using Microsoft.CodeAnalysis.CSharp.Syntax;

namespace Ariadne.Generator
{
    public enum PassageCallKind
    {
        Discard,
        Assign,
        Declare,
        Return,
    }

    /// <summary>
    /// A statement that calls a passage and does nothing else but take its value, if it has one.
    /// </summary>
    public class PassageCall
    {
        public readonly PassageCallKind Kind;

        public readonly InvocationExpressionSyntax Invocation;

        /// <summary>
        /// Holds the left side of an assignment, or null.
        /// </summary>
        public readonly ExpressionSyntax Target;

        /// <summary>
        /// Holds the variable a declaration declares, or null.
        /// </summary>
        public readonly VariableDeclaratorSyntax Declarator;

        public PassageCall(PassageCallKind kind, InvocationExpressionSyntax invocation, ExpressionSyntax target,
            VariableDeclaratorSyntax declarator)
        {
            Kind = kind;
            Invocation = invocation;
            Target = target;
            Declarator = declarator;
        }
    }
}