CanonSharp/CanonSharp.Pascal/SyntaxTree/SyntaxNodeBase.cs

namespace CanonSharp.Pascal.SyntaxTree;

public enum SyntaxNodeType
{
    BinaryOperator,
    UnaryOperator,
    IntegerValue,
    FloatValue,
    BooleanValue,
    CharValue,
    Variable,
    Type,
    Assign,
    Block,
    Constant,
    VariableDeclaration,
    If,
    While,
    For,
    ProcedureCall,
    Parameter,
    SubprogramHead,
    SubprogramBody,
    SubProgram,
    ProgramBody,
    ProgramHead,
    Program
}

public abstract class SyntaxNodeBase
{
    public abstract SyntaxNodeType NodeType { get; }

    public T Convert<T>() where T : SyntaxNodeBase
    {
        if (this is not T result)
        {
            throw new InvalidCastException($"Can't convert {NodeType} to target node.");
        }

        return result;
    }
}