carbon-lang/toolchain/check/testdata/eval/call.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
//
// 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/eval/call.carbon
// TIP: To dump output, run:
// TIP:   bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/eval/call.carbon

// --- call.carbon

library "[[@TEST_NAME]]";

eval fn F() -> i32 { return 3; }

var a: array(i32, F()) = (0, 1, 2);

// --- fail_call_wrong_value.carbon

library "[[@TEST_NAME]]";

eval fn F() -> i32 { return 3; }

// Ensure we get an error about the over-sized initializer and aren't just
// treating all `eval fn` calls as silent errors.
// CHECK:STDERR: fail_call_wrong_value.carbon:[[@LINE+4]]:26: error: cannot initialize array of 3 elements from 4 initializers [ArrayInitFromLiteralArgCountMismatch]
// CHECK:STDERR: var a: array(i32, F()) = (0, 1, 2, 3);
// CHECK:STDERR:                          ^~~~~~~~~~~~
// CHECK:STDERR:
var a: array(i32, F()) = (0, 1, 2, 3);

// --- fail_call_fn_not_eval.carbon

library "[[@TEST_NAME]]";

fn F() -> i32 { return 3; }

// CHECK:STDERR: fail_call_fn_not_eval.carbon:[[@LINE+4]]:19: error: array bound is not a constant [InvalidArrayExpr]
// CHECK:STDERR: var a: array(i32, F()) = (0, 1, 2);
// CHECK:STDERR:                   ^~~
// CHECK:STDERR:
var a: array(i32, F()) = (0, 1, 2);

// --- fail_call_eval_fn_not_defined.carbon

library "[[@TEST_NAME]]";

eval fn F() -> i32;

// TODO: We should be able to diagnose this better.
// CHECK:STDERR: fail_call_eval_fn_not_defined.carbon:[[@LINE+4]]:19: error: array bound is not a constant [InvalidArrayExpr]
// CHECK:STDERR: var a: array(i32, F()) = (0, 1, 2);
// CHECK:STDERR:                   ^~~
// CHECK:STDERR:
var a: array(i32, F()) = (0, 1, 2);

// --- param_and_return.carbon

library "[[@TEST_NAME]]";

eval fn F(x: i32) -> i32 { return x; }

var a: array(i32, F(3)) = (1, 2, 3);

// --- fail_todo_dependent_call.carbon

library "[[@TEST_NAME]]";

eval fn F(x: i32) -> i32 { return x; }

fn G(N:! i32) {
  // CHECK:STDERR: fail_todo_dependent_call.carbon:[[@LINE+4]]:17: error: cannot evaluate type expression [TypeExprEvaluationFailure]
  // CHECK:STDERR:   var unused a: array(i32, F(N)) = (0, 1, 2);
  // CHECK:STDERR:                 ^~~~~~~~~~~~~~~~
  // CHECK:STDERR:
  var unused a: array(i32, F(N)) = (0, 1, 2);
}

fn H() { G(3); }

// --- fail_todo_dependent_call_type.carbon

library "[[@TEST_NAME]]";

class C {}
eval fn F(_: i32) -> type {
  return C;
}

fn UseFGenerically(X:! i32) {
  // CHECK:STDERR: fail_todo_dependent_call_type.carbon:[[@LINE+12]]:3: error: member name of type `<dependent type>` in compound member access is not an instance member or an interface member [CompoundMemberAccessDoesNotUseBase]
  // CHECK:STDERR:   var unused v: F(X) = {};
  // CHECK:STDERR:   ^~~~~~~~~~~~~~~~~~
  // CHECK:STDERR:
  // CHECK:STDERR: fail_todo_dependent_call_type.carbon:[[@LINE+8]]:3: error: value of type `<dependent type>` is not callable [CallToNonCallable]
  // CHECK:STDERR:   var unused v: F(X) = {};
  // CHECK:STDERR:   ^~~~~~~~~~~~~~~~~~
  // CHECK:STDERR:
  // CHECK:STDERR: fail_todo_dependent_call_type.carbon:[[@LINE+4]]:3: error: cannot access member of interface `Core.Destroy` in type `<cannot stringify inst7C00018B: {kind: Call, arg0: inst7C00003E, arg1: inst_block7C000091, type: type(TypeType)}>` that does not implement that interface [MissingImplInMemberAccess]
  // CHECK:STDERR:   var unused v: F(X) = {};
  // CHECK:STDERR:   ^~~~~~~~~~~~~~~~~~
  // CHECK:STDERR:
  var unused v: F(X) = {};
}

fn UseFSpecifically() {
  UseFGenerically(3);
}