Language.Scheme.Variables

This module contains code for working with Scheme variables.

Documentation

printEnv :: Env -> IO String

Show the contents of an environment

copyEnv :: Env -> IO Env

Create a deep copy of an environment

extendEnv :: Env -> [((String, String), LispVal)] -> IO Env

Extend given environment by binding a series of values to a new environment.

findNamespacedEnv :: Env -> String -> String -> IO (Maybe Env)

isBound :: Env -> String -> IO Bool

Determine if a variable is bound in the default namespace

isRecBound :: Env -> String -> IO Bool

Determine if a variable is bound in the default namespace, in this env or a parent

isNamespacedBound :: Env -> String -> String -> IO Bool

Determine if a variable is bound in a given namespace

isNamespacedRecBound :: Env -> String -> String -> IO Bool

getVar :: Env -> String -> IOThrowsError LispVal

Retrieve the value of a variable defined in the default namespace

getNamespacedVar :: Env -> String -> String -> IOThrowsError LispVal

Retrieve the value of a variable defined in a given namespace

setVar, defineVar :: Env -> String -> LispVal -> IOThrowsError LispVal

Bind a variable in the default namespace

Set a variable in the default namespace

setNamespacedVar :: Env -> String -> String -> LispVal -> IOThrowsError LispVal

Set a variable in a given namespace

defineNamespacedVar :: Env -> String -> String -> LispVal -> IOThrowsError LispVal

Bind a variable in the given namespace