[PATCH] D83855: [clang] Fix printing of lambdas with capture expressions

[Ilya Golovenko via Phabricator via cfe-commits]

walrus marked an inline comment as done.
walrus added inline comments.


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Comment at: clang/lib/AST/StmtPrinter.cpp:2011
+      Expr *Init = D->getInit();
+      if (D->getInitStyle() == VarDecl::CallInit && !isa<ParenListExpr>(Init))
+        OS << "(";
----------------
kadircet wrote:
> what about having a `Pre` and `Post` print blocks, set to `"(" and ")"` or `" = ` and ""` respectively?
> 
> that way we could get rid of the second if block below.
> 
> 
> also i don't follow why blacklisting for parenlistexpr is needed here (i can see that it will end up printing double parens, but so is `ParenExpr`s, and I think both of them shouldn't be showing up as initializer exprs of captured variables), could you elaborate with a comment and a test case?
I think you're right that skipping `ParenListExpr` is wrong here. I took this part of code from DeclPrinter. The `ParenListExpr`s are skipped when printing variable declarations, but I think it is not applicable when printing lambda expression captures.

Honestly, I didn't get about `Pre` and `Post` blocks. I know it is supported when printing types, but I could not find how to do this for expressions.


Repository:
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  https://reviews.llvm.org/D83855/new/

https://reviews.llvm.org/D83855