Safe Haskell	Safe-Inferred
Language	Haskell2010

Numeric.MathExpr

Synopsis

evaluate :: Settings -> String -> [(String, Double)] -> Double
data Settings = Settings {
- operators :: [(Char, Int, Double -> Double -> Double)]
- functions :: [(String, Double -> Double)]
}
defaultFunctions :: [([Char], Double -> Double)]
defaultOperators :: [(Char, Int, Double -> Double -> Double)]

Documentation

evaluate :: Settings -> String -> [(String, Double)] -> Double Source #

Evaluate an expression Example: `evaluate def "x + y ^ 2" [("x", 1), ("y", 2)]

data Settings Source #

Operators are in the form (character, precedence, function) Example: (+, 0, (+)), ('', 1, ()) (higher the precedence, the sooner the operator operates)

Functions are in the form (name, function) Example: ("ln", log)

Constructors

Settings
Fields operators :: [(Char, Int, Double -> Double -> Double)] functions :: [(String, Double -> Double)]

Instances

Instances details

Default Settings Source #
Instance details Defined in Numeric.MathExpr Methods def :: Settings #

defaultFunctions :: [([Char], Double -> Double)] Source #

Functions are in the form (name, function) Example: ("ln", log)

defaultOperators :: [(Char, Int, Double -> Double -> Double)] Source #

Operators are in the form (character, precedence, function) Example: (+, 0, (+)), ('', 1, ()) (higher the precedence, the sooner the operator operates)