Flexible string literals, convertible to bytesX, bytes and string.

3 files changed, 51 insertions, 15 deletions

diff --git a/libsolidity/SolidityEndToEndTest.cpp b/libsolidity/SolidityEndToEndTest.cpp
index 3ddb0552..ad217546 100644
--- a/libsolidity/SolidityEndToEndTest.cpp
+++ b/libsolidity/SolidityEndToEndTest.cpp
@@ -564,20 +564,6 @@ BOOST_AUTO_TEST_CASE(strings)
 	BOOST_CHECK(callContractFunction("pipeThrough(bytes2,bool)", string("\0\x02", 2), true) == encodeArgs(string("\0\x2", 2), true));
 }
 
-BOOST_AUTO_TEST_CASE(empty_string_on_stack)
-{
-	char const* sourceCode = R"(
-		contract test {
-			function run() external returns(bytes2 ret) {
-				var y = "";
-				ret = y;
-			}
-		}
-	)";
-	compileAndRun(sourceCode);
-	BOOST_CHECK(callContractFunction("run()") == encodeArgs(byte(0x00)));
-}
-
 BOOST_AUTO_TEST_CASE(inc_dec_operators)
 {
 	char const* sourceCode = R"(
@@ -5001,6 +4987,37 @@ BOOST_AUTO_TEST_CASE(struct_named_constructor)
 	BOOST_CHECK(callContractFunction("s()") == encodeArgs(u256(1), true));
 }
 
+BOOST_AUTO_TEST_CASE(literal_strings)
+{
+	char const* sourceCode = R"(
+		contract Test {
+			string public long;
+			string public medium;
+			string public short;
+			string public empty;
+			function f() returns (string) {
+				long = "0123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789001234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678900123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789001234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890";
+				medium = "01234567890123456789012345678901234567890123456789012345678901234567890123456789";
+				short = "123";
+				empty = "";
+				return "Hello, World!";
+			}
+		}
+	)";
+	compileAndRun(sourceCode, 0, "Test");
+	string longStr = "0123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789001234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678900123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789001234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890";
+	string medium = "01234567890123456789012345678901234567890123456789012345678901234567890123456789";
+	string shortStr = "123";
+	string hello = "Hello, World!";
+
+	BOOST_CHECK(callContractFunction("f()") == encodeDyn(hello));
+	BOOST_CHECK(callContractFunction("long()") == encodeDyn(longStr));
+	BOOST_CHECK(callContractFunction("medium()") == encodeDyn(medium));
+	BOOST_CHECK(callContractFunction("short()") == encodeDyn(shortStr));
+	BOOST_CHECK(callContractFunction("empty()") == encodeDyn(string()));
+}
+
+
 BOOST_AUTO_TEST_SUITE_END()
 
 }
diff --git a/libsolidity/SolidityNameAndTypeResolution.cpp b/libsolidity/SolidityNameAndTypeResolution.cpp
index 50fcdbbe..1e40ee4f 100644
--- a/libsolidity/SolidityNameAndTypeResolution.cpp
+++ b/libsolidity/SolidityNameAndTypeResolution.cpp
@@ -283,7 +283,7 @@ BOOST_AUTO_TEST_CASE(large_string_literal)
 	char const* text = "contract test {\n"
 					   "  function f() { var x = \"123456789012345678901234567890123\"; }"
 					   "}\n";
-	BOOST_CHECK_THROW(parseTextAndResolveNames(text), TypeError);
+	BOOST_CHECK_NO_THROW(parseTextAndResolveNames(text));
 }
 
 BOOST_AUTO_TEST_CASE(balance)
@@ -2097,6 +2097,19 @@ BOOST_AUTO_TEST_CASE(struct_named_constructor)
 	BOOST_CHECK_NO_THROW(parseTextAndResolveNames(sourceCode));
 }
 
+BOOST_AUTO_TEST_CASE(literal_strings)
+{
+	char const* text = R"(
+		contract Foo {
+			function f() {
+				string memory long = "01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890";
+				string memory short = "123";
+			}
+		}
+	)";
+	BOOST_CHECK_NO_THROW(parseTextAndResolveNames(text));
+}
+
 BOOST_AUTO_TEST_SUITE_END()
 
 }
diff --git a/libsolidity/solidityExecutionFramework.h b/libsolidity/solidityExecutionFramework.h
index 200940a4..03a201c7 100644
--- a/libsolidity/solidityExecutionFramework.h
+++ b/libsolidity/solidityExecutionFramework.h
@@ -145,6 +145,12 @@ public:
 	{
 		return bytes();
 	}
+	//@todo might be extended in the future
+	template <class Arg>
+	static bytes encodeDyn(Arg const& _arg)
+	{
+		return encodeArgs(u256(0x20), u256(_arg.size()), _arg);
+	}
 
 private:
 	template <class CppFunction, class... Args>