solidity/test/libsolidity/syntaxTests/parsing/mapping_nonelementary_key_2.sol

contract c {
	struct S {
		uint x;
	}
	mapping(S => uint) data;
}
// ----
// TypeError: (47-48): Only elementary types, contract types or enums are allowed as mapping keys.
Dynamic type as mapping key returns error instead of assertion fail 2018-07-31 09:44:39 +00:00			`contract c {`
			`struct S {`
			`uint x;`
			`}`
			`mapping(S => uint) data;`
			`}`
			`// ----`
Allow user-defined types as mapping keys in parser and restrict to contracts during type checking. 2020-02-04 09:59:23 +00:00			`// TypeError: (47-48): Only elementary types, contract types or enums are allowed as mapping keys.`