Adds GetChildren method for boundNodes

Upsilon/Binder/BoundExpressions/BoundBinaryExpression.cs

@@ -36,6 +36,12 @@ namespace Upsilon.Binder
             yield return this;
         }
 
+        public override IEnumerable<BoundNode> GetChildren()
+        {
+            yield return LeftExpression;
+            yield return RightExpression;
+        }
+
         public override Type Type { get; }
 
         public BoundBinaryOperator Operator { get; }

Upsilon/Binder/BoundExpressions/BoundFunctionCallExpression.cs

@@ -43,6 +43,15 @@ namespace Upsilon.Binder
             yield return this;
         }
 
+        public override IEnumerable<BoundNode> GetChildren()
+        {
+            yield return Identifier;
+            foreach (var parameter in Parameters)
+            {
+                yield return parameter;
+            }
+        }
+
         public override Type Type { get; }
     }
 }

Upsilon/Binder/BoundExpressions/BoundFunctionExpression.cs

@@ -1,7 +1,8 @@
+using System;
 using System.Collections.Generic;
 using System.Collections.Immutable;
-using Upsilon.BaseTypes;
 using Upsilon.Text;
+using Type = Upsilon.BaseTypes.Type;
 
 namespace Upsilon.Binder
 {
@@ -38,6 +39,15 @@ namespace Upsilon.Binder
             yield return this;
         }
 
+        public override IEnumerable<BoundNode> GetChildren()
+        {
+            foreach (var parameter in Parameters)
+            {
+                yield return parameter;
+            }
+            yield return Block;
+        }
+
         public override Type Type => Type.Function;
         public BoundScope Scope { get; set; }
         public Type ReturnType { get; }

Upsilon/Binder/BoundExpressions/BoundIndexExpression.cs

@@ -33,6 +33,12 @@ namespace Upsilon.Binder
             yield return this;
         }
 
+        public override IEnumerable<BoundNode> GetChildren()
+        {
+            yield return Identifier;
+            yield return Index;
+        }
+
         public override Type Type { get; }
     }
 
@@ -61,6 +67,11 @@ namespace Upsilon.Binder
             yield return this;
         }
 
+        public override IEnumerable<BoundNode> GetChildren()
+        {
+            yield return Expression;
+        }
+
         public override Type Type { get; }
     }
 }

Upsilon/Binder/BoundExpressions/BoundLiteralExpression.cs

@@ -17,6 +17,11 @@ namespace Upsilon.Binder
             yield return this;
         }
 
+        public override IEnumerable<BoundNode> GetChildren()
+        {
+            yield break;
+        }
+
         public override Type Type => Value.Type;
         public ScriptType Value { get; }
     }

Upsilon/Binder/BoundExpressions/BoundTableExpression.cs

@@ -1,8 +1,9 @@
+using System;
 using System.Collections.Generic;
 using System.Collections.Immutable;
-using Upsilon.BaseTypes;
 using Upsilon.Binder.VariableSymbols;
 using Upsilon.Text;
+using Type = Upsilon.BaseTypes.Type;
 
 namespace Upsilon.Binder
 {
@@ -29,6 +30,11 @@ namespace Upsilon.Binder
             yield return this;
         }
 
+        public override IEnumerable<BoundNode> GetChildren()
+        {
+            return Statements;
+        }
+
         public override Type Type => Type.Table;
 
 

Upsilon/Binder/BoundExpressions/BoundUnaryExpression.cs

@@ -17,6 +17,11 @@ namespace Upsilon.Binder
             yield return this;
         }
 
+        public override IEnumerable<BoundNode> GetChildren()
+        {
+            yield return InExpression;
+        }
+
         public override Type Type { get; }
 
         public BoundUnaryExpression(BoundUnaryOperator op, BoundExpression inExpression, Type type, TextSpan span) : base(span)

Upsilon/Binder/BoundExpressions/BoundVariableExpression.cs

@@ -19,6 +19,11 @@ namespace Upsilon.Binder
             yield return Variable;
         }
 
+        public override IEnumerable<BoundNode> GetChildren()
+        {
+            yield break;
+        }
+
         public override Type      Type => Variable.Type;
     }
 }

Upsilon/Binder/BoundNode.cs

@@ -14,5 +14,6 @@ namespace Upsilon.Binder
         public TextSpan Span { get; }
 
         public abstract IEnumerable<BoundNode> GetNodeAtPosition(int linePosition, int characterPosition);
+        public abstract IEnumerable<BoundNode> GetChildren();
     }
 }

Upsilon/Binder/BoundStatements/BoundBlockStatement.cs

@@ -28,6 +28,11 @@ namespace Upsilon.Binder
             yield return this;
         }
 
+        public override IEnumerable<BoundNode> GetChildren()
+        {
+            return Statements;
+        }
+
         public ImmutableArray<BoundStatement> Statements { get; }
     }
 }

Upsilon/Binder/BoundStatements/BoundBreakStatement.cs

@@ -14,5 +14,10 @@ namespace Upsilon.Binder
         {
             yield return this;
         }
+
+        public override IEnumerable<BoundNode> GetChildren()
+        {
+            yield break;
+        }
     }
 }

Upsilon/Binder/BoundStatements/BoundExpressionStatement.cs

@@ -14,6 +14,11 @@ namespace Upsilon.Binder
 
         }
 
+        public override IEnumerable<BoundNode> GetChildren()
+        {
+            yield return Expression;
+        }
+
         public BoundExpressionStatement(BoundExpression expression, TextSpan span):base(span)
         {
             Expression = expression;

Upsilon/Binder/BoundStatements/BoundFunctionAssignmentStatement.cs

@@ -24,5 +24,10 @@ namespace Upsilon.Binder
 
             yield return this;
         }
+
+        public override IEnumerable<BoundNode> GetChildren()
+        {
+            yield return Func;
+        }
     }
 }

Upsilon/Binder/BoundStatements/BoundGenericForStatement.cs

@@ -34,5 +34,11 @@ namespace Upsilon.Binder
             }
             yield return this;
         }
+
+        public override IEnumerable<BoundNode> GetChildren()
+        {
+            yield return BoundEnumerableExpression;
+            yield return Block;
+        }
     }
 }

Upsilon/Binder/BoundStatements/BoundIfStatement.cs

@@ -50,6 +50,14 @@ namespace Upsilon.Binder
             yield return this;
         }
 
+        public override IEnumerable<BoundNode> GetChildren()
+        {
+            yield return Condition;
+            yield return Block;
+            if (NextElseIf != null) yield return NextElseIf;
+            if (ElseStatement != null) yield return ElseStatement;
+        }
+
         public BoundExpressionStatement Condition { get; }
         public BoundBlockStatement Block { get; }
         public BoundIfStatement NextElseIf { get; }
@@ -75,5 +83,10 @@ namespace Upsilon.Binder
             }
             yield return this;
         }
+
+        public override IEnumerable<BoundNode> GetChildren()
+        {
+            yield return Block;
+        }
     }
 }

Upsilon/Binder/BoundStatements/BoundMultiAssignmentStatement.cs

@@ -26,5 +26,10 @@ namespace Upsilon.Binder
 
             yield return this;
         }
+
+        public override IEnumerable<BoundNode> GetChildren()
+        {
+            yield return Assignment;
+        }
     }
 }

Upsilon/Binder/BoundStatements/BoundNumericForStatement.cs

@@ -39,5 +39,13 @@ namespace Upsilon.Binder
                     yield return boundNode;
             yield return this;
         }
+
+        public override IEnumerable<BoundNode> GetChildren()
+        {
+            yield return BoundStart;
+            yield return BoundStop;
+            yield return BoundStep;
+            yield return Block;
+        }
     }
 }

Upsilon/Binder/BoundStatements/BoundReturnStatement.cs

@@ -19,5 +19,10 @@ namespace Upsilon.Binder
                     yield return boundNode;
             yield return this;
         }
+
+        public override IEnumerable<BoundNode> GetChildren()
+        {
+            yield return Expression;
+        }
     }
 }

Upsilon/Binder/BoundStatements/BoundScript.cs

@@ -23,6 +23,11 @@ namespace Upsilon.Binder
             foreach (var boundNode in Statement.GetNodeAtPosition(linePosition, characterPosition)) yield return boundNode;
         }
 
+        public override IEnumerable<BoundNode> GetChildren()
+        {
+            yield return Statement;
+        }
+
         public BoundBlockStatement Statement { get; }
         public BoundScope Scope { get; }
     }

Upsilon/Binder/BoundStatements/BoundTableAssigmentStatement.cs

@@ -26,5 +26,11 @@ namespace Upsilon.Binder
                     yield return boundNode;
             yield return this;
         }
+
+        public override IEnumerable<BoundNode> GetChildren()
+        {
+            yield return TableIndexExpression;
+            yield return Value;
+        }
     }
 }

Upsilon/Binder/BoundStatements/BoundVariableAssignment.cs

@@ -28,5 +28,10 @@ namespace Upsilon.Binder
 
             yield return this;
         }
+
+        public override IEnumerable<BoundNode> GetChildren()
+        {
+            yield return BoundExpression;
+        }
     }
 }

Upsilon/Binder/BoundStatements/BoundWhileStatement.cs

@@ -27,5 +27,11 @@ namespace Upsilon.Binder
                     yield return boundNode;
             yield return this;
         }
+
+        public override IEnumerable<BoundNode> GetChildren()
+        {
+            yield return Condition;
+            yield return Block;
+        }
     }
 }

Upsilon/Binder/BoundVariableSymbol.cs

@@ -22,6 +22,11 @@ namespace Upsilon.Binder
             yield return this;
         }
 
+        public override IEnumerable<BoundNode> GetChildren()
+        {
+            yield break;
+        }
+
         public override Type Type => VariableSymbol.Type;
     }
 }