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Making truthTable function to generate string without colour #6

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Making truthTable function to generate string without colour #6

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18 changes: 13 additions & 5 deletions src/Data/Logic/Propositional/Tables.hs
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Expand Up @@ -9,6 +9,7 @@ module Data.Logic.Propositional.Tables
, colourBool
, showBool
, truthTable
, truthTablewithColor
, truthTableP
) where

Expand All @@ -21,7 +22,12 @@ type Printer = (Expr -> String, Bool -> String)

-- | The 'truthTable' function produces a truth table for the given expression.
truthTable :: Expr -> String
truthTable = truthTableP (show, colourBool)
truthTable = truthTableP (show, showBool)

-- | This 'truthTablewithColor' function produces a coloured truth
-- table with green for 'True' and red for 'False'
truthTablewithColor :: Expr -> String
truthTablewithColor = truthTableP (show, colourBool)

-- | The 'truthTableP' is a configurable version of 'truthTable' which allows a
-- printer function to be selected, so for example one can print ASCII truth
Expand All @@ -47,10 +53,12 @@ showBool :: Bool -> String
showBool True = "T"
showBool False = "F"

-- | Prints a green @T@ for 'True' and a red @F@ for 'False'. This is used when
-- producing a string representation of a truth table with 'truthTable'. It can
-- also be used as (as the second component of a 'Printer' pair) as an argument
-- to the configurable 'truthTableP' function.
-- | Prints a green @T@ for 'True' and a red @F@ for 'False'. This is
-- used when producing a string representation of a truth table with
-- 'truthTablewithColor'. It can also be used as (as the second
-- component of a 'Printer' pair) as an argument to the configurable
-- 'truthTableP' function.
colourBool :: Bool -> String
colourBool True = show . green . text $ "T"
colourBool False = show . red . text $ "F"