System Functions brush-up (#334)

libs/natparse/src/main/java/org/amshove/natparse/natural/IAbsOperandNode.java

@@ -1,6 +1,4 @@
 package org.amshove.natparse.natural;
 
-public interface IAbsOperandNode extends IOperandNode
-{
-	IOperandNode parameter(); // TODO: (type-check)
-}
+public interface IAbsOperandNode extends IMathFunctionOperandNode
+{}

libs/natparse/src/main/java/org/amshove/natparse/natural/IAtnOperandNode.java

@@ -0,0 +1,4 @@
+package org.amshove.natparse.natural;
+
+public interface IAtnOperandNode extends IMathFunctionOperandNode
+{}

libs/natparse/src/main/java/org/amshove/natparse/natural/IAverOperandNode.java

@@ -0,0 +1,4 @@
+package org.amshove.natparse.natural;
+
+public interface IAverOperandNode extends IMathFunctionOperandNode
+{}

libs/natparse/src/main/java/org/amshove/natparse/natural/ICosOperandNode.java

@@ -0,0 +1,4 @@
+package org.amshove.natparse.natural;
+
+public interface ICosOperandNode extends IMathFunctionOperandNode
+{}

libs/natparse/src/main/java/org/amshove/natparse/natural/ICountOperandNode.java

@@ -1,6 +1,4 @@
 package org.amshove.natparse.natural;
 
-public interface ICountOperandNode extends IOperandNode
-{
-	IVariableReferenceNode variable();
-}
+public interface ICountOperandNode extends IMathFunctionOperandNode
+{}

libs/natparse/src/main/java/org/amshove/natparse/natural/IDataType.java

@@ -16,6 +16,16 @@ public interface IDataType
 
 	boolean hasDynamicLength();
 
+	default boolean isNumericFamily()
+	{
+		return format() == NUMERIC || format() == PACKED || format() == FLOAT || format() == INTEGER;
+	}
+
+	default boolean isAlphaNumericFamily()
+	{
+		return format() == ALPHANUMERIC || format() == UNICODE || format() == BINARY;
+	}
+
 	/**
 	 * Determines if this type fits into the given type. Implicit conversion is taken into account.</br>
 	 * <strong>This does not compare by byte size</strong>

libs/natparse/src/main/java/org/amshove/natparse/natural/IExpOperandNode.java

@@ -0,0 +1,4 @@
+package org.amshove.natparse.natural;
+
+public interface IExpOperandNode extends IMathFunctionOperandNode
+{}

libs/natparse/src/main/java/org/amshove/natparse/natural/IFracOperandNode.java

@@ -1,6 +1,4 @@
 package org.amshove.natparse.natural;
 
-public interface IFracOperandNode extends IOperandNode
-{
-	IOperandNode parameter(); // TODO: (type-check)
-}
+public interface IFracOperandNode extends IMathFunctionOperandNode
+{}

libs/natparse/src/main/java/org/amshove/natparse/natural/IIntOperandNode.java

@@ -1,6 +1,4 @@
 package org.amshove.natparse.natural;
 
-public interface IIntOperandNode extends IOperandNode
-{
-	IVariableReferenceNode variable(); // TODO: (type-check)
-}
+public interface IIntOperandNode extends IMathFunctionOperandNode
+{}

libs/natparse/src/main/java/org/amshove/natparse/natural/ILogOperandNode.java

@@ -1,6 +1,4 @@
 package org.amshove.natparse.natural;
 
-public interface ILogOperandNode extends IOperandNode
-{
-	IOperandNode parameter();
-}
+public interface ILogOperandNode extends IMathFunctionOperandNode
+{}

libs/natparse/src/main/java/org/amshove/natparse/natural/IMathFunctionOperandNode.java

@@ -0,0 +1,6 @@
+package org.amshove.natparse.natural;
+
+public interface IMathFunctionOperandNode extends IOperandNode
+{
+	IOperandNode parameter();
+}

libs/natparse/src/main/java/org/amshove/natparse/natural/IMaxOperandNode.java

@@ -0,0 +1,4 @@
+package org.amshove.natparse.natural;
+
+public interface IMaxOperandNode extends IProcessingLoopFunctionNode
+{}

libs/natparse/src/main/java/org/amshove/natparse/natural/IMinOperandNode.java

@@ -0,0 +1,4 @@
+package org.amshove.natparse.natural;
+
+public interface IMinOperandNode extends IProcessingLoopFunctionNode
+{}

libs/natparse/src/main/java/org/amshove/natparse/natural/IOldOperandNode.java

@@ -1,6 +1,4 @@
 package org.amshove.natparse.natural;
 
-public interface IOldOperandNode extends IOperandNode
-{
-	IOperandNode operand();
-}
+public interface IOldOperandNode extends IProcessingLoopFunctionNode
+{}

libs/natparse/src/main/java/org/amshove/natparse/natural/IPosNode.java → libs/natparse/src/main/java/org/amshove/natparse/natural/IPosOperandNode.java

@@ -1,6 +1,6 @@
 package org.amshove.natparse.natural;
 
-public interface IPosNode extends IOperandNode
+public interface IPosOperandNode extends IOperandNode
 {
 	IVariableReferenceNode positionOf();
 }

libs/natparse/src/main/java/org/amshove/natparse/natural/IProcessingLoopFunctionNode.java

@@ -0,0 +1,6 @@
+package org.amshove.natparse.natural;
+
+public interface IProcessingLoopFunctionNode extends IOperandNode
+{
+	IOperandNode parameter();
+}

libs/natparse/src/main/java/org/amshove/natparse/natural/ISignOperandNode.java

@@ -1,6 +1,4 @@
 package org.amshove.natparse.natural;
 
 public interface ISignOperandNode extends IOperandNode
-{
-	IOperandNode parameter(); // TODO: (type-check)
-}
+{}

libs/natparse/src/main/java/org/amshove/natparse/natural/ISinOperandNode.java

@@ -0,0 +1,4 @@
+package org.amshove.natparse.natural;
+
+public interface ISinOperandNode extends IOperandNode
+{}

libs/natparse/src/main/java/org/amshove/natparse/natural/ISortKeyOperandNode.java

@@ -0,0 +1,6 @@
+package org.amshove.natparse.natural;
+
+public interface ISortKeyOperandNode extends IOperandNode
+{
+	IVariableReferenceNode variable();
+}

libs/natparse/src/main/java/org/amshove/natparse/natural/ISqrtOperandNode.java

@@ -0,0 +1,4 @@
+package org.amshove.natparse.natural;
+
+public interface ISqrtOperandNode extends IMathFunctionOperandNode
+{}

libs/natparse/src/main/java/org/amshove/natparse/natural/ISumOperandNode.java

@@ -1,6 +1,4 @@
 package org.amshove.natparse.natural;
 
-public interface ISumOperandNode extends IOperandNode
-{
-	IVariableReferenceNode variable(); // TODO (type-check)
-}
+public interface ISumOperandNode extends IMathFunctionOperandNode
+{}

libs/natparse/src/main/java/org/amshove/natparse/natural/ITanOperandNode.java

@@ -0,0 +1,4 @@
+package org.amshove.natparse.natural;
+
+public interface ITanOperandNode extends IMathFunctionOperandNode
+{}

libs/natparse/src/main/java/org/amshove/natparse/natural/ITotalOperandNode.java

@@ -1,6 +1,4 @@
 package org.amshove.natparse.natural;
 
-public interface ITotalOperandNode extends IOperandNode
-{
-	IVariableReferenceNode variable();
-}
+public interface ITotalOperandNode extends IMathFunctionOperandNode
+{}

libs/natparse/src/main/java/org/amshove/natparse/natural/IValOperandNode.java

@@ -2,5 +2,5 @@
 
 public interface IValOperandNode extends IOperandNode
 {
-	IOperandNode operand(); // TODO (type-check)
+	IOperandNode parameter();
 }

libs/natparse/src/main/java/org/amshove/natparse/parsing/AbsOperandNode.java

@@ -1,9 +1,9 @@
 package org.amshove.natparse.parsing;
 
-import org.amshove.natparse.natural.IAbsOperandNode;
+import org.amshove.natparse.natural.IMathFunctionOperandNode;
 import org.amshove.natparse.natural.IOperandNode;
 
-class AbsOperandNode extends BaseSyntaxNode implements IAbsOperandNode
+class AbsOperandNode extends BaseSyntaxNode implements IMathFunctionOperandNode
 {
 	private IOperandNode parameter;