zturner added a comment.
In https://reviews.llvm.org/D27459#614672, @clayborg wrote:
> Does llvm::formatv allow you to specify the base of integers, or just where
> they go? Can you give it width, number base, leading characters and other
> things like a lot of what printf does?
You can specify hex and decimal. No other bases, although that could be added.
To the other questions, yes. Here are some examples:
std::string S = formatv("{0}", 7); // S = "7"
S = formatv("{0,-3}", 7); // S = "7 " (-3 indicates left align inside a
field of width 3)
S = formatv("{0,=3}", 7); // S = " 7 " (=3 indicates center align inside a
field of width 3)
S = formatv("{0,=10; x}, 23); // S = " 0x17 " (=10 indicates center
align inside a field of width 10, x indicates hex. , is the alignment marker
; is the style marker
S = formatv("{0;P}", 0.12345); // S = "12.35%" (P indicates to format as a
percentage, only valid for floating point types. Default precision is 2
S = formatv("{0;3P}", 0.12345); // S = "12.345%" (P indicates to format as
a percentage, only valid for floating point types. Explicitly specify
precision of 3.
There are lots of other things you can do, and since I wrote / designed it, I'm
happy to add additional features that you or others request.
https://reviews.llvm.org/D27459
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