Huon Wilson 9d13361964 [AST] Introduce a minimal SubstitutionMap dump for use inside expressions. ...

Within a dump of a DeclRef (or, more likely, a larger entity that includes one),
the full multiline details of a substitution map are likely to not be hugely
relevant, and just get in the way of understanding the interesting parts of the
dump. Thus, this is a variant that is a single line and just includes the
substitutions; the conformances (or, at least, the protocols involved) can be
inferred from the generic signature combined with those substitutions.

The style is controlled via a enum rather than a boolean, to avoid problems with
trying to pass an indent like `map->dump(out, indent)`, where the integer indent
coerces to a bool, rather than error.

Fixes rdar://problem/40074968.

2018-05-15 22:17:52 +10:00

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