT: %p.ref: %ptr.060 = name_ref p, %p
// CHECK:STDOUT: %.loc38: %ptr.b53 = converted %p.ref, <error> [concrete = <error>]
// CHECK:STDOUT: %TakeConstConst.call: init %empty_tuple.type = call %TakeConstConst.ref(<error>)
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT:
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