$(BNF ModifierType := ModAttrType | ModParenType /ModAttrType := Modifier Type /ModParenType := Modifier "(" Type ")" /Modifier := const | immutable | shared | inout)
See Implementation
$(BNF ModifierType := ModAttrType | ModParenType /ModAttrType := Modifier Type /ModParenType := Modifier "(" Type ")" /Modifier := const | immutable | shared | inout)