Lispex

v0.1.0

Lispex v0.1.0 Env View Source

This is the Environment module. Used by the Eval module to evaluate the scheme code. Contains the definition for Scheme constructs in a Map .

Link to this section Summary

Functions

get(k, env)

Fetches the value for the given key from the supplied environment

new_env(outer \\ nil)

Creates a new environment map

put(k, v, env)

Inserts a key value pair in the current environment and returns it

Link to this section Functions

Link to this function get(k, env) View Source

Fetches the value for the given key from the supplied environment

Parameters

k : Key env : A Map which represents the current environment.

Example 

iex> Env.get(:a, env)
5
Link to this function new_env(outer \\ nil) View Source

Creates a new environment map.

Returns Map

Parameters

  • outer : A Map which represents the outer Environment. Default value nil for this optional parameter.

Example 

iex> Env.new_env()
%{}
Link to this function put(k, v, env) View Source

Inserts a key value pair in the current environment and returns it.

Returns Map

Parameters

  • k : Key
  • v : Value
  • env : A Map which represents the current environment.

Example 

iex> Env.put(:a, 5, %{ })
%{:a : 5}