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carbon-lang/toolchain/check/testdata/function/generic/redeclare.carbon
T
Richard Smith e0b8728263 Allocate de Bruijn levels to symbolic bindings. (#3906) 
Use a level comparison during substitution to determine whether we're
substituting a particular binding. Evaluate symbolic bindings with the
same name and the same level to the same symbolic constant, for example
across redeclarations of a generic function.
2024-04-23 16:15:47 +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
//
// AUTOUPDATE
// --- redeclare.carbon
library "redeclare" api;
fn F(T:! type) -> T*;
fn F(T:! type) -> T* {
return F(T);
}
// --- fail_different_return_type.carbon
library "fail_different_return_type" api;
fn F(T:! type, U:! type) -> T*;
// CHECK:STDERR: fail_different_return_type.carbon:[[@LINE+7]]:1: ERROR: Function redeclaration differs because return type is `U*`.
// CHECK:STDERR: fn F(T:! type, U:! type) -> U* {
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// CHECK:STDERR: fail_different_return_type.carbon:[[@LINE-5]]:1: Previously declared with return type `T*`.
// CHECK:STDERR: fn F(T:! type, U:! type) -> T*;
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// CHECK:STDERR:
fn F(T:! type, U:! type) -> U* {
// CHECK:STDERR: fail_different_return_type.carbon:[[@LINE+11]]:3: ERROR: Cannot implicitly convert from `T*` to `U*`.
// CHECK:STDERR: return F(T);
// CHECK:STDERR: ^~~~~~~~~~~~
// CHECK:STDERR:
// CHECK:STDERR: fail_different_return_type.carbon:[[@LINE+7]]:10: ERROR: 1 argument(s) passed to function expecting 2 argument(s).
// CHECK:STDERR: return F(T);
// CHECK:STDERR: ^~
// CHECK:STDERR: fail_different_return_type.carbon:[[@LINE-17]]:1: Calling function declared here.
// CHECK:STDERR: fn F(T:! type, U:! type) -> T*;
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// CHECK:STDERR:
return F(T);
}
// --- fail_reorder.carbon
library "fail_reorder" api;
fn F(T:! type, U:! type) -> T*;
// CHECK:STDERR: fail_reorder.carbon:[[@LINE+7]]:6: ERROR: Function redeclaration differs at parameter 1.
// CHECK:STDERR: fn F(U:! type, T:! type) -> T* {
// CHECK:STDERR: ^
// CHECK:STDERR: fail_reorder.carbon:[[@LINE-5]]:6: Previous declaration's corresponding parameter here.
// CHECK:STDERR: fn F(T:! type, U:! type) -> T*;
// CHECK:STDERR: ^
// CHECK:STDERR:
fn F(U:! type, T:! type) -> T* {
// CHECK:STDERR: fail_reorder.carbon:[[@LINE+11]]:3: ERROR: Cannot implicitly convert from `T*` to `T*`.
// CHECK:STDERR: return F(T);
// CHECK:STDERR: ^~~~~~~~~~~~
// CHECK:STDERR:
// CHECK:STDERR: fail_reorder.carbon:[[@LINE+7]]:10: ERROR: 1 argument(s) passed to function expecting 2 argument(s).
// CHECK:STDERR: return F(T);
// CHECK:STDERR: ^~
// CHECK:STDERR: fail_reorder.carbon:[[@LINE-17]]:1: Calling function declared here.
// CHECK:STDERR: fn F(T:! type, U:! type) -> T*;
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// CHECK:STDERR:
return F(T);
}
// --- fail_rename.carbon
library "fail_rename" api;
fn F(T:! type, U:! type) -> T*;
// CHECK:STDERR: fail_rename.carbon:[[@LINE+7]]:6: ERROR: Function redeclaration differs at parameter 1.
// CHECK:STDERR: fn F(U:! type, T:! type) -> U* {
// CHECK:STDERR: ^
// CHECK:STDERR: fail_rename.carbon:[[@LINE-5]]:6: Previous declaration's corresponding parameter here.
// CHECK:STDERR: fn F(T:! type, U:! type) -> T*;
// CHECK:STDERR: ^
// CHECK:STDERR:
fn F(U:! type, T:! type) -> U* {
// CHECK:STDERR: fail_rename.carbon:[[@LINE+10]]:3: ERROR: Cannot implicitly convert from `T*` to `U*`.
// CHECK:STDERR: return F(T);
// CHECK:STDERR: ^~~~~~~~~~~~
// CHECK:STDERR:
// CHECK:STDERR: fail_rename.carbon:[[@LINE+6]]:10: ERROR: 1 argument(s) passed to function expecting 2 argument(s).
// CHECK:STDERR: return F(T);
// CHECK:STDERR: ^~
// CHECK:STDERR: fail_rename.carbon:[[@LINE-17]]:1: Calling function declared here.
// CHECK:STDERR: fn F(T:! type, U:! type) -> T*;
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
return F(T);
}
// CHECK:STDOUT: --- redeclare.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %T: type = bind_symbolic_name T 0 [symbolic]
// CHECK:STDOUT: %.1: type = ptr_type T [symbolic]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [template] {
// CHECK:STDOUT: .Core = %Core
// CHECK:STDOUT: .F = %F.loc4
// CHECK:STDOUT: }
// CHECK:STDOUT: %Core: <namespace> = namespace [template] {}
// CHECK:STDOUT: %F.loc4: <function> = fn_decl @F [template] {
// CHECK:STDOUT: %T.loc4_6.1: type = param T
// CHECK:STDOUT: %T.loc4_6.2: type = bind_symbolic_name T 0, %T.loc4_6.1 [symbolic = constants.%T]
// CHECK:STDOUT: %T.ref.loc4: type = name_ref T, %T.loc4_6.2 [symbolic = constants.%T]
// CHECK:STDOUT: %.loc4: type = ptr_type T [symbolic = constants.%.1]
// CHECK:STDOUT: %return.var.loc4: ref T* = var <return slot>
// CHECK:STDOUT: }
// CHECK:STDOUT: %F.loc6: <function> = fn_decl @F [template] {
// CHECK:STDOUT: %T.loc6_6.1: type = param T
// CHECK:STDOUT: @F.%T: type = bind_symbolic_name T 0, %T.loc6_6.1 [symbolic = constants.%T]
// CHECK:STDOUT: %T.ref.loc6: type = name_ref T, @F.%T [symbolic = constants.%T]
// CHECK:STDOUT: %.loc6: type = ptr_type T [symbolic = constants.%.1]
// CHECK:STDOUT: @F.%return: ref T* = var <return slot>
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @F(%T: type) -> T* {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %F.ref: <function> = name_ref F, file.%F.loc4 [template = file.%F.loc4]
// CHECK:STDOUT: %T.ref: type = name_ref T, %T [symbolic = constants.%T]
// CHECK:STDOUT: %F.call: init T* = call %F.ref(%T.ref)
// CHECK:STDOUT: %.loc7_14.1: T* = value_of_initializer %F.call
// CHECK:STDOUT: %.loc7_14.2: T* = converted %F.call, %.loc7_14.1
// CHECK:STDOUT: return %.loc7_14.2
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_different_return_type.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %T: type = bind_symbolic_name T 0 [symbolic]
// CHECK:STDOUT: %U: type = bind_symbolic_name U 1 [symbolic]
// CHECK:STDOUT: %.1: type = ptr_type T [symbolic]
// CHECK:STDOUT: %.2: type = ptr_type U [symbolic]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [template] {
// CHECK:STDOUT: .Core = %Core
// CHECK:STDOUT: .F = %F
// CHECK:STDOUT: }
// CHECK:STDOUT: %Core: <namespace> = namespace [template] {}
// CHECK:STDOUT: %F: <function> = fn_decl @F [template] {
// CHECK:STDOUT: %T.loc4_6.1: type = param T
// CHECK:STDOUT: @F.%T: type = bind_symbolic_name T 0, %T.loc4_6.1 [symbolic = constants.%T]
// CHECK:STDOUT: %U.loc4_16.1: type = param U
// CHECK:STDOUT: @F.%U: type = bind_symbolic_name U 1, %U.loc4_16.1 [symbolic = constants.%U]
// CHECK:STDOUT: %T.ref: type = name_ref T, @F.%T [symbolic = constants.%T]
// CHECK:STDOUT: %.loc4: type = ptr_type T [symbolic = constants.%.1]
// CHECK:STDOUT: @F.%return: ref T* = var <return slot>
// CHECK:STDOUT: }
// CHECK:STDOUT: %.loc13_32: <function> = fn_decl @.1 [template] {
// CHECK:STDOUT: %T.loc13_6.1: type = param T
// CHECK:STDOUT: @.1.%T: type = bind_symbolic_name T 0, %T.loc13_6.1 [symbolic = constants.%T]
// CHECK:STDOUT: %U.loc13_16.1: type = param U
// CHECK:STDOUT: @.1.%U: type = bind_symbolic_name U 1, %U.loc13_16.1 [symbolic = constants.%U]
// CHECK:STDOUT: %U.ref: type = name_ref U, @.1.%U [symbolic = constants.%U]
// CHECK:STDOUT: %.loc13_30: type = ptr_type U [symbolic = constants.%.2]
// CHECK:STDOUT: @.1.%return: ref U* = var <return slot>
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @F(%T: type, %U: type) -> T*;
// CHECK:STDOUT:
// CHECK:STDOUT: fn @.1(%T: type, %U: type) -> U* {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %F.ref: <function> = name_ref F, file.%F [template = file.%F]
// CHECK:STDOUT: %T.ref: type = name_ref T, %T [symbolic = constants.%T]
// CHECK:STDOUT: %F.call: init T* = call %F.ref(<invalid>) [template = <error>]
// CHECK:STDOUT: return <error>
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_reorder.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %T.1: type = bind_symbolic_name T 0 [symbolic]
// CHECK:STDOUT: %U.1: type = bind_symbolic_name U 1 [symbolic]
// CHECK:STDOUT: %.1: type = ptr_type T [symbolic]
// CHECK:STDOUT: %U.2: type = bind_symbolic_name U 0 [symbolic]
// CHECK:STDOUT: %T.2: type = bind_symbolic_name T 1 [symbolic]
// CHECK:STDOUT: %.2: type = ptr_type T [symbolic]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [template] {
// CHECK:STDOUT: .Core = %Core
// CHECK:STDOUT: .F = %F
// CHECK:STDOUT: }
// CHECK:STDOUT: %Core: <namespace> = namespace [template] {}
// CHECK:STDOUT: %F: <function> = fn_decl @F [template] {
// CHECK:STDOUT: %T.loc4_6.1: type = param T
// CHECK:STDOUT: @F.%T: type = bind_symbolic_name T 0, %T.loc4_6.1 [symbolic = constants.%T.1]
// CHECK:STDOUT: %U.loc4_16.1: type = param U
// CHECK:STDOUT: @F.%U: type = bind_symbolic_name U 1, %U.loc4_16.1 [symbolic = constants.%U.1]
// CHECK:STDOUT: %T.ref.loc4: type = name_ref T, @F.%T [symbolic = constants.%T.1]
// CHECK:STDOUT: %.loc4: type = ptr_type T [symbolic = constants.%.1]
// CHECK:STDOUT: @F.%return: ref T* = var <return slot>
// CHECK:STDOUT: }
// CHECK:STDOUT: %.loc13_32: <function> = fn_decl @.1 [template] {
// CHECK:STDOUT: %U.loc13_6.1: type = param U
// CHECK:STDOUT: @.1.%U: type = bind_symbolic_name U 0, %U.loc13_6.1 [symbolic = constants.%U.2]
// CHECK:STDOUT: %T.loc13_16.1: type = param T
// CHECK:STDOUT: @.1.%T: type = bind_symbolic_name T 1, %T.loc13_16.1 [symbolic = constants.%T.2]
// CHECK:STDOUT: %T.ref.loc13: type = name_ref T, @.1.%T [symbolic = constants.%T.2]
// CHECK:STDOUT: %.loc13_30: type = ptr_type T [symbolic = constants.%.2]
// CHECK:STDOUT: @.1.%return: ref T* = var <return slot>
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @F(%T: type, %U: type) -> T*;
// CHECK:STDOUT:
// CHECK:STDOUT: fn @.1(%U: type, %T: type) -> T* {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %F.ref: <function> = name_ref F, file.%F [template = file.%F]
// CHECK:STDOUT: %T.ref: type = name_ref T, %T [symbolic = constants.%T.2]
// CHECK:STDOUT: %F.call: init T* = call %F.ref(<invalid>) [template = <error>]
// CHECK:STDOUT: return <error>
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_rename.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %T.1: type = bind_symbolic_name T 0 [symbolic]
// CHECK:STDOUT: %U.1: type = bind_symbolic_name U 1 [symbolic]
// CHECK:STDOUT: %.1: type = ptr_type T [symbolic]
// CHECK:STDOUT: %U.2: type = bind_symbolic_name U 0 [symbolic]
// CHECK:STDOUT: %T.2: type = bind_symbolic_name T 1 [symbolic]
// CHECK:STDOUT: %.2: type = ptr_type U [symbolic]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [template] {
// CHECK:STDOUT: .Core = %Core
// CHECK:STDOUT: .F = %F
// CHECK:STDOUT: }
// CHECK:STDOUT: %Core: <namespace> = namespace [template] {}
// CHECK:STDOUT: %F: <function> = fn_decl @F [template] {
// CHECK:STDOUT: %T.loc4_6.1: type = param T
// CHECK:STDOUT: @F.%T: type = bind_symbolic_name T 0, %T.loc4_6.1 [symbolic = constants.%T.1]
// CHECK:STDOUT: %U.loc4_16.1: type = param U
// CHECK:STDOUT: @F.%U: type = bind_symbolic_name U 1, %U.loc4_16.1 [symbolic = constants.%U.1]
// CHECK:STDOUT: %T.ref: type = name_ref T, @F.%T [symbolic = constants.%T.1]
// CHECK:STDOUT: %.loc4: type = ptr_type T [symbolic = constants.%.1]
// CHECK:STDOUT: @F.%return: ref T* = var <return slot>
// CHECK:STDOUT: }
// CHECK:STDOUT: %.loc13_32: <function> = fn_decl @.1 [template] {
// CHECK:STDOUT: %U.loc13_6.1: type = param U
// CHECK:STDOUT: @.1.%U: type = bind_symbolic_name U 0, %U.loc13_6.1 [symbolic = constants.%U.2]
// CHECK:STDOUT: %T.loc13_16.1: type = param T
// CHECK:STDOUT: @.1.%T: type = bind_symbolic_name T 1, %T.loc13_16.1 [symbolic = constants.%T.2]
// CHECK:STDOUT: %U.ref: type = name_ref U, @.1.%U [symbolic = constants.%U.2]
// CHECK:STDOUT: %.loc13_30: type = ptr_type U [symbolic = constants.%.2]
// CHECK:STDOUT: @.1.%return: ref U* = var <return slot>
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @F(%T: type, %U: type) -> T*;
// CHECK:STDOUT:
// CHECK:STDOUT: fn @.1(%U: type, %T: type) -> U* {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %F.ref: <function> = name_ref F, file.%F [template = file.%F]
// CHECK:STDOUT: %T.ref: type = name_ref T, %T [symbolic = constants.%T.2]
// CHECK:STDOUT: %F.call: init T* = call %F.ref(<invalid>) [template = <error>]
// CHECK:STDOUT: return <error>
// CHECK:STDOUT: }
// CHECK:STDOUT:
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