Slava Pestov 39a22f3d6a AST: Remove ParameterTypeFlags::Escaping ...

Escapingness is a property of the type of a value, not a property of a function
parameter. Having it as a separate parameter flag just meant one more piece of
state that could get out of sync and cause weird problems.

Instead, always look at the noescape bit in a function type as the canonical
source of truth.

This does mean that '@escaping' is now printed in a few diagnostics where it was
not printed before; we can investigate these as separate issues, but it is
correct to print it there because the function types in question are, in fact,
escaping.

Fixes <https://bugs.swift.org/browse/SR-10256>, <rdar://problem/49522774>.

2019-04-15 00:25:03 -04:00

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