delete variable or property, closes #155 (ms 2.0)

static/js/languages/microscript/v2/compiler.coffee

@@ -74,6 +74,8 @@ class Compiler
       return @compileDo(statement)
     else if statement instanceof Program.Sleep
       return @compileSleep(statement)
+    else if statement instanceof Program.Delete
+      return @compileDelete(statement)
     else if true
       console.info statement
       throw "Not implemented"
@@ -655,6 +657,25 @@ class Compiler
       @routine.MUL sleep
     @routine.SLEEP sleep
 
+  compileDelete:(del)->
+    if del.field instanceof Program.Variable
+      @routine.LOAD_THIS del
+      @routine.LOAD_VALUE del.field.identifier,del
+      @routine.DELETE del 
+      return
+    else
+      @compile del.field.expression
+
+      chain = del.field.chain
+
+      for i in [0..chain.length-1] by 1
+        @compile chain[i]
+        if i < chain.length-1
+          @routine.LOAD_PROPERTY del
+
+      @routine.DELETE del
+      return
+
   exec:(context)->
     @processor = new Processor()
     @processor.load @routine

static/js/languages/microscript/v2/parser.coffee

@@ -221,6 +221,7 @@ class @Parser
       when Token.TYPE_EVERY then @parseEvery token
       when Token.TYPE_DO then @parseDo token
       when Token.TYPE_SLEEP then @parseSleep token
+      when Token.TYPE_DELETE then @parseDelete token
 
       else
         @tokenizer.pushBack token
@@ -659,3 +660,11 @@ class @Parser
         @tokenizer.pushBack token
 
     return new Program.Sleep sleep,delay,multiplier
+
+  parseDelete:(del)->
+    v = @parseExpression()
+
+    if not v? or (v not instanceof Program.Variable and v not instanceof Program.Field)
+      @error "expecting variable name or property access after keyword `delete`"
+    else
+      return new Program.Delete del,v