mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-10-05 09:41:08 +01:00
Jon Ross-Perkins
45ca3d28f5
Mainly because "sorting_diagnostic_consumer" is legacy, since `SortingDiagnosticConsumer` became `SortingConsumer`. Also better reflecting contents of these files. Where I'm not renaming, I'm less positive about dropping "diagnostics" from "file_diagnostics" and "null_diagnostics" (which contain both a consumer and emitter, and "null.h" seems like poor naming), so not doing that here. Also "diagnostic.h" contains `struct Diagnostic`, so is a decent fit. Assisted-by: Google Antigravity with Gemini 3 Flash
61 lines
2.2 KiB
C++
61 lines
2.2 KiB
C++
// 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
|
|
|
|
#ifndef CARBON_TOOLCHAIN_LEX_TEST_HELPERS_H_
|
|
#define CARBON_TOOLCHAIN_LEX_TEST_HELPERS_H_
|
|
|
|
#include <gmock/gmock.h>
|
|
|
|
#include <array>
|
|
|
|
#include "common/check.h"
|
|
#include "common/string_helpers.h"
|
|
#include "toolchain/diagnostics/emitter.h"
|
|
|
|
namespace Carbon::Testing {
|
|
|
|
// A diagnostic converter for tests that lex a single token. Produces
|
|
// locations such as "`12.5`:1:3" to refer to the third character in the token.
|
|
class SingleTokenDiagnosticEmitter : public Diagnostics::Emitter<const char*> {
|
|
public:
|
|
// Form a converter for a given token. The string provided here must refer
|
|
// to the same character array that we are going to lex.
|
|
explicit SingleTokenDiagnosticEmitter(Diagnostics::Consumer* consumer,
|
|
llvm::StringRef token)
|
|
: Emitter(consumer), token_(token) {}
|
|
|
|
protected:
|
|
// Implements `DiagnosticConverter::ConvertLoc`.
|
|
auto ConvertLoc(const char* pos, ContextFnT /*context_fn*/) const
|
|
-> Diagnostics::ConvertedLoc override {
|
|
CARBON_CHECK(StringRefContainsPointer(token_, pos),
|
|
"invalid diagnostic location");
|
|
llvm::StringRef prefix = token_.take_front(pos - token_.begin());
|
|
auto [before_last_newline, this_line] = prefix.rsplit('\n');
|
|
if (before_last_newline.size() == prefix.size()) {
|
|
// On first line.
|
|
return {.loc = {.line_number = 1,
|
|
.column_number =
|
|
static_cast<int32_t>(pos - token_.begin() + 1)},
|
|
.last_byte_offset = -1};
|
|
} else {
|
|
// On second or subsequent lines. Note that the line number here is 2
|
|
// more than the number of newlines because `rsplit` removed one newline
|
|
// and `line_number` is 1-based.
|
|
return {
|
|
.loc = {.line_number =
|
|
static_cast<int32_t>(before_last_newline.count('\n') + 2),
|
|
.column_number = static_cast<int32_t>(this_line.size() + 1)},
|
|
.last_byte_offset = -1};
|
|
}
|
|
}
|
|
|
|
private:
|
|
llvm::StringRef token_;
|
|
};
|
|
|
|
} // namespace Carbon::Testing
|
|
|
|
#endif // CARBON_TOOLCHAIN_LEX_TEST_HELPERS_H_
|