CollectingDiagnosticHandler.handleDiagnostic

Undocumented in source. Be warned that the author may not have intended to support it.
struct CollectingDiagnosticHandler
pure nothrow
void
handleDiagnostic
(
const ref Loc loc
,,
scope const char* messageFormat
,
va_list args
,
bool isSupplemental = false
)

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