public static Task <ContractBlock> CreateForMethodAsync(BaseMethodDeclarationSyntax methodDeclaration, SemanticModel semanticModel, CancellationToken token = default(CancellationToken))
{
Contract.Requires(methodDeclaration != null);
Contract.Requires(semanticModel != null);
Contract.Ensures(Contract.Result <ContractBlock>() != null);
var contractStatements =
methodDeclaration.DescendantNodes()
.OfType <ExpressionStatementSyntax>()
.Select(e => CodeContractAssertion.Create(e, semanticModel))
.Where(x => x.HasValue)
.Select(x => x.Value)
.ToList();
var preconditions = contractStatements.OfType <IPrecondition>().ToList();
var postconditions = contractStatements.OfType <ContractEnsures>().ToList();
return(Task.FromResult(new ContractBlock(preconditions, postconditions)));
}