mirror of
https://github.com/carbon-language/carbon-lang.git
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Richard SmithandGeoff Romer
ce50f181f1
When a `var` is not explicitly given an initializer, initialize it in one of two ways: * If its type implements the new interface `Core.Default`, call `Core.Default.Op` to initialize it. * Otherwise, if its type implements `UnformedInit`, leave it in an unformed state. For now, this is always an uninitialized state, but that will change in the future. * If neither of those apply, the `var` declaration is ill-formed. This is a step towards implementing leads decision #6739 and proposals #257 and #5913. Assisted-by: Gemini 3.1 Pro via Antigravity --------- Co-authored-by: Geoff Romer <gromer@google.com>
112 lines
3.8 KiB
Plaintext
112 lines
3.8 KiB
Plaintext
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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// Exceptions. See /LICENSE for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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// INCLUDE-FILE: toolchain/testing/testdata/min_prelude/int.carbon
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//
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// AUTOUPDATE
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// TIP: To test this file alone, run:
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// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/check/testdata/eval/call.carbon
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// TIP: To dump output, run:
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// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/eval/call.carbon
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// --- call.carbon
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library "[[@TEST_NAME]]";
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eval fn F() -> i32 { return 3; }
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var a: array(i32, F()) = (0, 1, 2);
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// --- fail_call_wrong_value.carbon
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library "[[@TEST_NAME]]";
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eval fn F() -> i32 { return 3; }
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// Ensure we get an error about the over-sized initializer and aren't just
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// treating all `eval fn` calls as silent errors.
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// CHECK:STDERR: fail_call_wrong_value.carbon:[[@LINE+4]]:26: error: cannot initialize array of 3 elements from 4 initializers [ArrayInitFromLiteralArgCountMismatch]
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// CHECK:STDERR: var a: array(i32, F()) = (0, 1, 2, 3);
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// CHECK:STDERR: ^~~~~~~~~~~~
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// CHECK:STDERR:
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var a: array(i32, F()) = (0, 1, 2, 3);
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// --- fail_call_fn_not_eval.carbon
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library "[[@TEST_NAME]]";
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fn F() -> i32 { return 3; }
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// CHECK:STDERR: fail_call_fn_not_eval.carbon:[[@LINE+4]]:19: error: array bound is not a constant [InvalidArrayExpr]
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// CHECK:STDERR: var a: array(i32, F()) = (0, 1, 2);
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// CHECK:STDERR: ^~~
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// CHECK:STDERR:
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var a: array(i32, F()) = (0, 1, 2);
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// --- fail_call_eval_fn_not_defined.carbon
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library "[[@TEST_NAME]]";
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eval fn F() -> i32;
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// TODO: We should be able to diagnose this better.
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// CHECK:STDERR: fail_call_eval_fn_not_defined.carbon:[[@LINE+4]]:19: error: array bound is not a constant [InvalidArrayExpr]
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// CHECK:STDERR: var a: array(i32, F()) = (0, 1, 2);
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// CHECK:STDERR: ^~~
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// CHECK:STDERR:
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var a: array(i32, F()) = (0, 1, 2);
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// --- param_and_return.carbon
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library "[[@TEST_NAME]]";
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eval fn F(x: i32) -> i32 { return x; }
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var a: array(i32, F(3)) = (1, 2, 3);
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// --- fail_todo_dependent_call.carbon
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library "[[@TEST_NAME]]";
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eval fn F(x: i32) -> i32 { return x; }
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fn G(N:! i32) {
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// CHECK:STDERR: fail_todo_dependent_call.carbon:[[@LINE+4]]:17: error: cannot evaluate type expression [TypeExprEvaluationFailure]
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// CHECK:STDERR: var unused a: array(i32, F(N)) = (0, 1, 2);
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// CHECK:STDERR: ^~~~~~~~~~~~~~~~
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// CHECK:STDERR:
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var unused a: array(i32, F(N)) = (0, 1, 2);
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}
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fn H() { G(3); }
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// --- fail_todo_dependent_call_type.carbon
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library "[[@TEST_NAME]]";
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class C {}
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eval fn F(_: i32) -> type {
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return C;
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}
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fn UseFGenerically(X:! i32) {
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// 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]
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// CHECK:STDERR: var unused v: F(X) = {};
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// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~
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// CHECK:STDERR:
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// CHECK:STDERR: fail_todo_dependent_call_type.carbon:[[@LINE+8]]:3: error: value of type `<dependent type>` is not callable [CallToNonCallable]
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// CHECK:STDERR: var unused v: F(X) = {};
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// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~
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// CHECK:STDERR:
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// 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]
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// CHECK:STDERR: var unused v: F(X) = {};
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// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~
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// CHECK:STDERR:
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var unused v: F(X) = {};
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}
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fn UseFSpecifically() {
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UseFGenerically(3);
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}
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