Repl module "default_js_slang" function support (#1363)

* Repl module "default_js_slang" function support

My module "repl" have a function called "default_js_slang" that allows students to run code in js-slang side through my module. This function need support from js-slang side to get the evaluation function and context in "sourceRunner.ts".

* Fix lint errors

---------

Co-authored-by: Martin Henz <henz@comp.nus.edu.sg>

Author: larrywang0701

src/runner/sourceRunner.ts

@@ -138,6 +138,15 @@ async function runNative(
   let sourceMapJson: RawSourceMap | undefined
   try {
     appendModulesToContext(transpiledProgram, context)
+
+    // Repl module "default_js_slang" function support (Wang Zihan)
+    if (context.moduleContexts['repl'] !== undefined) {
+      ;(context.moduleContexts['repl'] as any).js_slang = {}
+      ;(context.moduleContexts['repl'] as any).js_slang.sourceFilesRunner = sourceFilesRunner
+      if ((context.moduleContexts['repl'] as any).js_slang.context === undefined)
+        (context.moduleContexts['repl'] as any).js_slang.context = context
+    }
+
     switch (context.variant) {
       case Variant.GPU:
         transpileToGPU(transpiledProgram)