Mark Lacey 9385dbb3fb Fix exponential type checking of tuple literals. ...

This fixes two easy cases where we would go exponential in type
checking tuple literals.

Instead of generating a conversion to a single type variable (which
results in one large constraint system), we generate a conversion ot
the same type that appears in the initializer expression (which for
tuples is a tuple type, which naturally splits the constraint system).

I experimented with trying to generalize this further, but ran into
problems getting it working, so for now this will have to do.

Fixes rdar://problem/20233198.

2018-03-26 14:46:03 -07:00

9.6 KiB

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