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Description | |||||||||
QuasiQuoter for interpolated strings using Perl 6 syntax. The q form does one thin and does it well: It contains a multi-line string with no interpolation at all: {--} import Text.InterpolatedString.Perl6 (q) foo :: String foo = [$q| Well here is a multi-line string! |] The qc form interpolates curly braces: Expressions inside {} will be directly interpolated if it's a String, or have show called if it is not. Escapin of '{' is done with backslash. For interpolatin numeric expressions without an explicit type signature, use the ExtendedDefaultRules lanuage pragma, as shown below: {--} import Text.InterpolatedString.Perl6 (qc) bar :: String bar = [$qc| Well {"hello" ++ " there"} {6 * 7} |] bar will have the value " Well hello there 42 ". If you want control over how show works on your types, define a custom ShowQ instance: import Text.InterpolatedString.Perl6 (qc, ShowQ(..)) instance ShowQ ByteString where showQ = unpack That way you interpolate bytestrings will not result in double quotes or character escapes. The qq form adds to the qc form with a simple shorthand: '$foo' means '{foo}', namely interpolating a single variable into the string. {--} import Text.InterpolatedString.Perl6 (qq) baz :: String baz = [$qc| Hello, $who |] where who = World | |||||||||
Synopsis | |||||||||
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Documentation | |||||||||
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QuasiQuoter for interpolatin Haskell values into a string literal. The pattern portion is undefined. | |||||||||
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Produced by Haddock version 2.4.2 |