From 61972410eabcff354e501bb65ae5166214ca2469 Mon Sep 17 00:00:00 2001
From: greg <greg.shuflin@protonmail.com>
Date: Tue, 19 Mar 2019 19:12:32 -0700
Subject: [PATCH] Functionality to request/respond to meta items

---
 schala-lang/language/src/lib.rs |  2 +-
 schala-repl/src/language.rs     | 20 ++++++++++++++++++++
 schala-repl/src/lib.rs          |  2 +-
 3 files changed, 22 insertions(+), 2 deletions(-)

diff --git a/schala-lang/language/src/lib.rs b/schala-lang/language/src/lib.rs
index 8b82cb8..94da9a6 100644
--- a/schala-lang/language/src/lib.rs
+++ b/schala-lang/language/src/lib.rs
@@ -21,7 +21,7 @@ use std::cell::RefCell;
 use std::rc::Rc;
 
 use itertools::Itertools;
-use schala_repl::{ProgrammingLanguageInterface, ComputationRequest, ComputationResponse, GlobalOutputStats};
+use schala_repl::{ProgrammingLanguageInterface, ComputationRequest, ComputationResponse, LangMetaRequest, LangMetaResponse, GlobalOutputStats};
 
 macro_rules! bx {
   ($e:expr) => { Box::new($e) }
diff --git a/schala-repl/src/language.rs b/schala-repl/src/language.rs
index 989c3e5..fd7bcf5 100644
--- a/schala-repl/src/language.rs
+++ b/schala-repl/src/language.rs
@@ -15,6 +15,10 @@ pub trait ProgrammingLanguageInterface {
   fn repl_request(&self, repl_request: String) -> String {
     format!("<<No custom interpreter directives or help info specified>>")
   }
+
+  fn request_meta(&mut self, _request: LangMetaRequest) -> LangMetaResponse {
+    LangMetaResponse::Custom { kind: format!("not-implemented"), value: format!("") }
+  }
 }
 
 pub struct ComputationRequest<'a> {
@@ -38,6 +42,22 @@ pub struct DebugResponse {
   value: String
 }
 
+pub enum LangMetaRequest {
+  StageNames,
+  Custom {
+    kind: String,
+    value: String
+  }
+}
+
+pub enum LangMetaResponse {
+  StageNames(Vec<String>),
+  Custom {
+    kind: String,
+    value: String
+  }
+}
+
 #[derive(Default, Debug)]
 pub struct GlobalOutputStats {
   total_duration: Option<time::Duration>,
diff --git a/schala-repl/src/lib.rs b/schala-repl/src/lib.rs
index 5f65185..029a807 100644
--- a/schala-repl/src/lib.rs
+++ b/schala-repl/src/lib.rs
@@ -24,7 +24,7 @@ mod repl;
 mod language;
 mod webapp;
 
-pub use language::{ProgrammingLanguageInterface, ComputationRequest, ComputationResponse, GlobalOutputStats};
+pub use language::{ProgrammingLanguageInterface, ComputationRequest, ComputationResponse, LangMetaRequest, LangMetaResponse, GlobalOutputStats};
 
 include!(concat!(env!("OUT_DIR"), "/static.rs"));
 const VERSION_STRING: &'static str = "0.1.0";