问题
在调用Java方法(或内联函数)时,如果参数和参数都是原始类型,则不会对适当的重载方法/构造函数使用扩大转换以定位。
示例
`user=> (Integer. (byte 0))
java.lang IllegalArgumentException: 没有找到与类 java.lang.Integer 匹配的构造函数 (没有源文件:0)
上述问题发生,因为没有 Integer(byte) 构造函数,尽管它应该与 Integer(int) 相匹配。
user=> (bit-shift-left (byte 1) 1)
Reflection warning, NO_SOURCE_PATH:3 - call to shiftLeft can't be resolved.
2`
In the above, a call is made via reflection to Numbers.shiftLeft(Object, Object) and its associated auto-boxing, instead of directly to the perfectly adequate Numbers.shiftLeft(long, int).
Workarounds:
Explicitly casting to the formal type.
Ancillary benefits of fixing:
It would also reduce the amount of method overloading, e.g., RT.intCast(char), intCast(byte), intCast(short), could all be removed, since such calls would pass to RT.intCast(int).