c3c/test/test_suite/from_docs/examples_macro_function.c3t

// #target: macos-x64
module example;
import std::io;

macro foo(a, b)
{
    return a(b);
}

fn int square(int x)
{
    return x * x;
}

fn int test()
{
    int a = 2;
    int b = 3;
    return foo(&square, 2) + a + b; // 9
    // return foo(square, 2) + a + b;
    // Error the symbol "square" cannot be used as an argument.
}

/* #expect: example.ll

define i32 @example_square(i32 %0) #0 {
entry:
  %mul = mul i32 %0, %0
  ret i32 %mul
}

define i32 @example_test() #0 {
entry:
  %a = alloca i32, align 4
  %b = alloca i32, align 4
  %a1 = alloca ptr, align 8
  %b2 = alloca i32, align 4
  store i32 2, ptr %a, align 4
  store i32 3, ptr %b, align 4
  store ptr @example_square, ptr %a1, align 8
  store i32 2, ptr %b2, align 4
  %0 = load ptr, ptr %a1, align 8
  %1 = load i32, ptr %b2, align 4
  %2 = call i32 %0(i32 %1)
  %3 = load i32, ptr %a, align 4
  %add = add i32 %2, %3
  %4 = load i32, ptr %b, align 4
  %add3 = add i32 %add, %4
  ret i32 %add3
}