diff options
| -rw-r--r-- | libsolidity/analysis/TypeChecker.cpp | 19 | ||||
| -rw-r--r-- | test/libsolidity/SolidityNameAndTypeResolution.cpp | 34 |
2 files changed, 50 insertions, 3 deletions
diff --git a/libsolidity/analysis/TypeChecker.cpp b/libsolidity/analysis/TypeChecker.cpp index 40853608..615bc402 100644 --- a/libsolidity/analysis/TypeChecker.cpp +++ b/libsolidity/analysis/TypeChecker.cpp @@ -22,6 +22,7 @@ #include <libsolidity/analysis/TypeChecker.h> #include <memory> +#include <boost/algorithm/string/predicate.hpp> #include <boost/range/adaptor/reversed.hpp> #include <libsolidity/ast/AST.h> #include <libsolidity/inlineasm/AsmAnalysis.h> @@ -1800,7 +1801,23 @@ void TypeChecker::expectType(Expression const& _expression, Type const& _expecte _expectedType.toString() + "." ); - } + } + + if ( + type(_expression)->category() == Type::Category::RationalNumber && + _expectedType.category() == Type::Category::FixedBytes + ) + { + auto literal = dynamic_cast<Literal const*>(&_expression); + + if (literal && !boost::starts_with(literal->value(), "0x")) + m_errorReporter.warning( + _expression.location(), + "Decimal literal assigned to bytesXX variable will be left-aligned. " + "Use an explicit conversion to silence this warning." + ); + } + } void TypeChecker::requireLValue(Expression const& _expression) diff --git a/test/libsolidity/SolidityNameAndTypeResolution.cpp b/test/libsolidity/SolidityNameAndTypeResolution.cpp index 9775d6d0..e18303f5 100644 --- a/test/libsolidity/SolidityNameAndTypeResolution.cpp +++ b/test/libsolidity/SolidityNameAndTypeResolution.cpp @@ -2183,6 +2183,36 @@ BOOST_AUTO_TEST_CASE(test_byte_is_alias_of_byte1) ETH_TEST_REQUIRE_NO_THROW(parseAndAnalyse(text), "Type resolving failed"); } +BOOST_AUTO_TEST_CASE(warns_assigning_decimal_to_bytesxx) +{ + char const* text = R"( + contract Foo { + bytes32 a = 7; + } + )"; + CHECK_WARNING(text, "Decimal literal assigned to bytesXX variable will be left-aligned."); +} + +BOOST_AUTO_TEST_CASE(does_not_warn_assigning_hex_number_to_bytesxx) +{ + char const* text = R"( + contract Foo { + bytes32 a = 0x1234; + } + )"; + CHECK_SUCCESS_NO_WARNINGS(text); +} + +BOOST_AUTO_TEST_CASE(explicit_conversion_from_decimal_to_bytesxx) +{ + char const* text = R"( + contract Foo { + bytes32 a = bytes32(7); + } + )"; + CHECK_SUCCESS_NO_WARNINGS(text); +} + BOOST_AUTO_TEST_CASE(assigning_value_to_const_variable) { char const* text = R"( @@ -3718,12 +3748,12 @@ BOOST_AUTO_TEST_CASE(conditional_with_all_types) byte[2] memory a; byte[2] memory b; var k = true ? a : b; - k[0] = 0; //Avoid unused var warning + k[0] = byte(0); //Avoid unused var warning bytes memory e; bytes memory f; var l = true ? e : f; - l[0] = 0; // Avoid unused var warning + l[0] = byte(0); // Avoid unused var warning // fixed bytes bytes2 c; |