[clang] [Clang][Parser] Have the depth of the abbreviated generic lambdas inside a requires clause differ from the surrounding generic lambda (PR #80656)

[Shafik Yaghmour via cfe-commits]

================
@@ -1385,6 +1385,11 @@ ExprResult Parser::ParseLambdaExpressionAfterIntroducer(
       Diag(RAngleLoc,
            diag::err_lambda_template_parameter_list_empty);
     } else {
+      // We increase the template depth before recursing into a 
requires-clause.
+      // The abbreviated generic lambdas thereof could have different template
+      // depths, avoiding substituting into wrong template parameters during 
the
----------------
shafik wrote:

Can you point to where the use of `TemplateParameterDepth` happens? This makes 
sense but I am curious where this happens in this case.

https://github.com/llvm/llvm-project/pull/80656
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