Module rustc_save_analysis::dump_visitor
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Write the output of rustc’s analysis to an implementor of Dump.
Dumping the analysis is implemented by walking the AST and getting a bunch of
info out from all over the place. We use DefIds to identify objects. The
tricky part is getting syntactic (span, source text) and semantic (reference
DefIds) information for parts of expressions which the compiler has discarded.
E.g., in a path foo::bar::baz, the compiler only keeps a span for the whole
path and a reference to baz, but we want spans and references for all three
idents.
SpanUtils is used to manipulate spans. In particular, to extract sub-spans
from spans (e.g., the span for bar from the above example path).
DumpVisitor walks the AST and processes it, and Dumper is used for
recording the output.