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Richard SmithandJon Ross-Perkins
ea60e4f491
This will be more correct if a user file is named prelude.carbon, and reduces the explorer runtime by about 10% by removing a string comparison from the check for whether trace output is enabled. --------- Co-authored-by: Jon Ross-Perkins <jperkins@google.com>
31 lines
1.1 KiB
C++
31 lines
1.1 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 "explorer/syntax/prelude.h"
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#include "explorer/syntax/parse.h"
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namespace Carbon {
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// Adds the Carbon prelude to `declarations`.
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void AddPrelude(std::string_view prelude_file_name, Nonnull<Arena*> arena,
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std::vector<Nonnull<Declaration*>>* declarations,
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int* num_prelude_declarations) {
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ErrorOr<AST> parse_result =
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Parse(arena, prelude_file_name, FileKind::Prelude, false);
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if (!parse_result.ok()) {
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// Try again with tracing, to help diagnose the problem.
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ErrorOr<AST> trace_parse_result =
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Parse(arena, prelude_file_name, FileKind::Prelude, true);
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CARBON_FATAL() << "Failed to parse prelude:\n"
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<< trace_parse_result.error();
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}
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const auto& prelude = *parse_result;
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declarations->insert(declarations->begin(), prelude.declarations.begin(),
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prelude.declarations.end());
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*num_prelude_declarations = prelude.declarations.size();
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}
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} // namespace Carbon
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