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https://github.com/carbon-language/carbon-lang.git
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Richard Smith
25681901bd
Instead of taking the complete text of the Clang diagnostic and using it as the message portion of a Carbon diagnostic, generate the individual pieces separately and pass them into the Carbon diagnostic infrastructure. * Clang's context lines are generated by running a custom "diagnostic renderer" and tracking which lines it wants to print as context for a given source location. When mapping from a C++ source location back to a Carbon location, the Carbon `Loc` structure is now fully populated, including filling in the context line and the column number. * Clang's snippet is generated by running a custom diagnostic renderer that is a cut-down version of the full text diagnostic renderer that only prints a snippet. This is then attached to the Carbon diagnostic manually as an override for the snippet we'd usually create. We no longer repeat the file location twice on each diagnostic, and no longer produce a bogus "in import" line for all locations coming from clang that point arbitrarily to the first C++ import in the Carbon file. The `[diagnostic kind]` marker is now displayed at the end of the diagnostic message, not on a line of its own after the snippet.
81 lines
3.0 KiB
C++
81 lines
3.0 KiB
C++
// 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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#include <gtest/gtest.h>
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#include "absl/flags/flag.h"
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#include "toolchain/diagnostics/diagnostic_kind.h"
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#include "toolchain/testing/coverage_helper.h"
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ABSL_FLAG(std::string, testdata_manifest, "",
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"A path to a file containing repo-relative names of test files.");
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namespace Carbon::Diagnostics {
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namespace {
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constexpr Kind Kinds[] = {
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#define CARBON_DIAGNOSTIC_KIND(Name) Kind::Name,
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#include "toolchain/diagnostics/diagnostic_kind.def"
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};
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constexpr Kind UntestedKinds[] = {
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// These exist only for unit tests.
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Kind::TestDiagnostic,
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Kind::TestDiagnosticNote,
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// Diagnosing erroneous install conditions, but test environments are
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// typically correct.
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Kind::CompilePreludeManifestError,
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Kind::DriverInstallInvalid,
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// These diagnose filesystem issues that are hard to unit test.
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Kind::ErrorReadingFile,
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Kind::ErrorStattingFile,
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Kind::FileTooLarge,
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// These aren't feasible to test with a normal testcase, but are tested in
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// lex/tokenized_buffer_test.cpp.
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Kind::TooManyTokens,
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Kind::UnsupportedCrLineEnding,
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Kind::UnsupportedLfCrLineEnding,
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// This is a little long but is tested in lex/numeric_literal_test.cpp.
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Kind::TooManyDigits,
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// Producing an emit failure may be infeasible.
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Kind::CodeGenUnableToEmit,
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// TODO: This is currently hard to test because it requires building and
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// importing a module, which attempts to create additional files with
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// unpredictable names in the module cache, which bazel doesn't permit.
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Kind::InCppModule,
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// TODO: This can only fire if the first message in a diagnostic is rooted
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// in a file other than the file being compiled. The language server
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// currently only supports compiling one file at a time. Do one of:
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// - When imports are supported, find a diagnostic whose first message isn't
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// in the current file.
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// - Require all diagnostics produced by compiling have their first location
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// be in the file being compiled, never an import.
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Kind::LanguageServerDiagnosticInWrongFile,
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// TODO: This can only fire if we attempt to convert a non-reference
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// expression to a durable reference binding. At the moment, the only time
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// we attempt reference binding is within a `var` pattern, where the
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// conversion cannot fail. This should be covered once we support `ref`
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// binding syntax.
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Kind::ConversionFailureNonRefToRef,
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};
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// Looks for diagnostic kinds that aren't covered by a file_test.
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TEST(Coverage, Kind) {
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Testing::TestKindCoverage(absl::GetFlag(FLAGS_testdata_manifest),
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R"(^ *// CHECK:STDERR: .* \[(\w+)\]$)",
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llvm::ArrayRef(Kinds),
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llvm::ArrayRef(UntestedKinds));
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}
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} // namespace
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} // namespace Carbon::Diagnostics
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