private JsBlockStatement CompileCatchClause(LocalResolveResult catchVariable, CatchClause catchClause, bool isCatchAll, bool isOnly) {
SetRegion(catchClause.GetRegion());
JsStatement variableDeclaration = null;
if (!catchClause.VariableNameToken.IsNull) {
JsExpression compiledAssignment;
if (isCatchAll) // If this is the only handler we need to construct the exception
compiledAssignment = isOnly ? _runtimeLibrary.MakeException(JsExpression.Identifier(_variables[catchVariable.Variable].Name), this) : JsExpression.Identifier(_variables[catchVariable.Variable].Name);
else
compiledAssignment = _runtimeLibrary.Downcast(JsExpression.Identifier(_variables[catchVariable.Variable].Name), _compilation.FindType(KnownTypeCode.Exception), _resolver.Resolve(catchClause.Type).Type, this);
variableDeclaration = JsStatement.Var(_variables[((LocalResolveResult)_resolver.Resolve(catchClause.VariableNameToken)).Variable].Name, compiledAssignment);
}
var result = CreateInnerCompiler().Compile(catchClause.Body);
if (variableDeclaration != null)
result = JsStatement.Block(new[] { variableDeclaration }.Concat(result.Statements));
return result;
}
