[Issue 19982] padLeft usability issues

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=19982

shove <shove at 163.com> changed:

           What    |Removed                     |Added
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                 CC|                            |shove at 163.com

--- Comment #1 from shove <shove at 163.com> ---
I think the function you want is:
std.string.leftJustify(), std.string. rightJustify().

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std.range.padLeft() is normal, and it returns a range. The assert in the source
file and the four lines I added are as follows:

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    import std.algorithm.comparison : equal;

    assert([1, 2, 3, 4].padLeft(0, 6).equal([0, 0, 1, 2, 3, 4]));
    assert([1, 2, 3, 4].padLeft(0, 3).equal([1, 2, 3, 4]));

    assert("abc".padLeft('_', 6).equal("___abc"));

    assert("a string".padLeft('0', 10).equal("00a string"));
    assert("a string".padLeft('0', 10).equal([48, 48, 97, 32, 115, 116, 114,
105, 110, 103]));

    assert("a string".padLeft(dchar('0'), 10).equal("00a string"));
    assert("a string".padLeft(dchar('0'), 10).equal([48, 48, 97, 32, 115, 116,
114, 105, 110, 103]));

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