public override ICodeNode VisitCatchClause(CatchClause node)
{
// We first visit the body and the filter
node.Body = (BlockStatement)base.Visit(node.Body);
if (node.Filter == null || !(node.Filter is BlockStatement))
{
return(node);
}
currentCatchClause = node;
node.Filter = (Statement)base.Visit(node.Filter);
currentCatchClause = null;
VariableDeclarationExpression variableDeclaration;
Expression filterExpression;
bool matchSucceed = CatchClausesFilterPattern.TryMatch(node.Filter as BlockStatement, out variableDeclaration, out filterExpression);
if (!matchSucceed)
{
if (variableDeclaration == null || variableDeclaration.ExpressionType.FullName == Constants.Object ||
!CatchClausesFilterPattern.TryMatchMethodStructure(node.Filter as BlockStatement))
{
throw new NotSupportedException("Unsupported structure of filter clause.");
}
CreateMethod(node, variableDeclaration, out filterExpression);
}
this.context.MethodContext.VariablesToNotDeclare.Add(variableDeclaration.Variable);
// If the pattern matches then there is no additional method and the variable declaration is used as is.
// If the pattern doesn't match - we use the expressions only, because if we don't, the result is
// two expressions (one in the catch variable and one in the generated method) with the same instructions.
if (matchSucceed)
{
node.Variable = variableDeclaration;
}
else
{
node.Variable = variableDeclaration.CloneExpressionOnly() as VariableDeclarationExpression;
}
node.Type = variableDeclaration.ExpressionType;
node.Filter = new ExpressionStatement(filterExpression);
return(node);
}
public override ICodeNode VisitCatchClause(CatchClause node)
{
// We first visit the body and the filter
node.Body = (BlockStatement)base.Visit(node.Body);
if (node.Filter == null || !(node.Filter is BlockStatement))
{
return(node);
}
currentCatchClause = node;
node.Filter = (Statement)base.Visit(node.Filter);
currentCatchClause = null;
VariableDeclarationExpression variableDeclaration;
Expression filterExpression;
bool matchSucceed = CatchClausesFilterPattern.TryMatch(node.Filter as BlockStatement, out variableDeclaration, out filterExpression);
if (!matchSucceed)
{
if (variableDeclaration == null || variableDeclaration.ExpressionType.FullName == Constants.Object ||
!CatchClausesFilterPattern.TryMatchMethodStructure(node.Filter as BlockStatement))
{
throw new NotSupportedException("Unsupported structure of filter clause.");
}
CreateMethod(node, variableDeclaration, out filterExpression);
}
this.context.MethodContext.VariablesToNotDeclare.Add(variableDeclaration.Variable);
node.Variable = variableDeclaration;
node.Type = variableDeclaration.ExpressionType;
node.Filter = new ExpressionStatement(filterExpression);
return(node);
}
public override ICodeNode VisitCatchClause(CatchClause node)
{
node.set_Body((BlockStatement)this.Visit(node.get_Body()));
if (node.get_Filter() == null || node.get_Filter() as BlockStatement == null)
{
return(node);
}
this.currentCatchClause = node;
node.set_Filter((Statement)this.Visit(node.get_Filter()));
this.currentCatchClause = null;
stackVariable27 = CatchClausesFilterPattern.TryMatch(node.get_Filter() as BlockStatement, out V_0, out V_1);
if (!stackVariable27)
{
if (V_0 == null || String.op_Equality(V_0.get_ExpressionType().get_FullName(), "System.Object") || !CatchClausesFilterPattern.TryMatchMethodStructure(node.get_Filter() as BlockStatement))
{
throw new NotSupportedException("Unsupported structure of filter clause.");
}
this.CreateMethod(node, V_0, out V_1);
}
dummyVar0 = this.context.get_MethodContext().get_VariablesToNotDeclare().Add(V_0.get_Variable());
if (!stackVariable27)
{
node.set_Variable(V_0.CloneExpressionOnly() as VariableDeclarationExpression);
}
else
{
node.set_Variable(V_0);
}
node.set_Type(V_0.get_ExpressionType());
node.set_Filter(new ExpressionStatement(V_1));
return(node);
}