Merge pull request ethereum#14408 from ethereum/check-style-for-using-namespace-std-v2

Check style coverage for using namespace std

Author: nikola-matic

scripts/check_style.sh

@@ -20,6 +20,10 @@ EXCLUDE_FILES=(
 EXCLUDE_FILES_JOINED=$(printf "%s\|" "${EXCLUDE_FILES[@]}")
 EXCLUDE_FILES_JOINED=${EXCLUDE_FILES_JOINED%??}
 
+NAMESPACE_STD_FREE_FILES=(
+    libevmasm/*
+)
+
 (
 REPO_ROOT="$(dirname "$0")"/..
 cd "$REPO_ROOT" || exit 1
@@ -58,6 +62,9 @@ FORMATERROR=$(
     # unqualified move()/forward() checks, i.e. make sure that std::move() and std::forward() are used instead of move() and forward()
     preparedGrep "move\(.+\)" | grep -v "std::move" | grep -E "[^a-z]move"
     preparedGrep "forward\(.+\)" | grep -v "std::forward" | grep -E "[^a-z]forward"
+    # make sure `using namespace std` is not used in INCLUDE_DIRECTORIES
+    # shellcheck disable=SC2068,SC2068
+    grep -nIE -d skip "using namespace std;" ${NAMESPACE_STD_FREE_FILES[@]}
 ) | grep -E -v -e "^[a-zA-Z\./]*:[0-9]*:\s*\/(\/|\*)" -e "^test/" || true
 )