Implement ternary operator support

[alexdovzhanyn]

Currently we support control flow operations such as if / else if / else. You can assign variables to the result of control flow operations like so:

x<String> = if (1 == 1) 'Yes' else 'No'

This works fine, but it would be nice to add some syntactic sugar so we could also do:

x<String> = 1 == 1 ? 'Yes' : 'No'

In order to allow for this, we need to update the parser to recognize this as a control flow node.

• Update the lexer to allow for ? tokens
• Update the parser to turn ternary operations into ControlFlowNodes
• Add tests to the lexer, parser, and codegen to verify the changes

[syfuuu]

@alexdovzhanyn I can work on this. Please assign this to me.

[alexdovzhanyn]

@syfuuu You got it!

[syfuuu]

Hey, Are you sure x<String> = if (1 == 1) 'Yes' else 'No' works? its giving me segmentation fault. I already worked on lexer but parser is but tricky. Try to understand how it works incase of if/else. Is there any communication channel for discussing things related to this project?

[alexdovzhanyn]

@syfuuu Yeah it should work, though there may be a bug. It looks like currently if (1 == 1) 'Yes' else 'No' gets parsed correctly, however it fails if you try to assign it to a variable like x<String> = if (1 == 1) 'Yes' else 'No'. I'll make a separate bug ticket for that. But for now you can build the ternary based on if (1 == 1) 'Yes' else 'No'.

We have a discord channel here, feel free to hop in.

[alexdovzhanyn]

@syfuuu I've made another issue to track that bug here: #37