144 lines
4.1 KiB
C#
144 lines
4.1 KiB
C#
//-----------------------------------------------------------------------
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//-----------------------------------------------------------------------
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// file="_ExpNode.cs"
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// Project: StgSharp
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// AuthorGroup: Nitload Space
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// Copyright (c) Nitload Space. All rights reserved.
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//
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// Permission is hereby granted, free of charge, to any person
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// obtaining a copy of this software and associated documentation
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// files (the “Software”), to deal in the Software without restriction,
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// including without limitation the rights to use, copy, modify, merge,
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// publish, distribute, sublicense, and/or sell copies of the Software,
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// and to permit persons to whom the Software is furnished to do so,
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// subject to the following conditions:
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//
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// The above copyright notice and
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// this permission notice shall be included in all copies
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// or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED “AS IS”,
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// WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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// IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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// ARISING FROM, OUT OF OR IN CONNECTION WITH
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// THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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//-----------------------------------------------------------------------
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//-----------------------------------------------------------------------
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using CommunityToolkit.HighPerformance.Buffers;
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using System;
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using System.Collections.Generic;
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using System.Text;
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namespace StgSharp.Script.Express
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{
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public abstract class ExpNode : IASTNode<ExpNode, IExpElementSource>
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{
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protected internal ExpNodeFlag _nodeFlag;
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protected internal string _name;
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protected ExpNode( string name )
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{
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_name = name;
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Next = this;
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Previous = this;
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}
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public bool IsNumber
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{
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get { return ( _nodeFlag | ExpNodeFlag.BuiltinType_Number ) != 0; }
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}
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public abstract ExpNode Left
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{
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get;
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}
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public static ExpNode Empty
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{
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get => ExpEmptyNode._only;
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}
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public ExpNode Next
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{
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get;
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set;
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}
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public abstract ExpNode Right
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{
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get;
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}
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public ExpNode Previous
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{
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get;
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set;
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}
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public abstract IExpElementSource EqualityTypeConvert
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{
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get;
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}
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public long NodeFlag => ( long )_nodeFlag;
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public string CodeConvertTemplate
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{
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get;
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init;
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}
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public string Name => _name;
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public virtual void AppendNode( ExpNode nextToken )
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{
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Next.Previous = nextToken;
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nextToken.Next = Next;
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Next = nextToken;
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Next.Previous = this;
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}
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public ExpNodeNextEnumerator GetEnumerator()
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{
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return new ExpNodeNextEnumerator( this );
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}
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public static bool IsNullOrEmpty( ExpNode node )
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{
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return node == ExpEmptyNode._only || node == null;
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}
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public static bool VerifyTypeConvertable( ExpNode left, ExpNode right )
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{
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IExpElementSource tLeft = left.EqualityTypeConvert,
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tRight = right.EqualityTypeConvert;
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if( tLeft == null || tRight == null ) {
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return false;
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}
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return tLeft.IsConvertable( tRight );
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}
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private class ExpEmptyNode : ExpNode
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{
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internal static readonly ExpEmptyNode _only = new();
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public ExpEmptyNode() : base( string.Empty ) { }
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public override ExpInstantiableElement EqualityTypeConvert => ExpInstantiableElement.Void;
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public override ExpNode Left => _only;
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public override ExpNode Right => _only;
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}
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}
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}
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