public override LuaSyntaxNode VisitTryStatement(TryStatementSyntax node)
{
LuaInvocationExpressionSyntax tryInvocationExpression = new LuaInvocationExpressionSyntax(LuaIdentifierNameSyntax.Try);
LuaTryAdapterExpressionSyntax tryBlockFunctionExpress = new LuaTryAdapterExpressionSyntax();
PushFunction(tryBlockFunctionExpress);
var block = (LuaBlockSyntax)node.Block.Accept(this);
PopFunction();
tryBlockFunctionExpress.AddStatements(block.Statements);
tryInvocationExpression.AddArgument(tryBlockFunctionExpress);
if (node.Catches.Count > 0)
{
var catchesExpress = VisitTryCatchesExpress(node.Catches);
tryInvocationExpression.AddArgument(catchesExpress);
}
else
{
tryInvocationExpression.AddArgument(LuaIdentifierNameSyntax.Nil);
}
if (node.Finally != null)
{
var finallyfunctionExpress = (LuaFunctionExpressionSyntax)node.Finally.Accept(this);
tryInvocationExpression.AddArgument(finallyfunctionExpress);
}
return(BuildCheckReturnInvocationExpression(tryInvocationExpression, node));
}
private LuaTryAdapterExpressionSyntax VisitTryCatchesExpress(SyntaxList <CatchClauseSyntax> catches)
{
LuaTryAdapterExpressionSyntax functionExpress = new LuaTryAdapterExpressionSyntax();
PushFunction(functionExpress);
var temp = GetTempIdentifier(catches.First());
functionExpress.CatchTemp = temp;
functionExpress.AddParameter(temp);
LuaIfStatementSyntax ifStatement = null;
bool hasCatchRoot = false;
foreach (var catchNode in catches)
{
bool isRootExceptionDeclaration = false;
LuaExpressionSyntax ifCondition = null;
if (catchNode.Filter != null)
{
ifCondition = (LuaExpressionSyntax)catchNode.Filter.Accept(this);
}
if (catchNode.Declaration != null)
{
var typeName = (LuaIdentifierNameSyntax)catchNode.Declaration.Type.Accept(this);
if (typeName.ValueText != "System.Exception")
{
var mathcTypeInvocation = new LuaInvocationExpressionSyntax(LuaIdentifierNameSyntax.Is, temp, typeName);
if (ifCondition != null)
{
ifCondition = new LuaBinaryExpressionSyntax(ifCondition, LuaSyntaxNode.Tokens.And, mathcTypeInvocation);
}
else
{
ifCondition = mathcTypeInvocation;
}
}
else
{
if (!catchNode.Declaration.Identifier.IsKind(SyntaxKind.None))
{
isRootExceptionDeclaration = true;
}
hasCatchRoot = true;
}
}
else
{
hasCatchRoot = true;
}
var block = (LuaBlockSyntax)catchNode.Block.Accept(this);
if (ifCondition != null)
{
LuaBlockSyntax body;
if (ifStatement == null)
{
ifStatement = new LuaIfStatementSyntax(ifCondition);
body = ifStatement.Body;
}
else
{
LuaElseIfStatementSyntax elseIfStatement = new LuaElseIfStatementSyntax(ifCondition);
body = elseIfStatement.Body;
ifStatement.ElseIfStatements.Add(elseIfStatement);
}
if (catchNode.Declaration != null && !catchNode.Declaration.Identifier.IsKind(SyntaxKind.None))
{
var variableDeclarator = (LuaVariableDeclaratorSyntax)catchNode.Declaration.Accept(this);
variableDeclarator.Initializer = new LuaEqualsValueClauseSyntax(temp);
body.Statements.Add(new LuaLocalVariableDeclaratorSyntax(variableDeclarator));
}
body.Statements.AddRange(block.Statements);
}
else
{
if (isRootExceptionDeclaration)
{
var variableDeclarator = (LuaVariableDeclaratorSyntax)catchNode.Declaration.Accept(this);
variableDeclarator.Initializer = new LuaEqualsValueClauseSyntax(temp);
block.Statements.Insert(0, new LuaLocalVariableDeclaratorSyntax(variableDeclarator));
}
if (ifStatement != null)
{
LuaElseClauseSyntax elseClause = new LuaElseClauseSyntax();
elseClause.Body.Statements.AddRange(block.Statements);
ifStatement.Else = elseClause;
}
else
{
functionExpress.AddStatements(block.Statements);
}
break;
}
}
if (ifStatement != null)
{
if (!hasCatchRoot)
{
Contract.Assert(ifStatement.Else == null);
LuaMultipleReturnStatementSyntax rethrowStatement = new LuaMultipleReturnStatementSyntax();
rethrowStatement.Expressions.Add(LuaIdentifierNameSyntax.One);
rethrowStatement.Expressions.Add(temp);
LuaBlockSyntax block = new LuaBlockSyntax();
block.Statements.Add(rethrowStatement);
LuaElseClauseSyntax elseClause = new LuaElseClauseSyntax();
elseClause.Body.Statements.AddRange(block.Statements);
ifStatement.Else = elseClause;
}
functionExpress.AddStatement(ifStatement);
}
PopFunction();
return(functionExpress);
}