Parse a string according to a format string.

scanf [fmt|Hello %s|] "Hello world!" :: Maybe (String :+ ())
  = ("world!" :+ ())

Print a string according to a format string.

printf [fmt|Hello %s|] ("everyone!" :+ ())
  = "Hello everyone!" 

A pretty pair type to build lists with values of different types. Remember to close lists with ().

3 :+ "14" :+ () :: Int :+ String :+ ()

Parse a typed Format string.

The following conversion strings are supported:

• %d: signed integer (Int)
• %l: signed integer (Integer, unbounded)
• %f: floating point (Double)
• %s: string of non-space characters (String)
• %c: single character (Char)
• %%: parse/print a literal percent character

N.B.: in scanf, spaces in the format string match any number of whitespace character until the next nonspace character.

[fmt|%d lazy %s and %d strict %s|]
  :: Format (Int :+ String :+ Int :+ String :+ ())

Construct a format string. This is an alternative to fmt that doesn't rely on Template Haskell.

The components of a format string are composed using (.) (function composition) and (%) (wrapper for constant strings).

fmt_ (int . " lazy " % string . " and " % int . " strict " % string)
  :: Format (Int :+ String :+ Int :+ String :+ ())

Typed scanf/printf format strings. They can be built using the fmt quasiquote or with the fmt_ function and format combinators.

Append a constant string to a format string component.

N.B.: in scanf, spaces in the format string match any number of whitespace character until the next nonspace character.

Format an Integer.

Format an Int.

Format a Double.

Format a String.

Format a Char.