Make {hsExpr,hsType,pat}NeedsParens aware of boxed 1-tuples
hsExprNeedsParens
, hsTypeNeedsParens
, and patNeedsParens
previously assumed that all uses of explicit tuples in the source
syntax never need to be parenthesized. This is true save for one
exception: boxed one-tuples, which use the Solo
data type from
GHC.Tuple
instead of special tuple syntax. This patch adds the
necessary logic to the three *NeedsParens
functions to handle
Solo
correctly.
Fixes #18612 (closed).