Added Rust support to the Fun core. (0.38.0)

src/rust/Cargo.toml

@@ -0,0 +1,16 @@
+[package]
+name = "hello-c-world"
+version = "0.1.0"
+edition = "2021"
+
+[lib]
+crate-type = ["staticlib"]
+
+[profile.release]
+panic = "abort"
+# Optimize for minimal size
+opt-level = "z"
+codegen-units = 1
+lto = true
+# If Cargo is new enough, this strips symbols from Rust objects
+strip = "symbols"

src/rust/src/lib.rs

@@ -0,0 +1,44 @@
+/*
+ * This file is part of the Fun programming language.
+ * https://fun-lang.xyz/
+ *
+ * Copyright 2025 Johannes Findeisen <you@hanez.org>
+ * Licensed under the terms of the Apache-2.0 license.
+ * https://opensource.org/license/apache-2-0
+ *
+ * Added: 2026-01-27
+ */
+
+#![no_std]
+
+#[repr(C)]
+pub struct Vm;
+
+extern "C" {
+    fn vm_pop_i64(vm: *mut Vm) -> i64;
+    fn vm_push_i64(vm: *mut Vm, v: i64);
+}
+
+// Submodule with additional Rust VM math ops (exported via C ABI)
+pub mod vm;
+
+#[no_mangle]
+pub extern "C" fn fun_op_radd(vm: *mut Vm) -> i32 {
+    unsafe {
+        let b = vm_pop_i64(vm);
+        let a = vm_pop_i64(vm);
+        vm_push_i64(vm, a + b);
+    }
+    0
+}
+
+#[no_mangle]
+pub extern "C" fn fun_rust_get_string() -> *const core::ffi::c_char {
+    b"Hello from Rust ops!\0".as_ptr() as *const _
+}
+
+// Minimal panic handler for no_std; abort behavior requested via Cargo profile
+#[panic_handler]
+fn panic(_info: &core::panic::PanicInfo) -> ! {
+    loop {}
+}