XMonad.Actions.Eval

Evaluate haskell expressions at runtime in the running xmonad instance.

Usage

This module provides functions to evaluate haskell expressions at runtime To use it, bind a key to evalExpression, for example in combination with a prompt:

import XMonad
import XMonad.Actions.Eval
import XMonad.Prompt.Input
..
  , ((modMask,xK_t), inputPrompt defaultXPConfig "Eval" >>= flip whenJust (evalExpression defaultEvalConfig))

For detailed instructions on editing your key bindings, see XMonad.Doc.Extending.

Documentation

evalExpression :: EvalConfig -> String -> X ()

Evaluates a given expression, but discard the returned value. Provided for more convenient use in keybindings

evalExpressionWithReturn :: EvalConfig -> String -> X String

Evaluates a given expression whose result type has to be an instance of Show

data EvalConfig

Configuration structure

Constructors

EvalConfig

Fields

• handleError :: InterpreterError -> X String

  Function to handle errors

• imports :: [(ModuleName, Maybe String)]

  Modules to import for interpreting the expression. The pair consists of the module name and an optional qualification of the imported module.

• modules :: [String]

  Other source files that should be loaded The definitions of these modules will be visible regardless of whether they are exported.

defaultEvalConfig :: EvalConfig

Defaults for evaluating expressions.