carbon-lang/toolchain/check/testdata/index/fail_empty_tuple_access.carbon

// 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

fn F() {}

fn Run() {
  // CHECK:STDERR: fail_empty_tuple_access.carbon:[[@LINE+3]]:3: ERROR: Tuple element index `0` is past the end of type `()`.
  // CHECK:STDERR:   F()[0];
  // CHECK:STDERR:   ^~~~~~
  F()[0];
}

// CHECK:STDOUT: --- fail_empty_tuple_access.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT:   %F: type = fn_type @F [template]
// CHECK:STDOUT:   %.1: type = tuple_type () [template]
// CHECK:STDOUT:   %struct.1: F = struct_value () [template]
// CHECK:STDOUT:   %Run: type = fn_type @Run [template]
// CHECK:STDOUT:   %struct.2: Run = struct_value () [template]
// CHECK:STDOUT:   %.2: i32 = int_literal 0 [template]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT:   package: <namespace> = namespace [template] {
// CHECK:STDOUT:     .Core = %Core
// CHECK:STDOUT:     .F = %F.decl
// CHECK:STDOUT:     .Run = %Run.decl
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Core: <namespace> = namespace [template] {}
// CHECK:STDOUT:   %F.decl: F = fn_decl @F [template = constants.%struct.1] {}
// CHECK:STDOUT:   %Run.decl: Run = fn_decl @Run [template = constants.%struct.2] {}
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @F() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Run() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   %F.ref: F = name_ref F, file.%F.decl [template = constants.%struct.1]
// CHECK:STDOUT:   %F.call: init () = call %F.ref()
// CHECK:STDOUT:   %.loc13_7: i32 = int_literal 0 [template = constants.%.2]
// CHECK:STDOUT:   %.loc13_4.1: ref () = temporary_storage
// CHECK:STDOUT:   %.loc13_4.2: ref () = temporary %.loc13_4.1, %F.call
// CHECK:STDOUT:   %.loc13_8: ref <error> = tuple_index %.loc13_4.2, <error>
// CHECK:STDOUT:   return
// CHECK:STDOUT: }
// CHECK:STDOUT: