Zig/C FFI

[giann]

| `extern struct` because it has to match C ABI
zigdef `
    const Person = extern struct {
        age: usize,
        name: [:0]const u8 name,

        fn hello(self: Person) void;
    };

    fm mul(a: u32, b: u32) u32;
`;

| No different from an buzz object instanciation in syntax
Person person = Person{
    age = 12,
    name = "Joe",
};

person.hello();

print("{person}"); | -> struct Person: 0xef231b

mul(123, 243);

• [x] Use std.zig.Ast to parse zig declarations
• [x] Generate corresponding buzz types
• [x] Use MIR to generate wrapper functions that does the binding
• Handle C ABI types
  • [x] Numbers
  • [x] Pointers
  • [x] Structs
  • [ ] Union
• [x] https://github.com/buzz-language/buzz/issues/138
• [x] https://github.com/buzz-language/buzz/issues/21

Later:

• [ ] Parse C declarations (use something like chibicc or tinycc ?)
• [ ] Generate corresponding zig types