Function Declarations

Your Task

Implement function declaration and function call parsing.

Requirements

1. Parse function declarations:

   • Return type (int, void, char, etc.)
   • Function name
   • Parameter list (can be empty)
   • Function body (block statement)

2. Create AST nodes:

   • NODE_FUNC_DECL: Contains name, params, return type, body
   • NODE_PARAM: Contains type and name
   • NODE_CALL: Function call expression

3. Parse function calls:

   • name(arg1, arg2, ...)
   • Zero or more arguments
   • Arguments are expressions

4. Handle edge cases:

   • Empty parameter list: void foo()
   • Void return type: void foo()
   • No parameters notation: int foo(void)
   • Function declarations without body (prototypes)

Success Criteria

• Parse: int main() { return 0; }
• Parse: int add(int a, int b) { return a + b; }
• Parse: result = add(x, y + 1);