Added constants to the UI and Computation Engine

app/imports/parser/parseTree/ArrayNode.js

@@ -33,4 +33,7 @@ export default class ArrayNode extends ParseNode {
     fn(this);
     this.values.forEach(value => value.traverse(fn));
   }
+  replaceChildren(fn){
+    this.values = this.values.map(node => node.replaceNodes(fn));
+  }
 }

app/imports/parser/parseTree/CallNode.js

@@ -54,6 +54,9 @@ export default class CallNode extends ParseNode {
     fn(this);
     this.args.forEach(arg => arg.traverse(fn));
   }
+  replaceChildren(fn){
+    this.args = this.args.map(arg => arg.replaceNodes(fn));
+  }
 }
 
 function castArgsToType({fn, scope, context, args, type}){

app/imports/parser/parseTree/IfNode.js

@@ -34,4 +34,9 @@ export default class IfNode extends ParseNode {
     this.consequent.traverse(fn);
     this.alternative.traverse(fn);
   }
+  replaceChildren(fn){
+    this.condition = this.condition.replaceNodes(fn);
+    this.consequent = this.consequent.replaceNodes(fn);
+    this.alternative = this.alternative.replaceNodes(fn);
+  }
 }

app/imports/parser/parseTree/IndexNode.js

@@ -29,4 +29,8 @@ export default class IndexNode extends ParseNode {
     this.array.traverse(fn);
     this.index.traverse(fn);
   }
+  replaceChildren(fn){
+    this.array = this.array.replaceNodes(fn);
+    this.index = this.index.replaceNodes(fn);
+  }
 }

app/imports/parser/parseTree/NotOperatorNode.js

@@ -28,4 +28,7 @@ export default class NotOperatorNode extends ParseNode {
     fn(this);
     this.right.traverse(fn);
   }
+  replaceChildren(fn){
+    this.right = this.right.replaceNodes(fn);
+  }
 }

app/imports/parser/parseTree/OperatorNode.js

@@ -60,4 +60,8 @@ export default class OperatorNode extends ParseNode {
     this.left.traverse(fn);
     this.right.traverse(fn);
   }
+  replaceChildren(fn){
+    this.left = this.left.replaceNodes(fn);
+    this.right = this.right.replaceNodes(fn);
+  }
 }

app/imports/parser/parseTree/ParenthesisNode.js

@@ -23,4 +23,7 @@ export default class ParenthesisNode extends ParseNode {
     fn(this);
     this.content.traverse(fn);
   }
+  replaceChildren(fn){
+    this.content = this.content.replaceNodes(fn);
+  }
 }

app/imports/parser/parseTree/ParseNode.js

@@ -30,4 +30,14 @@ export default class ParseNode {
   traverse(fn){
     fn(this);
   }
+  // replace nodes, only replace nodes if fn returns a value
+  replaceNodes(fn){
+    let newNode = fn(this);
+    if (newNode) {
+      return newNode;
+    } else {
+      if (this.replaceChildren) this.replaceChildren(fn)
+      return this;
+    }
+  }
 }

app/imports/parser/parseTree/RollNode.js

@@ -64,4 +64,8 @@ export default class RollNode extends ParseNode {
     this.left.traverse(fn);
     this.right.traverse(fn);
   }
+  replaceChildren(fn){
+    this.left = this.left.replaceNodes(fn);
+    this.right = this.right.replaceNodes(fn);
+  }
 }

app/imports/parser/parseTree/UnaryOperatorNode.js

@@ -34,4 +34,7 @@ export default class UnaryOperatorNode extends ParseNode {
     fn(this);
     this.right.traverse(fn);
   }
+  replaceChildren(fn){
+    this.right = this.right.replaceNodes(fn);
+  }
 }