[llvm-bugs] [Bug 38318] New: ast_matchers::findAll does not work with elements of different type to root

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=38318

            Bug ID: 38318
           Summary: ast_matchers::findAll does not work with elements of
                    different type to root
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: libclang
          Assignee: unassignedclangbugs at nondot.org
          Reporter: steveire at gmail.com
                CC: klimek at google.com, llvm-bugs at lists.llvm.org

We should be able to do something like 

 Decl* someRootDeclContext = ...;

 clang::ast_matchers::match(
   decl(findAll(callExpr()))
   , *someRootDeclContext, *Result.Context);

However, that does not work because findAll is implemented with eachOf and 

   decl(eachOf(callExpr(), expr()))

doesn't work for the same reason

   decl(callExpr())

doesn't work - a decl is never a callExpr.

findAll should be changed to account for this use-case.

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