Text.ParserCombinators.Parsec.ParserFunction

Documentation

data Expr

The Expr data type provides a basis for ordering mathematical operations.

Instances

Eq Expr

Show Expr

type Variable = String

evalString :: String -> [(Variable, Complex Double)] -> Maybe (Complex Double)

evalString evaluates a string-expression using a list of variable definitions with values.

evalExpr :: Expr -> [(Variable, Complex Double)] -> Maybe (Complex Double)

evalExpr evaluates an expression tree using a list of variable definitions with values.

stringToExpr :: String -> Maybe Expr

stringToExpr parses a string-expression and returns a maybe expression tree.

buildExpr :: Parser Expr

eval :: Map Variable (Complex Double) -> Maybe Expr -> Maybe (Complex Double)

eval takes a map of variable definitions and values, and a maybe expression tree, to produce maybe a numerical value.