Fortran中的可变长度参数列表? [英] Variable length argument list in Fortran?

问题描述

Fortran 有没有像 C 那样处理任意长度的子程序参数列表?(顺便说一句，礼物"不适用于我正在尝试做的事情.)谢谢.

Has Fortran ever gotten around to handling subroutine argument lists with arbitrary length, like C can do? (BTW, "present" isn't going to work for what I am trying to do.) Thanks.

推荐答案

Fortran 中没有这样的子程序.

There are no such subroutines in Fortran.

Fortran 2008 中子程序语句的语法规则是 (12.6.2.3, R1235):

The syntax rule for a subroutine statement in Fortran 2008 is (12.6.2.3, R1235):

[ prefix ] 子程序子程序名称 [ ( [ dummy-arg-list ] ) [ proc-language-binding-spec ] ]

[ prefix ] SUBROUTINE subroutine-name [ ( [ dummy-arg-list ] ) [ proc-language-binding-spec ] ]

其中 dummy-arg-list 是 dummy-arg 的 list(在假定的语法规则术语中).dummy-arg 是 (R1235) name 或文字 *.

where dummy-arg-list is a list (in assumed syntax rule terms) of dummy-args. A dummy-arg is (R1235) either a name or a literal *.

[在我们对可变参数支持的可能性感到过于兴奋之前，*当然是指一个替代返回指示器.]

[Before we get too excited about the possibility of variadic support, the * refers, of course, to an alternate return indicator.]

列表 (R101) 仍然是指(在源时间)明确定义的项目数量.

A list (R101) still refers to a well-defined (at source time) number of items.

关于与 C 的互操作性有一个明确的限制，即 (15.3.7) C 原型

There is a stated restriction regarding interoperability with C, that (15.3.7) the C prototype

... 没有由省略号 (...) 表示的可变参数

... does not have variable arguments as denoted by the ellipsis (...)

类似的参数适用于 (Fortran) 函数.

Similar arguments apply to (Fortran) functions.

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