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carbon-lang/toolchain/check/testdata/let/convert.carbon
T
Richard Smith 05cc09daca Fix cross-package signature mismatches. (#7232)
Fixes link failures when referencing a symbol involving a fingerprint
from a different package.

Previously we included the `Namespace`'s `import_id` as part of its
fingerprint, which caused local and imported namespaces to get different
fingerprints. We now store the `import_id` on the `NameScope` instead of
on the `Namespace` inst to avoid this problem.

Also, when we reach a package-level `NameScopeId`, consistently
fingerprint it as a (package name, library name) pair. Previously the
fingerprinting depended on whether it was imported or not, as an
imported `NameScopeId` had a parent scope (the current package). We need
to include the library name here so that private entities with the same
name in different libraries have different fingerprints.
2026-05-21 00:02:29 +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/let/convert.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/let/convert.carbon
// --- convert.carbon
library "[[@TEST_NAME]]";
fn F() -> i32 {
var v: (i32, i32, i32) = (1, 2, 3);
// Convert from object representation to value representation.
//@dump-sem-ir-begin
let w: (i32, i32, i32) = v;
//@dump-sem-ir-end
return w.1;
}
// --- fail_let_bound_to_ref_not_mutable.carbon
library "[[@TEST_NAME]]";
fn G() {
var a: i32 = 0;
let unused n: i32 = a;
// CHECK:STDERR: fail_let_bound_to_ref_not_mutable.carbon:[[@LINE+11]]:3: error: expression is not assignable [AssignmentToNonAssignable]
// CHECK:STDERR: n = 1;
// CHECK:STDERR: ^
// CHECK:STDERR:
// CHECK:STDERR: fail_let_bound_to_ref_not_mutable.carbon:[[@LINE-5]]:14: error: variable `n` marked `unused` but used [UnusedButUsed]
// CHECK:STDERR: let unused n: i32 = a;
// CHECK:STDERR: ^~~~~~
// CHECK:STDERR: fail_let_bound_to_ref_not_mutable.carbon:[[@LINE+4]]:3: note: usage here [UnusedButUsedHere]
// CHECK:STDERR: n = 1;
// CHECK:STDERR: ^
// CHECK:STDERR:
n = 1;
}
// CHECK:STDOUT: --- convert.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %int_32: Core.IntLiteral = int_value 32 [concrete]
// CHECK:STDOUT: %i32: type = class_type @Int, @Int(%int_32) [concrete]
// CHECK:STDOUT: %tuple.type.ff9: type = tuple_type (type, type, type) [concrete]
// CHECK:STDOUT: %tuple.bed: %tuple.type.ff9 = tuple_value (%i32, %i32, %i32) [concrete]
// CHECK:STDOUT: %tuple.type.a64: type = tuple_type (%i32, %i32, %i32) [concrete]
// CHECK:STDOUT: %pattern_type.3ff: type = pattern_type %tuple.type.a64 [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @F() -> out %return.param: %i32 {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: name_binding_decl {
// CHECK:STDOUT: %w.patt: %pattern_type.3ff = value_binding_pattern w [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT: %v.ref: ref %tuple.type.a64 = name_ref v, %v
// CHECK:STDOUT: %.loc8_24.1: type = splice_block %.loc8_24.3 [concrete = constants.%tuple.type.a64] {
// CHECK:STDOUT: %i32.loc8_11: type = type_literal constants.%i32 [concrete = constants.%i32]
// CHECK:STDOUT: %i32.loc8_16: type = type_literal constants.%i32 [concrete = constants.%i32]
// CHECK:STDOUT: %i32.loc8_21: type = type_literal constants.%i32 [concrete = constants.%i32]
// CHECK:STDOUT: %.loc8_24.2: %tuple.type.ff9 = tuple_literal (%i32.loc8_11, %i32.loc8_16, %i32.loc8_21) [concrete = constants.%tuple.bed]
// CHECK:STDOUT: %.loc8_24.3: type = converted %.loc8_24.2, constants.%tuple.type.a64 [concrete = constants.%tuple.type.a64]
// CHECK:STDOUT: }
// CHECK:STDOUT: %tuple.elem0.loc8: ref %i32 = tuple_access %v.ref, element0
// CHECK:STDOUT: %.loc8_28.1: %i32 = acquire_value %tuple.elem0.loc8
// CHECK:STDOUT: %tuple.elem1.loc8: ref %i32 = tuple_access %v.ref, element1
// CHECK:STDOUT: %.loc8_28.2: %i32 = acquire_value %tuple.elem1.loc8
// CHECK:STDOUT: %tuple.elem2.loc8: ref %i32 = tuple_access %v.ref, element2
// CHECK:STDOUT: %.loc8_28.3: %i32 = acquire_value %tuple.elem2.loc8
// CHECK:STDOUT: %tuple: %tuple.type.a64 = tuple_value (%.loc8_28.1, %.loc8_28.2, %.loc8_28.3)
// CHECK:STDOUT: %.loc8_28.4: %tuple.type.a64 = converted %v.ref, %tuple
// CHECK:STDOUT: %w: %tuple.type.a64 = value_binding w, %.loc8_28.4
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT: