Doug Gregor 49b05cec84 [Typed throws] Make try? and try! into catch nodes ...

Both `try?` and `try!` are catch nodes, because they catch an error
thrown in their subexpression and handle it. Introduce an ASTScope for
all `try/try?/try1` expressions so we can find them, and model them as
catch nodes.

Fixes rdar://119216455.

2023-12-06 15:00:58 -08:00

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