Argyrios Kyrtzidis 374bf23f2b [TypeChecker] Introduce frontend option '-debug-forbid-typecheck-prefix' to protect against unnecessary typechecking, ...

for testing purposes.

When enabled, if the typechecker tries to typecheck a decl or unresolved identifier with the provided
prefix, then an llvm fatal_error will get triggered.

This approach has the advantage that it is very easy to write tests for unnecessary typechecking for a wide range of functionality,
for the compiler or SourceKit, for code-completion, indexing, etc.

Swift SVN r22003

2014-09-17 04:17:49 +00:00

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