Simple interpreter that, when given an arithmetic expression as a string, can return the value.

• Is only useful to show an example of how the evaluator works

• expression_manager

• Parse the expression
• Validate the expression
• Create all the elements of the expression
• Add the elements to a binaryTree

• Program

• element
• binary_tree

• Provide a global point of acces to the operators.
• Construct operators
• Construct variables

• Expression

• Centralize all the messages that the final user could see.
• Centralize all the exceptions of the evaluator

• All Packages

• Provide usefull clases to make a BinaryTree
• Provide algorithms to pass over the BinaryTree
• Order IElements in BynaryTrees in base on their priority

• expression_manager

• Create an OperatorFactory thath given the symbol return the correct Operator
• Create an user_interface
• The intelligence to know what type of element is and create this could be in the package element

sequenceDiagram
    program->>+expression_manager: Expression as String
    expression_manager->>element: Parsed element as String
    element --> element: Convert String to IElement
    element ->> expression_manager: IElement as Object
    expression_manager->> binary_tree: IElement
    binary_tree --> binary_tree: priorize IElement
    binary_tree ->> expression_manager: priorized BinaryTree
    expression_manager ->> program: Result as a Double