mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-09-25 16:30:13 +01:00
Jon Meow
b87747306f
Breaks `--trace` into two flags: - `--parser_debug`, which sets the parser debug level (which I haven't dug into piping with `--trace`, but seemed likely to be troublesome) - `--trace_file`, which now the type checker and interpreter will use for trace information (note compile errors should use a different channel) Most of the file edits are just mechanical testdata flag updates: `sed -i 's/--trace/--parser_debug --trace_file=-/' testdata/**/*.carbon` To explain the output paths: - parse/compile errors: stderr - print() calls: stdout - parser tracing: `--parser_debug` option, stdout (formerly stdout if `--trace`) - type check/compile tracing: `--trace_file=<file>`, giving `-` uses stdout (formerly stdout if `--trace`) - return code of executed Carbon code: `--trace_file` if set, stdout if not (formerly stdout always)
90 lines
2.8 KiB
C++
90 lines
2.8 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
|
|
|
|
#include "executable_semantics/syntax/parse.h"
|
|
|
|
#include "common/check.h"
|
|
#include "common/error.h"
|
|
#include "executable_semantics/common/error_builders.h"
|
|
#include "executable_semantics/syntax/lexer.h"
|
|
#include "executable_semantics/syntax/parse_and_lex_context.h"
|
|
#include "executable_semantics/syntax/parser.h"
|
|
#include "llvm/Support/Error.h"
|
|
|
|
namespace Carbon {
|
|
|
|
static auto ParseImpl(yyscan_t scanner, Nonnull<Arena*> arena,
|
|
std::string_view input_file_name, bool parser_debug)
|
|
-> ErrorOr<AST> {
|
|
// Prepare other parser arguments.
|
|
std::optional<AST> ast = std::nullopt;
|
|
ParseAndLexContext context(arena->New<std::string>(input_file_name),
|
|
parser_debug);
|
|
|
|
// Do the parse.
|
|
auto parser = Parser(arena, scanner, context, &ast);
|
|
if (parser_debug) {
|
|
parser.set_debug_level(1);
|
|
}
|
|
|
|
if (auto syntax_error_code = parser(); syntax_error_code != 0) {
|
|
const std::string error_message = context.error_messages().empty()
|
|
? "Unknown parser error"
|
|
: context.error_messages()[0];
|
|
return Error(error_message);
|
|
}
|
|
|
|
// Return parse results.
|
|
CHECK(ast != std::nullopt)
|
|
<< "parser validated syntax yet didn't produce an AST.";
|
|
return *ast;
|
|
}
|
|
|
|
auto Parse(Nonnull<Arena*> arena, std::string_view input_file_name,
|
|
bool parser_debug) -> ErrorOr<AST> {
|
|
std::string name_str(input_file_name);
|
|
FILE* input_file = fopen(name_str.c_str(), "r");
|
|
if (input_file == nullptr) {
|
|
return ProgramError(SourceLocation(name_str.c_str(), 0))
|
|
<< "Error opening file: " << std::strerror(errno);
|
|
}
|
|
|
|
// Prepare the lexer.
|
|
yyscan_t scanner;
|
|
yylex_init(&scanner);
|
|
auto buffer = yy_create_buffer(input_file, YY_BUF_SIZE, scanner);
|
|
yy_switch_to_buffer(buffer, scanner);
|
|
|
|
ErrorOr<AST> result =
|
|
ParseImpl(scanner, arena, input_file_name, parser_debug);
|
|
|
|
// Clean up the lexer.
|
|
yy_delete_buffer(buffer, scanner);
|
|
yylex_destroy(scanner);
|
|
fclose(input_file);
|
|
|
|
return result;
|
|
}
|
|
|
|
auto ParseFromString(Nonnull<Arena*> arena, std::string_view input_file_name,
|
|
std::string_view file_contents, bool parser_debug)
|
|
-> ErrorOr<AST> {
|
|
// Prepare the lexer.
|
|
yyscan_t scanner;
|
|
yylex_init(&scanner);
|
|
auto buffer =
|
|
yy_scan_bytes(file_contents.data(), file_contents.size(), scanner);
|
|
yy_switch_to_buffer(buffer, scanner);
|
|
|
|
ErrorOr<AST> result =
|
|
ParseImpl(scanner, arena, input_file_name, parser_debug);
|
|
|
|
// Clean up the lexer.
|
|
yy_delete_buffer(buffer, scanner);
|
|
yylex_destroy(scanner);
|
|
|
|
return result;
|
|
}
|
|
} // namespace Carbon
|