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carbon-lang/toolchain/check/testdata/function/declaration/fail_redecl.carbon
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Jon Ross-Perkins 04d534abee Remove the no_prelude directory, using --no-prelude-import directly (#5607) 
People seemed receptive [on
#toolchain](https://discord.com/channels/655572317891461132/655578254970716160/1379196447827689553),
so proceeding.

For the two name conflicts, I've set it up so that there's a
"foo.carbon" and "foo_with_prelude.carbon", to indicate that the
no-prelude approach is preferred (with a shorter name).

Note min_prelude will require a little more work/thought, I want to
avoid adding `--custom-core` etc.
2025-06-04 16:56:03 +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
//
// TODO: Add ranges and switch to "--dump-sem-ir-ranges=only".
// EXTRA-ARGS: --no-prelude-import --dump-sem-ir-ranges=if-present
//
// AUTOUPDATE
// TIP: To test this file alone, run:
// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/check/testdata/function/declaration/fail_redecl.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/function/declaration/fail_redecl.carbon
fn A();
// CHECK:STDERR: fail_redecl.carbon:[[@LINE+7]]:1: error: redeclaration of `fn A` is redundant [RedeclRedundant]
// CHECK:STDERR: fn A();
// CHECK:STDERR: ^~~~~~~
// CHECK:STDERR: fail_redecl.carbon:[[@LINE-4]]:1: note: previously declared here [RedeclPrevDecl]
// CHECK:STDERR: fn A();
// CHECK:STDERR: ^~~~~~~
// CHECK:STDERR:
fn A();
fn B(x: ());
// CHECK:STDERR: fail_redecl.carbon:[[@LINE+7]]:1: error: redeclaration of `fn B` is redundant [RedeclRedundant]
// CHECK:STDERR: fn B(x: ());
// CHECK:STDERR: ^~~~~~~~~~~~
// CHECK:STDERR: fail_redecl.carbon:[[@LINE-4]]:1: note: previously declared here [RedeclPrevDecl]
// CHECK:STDERR: fn B(x: ());
// CHECK:STDERR: ^~~~~~~~~~~~
// CHECK:STDERR:
fn B(x: ());
fn C();
// CHECK:STDERR: fail_redecl.carbon:[[@LINE+7]]:1: error: redeclaration differs because of parameter count of 1 [RedeclParamCountDiffers]
// CHECK:STDERR: fn C(x: ());
// CHECK:STDERR: ^~~~~~~~~~~~
// CHECK:STDERR: fail_redecl.carbon:[[@LINE-4]]:1: note: previously declared with parameter count of 0 [RedeclParamCountPrevious]
// CHECK:STDERR: fn C();
// CHECK:STDERR: ^~~~~~~
// CHECK:STDERR:
fn C(x: ());
fn D() {}
// CHECK:STDERR: fail_redecl.carbon:[[@LINE+7]]:1: error: redeclaration of `fn D` is redundant [RedeclRedundant]
// CHECK:STDERR: fn D();
// CHECK:STDERR: ^~~~~~~
// CHECK:STDERR: fail_redecl.carbon:[[@LINE-4]]:1: note: previously declared here [RedeclPrevDecl]
// CHECK:STDERR: fn D() {}
// CHECK:STDERR: ^~~~~~~~
// CHECK:STDERR:
fn D();
fn E() {}
// CHECK:STDERR: fail_redecl.carbon:[[@LINE+7]]:1: error: redefinition of `fn E` [RedeclRedef]
// CHECK:STDERR: fn E() {}
// CHECK:STDERR: ^~~~~~~~
// CHECK:STDERR: fail_redecl.carbon:[[@LINE-4]]:1: note: previously defined here [RedeclPrevDef]
// CHECK:STDERR: fn E() {}
// CHECK:STDERR: ^~~~~~~~
// CHECK:STDERR:
fn E() {}
// CHECK:STDOUT: --- fail_redecl.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %A.type: type = fn_type @A [concrete]
// CHECK:STDOUT: %empty_tuple.type: type = tuple_type () [concrete]
// CHECK:STDOUT: %A: %A.type = struct_value () [concrete]
// CHECK:STDOUT: %pattern_type: type = pattern_type %empty_tuple.type [concrete]
// CHECK:STDOUT: %B.type: type = fn_type @B [concrete]
// CHECK:STDOUT: %B: %B.type = struct_value () [concrete]
// CHECK:STDOUT: %C.type.de0bfe.1: type = fn_type @C.1 [concrete]
// CHECK:STDOUT: %C.1b0370.1: %C.type.de0bfe.1 = struct_value () [concrete]
// CHECK:STDOUT: %C.type.de0bfe.2: type = fn_type @C.2 [concrete]
// CHECK:STDOUT: %C.1b0370.2: %C.type.de0bfe.2 = struct_value () [concrete]
// CHECK:STDOUT: %D.type: type = fn_type @D [concrete]
// CHECK:STDOUT: %D: %D.type = struct_value () [concrete]
// CHECK:STDOUT: %E.type.851869.1: type = fn_type @E.1 [concrete]
// CHECK:STDOUT: %E.237d29.1: %E.type.851869.1 = struct_value () [concrete]
// CHECK:STDOUT: %E.type.851869.2: type = fn_type @E.2 [concrete]
// CHECK:STDOUT: %E.237d29.2: %E.type.851869.2 = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [concrete] {
// CHECK:STDOUT: .A = %A.decl.loc14
// CHECK:STDOUT: .B = %B.decl.loc24
// CHECK:STDOUT: .C = %C.decl.loc34
// CHECK:STDOUT: .D = %D.decl.loc44
// CHECK:STDOUT: .E = %E.decl.loc54
// CHECK:STDOUT: }
// CHECK:STDOUT: %A.decl.loc14: %A.type = fn_decl @A [concrete = constants.%A] {} {}
// CHECK:STDOUT: %A.decl.loc22: %A.type = fn_decl @A [concrete = constants.%A] {} {}
// CHECK:STDOUT: %B.decl.loc24: %B.type = fn_decl @B [concrete = constants.%B] {
// CHECK:STDOUT: %x.patt: %pattern_type = binding_pattern x [concrete]
// CHECK:STDOUT: %x.param_patt: %pattern_type = value_param_pattern %x.patt, call_param0 [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %x.param.loc24: %empty_tuple.type = value_param call_param0
// CHECK:STDOUT: %.loc24_10.1: type = splice_block %.loc24_10.3 [concrete = constants.%empty_tuple.type] {
// CHECK:STDOUT: %.loc24_10.2: %empty_tuple.type = tuple_literal ()
// CHECK:STDOUT: %.loc24_10.3: type = converted %.loc24_10.2, constants.%empty_tuple.type [concrete = constants.%empty_tuple.type]
// CHECK:STDOUT: }
// CHECK:STDOUT: %x.loc24: %empty_tuple.type = bind_name x, %x.param.loc24
// CHECK:STDOUT: }
// CHECK:STDOUT: %B.decl.loc32: %B.type = fn_decl @B [concrete = constants.%B] {
// CHECK:STDOUT: %x.patt: %pattern_type = binding_pattern x [concrete]
// CHECK:STDOUT: %x.param_patt: %pattern_type = value_param_pattern %x.patt, call_param0 [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %x.param.loc32: %empty_tuple.type = value_param call_param0
// CHECK:STDOUT: %.loc32_10.1: type = splice_block %.loc32_10.3 [concrete = constants.%empty_tuple.type] {
// CHECK:STDOUT: %.loc32_10.2: %empty_tuple.type = tuple_literal ()
// CHECK:STDOUT: %.loc32_10.3: type = converted %.loc32_10.2, constants.%empty_tuple.type [concrete = constants.%empty_tuple.type]
// CHECK:STDOUT: }
// CHECK:STDOUT: %x.loc32: %empty_tuple.type = bind_name x, %x.param.loc32
// CHECK:STDOUT: }
// CHECK:STDOUT: %C.decl.loc34: %C.type.de0bfe.1 = fn_decl @C.1 [concrete = constants.%C.1b0370.1] {} {}
// CHECK:STDOUT: %C.decl.loc42: %C.type.de0bfe.2 = fn_decl @C.2 [concrete = constants.%C.1b0370.2] {
// CHECK:STDOUT: %x.patt: %pattern_type = binding_pattern x [concrete]
// CHECK:STDOUT: %x.param_patt: %pattern_type = value_param_pattern %x.patt, call_param0 [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %x.param: %empty_tuple.type = value_param call_param0
// CHECK:STDOUT: %.loc42_10.1: type = splice_block %.loc42_10.3 [concrete = constants.%empty_tuple.type] {
// CHECK:STDOUT: %.loc42_10.2: %empty_tuple.type = tuple_literal ()
// CHECK:STDOUT: %.loc42_10.3: type = converted %.loc42_10.2, constants.%empty_tuple.type [concrete = constants.%empty_tuple.type]
// CHECK:STDOUT: }
// CHECK:STDOUT: %x: %empty_tuple.type = bind_name x, %x.param
// CHECK:STDOUT: }
// CHECK:STDOUT: %D.decl.loc44: %D.type = fn_decl @D [concrete = constants.%D] {} {}
// CHECK:STDOUT: %D.decl.loc52: %D.type = fn_decl @D [concrete = constants.%D] {} {}
// CHECK:STDOUT: %E.decl.loc54: %E.type.851869.1 = fn_decl @E.1 [concrete = constants.%E.237d29.1] {} {}
// CHECK:STDOUT: %E.decl.loc62: %E.type.851869.2 = fn_decl @E.2 [concrete = constants.%E.237d29.2] {} {}
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @A();
// CHECK:STDOUT:
// CHECK:STDOUT: fn @B(%x.param.loc24: %empty_tuple.type);
// CHECK:STDOUT:
// CHECK:STDOUT: fn @C.1();
// CHECK:STDOUT:
// CHECK:STDOUT: fn @C.2(%x.param: %empty_tuple.type);
// CHECK:STDOUT:
// CHECK:STDOUT: fn @D() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @E.1() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @E.2() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT:
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