Function std.path.isValidFilename

The maximum length of filename is given by the constant core.stdc.stdio.FILENAME_MAX. (On Windows, this number is defined as the maximum number of UTF-16 code points, and the test will therefore only yield strictly correct results when filename is a string of wchars.)

On Windows, the following criteria must be satisfied (source):

• filename must not contain any characters whose integer representation is in the range 0-31.
• filename must not contain any of the following reserved

  characters: <>:"/\|?*

• filename may not end with a space (' ') or a period ('.').

On POSIX, filename may not contain a forward slash ('/') or the null character ('\0').

Prototype

bool isValidFilename(Range)(
  Range filename
)
if (is(StringTypeOf!Range) || isRandomAccessRange!Range && hasLength!Range && hasSlicing!Range && isSomeChar!(ElementEncodingType!Range));

Parameters

Returns

true if and only if filename is not empty, not too long, and does not contain invalid characters.

Example

import std.utf : byCodeUnit;

assert(isValidFilename("hello.exe".byCodeUnit));