| Portability | GHC |
|---|---|
| Stability | experimental |
| Maintainer | bos@serpentine.com |
| Safe Haskell | None |
Data.Text.Format.Types
Contents
Description
Types for text mangling.
Documentation
A format string. This is intentionally incompatible with other string types, to make it difficult to construct a format string by concatenating string fragments (a very common way to accidentally make code vulnerable to malicious data).
This type is an instance of IsString, so the easiest way to
construct a query is to enable the OverloadedStrings language
extension and then simply write the query in double quotes.
{-# LANGUAGE OverloadedStrings #-}
import Data.Text.Format
f :: Format
f = "hello {}"
The underlying type is Text, so literal Haskell strings that
contain Unicode characters will be correctly handled.
Use this newtype wrapper for your single parameter if you are
formatting a string containing exactly one substitution site.
Instances
| Bounded a => Bounded (Only a) | |
| Enum a => Enum (Only a) | |
| Eq a => Eq (Only a) | |
| Floating a => Floating (Only a) | |
| Fractional a => Fractional (Only a) | |
| Integral a => Integral (Only a) | |
| Num a => Num (Only a) | |
| Ord a => Ord (Only a) | |
| Read a => Read (Only a) | |
| Real a => Real (Only a) | |
| RealFloat a => RealFloat (Only a) | |
| RealFrac a => RealFrac (Only a) | |
| Show a => Show (Only a) | |
| Buildable a => Params (Only a) |
Render a value using its Show instance.
Instances
| Bounded a => Bounded (Shown a) | |
| Enum a => Enum (Shown a) | |
| Eq a => Eq (Shown a) | |
| Floating a => Floating (Shown a) | |
| Fractional a => Fractional (Shown a) | |
| Integral a => Integral (Shown a) | |
| Num a => Num (Shown a) | |
| Ord a => Ord (Shown a) | |
| Read a => Read (Shown a) | |
| Real a => Real (Shown a) | |
| RealFloat a => RealFloat (Shown a) | |
| RealFrac a => RealFrac (Shown a) | |
| Show a => Show (Shown a) | |
| Show a => Buildable (Shown a) |
Integer format control
Render an integral type in hexadecimal.
Constructors
| Hex a |