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[ConstraintSystem] Change missingArgument callback to produce an index of synthesized argument

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In diagnostic mode allow argument matcher to synthesize new
arguments, which makes it much easier to diagnose problems
related to missing arguments.
This commit is contained in:
Pavel Yaskevich
2019-09-18 16:49:58 -07:00
parent 4203c2f9f3
commit b15ef15a60
4 changed files with 9 additions and 4 deletions
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5
lib/Sema/CSSimplify.cpp
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@@ -36,7 +36,10 @@ MatchCallArgumentListener::~MatchCallArgumentListener() { }
void MatchCallArgumentListener::extraArgument(unsigned argIdx) { }
void MatchCallArgumentListener::missingArgument(unsigned paramIdx) { }
Optional<unsigned>
MatchCallArgumentListener::missingArgument(unsigned paramIdx) {
return None;
}
bool MatchCallArgumentListener::missingLabel(unsigned paramIdx) { return true; }
bool MatchCallArgumentListener::extraneousLabel(unsigned paramIdx) {