114 lines
4.3 KiB
C#
114 lines
4.3 KiB
C#
//-----------------------------------------------------------------------
|
|
//-----------------------------------------------------------------------
|
|
// file="ExpSwitchNode.cs"
|
|
// Project: StgSharp
|
|
// AuthorGroup: Nitload Space
|
|
// Copyright (c) Nitload Space. All rights reserved.
|
|
//
|
|
// Permission is hereby granted, free of charge, to any person
|
|
// obtaining a copy of this software and associated documentation
|
|
// files (the “Software”), to deal in the Software without restriction,
|
|
// including without limitation the rights to use, copy, modify, merge,
|
|
// publish, distribute, sublicense, and/or sell copies of the Software,
|
|
// and to permit persons to whom the Software is furnished to do so,
|
|
// subject to the following conditions:
|
|
//
|
|
// The above copyright notice and
|
|
// this permission notice shall be included in all copies
|
|
// or substantial portions of the Software.
|
|
//
|
|
// THE SOFTWARE IS PROVIDED “AS IS”,
|
|
// WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
|
|
// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
|
|
// IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
|
|
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
|
|
// ARISING FROM, OUT OF OR IN CONNECTION WITH
|
|
// THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
//
|
|
//-----------------------------------------------------------------------
|
|
//-----------------------------------------------------------------------
|
|
using System;
|
|
using System.Collections.Generic;
|
|
using System.Text;
|
|
|
|
namespace StgSharp.Script.Express
|
|
{
|
|
public class ExpSwitchNode : ExpBaseNode
|
|
{
|
|
|
|
private Dictionary<ExpBaseNode, ExpBaseNode> _cases;
|
|
private ExpBaseNode _default;
|
|
private ExpBaseNode _target;
|
|
|
|
public ExpSwitchNode(
|
|
string name,
|
|
ExpSchema context,
|
|
ExpBaseNode target,
|
|
ExpBaseNode defaultCase,
|
|
params (ExpBaseNode label, ExpBaseNode op)[] cases )
|
|
: base( name, context )
|
|
{
|
|
_target = target;
|
|
_default = defaultCase;
|
|
_cases = new Dictionary<ExpBaseNode, ExpBaseNode>();
|
|
foreach( (ExpBaseNode label, ExpBaseNode op ) item in cases ) {
|
|
if( item.op == null ) {
|
|
_cases.Add( item.label, null! );
|
|
} else {
|
|
_cases.Add( item.label, item.op );
|
|
}
|
|
}
|
|
}
|
|
|
|
public ExpBaseNode this[ ExpBaseNode index ]
|
|
{
|
|
get
|
|
{
|
|
if( _cases.TryGetValue( index, out ExpBaseNode? ret ) ) {
|
|
return ret;
|
|
}
|
|
return _default;
|
|
}
|
|
}
|
|
|
|
public override ExpBaseNode Left => throw new NotImplementedException();
|
|
|
|
public override ExpBaseNode Right => throw new NotImplementedException();
|
|
|
|
public override IExpElementSource EqualityTypeConvert => null!;
|
|
|
|
public void AddOperationToDefault( ExpBaseNode expressionRoot )
|
|
{
|
|
if( expressionRoot != null ) {
|
|
_default.AppendNode( expressionRoot );
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Adds an expression to certain <see langword="case" />. The added expression will be run
|
|
/// at last.
|
|
/// </summary>
|
|
/// <param name="label"> Label of case to add operation </param>
|
|
/// <param name="expressionRoot"> Root token of the expression to be added. </param>
|
|
/// <exception cref="ExpCaseNotFoundException"> Cannot fine the case label in current witch expression. </exception>
|
|
public void AppendOperationToCase(
|
|
ExpBaseNode label,
|
|
ExpBaseNode expressionRoot )
|
|
{
|
|
AssertSchemaInclude( expressionRoot );
|
|
if( _cases.TryGetValue( label, out ExpBaseNode? op ) ) {
|
|
op.AppendNode( expressionRoot );
|
|
} else {
|
|
throw new ExpCaseNotFoundException( this, label );
|
|
}
|
|
}
|
|
|
|
public bool ContainsCase( ExpBaseNode token )
|
|
{
|
|
return _cases.ContainsKey( token );
|
|
}
|
|
|
|
}
|
|
}
|