Add support for basic arithmetic operations

[tjhancocks]

The Feature

Currently the language has no means of performing basic arithmetic operations. This makes it extremely limiting. There needs to be support for the basic arithmetic operations added into the language.

What needs to be done?

In order to implement this in the language a concept of prefix, postfix and infix operations need to be added to the language as either unary and binary operations. In addition to this support for precedence levels between operations needs to be added, along with the appropriate semantic analysis, optimisation and code generation.

Checklist

• Addition
• Subtraction
• Multiplication
• Division
• Modulo
• Increment
• Decrement
• Operation precedence levels