Use Clang 11 (#1846)

.clang-tidy

@@ -4,14 +4,37 @@ Checks: >-
   -abseil-*,
   -android-*,
   -boost-*,
+  -bugprone-branch-clone,
   -bugprone-macro-parentheses,
+  -bugprone-narrowing-conversions,
+  -bugprone-reserved-identifier,
+  -bugprone-signed-char-misuse,
+  -bugprone-suspicious-include,
+  -bugprone-too-small-loop-variable,
+  -bugprone-unhandled-self-assignment,
+  -cert-dcl37-c,
   -cert-dcl50-cpp,
+  -cert-dcl51-cpp,
   -cert-err58-cpp,
+  -cert-oop54-cpp,
+  -cert-oop57-cpp,
+  -cert-str34-c,
   -clang-analyzer-core.CallAndMessage,
+  -clang-analyzer-deadcode.DeadStores,
+  -clang-analyzer-optin.*,
   -clang-analyzer-osx.*,
   -clang-analyzer-security.*,
+  -clang-diagnostic-fortify-source,
+  -clang-diagnostic-shadow-field,
+  -cppcoreguidelines-avoid-c-arrays,
   -cppcoreguidelines-avoid-goto,
+  -cppcoreguidelines-avoid-magic-numbers,
+  -cppcoreguidelines-avoid-non-const-global-variables,
   -cppcoreguidelines-c-copy-assignment-signature,
+  -cppcoreguidelines-init-variables,
+  -cppcoreguidelines-macro-usage,
+  -cppcoreguidelines-narrowing-conversions,
+  -cppcoreguidelines-non-private-member-variables-in-classes,
   -cppcoreguidelines-owning-memory,
   -cppcoreguidelines-pro-bounds-array-to-pointer-decay,
   -cppcoreguidelines-pro-bounds-constant-array-index,
@@ -37,10 +60,16 @@ Checks: >-
   -google-runtime-int,
   -google-runtime-references,
   -hicpp-*,
+  -llvm-else-after-return,
   -llvm-header-guard,
   -llvm-include-order,
+  -llvm-qualified-auto,
+  -llvmlibc-*,
+  -misc-non-private-member-variables-in-classes,
+  -misc-no-recursion,
   -misc-unconventional-assign-operator,
   -misc-unused-parameters,
+  -modernize-avoid-c-arrays,
   -modernize-deprecated-headers,
   -modernize-pass-by-value,
   -modernize-pass-by-value,
@@ -48,14 +77,25 @@ Checks: >-
   -modernize-use-auto,
   -modernize-use-default-member-init,
   -modernize-use-equals-default,
+  -modernize-use-trailing-return-type,
   -mpi-*,
   -objc-*,
   -performance-unnecessary-value-param,
   -readability-braces-around-statements,
+  -readability-const-return-type,
+  -readability-convert-member-functions-to-static,
   -readability-else-after-return,
   -readability-implicit-bool-conversion,
+  -readability-isolate-declaration,
+  -readability-magic-numbers,
+  -readability-make-member-function-const,
   -readability-named-parameter,
+  -readability-qualified-auto,
+  -readability-redundant-access-specifiers,
   -readability-redundant-member-init,
+  -readability-redundant-string-init,
+  -readability-uppercase-literal-suffix,
+  -readability-use-anyofallof,
   -warnings-as-errors,
   -zircon-*
 WarningsAsErrors: '*'