Ivana Ivanovska 7580df8b8a [Carbon/C++ interop] Add support for int function params (#5197) ...

Added support for `int` function parameters. Currently only
pass-by-value is supported.

```c++
// hello_int.h;

auto foo_int(int a, int b) -> int;
```

```c++
// hello_int.cpp

#include "hello_int.h"
#include <cstdio>

auto foo_int(int a, int b) -> int {
    printf("a = %i \n", a);
    printf("b = %i \n", b);
    return a + b;
}
```
```c++
// main.carbon

library "Main";

import Cpp library "hello_int.h";
import Core library "io";

fn Carbon_foo(b: i32) {
  Core.Print(b);
}

fn Run() -> i32 {
  Carbon_foo(Cpp.foo_int(2, 8));
  return 0;
}
```

```
$ clang -c hello_int.cpp
$ bazel-bin/toolchain/carbon compile main.carbon
$ bazel-bin/toolchain/carbon link hello_int.o main.o --output=demo
$ ./demo
a = 2 
b = 8 
10
```

Part of  #5064

2025-04-09 11:38:39 +00:00

..

no_prelude

[Carbon/C++ interop] Add support for int function params (#5197)

2025-04-09 11:38:39 +00:00

function_decl.carbon

[Carbon/C++ interop] Add support for int function params (#5197)

2025-04-09 11:38:39 +00:00