Module Percent.Format

A Format.t tells Percent.format how to render a floating-point value as a string, like a printf conversion specification.

For example:

format (Format.exponent ~precision) = sprintf "%.e" precision

The _E naming suffix in Format values is mnenomic of a capital E (rather than e) being used in floating-point exponent notation.

Here is the documentation of the floating-point conversion specifications from the OCaml manual:

• f: convert a floating-point argument to decimal notation, in the style dddd.ddd.

• F: convert a floating-point argument to OCaml syntax (dddd. or dddd.ddd or d.ddd e+-dd).

• e or E: convert a floating-point argument to decimal notation, in the style d.ddd e+-dd (mantissa and exponent).

• g or G: convert a floating-point argument to decimal notation, in style f or e, E (whichever is more compact).

• h or H: convert a floating-point argument to hexadecimal notation, in the style 0xh.hhhh e+-dd (hexadecimal mantissa, exponent in decimal and denotes a power of 2).