The compiler can currently handle the include keyword.

Skipping the Lexer, the parser can find and replace the include statement
as long as it is on a line by itself.

examples/compile.rs

@@ -25,9 +25,20 @@ pub const TEST_OUTPUT_FILENAME: &'static str = "test.rs";
 ///
 pub fn main()
 {
+   let mut compiler: Compiler;
+   let mut include: PathBuf;
    let mut input: PathBuf;
    let mut output: PathBuf;
 
+   // Create a new compiler.
+   compiler = Compiler::new();
+
+   // Add the resource directory as an include directory
+   // for the compiler.
+   include = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
+   include.push(RESOURCE_DIR);
+   compiler.register_include_dir(&include);
+
    // Get the input file to test with. It is in the
    // resources directory.
    input = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
@@ -41,5 +52,5 @@ pub fn main()
    output.push(TEST_OUTPUT_FILENAME);
 
    println!("Compiling {:?} to {:?}", input, output);
-   Compiler::compile(input, output);
+   compiler.compile(input, output);
 }