version
A version with an arbitrary number of components.
The first three components have names that can be used as fields: major,
minor, patch. All following components do not have names.
The list of components is semantically extended by an infinite list of
zeros. This means that, for example, 0.8 is the same as 0.8.0. As a
special case, the empty version (that has no components at all) is the same
as 0, 0.0, 0.0.0, and so on.
You can convert a version to an array of explicitly given components using
the array constructor.
构造函数
如果类型具有构造函数，可以像函数一样调用它来创建一个该类型的值。
Creates a new version.
It can have any number of components (even zero).
#version() \
#version(1) \
#version(1, 2, 3, 4) \
#version((1, 2, 3, 4)) \
#version((1, 2), 3)
components
The components of the version (array arguments are flattened)
定义
函数和类型可以有与其关联的定义 (成员或方法)。可以使用 "." 操作符来访问调用它们。
at
Retrieves a component of a version.
The returned integer is always non-negative. Returns 0 if the version
isn't specified to the necessary length.
index
The index at which to retrieve the component. If negative, indexes from the back of the explicitly given components.