[Macros] Centralize "unwrapping" of errors into diagnostics #1471
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We had a few different implementations of "take an error thrown from a macro and turn it into diagnostics". Improve the implementation in `MacroExpansionContext.addDiagnostics` to properly handle both `DiagnosticsError` and `DiagnosticsMessage`, as well as fall back gracefully if either of those is missing an error diagnostic. Then, use that implementation for the compiler plugin message handler. Another part of fixing rdar://107289985, where diagnostics provided by throwing `DiagnosticsError` aren't coming through well.
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@swift-ci please test |
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We had a few different implementations of "take an error thrown from a
macro and turn it into diagnostics". Improve the implementation in
MacroExpansionContext.addDiagnosticsto properly handle bothDiagnosticsErrorandDiagnosticsMessage, as well as fall backgracefully if either of those is missing an error diagnostic. Then,
use that implementation for the compiler plugin message handler.
Another part of fixing rdar://107289985, where diagnostics provided by
throwing
DiagnosticsErroraren't coming through well.