Add SourceReference

schala-lang/language/src/lib.rs

@@ -42,13 +42,14 @@ mod eval;
 #[derive(ProgrammingLanguageInterface)]
 #[LanguageName = "Schala"]
 #[SourceFileExtension = "schala"]
-#[PipelineSteps(tokenizing, parsing(compact,expanded,trace), symbol_table, typechecking, ast_reducing, eval)]
+#[PipelineSteps(load_source, tokenizing, parsing(compact,expanded,trace), symbol_table, typechecking, ast_reducing, eval)]
 #[DocMethod = get_doc]
 #[HandleCustomInterpreterDirectives = handle_custom_interpreter_directives]
 /// All bits of state necessary to parse and execute a Schala program are stored in this struct
 /// `state` represents the execution state for the AST-walking interpreter, the other fields
 /// should be self-explanatory.
 pub struct Schala {
+  source_reference: SourceReference,
   state: eval::State<'static>,
   symbol_table: Rc<RefCell<symbol_table::SymbolTable>>,
   type_context: typechecking::TypeContext<'static>,
@@ -70,6 +71,7 @@ impl Schala {
   fn new_blank_env() -> Schala {
     let symbols = Rc::new(RefCell::new(symbol_table::SymbolTable::new()));
     Schala {
+      source_reference: SourceReference::new(),
       symbol_table: symbols.clone(),
       state: eval::State::new(symbols),
       type_context: typechecking::TypeContext::new(),
@@ -87,6 +89,11 @@ impl Schala {
   }
 }
 
+//TODO rejigger the signature of these methods so you don't awkwardly have the input in the middle
+fn load_source<'a>(_handle: &mut Schala, input: &'a str, comp: Option<&mut UnfinishedComputation>) -> Result<&'a str, String> {
+  Ok(input)
+}
+
 fn tokenizing(_handle: &mut Schala, input: &str, comp: Option<&mut UnfinishedComputation>) -> Result<Vec<tokenizing::Token>, String> {
   let tokens = tokenizing::tokenize(input);
   comp.map(|comp| {
@@ -175,3 +182,16 @@ fn eval(handle: &mut Schala, input: reduced_ast::ReducedAST, comp: Option<&mut U
   eval_output
 }
 
+struct SourceReference {
+
+}
+
+impl SourceReference {
+  fn new() -> SourceReference {
+    SourceReference { }
+  }
+
+  fn load_new_source(&mut self, source: String) {
+
+  }
+}