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cd1d0887dc
Despite the name, ParseExported only hollowed out declarations -- it didn't actually drop any from the AST. This leaves a fair amount of unexported crud behind. Unfortunately, there are a *lot* of ways to expose an unexported declaration from an exported one, and it can be done across files. Because of that, discarding unexported declarations requires a lot of work. This CL implements a decent attempt at pruning as much as possible from the AST in ParseExported mode. First, we analyze the AST of all the files in the package for exported uses of unexported identifiers, iterating to a fixed point. Then, we type check those ASTs. If there are missing identifiers (probably due to a bug in the dependency analysis) we use those errors to re-parse. After that we give up and fall back to the older, less effective trimming. The pkg type changes slightly to accomodate the new control flow. We have to analyze all the files at once because an unexported type might be exposed in another file. Unfortunately, that means we can't parse a single file at a time any more -- the result of parsing a file depends on the result of parsing its siblings. To avoid cache corruption, we have to do the parsing directly in type checking, uncached. This, in turn, required changes to the PosTo* functions. Previously, they operated just on files, but a file name is no longer sufficient to get a ParseExported AST. Change them to work on Packages instead. I squeezed in a bit of refactoring while I was touching them. Change-Id: I61249144ffa43ad645ed38d79e873e3998b0f38d Reviewed-on: https://go-review.googlesource.com/c/tools/+/312471 Trust: Heschi Kreinick <heschi@google.com> Run-TryBot: Heschi Kreinick <heschi@google.com> gopls-CI: kokoro <noreply+kokoro@google.com> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Robert Findley <rfindley@google.com> Reviewed-by: Rebecca Stambler <rstambler@golang.org> |
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| tool | ||
| typeparams | ||
| typesinternal | ||
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