Constants

[gdotdesign]

This PR will add constants to the language (and resolve #169).

Constants can be added to a store, module or component using the following syntax:

module Math {
  constant PI = 3.141592653589793
}

• constants can be accessed like variables inside the scope of the entity which defined them
• constants can be accessed from the outside using the following syntax Math:PI

At this point I refrained from adding global constants, it can be added later if there is need.

[kennethnym]

I still feel like the single colon syntax is a bit confusing..

Edit: how about

Module.myContant

?

[Namek]

I'd prefer const. It's typical for most languages and involves a bit less typing.

[gdotdesign]

how about Module.myContant

With the current implementation we cannot do that because it conflicts with type ids (since they start with an uppercase letter and can contain dots .).

I'd prefer const. It's typical for most languages and involves a bit less typing.

I'm fine with that.