87 lines
2.4 KiB
C#
87 lines
2.4 KiB
C#
//
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// IcarusExpression.cs - the abstract base class from which all ICARUS expression implementations derive
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//
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// Author:
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// Michael Becker <alcexhim@gmail.com>
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//
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// Copyright (c) 2011-2020 Mike Becker's Software
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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using System;
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using UniversalEditor.ObjectModels.Icarus.Expressions;
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namespace UniversalEditor.ObjectModels.Icarus
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{
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/// <summary>
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/// The abstract base class from which all ICARUS expression implementations derive.
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/// </summary>
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public abstract class IcarusExpression : ICloneable
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{
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public class IcarusExpressionCollection
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: System.Collections.ObjectModel.Collection<IcarusExpression>
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{
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}
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public abstract object Clone();
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protected abstract bool GetValueInternal(ref object value);
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public object GetValue(object defaultValue = null)
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{
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object val = defaultValue;
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bool ret = GetValueInternal(ref val);
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if (ret) return val;
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return defaultValue;
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}
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public T GetValue<T>(T defaultValue = default(T))
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{
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object val = defaultValue;
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bool ret = GetValueInternal(ref val);
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if (ret) return (T)val;
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return defaultValue;
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}
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public static IcarusExpression Parse(string parm)
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{
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if (parm.StartsWith("\"") && parm.EndsWith("\""))
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{
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return new IcarusConstantExpression(parm.Substring(1, parm.Length - 2));
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}
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else if (parm.StartsWith("$") && parm.EndsWith("$"))
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{
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return new IcarusConstantExpression(parm);
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}
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else
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{
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switch (parm)
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{
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case "FLOAT":
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{
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return new IcarusConstantExpression(IcarusVariableDataType.Float);
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}
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case "STRING":
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{
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return new IcarusConstantExpression(IcarusVariableDataType.String);
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}
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case "VECTOR":
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{
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return new IcarusConstantExpression(IcarusVariableDataType.Vector);
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}
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}
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}
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return null;
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}
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}
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}
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