有没有办法将类型的一致性限制为类型的集合？
让我举例说明：
give_foo (garbage: ANY): STRING
do
if attached {STRING} garbage as l_s then
Result := l_s
elseif attached {INTEGER} garbage as l_int then
Result := l_int.out
elseif attached {JSON_OBJECT} garbage as l_int then
Result := l_int.representation
elseif attached {RABBIT} garbage as l_animal then
Result := l_animal.name + l_animal.color
else
Result := ""
check
unchecked_type_that_compiler_should_be_able_to_check_for_me: False
end
end
end
我不能做类似的事情（就像转换函数可以做的那样）
give_foo (garbage: {STRING, INTEGER, JSON_OBJECT, RABBIT}): STRING
do
if attached {STRING} garbage as l_s then
Result := l_s
elseif attached {INTEGER} garbage as l_int then
Result := l_int.out
elseif attached {JSON_OBJECT} garbage as l_int then
Result := l_int.representation
elseif attached {RABBIT} garbage as l_animal then
Result := l_animal.name + l_animal.color
else
Result := ""
check
unchecked_type_that_compiler_should_be_able_to_check_for_me: False
end
end
end
或类似的东西
not_garbage_hash_table: HASH_TABLE[{INTEGER, STRING, ANIMAL}, STRING]
由于以下几个原因，不支持符合类型集合：
如果需要检查参数是否为预期类型之一，则可以使用以下前提条件：
across {ARRAY [TYPE [detachable ANY]]}
<<{detachable STRING}, {INTEGER}, {detachable JSON_OBJECT}>> as t
some argument.generating_type.conforms_to (t.item) end
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我来说两句