Adding Julia and C++ examples

julia-to-rust/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "julia-to-rust"
+version = "0.1.0"
+authors = ["timmonfette1 <monfette.timothy@gmail.com>"]
+
+[lib]
+name = "double_input"
+crate-type = ["dylib"]

julia-to-rust/Makefile

@@ -0,0 +1,14 @@
+ifeq ($(shell uname),Darwin)
+    EXT := dylib
+else
+    EXT := so
+endif
+
+all: target/debug/libdouble_input.$(EXT)
+	julia src/main.jl
+
+target/debug/libdouble_input.$(EXT): src/lib.rs Cargo.toml
+	cargo build
+
+clean:
+	rm -rf target

julia-to-rust/src/lib.rs

@@ -0,0 +1,4 @@
+#[no_mangle]
+pub extern fn double_input(input: i32) -> i32 {
+    input * 2
+}

julia-to-rust/src/main.jl

@@ -0,0 +1,7 @@
+input = Int32(10)
+output =  ccall((:double_input, "target/debug/libdouble_input"),
+                        Int32, (Int32,), input)
+
+print(input)
+print(" * 2 = ")
+println(output)