(if) without else case is now supported.

2019-07-15 17:16:09 +09:00
parent 5c6e78eab5
commit ea0d4c3b4a
2 changed files with 3 additions and 4 deletions
--- a/desktop/sources/scripts/lisp.js
+++ b/desktop/sources/scripts/lisp.js
@@ -53,7 +53,7 @@ function Lisp (input, lib) {
      if (interpret(input[1], context)) {
        return interpret(input[2], context)
      }
-      return interpret(input[3], context)
+      return input[3] ? interpret(input[3], context) : []
    }
  }

@@ -66,7 +66,7 @@ function Lisp (input, lib) {
  }

  const interpret = function (input, context) {
-    if (!input) { return null }
+    if (!input) { console.warn('error', context.scope); return null }

    if (context === undefined) {
      return interpret(input, new Context(lib))