[PATCH] D124486: [clangd] ExtractVariable support for C and Objective-C

[David Goldman via Phabricator via cfe-commits]

dgoldman added inline comments.


================
Comment at: clang-tools-extra/clangd/refactor/tweaks/ExtractVariable.cpp:418
+  if (const auto *ME = dyn_cast<MemberExpr>(E))
+    if (const auto *TE = dyn_cast<CXXThisExpr>(ME->getBase()))
+      if (TE->isImplicit())
----------------
sammccall wrote:
> dgoldman wrote:
> > sammccall wrote:
> > > oops, I forgot one detail: we want ME->getBase()->IgnoreImpCasts()
> > > 
> > > (in `void nonConstMethod() { constMethod(); }` there's an ImplicitCastExpr in there...
> > Hmm, is this right, I tested out that example and it seems like that's actually a `CXXMemberCallExpr` which this doesn't handle?
> The callee of the CXXMemberCallExpr is the MemberExpr i'm talking about here.
Right but this code here doesn't handle CXXMemberCallExpr, only MemberExpr - so we don't even see the callee here. If I add the following above:

```
  if (const auto *MCE = dyn_cast<CXXMemberCallExpr>(E))
    E = MCE->getCallee();
```

and do `ME->getBase()->IgnoreImpCasts()` then:


```
    class Test {
      int constMethod() const { return 1; }
      int nonConstMethod() { return [[constMethod()]]; }
    };
```

will be unavailable.


Repository:
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https://reviews.llvm.org/D124486