[frontend] Check if a method is a cpp lambda call operator

Summary:
Added a function to check if a method is a cpp lambda call operator that will be used in later diffs

#skipdeadcode

Reviewed By: jvillard

Differential Revision: D23564089

fbshipit-source-id: 144c3d735

infer/src/clang/CMethodProperties.ml

@@ -92,6 +92,19 @@ let get_method_body method_decl =
       raise CFrontend_errors.Invalid_declaration
 
 
+let is_cpp_lambda_call_operator meth_decl =
+  let open Clang_ast_t in
+  match meth_decl with
+  | CXXMethodDecl (di, _, _, _, _) -> (
+    match CAst_utils.get_decl_opt di.di_parent_pointer with
+    | Some (Clang_ast_t.CXXRecordDecl (_, _, _, _, _, _, _, cxx_rdi)) ->
+        Option.is_some cxx_rdi.xrdi_lambda_call_operator
+    | _ ->
+        false )
+  | _ ->
+      false
+
+
 let is_cpp_virtual method_decl =
   let open Clang_ast_t in
   match method_decl with

infer/src/clang/CMethodProperties.mli

@@ -19,6 +19,8 @@ val get_param_decls : Clang_ast_t.decl -> Clang_ast_t.decl list
 
 val get_method_body : Clang_ast_t.decl -> Clang_ast_t.stmt option
 
+val is_cpp_lambda_call_operator : Clang_ast_t.decl -> bool
+
 val is_cpp_virtual : Clang_ast_t.decl -> bool
 
 val get_init_list_instrs :