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-rw-r--r--test/libsolidity/SolidityNameAndTypeResolution.cpp42
1 files changed, 42 insertions, 0 deletions
diff --git a/test/libsolidity/SolidityNameAndTypeResolution.cpp b/test/libsolidity/SolidityNameAndTypeResolution.cpp
index a6027812..6af5f503 100644
--- a/test/libsolidity/SolidityNameAndTypeResolution.cpp
+++ b/test/libsolidity/SolidityNameAndTypeResolution.cpp
@@ -5771,6 +5771,48 @@ BOOST_AUTO_TEST_CASE(pure_statement_check_for_regular_for_loop)
success(text);
}
+BOOST_AUTO_TEST_CASE(warn_multiple_storage_storage_copies)
+{
+ char const* text = R"(
+ contract C {
+ struct S { uint a; uint b; }
+ S x; S y;
+ function f() {
+ (x, y) = (y, x);
+ }
+ }
+ )";
+ CHECK_WARNING(text, "This assignment performs two copies to storage.");
+}
+
+BOOST_AUTO_TEST_CASE(warn_multiple_storage_storage_copies_fill_right)
+{
+ char const* text = R"(
+ contract C {
+ struct S { uint a; uint b; }
+ S x; S y;
+ function f() {
+ (x, y, ) = (y, x, 1, 2);
+ }
+ }
+ )";
+ CHECK_WARNING(text, "This assignment performs two copies to storage.");
+}
+
+BOOST_AUTO_TEST_CASE(warn_multiple_storage_storage_copies_fill_left)
+{
+ char const* text = R"(
+ contract C {
+ struct S { uint a; uint b; }
+ S x; S y;
+ function f() {
+ (,x, y) = (1, 2, y, x);
+ }
+ }
+ )";
+ CHECK_WARNING(text, "This assignment performs two copies to storage.");
+}
+
BOOST_AUTO_TEST_CASE(warn_unused_local)
{
char const* text = R"(