Prepare convert function

src/Tools/cpp_out/src/lib.rs

@@ -1,8 +1,6 @@
-#[cfg(test)]
+use tool_helper::{Input, Output, Result};
-mod tests {
+pub use tool_helper::Error;
-    #[test]
+
-    fn it_works() {
+pub fn convert(_input: Input, _output: Output) -> Result<()> {
-        let result = 2 + 2;
+    Err(Error::new(-1, "Not implemented yet".to_owned()))
-        assert_eq!(result, 4);
+}
-    }
-}

src/Tools/cpp_out/src/main.rs

@@ -14,8 +14,10 @@ struct CommandLine {
 fn run_main() -> tool_helper::Result<()> {
     match CommandLine::try_parse() {
         Ok(cmd) => {
-            let _output = tool_helper::open_output(cmd.input_file)?;
+            let input  = tool_helper::open_input(cmd.input_file)?;
-            return Ok(());
+            let output = tool_helper::open_output(Some(cmd.output_file))?;
+
+            return cpp_out::convert(input, output);
         },
         Err(error) => Err(tool_helper::Error::new(-1, error.to_string()))
     }    
@@ -23,7 +25,7 @@ fn run_main() -> tool_helper::Result<()> {
 
 fn main() {
     match run_main() {
-        Ok(_) => println!("All good"),
+        Ok(_) => (),
         Err(error) => {
             eprintln!("{}", error.text);
             std::process::exit(error.exit_code);

src/Tools/tool_helper/src/lib.rs

@@ -1,6 +1,7 @@
-use std::{boxed::Box, io::Write, path::PathBuf};
+use std::{boxed::Box, io::{Read, Write}, path::PathBuf};
 
 pub type Output    = Box<dyn Write>;
+pub type Input     = Box<dyn Read>;
 pub type Result<T> = std::result::Result<T, Error>;
 
 pub struct Error {
@@ -30,9 +31,16 @@ impl Error {
     }
 }
 
-pub fn open_output(input_file: Option<PathBuf>) -> Result<Output> {
+pub fn open_output(output_file: Option<PathBuf>) -> Result<Output> {
+    match output_file {
+        Some(output_path) => Ok(Box::new(Error::from_io_result(std::fs::File::create(output_path))?)),
+        None              => Ok(Box::new(std::io::stdout())),
+    }
+}
+
+pub fn open_input(input_file: Option<PathBuf>) -> Result<Input> {
     match input_file {
-        Some(input_path) => Ok(Box::new(Error::from_io_result(std::fs::File::create(input_path))?)),
+        Some(input_path) => Ok(Box::new(Error::from_io_result(std::fs::File::open(input_path))?)),
-        None             => Ok(Box::new(std::io::stdout())),
+        None             => Ok(Box::new(std::io::stdin())),
     }
 }