elixir - 如何获取e剂中每种类型的最小值和最大值

Question

如何获取e剂中每种类型的最小值和最大值？例如整数，浮点数和字符串的最大可能长度。

我知道在C语言中，它在limits.h中定义为INT_MIN，INT_MAX等。关于 Elixir 中这些类型的限制的文档在哪里？

Answer 1

Elixir(实际上是Erlang)使用bignum arithmetic，这是计算机科学中使用的一种算术软件，其中(引用Wikipedia)

calculations are performed on numbers whose digits of precision are limited only by the available memory of the host system

Erlang文档中有 a page，它讨论了Erlang VM的限制(例如，原子最多可以包含255个字符)；正如您所看到的，如果您看一下该页面，甚至没有提到整数限制。

Erlang/Elixir中的整数仅受系统上可用内存的限制，因此实际上 没有限制，其大小可以限制为。

对于二进制文件(字符串)，我只引用上面链接的页面所说的内容:

In the 32-bit implementation of Erlang, 536870911 bytes is the largest binary that can be constructed or matched using the bit syntax. (In the 64-bit implementation, the maximum size is 2305843009213693951 bytes.) If the limit is exceeded, bit syntax construction will fail with a system_limit exception, while any attempt to match a binary that is too large will fail. This limit is enforced starting with the R11B-4 release; in earlier releases, operations on too large binaries would in general either fail or give incorrect results. In future releases of Erlang/OTP, other operations that create binaries (such as list_to_binary/1) will probably also enforce the same limit.