136 lines
4.6 KiB
C#
136 lines
4.6 KiB
C#
//-----------------------------------------------------------------------
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//-----------------------------------------------------------------------
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// file="ExpSwitchNode.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 System;
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using System.Collections.Frozen;
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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 class ExpSwitchNode : ExpNode
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{
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private ExpNode _default;
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private ExpNode _target;
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private FrozenDictionary<ExpNode, ExpNode> _cases;
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public ExpSwitchNode(
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Token source,
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ExpNode target,
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ExpNode defaultCase,
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params (ExpNode label, ExpNode op)[] cases )
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: base( source )
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{
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_target = target;
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_default = defaultCase;
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Dictionary<ExpNode, ExpNode> casesDic = new Dictionary<ExpNode, ExpNode>();
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foreach( (ExpNode label, ExpNode op ) item in cases )
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{
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if( item.op == null )
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{
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casesDic.Add( item.label, null! );
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} else
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{
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casesDic.Add( item.label, item.op );
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}
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}
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_cases = casesDic.ToFrozenDictionary();
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string str = @"switch( {0} ){";
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StringBuilder codeFormatBuilder = new StringBuilder();
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codeFormatBuilder.AppendLine( str );
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for( int i = 0; i < casesDic.Count; i++ )
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{
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int index = i * 2 + 1;
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codeFormatBuilder.AppendLine(
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$$"""
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case {{{index}}}:
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{{{index + 1}}}
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break;
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""" );
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}
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CodeConvertTemplate = codeFormatBuilder.ToString();
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}
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public ExpSwitchNode(
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Token source,
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ExpNode target,
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ExpNode defaultCase,
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IDictionary<ExpNode, ExpNode> cases )
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: base( source )
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{
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_target = target;
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_default = defaultCase;
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_cases = cases.ToFrozenDictionary();
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string str = @"switch( {0} ){";
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StringBuilder codeFormatBuilder = new StringBuilder();
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codeFormatBuilder.AppendLine( str );
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for( int i = 0; i < cases.Count; i++ )
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{
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int index = i * 2 + 1;
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codeFormatBuilder.AppendLine(
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$$"""
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case {{{index}}}:
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{{{index + 1}}}
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break;
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""" );
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}
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CodeConvertTemplate = codeFormatBuilder.ToString();
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}
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public ExpNode this[ ExpNode index ]
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{
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get
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{
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if( _cases.TryGetValue( index, out ExpNode? ret ) ) {
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return ret;
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}
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return _default;
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}
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}
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public override ExpNode Left => Empty;
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public override ExpNode Right => Empty;
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public override IExpElementSource EqualityTypeConvert => null!;
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public bool ContainsCase( ExpNode token )
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{
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return _cases.ContainsKey( token );
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}
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}
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}
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