19 lines
635 B
Plaintext
19 lines
635 B
Plaintext
module Lunarline.String where
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import Prelude
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import Data.String (Pattern(..), joinWith, split)
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-- | Indent a multi line string
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indent :: Int -> String -> String
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indent amount = split (Pattern "\n") >>> map (indentOne amount) >>> joinWith "\n"
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-- | Indents a single line string
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indentOne :: Int -> String -> String
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indentOne n a
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| n <= 0 = a
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| otherwise = " " <> indentOne (n - 1) a
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-- | Add parenthesis to a pretty printer when a condition holds
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parensWhen :: forall a. (a -> Boolean) -> (a -> String) -> a -> String
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parensWhen predicate print toPrint = if predicate toPrint then "(" <> print toPrint <> ")" else print toPrint |