Rewrote project in Rust

src/builder/cpp_file_builder.rs

@@ -0,0 +1,40 @@
+use std::io::{Result, Write};
+
+use super::FileBuilder;
+
+pub struct CppBuilder;
+
+impl FileBuilder for CppBuilder {
+    fn extension(&mut self) -> &str {
+        "hpp"
+    }
+
+    fn write_top_level(&mut self, output: &mut dyn Write) -> Result<()> {
+        write!(output, "#pragma once\n\n")?;
+        write!(output, "#include <cstddef>\n\n")?;
+
+        Ok(())
+    }
+
+    fn write_namespace(&mut self, output: &mut dyn Write, name: &str) -> Result<()> {
+        write!(output, "namespace {} {{\n", name)?;
+
+        Ok(())
+    }
+
+    fn write_variable(&mut self, output: &mut dyn Write, name: &str, value: usize) -> Result<()> {
+        write!(
+            output,
+            "    constexpr std::ptrdiff_t {} = {:#X};\n",
+            name, value
+        )?;
+
+        Ok(())
+    }
+
+    fn write_closure(&mut self, output: &mut dyn Write, eof: bool) -> Result<()> {
+        write!(output, "{}", if eof { "}" } else { "}\n\n" })?;
+
+        Ok(())
+    }
+}