solidity/test/libsolidity/syntaxTests/string/unicode_escape_literals_invalid_codepoint.sol

contract test {
    function f() public pure returns (string memory) {
        return "\xc1";
    }
}
// ----
// TypeError 6359: (86-92): Return argument type literal_string hex"c1" (contains invalid UTF-8 sequence at position 0) is not implicitly convertible to expected type (type of first return variable) string memory.
Add more tests for strings with unicode (escapes) 2020-07-13 17:23:42 +00:00			`contract test {`
			`function f() public pure returns (string memory) {`
			`return "\xc1";`
			`}`
			`}`
			`// ----`
Display string literal as hex in error messages if it is not printable ASCII 2020-09-23 12:53:56 +00:00			`// TypeError 6359: (86-92): Return argument type literal_string hex"c1" (contains invalid UTF-8 sequence at position 0) is not implicitly convertible to expected type (type of first return variable) string memory.`