Basic AST types

[MaxDesiatov]

• [x] Simple literal expressions
• [x] Ternary expressions
• [x] Identifier expressions
• [x] Function applications
• [x] Variable and constant declarations
• [ ] Closure expressions
• [ ] Value members of struct declarations
• [ ] Compound literal expressions (arrays, dictionaries, string interpolations)
• [ ] Operators (represented as simple function applications in AST)
• [ ] Simple function declarations with concrete types
• [ ] protocol declarations
• [ ] Generic function declarations with protocol constraints
• [ ] as operator
• [ ] as! operator
• [ ] as? operator
• [ ] Explicit signatures
• [ ] Existential types
• [ ] Static members of struct declarations
• [ ] enum declarations