Files
carbon-lang/toolchain/check/testdata/interface/require_invalid_modifiers.carbon
T
Chandler Carruth 2c9739799b Render diagnostics through the terminal library (#7683)
Diagnostic rendering was part of the data model: `Loc::FormatLocation`
and
`Loc::FormatSnippet` wrote plain text to a stream, so no capability,
color, or
terminal width could reach them.

A diagnostic is now one message with labels, contexts, and location
information
attached, and `Diagnostics::Renderer` draws it into a
`Terminal::Buffer`. The
design is in `toolchain/docs/diagnostics_rendering.md` (#7668),
authoring in
`toolchain/docs/diagnostics.md`.

Before:

```
example.carbon:6:3: error: 1 argument passed to function expecting 0 arguments
  Run0(1);
  ^~~~~~~
example.carbon:3:1: note: calling function declared here
fn Run0() {}
^~~~~~~~~~~
```

After:

```
error: 1 argument passed to function expecting 0 arguments
       ╭─┤ example.carbon:6:3
       ┆
     3 │ fn Run0() {}
       · ─────┬─────
       ·      ╰──┤ calling function declared here
       ┆
->   6 │   Run0(1);
       ·   ───────
       ╰────────────
```

`--no-diagnostic-snippets` gives a compact form, `example.carbon:6:3-9`.
File
tests use it; the rendering tests under `toolchain/diagnostics/testdata`
ask for
snippets.

C++ interop diagnostics are data now rather than text Clang drew:
`SemIR::ClangSourceLocId` names a `clang::SourceRange`, and a Clang
location is
marked as the point it names.

`StreamConsumer` moves to a `:renderer` target that `:emitter` does not
depend
on, keeping `common/terminal` out of `consumer.h`. Capabilities come
from the
file behind the error stream, so tests get plain ASCII.

`renderer_fuzzer` draws diagnostics built from fuzzer bytes with every
capability combination, since a shape the renderer doesn't expect must
never be
why the compiler dies while reporting a problem.

TODOs mark the follow-ups: line weights and crossing lines, wrapping
that keeps
a quoted type whole, and ordering diagnostics that share a byte offset.

Also: `IncorrectExtension`'s hint moves into its message, since its note
had no
location of its own, and `strip_noise` in `check_diagnostics.py` blanks
multi-line `#define`s instead of deleting them.

Assisted-by: Claude Code
2026-10-15 06:08:57 +00:00

135 lines
3.9 KiB
Plaintext

// 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/none.carbon
//
// AUTOUPDATE
// TIP: To test this file alone, run:
// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/check/testdata/interface/require_invalid_modifiers.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/interface/require_invalid_modifiers.carbon
// --- fail_abstract_require.carbon
library "[[@TEST_NAME]]";
interface Y {}
interface Z {
// CHECK:STDERR: fail_abstract_require.carbon:[[@LINE+2]]:3-10: error: `abstract` not allowed on `require` declaration [ModifierNotAllowedOnDeclaration]
// CHECK:STDERR:
abstract require impls Y;
}
// --- fail_base_require.carbon
library "[[@TEST_NAME]]";
interface Y {}
interface Z {
// CHECK:STDERR: fail_base_require.carbon:[[@LINE+2]]:3-6: error: `base` not allowed on `require` declaration [ModifierNotAllowedOnDeclaration]
// CHECK:STDERR:
base require impls Y;
}
// --- fail_default_require.carbon
library "[[@TEST_NAME]]";
interface Y {}
interface Z {
// CHECK:STDERR: fail_default_require.carbon:[[@LINE+2]]:3-9: error: `default` not allowed on `require` declaration [ModifierNotAllowedOnDeclaration]
// CHECK:STDERR:
default require impls Y;
}
// --- fail_extern_require.carbon
library "[[@TEST_NAME]]";
interface Y {}
interface Z {
// CHECK:STDERR: fail_extern_require.carbon:[[@LINE+2]]:3-8: error: `extern` not allowed on `require` declaration [ModifierNotAllowedOnDeclaration]
// CHECK:STDERR:
extern require impls Y;
}
// --- fail_final_require.carbon
library "[[@TEST_NAME]]";
interface Y {}
interface Z {
// CHECK:STDERR: fail_final_require.carbon:[[@LINE+2]]:3-7: error: `final` not allowed on `require` declaration [ModifierNotAllowedOnDeclaration]
// CHECK:STDERR:
final require impls Y;
}
// --- fail_impl_require.carbon
library "[[@TEST_NAME]]";
interface Y {}
interface Z {
// CHECK:STDERR: fail_impl_require.carbon:[[@LINE+2]]:3-6: error: `impl` not allowed on `require` declaration [ModifierNotAllowedOnDeclaration]
// CHECK:STDERR:
impl require impls Y;
}
// --- fail_override_require.carbon
library "[[@TEST_NAME]]";
interface Y {}
interface Z {
// CHECK:STDERR: fail_override_require.carbon:[[@LINE+2]]:3-10: error: `override` not allowed on `require` declaration [ModifierNotAllowedOnDeclaration]
// CHECK:STDERR:
override require impls Y;
}
// --- fail_returned_require.carbon
library "[[@TEST_NAME]]";
interface Y {}
interface Z {
// CHECK:STDERR: fail_returned_require.carbon:[[@LINE+4]]:3-10: error: unrecognized declaration introducer [UnrecognizedDecl]
// CHECK:STDERR:
// CHECK:STDERR: fail_returned_require.carbon:[[@LINE+2]]:3-10: error: semantics TODO: `handle invalid parse trees in `check`` [SemanticsTodo]
// CHECK:STDERR:
returned require impls Y;
}
// --- fail_private_require.carbon
library "[[@TEST_NAME]]";
interface Y {}
interface Z {
// CHECK:STDERR: fail_private_require.carbon:[[@LINE+2]]:3-9: error: `private` not allowed on `require` declaration [ModifierNotAllowedOnDeclaration]
// CHECK:STDERR:
private require impls Y;
}
// --- fail_protected_require.carbon
library "[[@TEST_NAME]]";
interface Y {}
interface Z {
// CHECK:STDERR: fail_protected_require.carbon:[[@LINE+2]]:3-11: error: `protected` not allowed on `require` declaration [ModifierNotAllowedOnDeclaration]
// CHECK:STDERR:
protected require impls Y;
}
// --- fail_override_virtual.carbon
library "[[@TEST_NAME]]";
interface Y {}
interface Z {
// CHECK:STDERR: fail_override_virtual.carbon:[[@LINE+2]]:3-9: error: `virtual` not allowed on `require` declaration [ModifierNotAllowedOnDeclaration]
// CHECK:STDERR:
virtual require impls Y;
}