public static ContractRequires GetLastRequiresFor(this ICSharpFunctionDeclaration functionDeclaration,
string parameterName)
{
var parameters = functionDeclaration.DeclaredElement.Parameters
.Select(p => p.ShortName).TakeWhile(paramName => paramName != parameterName)
.Reverse().ToList();
// Creating lookup where key is argument name, and the value is statements.
var requiresStatements =
functionDeclaration
.GetRequires()
.ToList();
/*.SelectMany(x => x.ArgumentNames.Select(a => new {Statement = x, ArgumentName = a}))
* .ToLookup(x => x.ArgumentName, x => x.Statement)*/
;
// Looking for the last usage of the parameters in the requires statements
foreach (var p in parameters)
{
// TODO: it seems terrible!!! and ugly!
var precondition = requiresStatements
.LastOrDefault(r => r.ChecksForNotNull(pa =>
pa.CompareReferenceArgument(ra => ra.BaseArgumentName == p)));
if (precondition != null)
{
return(precondition);
}
}
return(null);
}
private ICSharpStatement GetLastRequiresStatementIfAny(ICSharpFunctionDeclaration functionDeclaration)
{
return functionDeclaration.GetRequires().Select(r => r.CSharpStatement).LastOrDefault();
}
private ICSharpStatement GetLastRequiresStatementIfAny(ICSharpFunctionDeclaration functionDeclaration)
{
return(functionDeclaration.GetRequires().Select(r => r.CSharpStatement).LastOrDefault());
}