[PATCH] D84226: [AST][RecoveryExpr] Part1: Support dependent binary operator in C for error recovery.

[Haojian Wu via Phabricator via cfe-commits]

hokein added inline comments.


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Comment at: clang/include/clang/Basic/LangOptions.def:153
 COMPATIBLE_LANGOPT(RecoveryASTType, 1, 0, "Preserve the type in recovery expressions")
+COMPATIBLE_LANGOPT(CDependence, 1, 0, "Build dependent AST nodes in C for better error recovery")
 
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sammccall wrote:
> Why is this not just the RecoveryAST flag? Is there some use of dependence outside the error-handling path?
> 
> If the language is C, recovery-AST only works if this flag is on too. So they might as well always have the same value.
> If the language is C++, this flag is meaningless, right?
This flag is mainly for turning off early typo-corrections for C.

Thinking more about this, you're right, looks like using the RecoveryAST is possible:
- these early typo-corrections applies non-C++ code, and have to be there until we fully implemented recovery-expr-on-c;
- the current default mode of RecoveryAST: on for C++, and off for non-C++;
- for recovery-expr-on-c development, we need to turn on the RecoveryAST and turn off these early typo-corrections;

so `if (!S.getLangOpts().CPlusPlus && !S.getLangOpts().RecoveryAST) {` works.




Repository:
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  https://reviews.llvm.org/D84226/new/

https://reviews.llvm.org/D84226