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Error: track message and prefix/location separately. (#1529)

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This allows us to combine multiple Errors together without repeating the prefix
information. Also fixes several cases where two "COMPILATION ERROR" prefixes
would be prepended to the same message when errors with prefixes and locations
were produced by the lexer and parser.
This commit is contained in:
Richard Smith
2022-07-26 15:08:19 -07:00
committed by GitHub
parent 856a5c4536
commit 7a67715ac5
16 changed files with 177 additions and 52 deletions
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explorer/syntax/prelude.cpp
+2 -2
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@@ -15,8 +15,8 @@ void AddPrelude(std::string_view prelude_file_name, Nonnull<Arena*> arena,
if (!parse_result.ok()) {
// Try again with tracing, to help diagnose the problem.
ErrorOr<AST> trace_parse_result = Parse(arena, prelude_file_name, true);
CARBON_FATAL() << "Failed to parse prelude: "
<< trace_parse_result.error().message();
CARBON_FATAL() << "Failed to parse prelude:\n"
<< trace_parse_result.error();
}
const auto& prelude = *parse_result;
declarations->insert(declarations->begin(), prelude.declarations.begin(),