M core/interpreter.nim → core/interpreter.nim

@@ -1,5 +1,9 @@ 
 import streams, strutils, critbits
-import types, parser, ../vendor/linenoise
+import 
+  types, 
+  parser,
+  scope,
+  ../vendor/linenoise
 
 const ERRORS: array [MinError, string] = [
   "A system error occurred",

A core/scope.nim

@@ -0,0 +1,20 @@ 
+import critbits, strutils
+import 
+  types
+
+
+proc lookupSymbol*(scope: ref MinScope, key: string): MinOperator =
+  if scope.symbols.hasKey(key):
+    return scope.symbols[key]
+  elif scope.parent != nil:
+    return scope.parent.lookupSymbol(key)
+
+proc lookupSigil*(scope: ref MinScope, key: string): MinOperator =
+  if scope.sigils.hasKey(key):
+    return scope.sigils[key]
+  elif scope.parent != nil:
+    return scope.parent.lookupSigil(key)
+
+proc lookupLocal*(scope: ref MinScope, key: string): MinValue =
+  if scope.locals.hasKey(key):
+    return scope.locals[key]