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carbon-lang/toolchain/check/testdata/as/const.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/convert.carbon
//
// AUTOUPDATE
// TIP: To test this file alone, run:
// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/check/testdata/as/const.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/as/const.carbon
// --- add_const.carbon
library "[[@TEST_NAME]]";
class X {}
fn Init() -> X;
let value: X = Init();
var reference: X;
let ptr: X* = &reference;
fn Use() {
// TODO: Should some of these be valid without the `as`?
//@dump-sem-ir-begin
var unused i: const X = Init() as const X;
let unused v: const X = value as const X;
let unused a: const X* = &(reference as const X);
let unused b: const X* = ptr as const X*;
//@dump-sem-ir-end
}
// --- remove_const.carbon
library "[[@TEST_NAME]]";
class X {}
fn Init() -> const X;
let value: const X = Init();
fn Use() {
// TODO: Should some of these be valid without the `as`?
//@dump-sem-ir-begin
var unused i: X = Init() as X;
let unused v: X = value as X;
//@dump-sem-ir-end
}
// --- fail_cannot_remove_const.carbon
library "[[@TEST_NAME]]";
class X {}
var reference: const X;
let ptr: const X* = &reference;
fn Use() {
// CHECK:STDERR: fail_cannot_remove_const.carbon:[[@LINE+7]]:24: error: cannot convert expression of type `const X` to `X` with `as` [ConversionFailure]
// CHECK:STDERR: let unused a: X* = &(reference as X);
// CHECK:STDERR: ^~~~~~~~~~~~~~
// CHECK:STDERR: fail_cannot_remove_const.carbon:[[@LINE+4]]:24: note: type `const X` does not implement interface `Core.As(X)` [MissingImplInMemberAccessInContext]
// CHECK:STDERR: let unused a: X* = &(reference as X);
// CHECK:STDERR: ^~~~~~~~~~~~~~
// CHECK:STDERR:
let unused a: X* = &(reference as X);
// CHECK:STDERR: fail_cannot_remove_const.carbon:[[@LINE+7]]:22: error: cannot convert expression of type `const X*` to `X*` with `as` [ConversionFailure]
// CHECK:STDERR: let unused b: X* = ptr as X*;
// CHECK:STDERR: ^~~~~~~~~
// CHECK:STDERR: fail_cannot_remove_const.carbon:[[@LINE+4]]:22: note: type `const X*` does not implement interface `Core.As(X*)` [MissingImplInMemberAccessInContext]
// CHECK:STDERR: let unused b: X* = ptr as X*;
// CHECK:STDERR: ^~~~~~~~~
// CHECK:STDERR:
let unused b: X* = ptr as X*;
}
// --- unsafe_remove_const.carbon
library "[[@TEST_NAME]]";
class X {}
var reference: const X;
let ptr: const X* = &reference;
fn Use() {
//@dump-sem-ir-begin
let unused a: X* = &(reference unsafe as X);
let unused b: X* = ptr unsafe as X*;
//@dump-sem-ir-end
}
// CHECK:STDOUT: --- add_const.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %X: type = class_type @X [concrete]
// CHECK:STDOUT: %empty_struct_type: type = struct_type {} [concrete]
// CHECK:STDOUT: %Init.type: type = fn_type @Init [concrete]
// CHECK:STDOUT: %empty_tuple.type: type = tuple_type () [concrete]
// CHECK:STDOUT: %Init: %Init.type = struct_value () [concrete]
// CHECK:STDOUT: %ptr.db8: type = ptr_type %X [concrete]
// CHECK:STDOUT: %const: type = const_type %X [concrete]
// CHECK:STDOUT: %pattern_type.dfd: type = pattern_type %const [concrete]
// CHECK:STDOUT: %ptr.faf: type = ptr_type %const [concrete]
// CHECK:STDOUT: %pattern_type.7f7: type = pattern_type %ptr.faf [concrete]
// CHECK:STDOUT: %reference.var: ref %const = var file.%reference.var_patt [concrete]
// CHECK:STDOUT: %addr.c2d: %ptr.faf = addr_of %reference.var [concrete]
// CHECK:STDOUT: %Destroy.Op.type.1d8f74.3: type = fn_type @Destroy.Op.loc14_3.3 [concrete]
// CHECK:STDOUT: %Destroy.Op.1a2547.3: %Destroy.Op.type.1d8f74.3 = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Use() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: name_binding_decl {
// CHECK:STDOUT: %i.patt: %pattern_type.dfd = ref_binding_pattern i [concrete]
// CHECK:STDOUT: %i.var_patt: %pattern_type.dfd = var_pattern %i.patt [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT: %i.var: ref %const = var %i.var_patt
// CHECK:STDOUT: %Init.ref: %Init.type = name_ref Init, file.%Init.decl [concrete = constants.%Init]
// CHECK:STDOUT: %.loc14_3: ref %const = splice_block %i.var {}
// CHECK:STDOUT: %Init.call: init %X to %.loc14_3 = call %Init.ref()
// CHECK:STDOUT: %X.ref.loc14_43: type = name_ref X, file.%X.decl [concrete = constants.%X]
// CHECK:STDOUT: %const.loc14_37: type = const_type %X.ref.loc14_43 [concrete = constants.%const]
// CHECK:STDOUT: %.loc14_34.1: init %const = as_compatible %Init.call
// CHECK:STDOUT: %.loc14_34.2: init %const = converted %Init.call, %.loc14_34.1
// CHECK:STDOUT: assign %i.var, %.loc14_34.2
// CHECK:STDOUT: %.loc14_17: type = splice_block %const.loc14_17 [concrete = constants.%const] {
// CHECK:STDOUT: %X.ref.loc14_23: type = name_ref X, file.%X.decl [concrete = constants.%X]
// CHECK:STDOUT: %const.loc14_17: type = const_type %X.ref.loc14_23 [concrete = constants.%const]
// CHECK:STDOUT: }
// CHECK:STDOUT: %i: ref %const = ref_binding i, %i.var
// CHECK:STDOUT: name_binding_decl {
// CHECK:STDOUT: %v.patt: %pattern_type.dfd = value_binding_pattern v [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT: %value.ref: %X = name_ref value, file.%value
// CHECK:STDOUT: %X.ref.loc15_42: type = name_ref X, file.%X.decl [concrete = constants.%X]
// CHECK:STDOUT: %const.loc15_36: type = const_type %X.ref.loc15_42 [concrete = constants.%const]
// CHECK:STDOUT: %.loc15_33.1: %const = as_compatible %value.ref
// CHECK:STDOUT: %.loc15_33.2: %const = converted %value.ref, %.loc15_33.1
// CHECK:STDOUT: %.loc15_17: type = splice_block %const.loc15_17 [concrete = constants.%const] {
// CHECK:STDOUT: %X.ref.loc15_23: type = name_ref X, file.%X.decl [concrete = constants.%X]
// CHECK:STDOUT: %const.loc15_17: type = const_type %X.ref.loc15_23 [concrete = constants.%const]
// CHECK:STDOUT: }
// CHECK:STDOUT: %v: %const = value_binding v, %.loc15_33.2
// CHECK:STDOUT: name_binding_decl {
// CHECK:STDOUT: %a.patt: %pattern_type.7f7 = value_binding_pattern a [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT: %reference.ref: ref %X = name_ref reference, file.%reference [concrete = file.%reference.var]
// CHECK:STDOUT: %X.ref.loc16_49: type = name_ref X, file.%X.decl [concrete = constants.%X]
// CHECK:STDOUT: %const.loc16_43: type = const_type %X.ref.loc16_49 [concrete = constants.%const]
// CHECK:STDOUT: %.loc16_40.1: ref %const = as_compatible %reference.ref [concrete = constants.%reference.var]
// CHECK:STDOUT: %.loc16_40.2: ref %const = converted %reference.ref, %.loc16_40.1 [concrete = constants.%reference.var]
// CHECK:STDOUT: %addr: %ptr.faf = addr_of %.loc16_40.2 [concrete = constants.%addr.c2d]
// CHECK:STDOUT: %.loc16_24: type = splice_block %ptr.loc16 [concrete = constants.%ptr.faf] {
// CHECK:STDOUT: %X.ref.loc16_23: type = name_ref X, file.%X.decl [concrete = constants.%X]
// CHECK:STDOUT: %const.loc16_17: type = const_type %X.ref.loc16_23 [concrete = constants.%const]
// CHECK:STDOUT: %ptr.loc16: type = ptr_type %const.loc16_17 [concrete = constants.%ptr.faf]
// CHECK:STDOUT: }
// CHECK:STDOUT: %a: %ptr.faf = value_binding a, %addr
// CHECK:STDOUT: name_binding_decl {
// CHECK:STDOUT: %b.patt: %pattern_type.7f7 = value_binding_pattern b [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT: %ptr.ref: %ptr.db8 = name_ref ptr, file.%ptr.loc9_8
// CHECK:STDOUT: %X.ref.loc17_41: type = name_ref X, file.%X.decl [concrete = constants.%X]
// CHECK:STDOUT: %const.loc17_35: type = const_type %X.ref.loc17_41 [concrete = constants.%const]
// CHECK:STDOUT: %ptr.loc17_42: type = ptr_type %const.loc17_35 [concrete = constants.%ptr.faf]
// CHECK:STDOUT: %.loc17_32.1: %ptr.faf = as_compatible %ptr.ref
// CHECK:STDOUT: %.loc17_32.2: %ptr.faf = converted %ptr.ref, %.loc17_32.1
// CHECK:STDOUT: %.loc17_24: type = splice_block %ptr.loc17_24 [concrete = constants.%ptr.faf] {
// CHECK:STDOUT: %X.ref.loc17_23: type = name_ref X, file.%X.decl [concrete = constants.%X]
// CHECK:STDOUT: %const.loc17_17: type = const_type %X.ref.loc17_23 [concrete = constants.%const]
// CHECK:STDOUT: %ptr.loc17_24: type = ptr_type %const.loc17_17 [concrete = constants.%ptr.faf]
// CHECK:STDOUT: }
// CHECK:STDOUT: %b: %ptr.faf = value_binding b, %.loc17_32.2
// CHECK:STDOUT: %Destroy.Op.bound: <bound method> = bound_method %i.var, constants.%Destroy.Op.1a2547.3
// CHECK:STDOUT: %Destroy.Op.call: init %empty_tuple.type = call %Destroy.Op.bound(%i.var)
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Destroy.Op.loc14_3.1(%self.param: ref %empty_struct_type) = "no_op";
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Destroy.Op.loc14_3.2(%self.param: ref %X) {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Destroy.Op.loc14_3.3(%self.param: ref %const) {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @__global_init() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- remove_const.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %X: type = class_type @X [concrete]
// CHECK:STDOUT: %empty_struct_type: type = struct_type {} [concrete]
// CHECK:STDOUT: %const: type = const_type %X [concrete]
// CHECK:STDOUT: %Init.type: type = fn_type @Init [concrete]
// CHECK:STDOUT: %empty_tuple.type: type = tuple_type () [concrete]
// CHECK:STDOUT: %Init: %Init.type = struct_value () [concrete]
// CHECK:STDOUT: %pattern_type.6cb: type = pattern_type %X [concrete]
// CHECK:STDOUT: %Destroy.Op.type.1d8f74.2: type = fn_type @Destroy.Op.loc12_3.2 [concrete]
// CHECK:STDOUT: %Destroy.Op.1a2547.2: %Destroy.Op.type.1d8f74.2 = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Use() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: name_binding_decl {
// CHECK:STDOUT: %i.patt: %pattern_type.6cb = ref_binding_pattern i [concrete]
// CHECK:STDOUT: %i.var_patt: %pattern_type.6cb = var_pattern %i.patt [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT: %i.var: ref %X = var %i.var_patt
// CHECK:STDOUT: %Init.ref: %Init.type = name_ref Init, file.%Init.decl [concrete = constants.%Init]
// CHECK:STDOUT: %.loc12_3: ref %X = splice_block %i.var {}
// CHECK:STDOUT: %Init.call: init %const to %.loc12_3 = call %Init.ref()
// CHECK:STDOUT: %X.ref.loc12_31: type = name_ref X, file.%X.decl [concrete = constants.%X]
// CHECK:STDOUT: %.loc12_28.1: init %X = as_compatible %Init.call
// CHECK:STDOUT: %.loc12_28.2: init %X = converted %Init.call, %.loc12_28.1
// CHECK:STDOUT: assign %i.var, %.loc12_28.2
// CHECK:STDOUT: %X.ref.loc12_17: type = name_ref X, file.%X.decl [concrete = constants.%X]
// CHECK:STDOUT: %i: ref %X = ref_binding i, %i.var
// CHECK:STDOUT: name_binding_decl {
// CHECK:STDOUT: %v.patt: %pattern_type.6cb = value_binding_pattern v [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT: %value.ref: %const = name_ref value, file.%value
// CHECK:STDOUT: %X.ref.loc13_30: type = name_ref X, file.%X.decl [concrete = constants.%X]
// CHECK:STDOUT: %.loc13_27.1: %X = as_compatible %value.ref
// CHECK:STDOUT: %.loc13_27.2: %X = converted %value.ref, %.loc13_27.1
// CHECK:STDOUT: %X.ref.loc13_17: type = name_ref X, file.%X.decl [concrete = constants.%X]
// CHECK:STDOUT: %v: %X = value_binding v, %.loc13_27.2
// CHECK:STDOUT: %Destroy.Op.bound: <bound method> = bound_method %i.var, constants.%Destroy.Op.1a2547.2
// CHECK:STDOUT: %Destroy.Op.call: init %empty_tuple.type = call %Destroy.Op.bound(%i.var)
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Destroy.Op.loc12_3.1(%self.param: ref %empty_struct_type) = "no_op";
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Destroy.Op.loc12_3.2(%self.param: ref %X) {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @__global_init() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- unsafe_remove_const.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %X: type = class_type @X [concrete]
// CHECK:STDOUT: %const: type = const_type %X [concrete]
// CHECK:STDOUT: %ptr.faf: type = ptr_type %const [concrete]
// CHECK:STDOUT: %ptr.db8: type = ptr_type %X [concrete]
// CHECK:STDOUT: %pattern_type.990: type = pattern_type %ptr.db8 [concrete]
// CHECK:STDOUT: %reference.var: ref %X = var file.%reference.var_patt [concrete]
// CHECK:STDOUT: %addr.c0f: %ptr.db8 = addr_of %reference.var [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Use() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: name_binding_decl {
// CHECK:STDOUT: %a.patt: %pattern_type.990 = value_binding_pattern a [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT: %reference.ref: ref %const = name_ref reference, file.%reference [concrete = file.%reference.var]
// CHECK:STDOUT: %X.ref.loc11_44: type = name_ref X, file.%X.decl [concrete = constants.%X]
// CHECK:STDOUT: %.loc11_41.1: ref %X = as_compatible %reference.ref [concrete = constants.%reference.var]
// CHECK:STDOUT: %.loc11_41.2: ref %X = converted %reference.ref, %.loc11_41.1 [concrete = constants.%reference.var]
// CHECK:STDOUT: %addr: %ptr.db8 = addr_of %.loc11_41.2 [concrete = constants.%addr.c0f]
// CHECK:STDOUT: %.loc11_18: type = splice_block %ptr.loc11 [concrete = constants.%ptr.db8] {
// CHECK:STDOUT: %X.ref.loc11_17: type = name_ref X, file.%X.decl [concrete = constants.%X]
// CHECK:STDOUT: %ptr.loc11: type = ptr_type %X.ref.loc11_17 [concrete = constants.%ptr.db8]
// CHECK:STDOUT: }
// CHECK:STDOUT: %a: %ptr.db8 = value_binding a, %addr
// CHECK:STDOUT: name_binding_decl {
// CHECK:STDOUT: %b.patt: %pattern_type.990 = value_binding_pattern b [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT: %ptr.ref: %ptr.faf = name_ref ptr, file.%ptr.loc7_8
// CHECK:STDOUT: %X.ref.loc12_36: type = name_ref X, file.%X.decl [concrete = constants.%X]
// CHECK:STDOUT: %ptr.loc12_37: type = ptr_type %X.ref.loc12_36 [concrete = constants.%ptr.db8]
// CHECK:STDOUT: %.loc12_33.1: %ptr.db8 = as_compatible %ptr.ref
// CHECK:STDOUT: %.loc12_33.2: %ptr.db8 = converted %ptr.ref, %.loc12_33.1
// CHECK:STDOUT: %.loc12_18: type = splice_block %ptr.loc12_18 [concrete = constants.%ptr.db8] {
// CHECK:STDOUT: %X.ref.loc12_17: type = name_ref X, file.%X.decl [concrete = constants.%X]
// CHECK:STDOUT: %ptr.loc12_18: type = ptr_type %X.ref.loc12_17 [concrete = constants.%ptr.db8]
// CHECK:STDOUT: }
// CHECK:STDOUT: %b: %ptr.db8 = value_binding b, %.loc12_33.2
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @__global_init() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT:
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