132 lines
5.1 KiB
C#
132 lines
5.1 KiB
C#
//-----------------------------------------------------------------------
|
|
//-----------------------------------------------------------------------
|
|
// file="ExpSyntaxAnalyzer.CaseOf.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.Diagnostics;
|
|
using System.Linq;
|
|
using System.Text;
|
|
using System.Threading.Tasks;
|
|
|
|
using ExpKeyword = StgSharp.Script.Express.ExpressCompile.Keyword;
|
|
|
|
namespace StgSharp.Script.Express
|
|
{
|
|
public partial class ExpSyntaxAnalyzer
|
|
{
|
|
|
|
private bool AppendToken_CaseOf( Token t )
|
|
{
|
|
Token op;
|
|
ExpNode root;
|
|
switch( t.Value )
|
|
{
|
|
case ExpKeyword.Case:
|
|
CaseOfStateCache state = new CaseOfStateCache( t );
|
|
_cache.CurrentDepthMark.StateCache = state;
|
|
state.CurrentState = t.Value;
|
|
return true;
|
|
case ExpKeyword.Of:
|
|
state = _cache.StateOfCurrentDepth<CaseOfStateCache>();
|
|
while( _cache.TryPopOperator( out op ) ) {
|
|
ConvertAndPushOneOperator( op );
|
|
}
|
|
_cache.PopOperand( out _, out root );
|
|
state.CaseExpression = root;
|
|
state.CurrentState = t.Value;
|
|
return true;
|
|
case ":":
|
|
state = _cache.StateOfCurrentDepth<CaseOfStateCache>();
|
|
if( state.CurrentState != ExpKeyword.Of && state.CurrentState !=
|
|
ExpKeyword.Otherwise )
|
|
{
|
|
root = _cache.PackAllStatements();
|
|
state.CloseCurrentCase( root );
|
|
}
|
|
while( _cache.TryPopOperator( out op ) ) {
|
|
ConvertAndPushOneOperator( op );
|
|
}
|
|
if( !_cache.PopOperand( out _, out root ) )
|
|
{
|
|
// sth wrong, case expression cannot generate;
|
|
}
|
|
state.CurrentCase = root;
|
|
return true;
|
|
case ExpKeyword.Otherwise:
|
|
state = _cache.StateOfCurrentDepth<CaseOfStateCache>();
|
|
root = _cache.PackAllStatements();
|
|
state.CloseCurrentCase( root );
|
|
state.CurrentState = t.Value;
|
|
return true;
|
|
case ExpKeyword.EndCase:
|
|
state = _cache.StateOfCurrentDepth<CaseOfStateCache>();
|
|
root = _cache.PackAllStatements();
|
|
state.CloseCurrentCase( root );
|
|
root = new ExpSwitchNode(
|
|
state.Begin, state.CaseExpression, state.DefaultCase, state.Cases );
|
|
_cache.DecreaseDepth();
|
|
_cache.StatementsInDepth.Push( root );
|
|
return true;
|
|
default:
|
|
AppendToken_common( t );
|
|
return true;
|
|
}
|
|
}
|
|
|
|
private class CaseOfStateCache : ICompileDepthState
|
|
{
|
|
|
|
public CaseOfStateCache( Token t )
|
|
{
|
|
Begin = t;
|
|
}
|
|
|
|
public Dictionary<ExpNode, ExpNode> Cases { get; } = new Dictionary<ExpNode, ExpNode>();
|
|
|
|
public ExpNode CaseExpression { get; set; }
|
|
|
|
public ExpNode DefaultCase { get; set; }
|
|
|
|
public ExpNode CurrentCase { get; set; }
|
|
|
|
public string CurrentState { get; set; }
|
|
|
|
public Token Begin { get; init; }
|
|
|
|
public void CloseCurrentCase( ExpNode root )
|
|
{
|
|
Cases.Add( CurrentCase, root );
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
}
|