schala-lang/language/src/schala.rs

@@ -251,13 +251,8 @@ fn stage_names() -> Vec<&'static str> {
 
 
 impl ProgrammingLanguageInterface for Schala {
-  fn language_name(&self) -> String {
-    "Schala".to_owned()
-  }
-
-  fn source_file_suffix(&self) -> String {
-    "schala".to_owned()
-  }
+  fn get_language_name(&self) -> String { format!("Schala") }
+  fn get_source_file_suffix(&self) -> String { format!("schala") }
 
   fn run_computation(&mut self, request: ComputationRequest) -> ComputationResponse {
     struct PassToken<'a> {

schala-repl/Cargo.toml

@@ -12,9 +12,9 @@ itertools = "0.10"
 lazy_static = "0.2.8"
 maplit = "*"
 colored = "1.8"
-serde = "1.0"
-serde_derive = "1.0"
-serde_json = "1.0"
+serde = "1.0.91"
+serde_derive = "1.0.91"
+serde_json = "1.0.15"
 phf = "0.7.12"
 includedir = "0.2.0"
 linefeed = "0.6.0"

schala-repl/src/language.rs

@@ -2,10 +2,16 @@ use std::collections::HashSet;
 use std::time;
 
 pub trait ProgrammingLanguageInterface {
-    fn language_name(&self) -> String;
-    fn source_file_suffix(&self) -> String;
+    fn get_language_name(&self) -> String;
+    fn get_source_file_suffix(&self) -> String;
 
-    fn run_computation(&mut self, _request: ComputationRequest) -> ComputationResponse;
+    fn run_computation(&mut self, _request: ComputationRequest) -> ComputationResponse {
+        ComputationResponse {
+            main_output: Err(format!("Computation pipeline not implemented")),
+            global_output_stats: GlobalOutputStats::default(),
+            debug_responses: vec![],
+        }
+    }
 
     fn request_meta(&mut self, _request: LangMetaRequest) -> LangMetaResponse {
         LangMetaResponse::Custom {

schala-repl/src/lib.rs

@@ -44,7 +44,7 @@ pub fn run_noninteractive(filenames: Vec<PathBuf>, languages: Vec<Box<dyn Progra
     let mut language = Box::new(
         languages
             .into_iter()
-            .find(|lang| lang.source_file_suffix() == ext)
+            .find(|lang| lang.get_source_file_suffix() == ext)
             .unwrap_or_else(|| {
                 println!("Extension .{} not recognized", ext);
                 exit(1);

schala-repl/src/repl/help.rs

@@ -48,6 +48,7 @@ fn get_directive_from_commands<'a>(
 
 fn global_help(repl: &mut Repl) -> InterpreterDirectiveOutput {
     let mut buf = String::new();
+    let sigil = repl.interpreter_directive_sigil;
 
     writeln!(
         buf,
@@ -62,7 +63,7 @@ fn global_help(repl: &mut Repl) -> InterpreterDirectiveOutput {
         writeln!(
             buf,
             "{}{} - {}",
-            repl.sigil,
+            sigil,
             directive.get_cmd(),
             directive.get_help()
         )
@@ -74,7 +75,7 @@ fn global_help(repl: &mut Repl) -> InterpreterDirectiveOutput {
     writeln!(
         buf,
         "Language-specific help for {}",
-        lang.language_name()
+        lang.get_language_name()
     )
     .unwrap();
     writeln!(buf, "-----------------------").unwrap();

schala-repl/src/repl/mod.rs

@@ -1,6 +1,5 @@
 use std::collections::HashSet;
 use std::sync::Arc;
-use colored::*;
 
 use crate::language::{
     ComputationRequest, LangMetaRequest, LangMetaResponse, ProgrammingLanguageInterface,
@@ -23,10 +22,7 @@ const OPTIONS_SAVE_FILE: &'static str = ".schala_repl";
 type InterpreterDirectiveOutput = Option<String>;
 
 pub struct Repl {
-    /// If this is the first character typed by a user into the repl, the following
-    /// will be interpreted as a directive to the REPL rather than a command in the 
-    /// running programming language.
-    sigil: char,
+    pub interpreter_directive_sigil: char,
     line_reader: ::linefeed::interface::Interface<::linefeed::terminal::DefaultTerminal>,
     language_states: Vec<Box<dyn ProgrammingLanguageInterface>>,
     options: ReplOptions,
@@ -42,10 +38,10 @@ impl Repl {
     pub fn new(initial_states: Vec<Box<dyn ProgrammingLanguageInterface>>) -> Repl {
         use linefeed::Interface;
         let line_reader = Interface::new("schala-repl").unwrap();
-        let sigil = ':';
+        let interpreter_directive_sigil = ':';
 
         Repl {
-            sigil,
+            interpreter_directive_sigil,
             line_reader,
             language_states: initial_states,
             options: ReplOptions::new(),
@@ -53,9 +49,10 @@ impl Repl {
     }
 
     pub fn run_repl(&mut self) {
-        println!("Schala meta-interpeter version {}", crate::VERSION_STRING);
+        println!("Schala MetaInterpreter version {}", crate::VERSION_STRING);
         println!(
-            "Type {} for help with the REPL", format!("{}help", self.sigil).bright_green().bold()
+            "Type {}help for help with the REPL",
+            self.interpreter_directive_sigil
         );
         self.load_options();
         self.handle_repl_loop();
@@ -71,12 +68,13 @@ impl Repl {
             Ok(options) => {
                 self.options = options;
             }
-          Err(e) => eprintln!("{}",e)
-        }
+            Err(()) => (),
+        };
     }
 
     fn handle_repl_loop(&mut self) {
         use linefeed::ReadResult::*;
+        let sigil = self.interpreter_directive_sigil;
 
         'main: loop {
             macro_rules! match_or_break {
@@ -98,7 +96,7 @@ impl Repl {
             self.line_reader.add_history_unique(input.to_string());
             let mut chars = input.chars().peekable();
             let repl_responses = match chars.nth(0) {
-                Some(ch) if ch == self.sigil => {
+                Some(ch) if ch == sigil => {
                     if chars.peek() == Some(&'{') {
                         let mut buf = String::new();
                         buf.push_str(input.get(2..).unwrap());
@@ -115,8 +113,8 @@ impl Repl {
                         }
                         self.handle_input(&buf)
                     } else {
-                        match self.handle_interpreter_directive(input.get(1..).unwrap()) {
-                            Some(directive_output) => println!("{}", directive_output),
+                        match self.handle_interpreter_directive(input) {
+                            Some(directive_output) => println!("<> {}", directive_output),
                             None => (),
                         }
                         continue;
@@ -133,7 +131,7 @@ impl Repl {
 
     fn update_line_reader(&mut self) {
         let tab_complete_handler =
-            TabCompleteHandler::new(self.sigil, self.get_directives());
+            TabCompleteHandler::new(self.interpreter_directive_sigil, self.get_directives());
         self.line_reader
             .set_completer(Arc::new(tab_complete_handler)); //TODO fix this here
         self.set_prompt(PromptStyle::Normal);
@@ -141,8 +139,8 @@ impl Repl {
 
     fn set_prompt(&mut self, prompt_style: PromptStyle) {
         let prompt_str = match prompt_style {
-            PromptStyle::Normal => ">> ",
-            PromptStyle::Multiline => ">| ",
+            PromptStyle::Normal => ">> ".to_string(),
+            PromptStyle::Multiline => ">| ".to_string(),
         };
 
         self.line_reader.set_prompt(&prompt_str).unwrap();
@@ -156,7 +154,9 @@ impl Repl {
     }
 
     fn handle_interpreter_directive(&mut self, input: &str) -> InterpreterDirectiveOutput {
-        let arguments: Vec<&str> = input.split_whitespace().collect();
+        let mut iter = input.chars();
+        iter.next();
+        let arguments: Vec<&str> = iter.as_str().split_whitespace().collect();
 
         if arguments.len() < 1 {
             return None;

schala-repl/src/repl/repl_options.rs

@@ -2,7 +2,7 @@ use crate::language::DebugAsk;
 
 use std::collections::HashSet;
 use std::fs::File;
-use std::io::{self, Read, Write};
+use std::io::{Read, Write};
 
 #[derive(Serialize, Deserialize)]
 pub struct ReplOptions {
@@ -26,11 +26,11 @@ impl ReplOptions {
             file.write_all(buf.as_bytes())
         });
         if let Err(err) = res {
-            eprintln!("Error saving {} file {}", filename, err);
+            println!("Error saving {} file {}", filename, err);
         }
     }
 
-    pub fn load_from_file(filename: &str) -> Result<ReplOptions, io::Error> {
+    pub fn load_from_file(filename: &str) -> Result<ReplOptions, ()> {
         File::open(filename)
             .and_then(|mut file| {
                 let mut contents = String::new();
@@ -41,5 +41,6 @@ impl ReplOptions {
                 let output: ReplOptions = crate::serde_json::from_str(&contents)?;
                 Ok(output)
             })
+            .map_err(|_| ())
     }
 }