private Expression BuildToNullableExpression(Expression sourceLocalName, Type sourceType, Type resultType)
{
var resultElementType = resultType.GetNullableElementType();
var resultValue = _ctx.CreateExpression(sourceLocalName, sourceType, resultElementType);
return(Expression.TypeAs(resultValue, resultType));
}
private MethodCallExpression BuildResultCollectionExpression(Expression sourceLocalName, Type sourceType, Type resultType)
{
var sourceElementType = sourceType.GetCollectionElementType();
var resultElementType = resultType.GetCollectionElementType();
var methodInfo = SelectMethodInfo.MakeGenericMethod(sourceElementType, resultElementType);
var selector = _ctx.CreateExpression(sourceElementType, resultElementType);
return(Expression.Call(methodInfo, sourceLocalName, selector));
}
private IEnumerable <MemberBinding> BuildMemberInitList(Expression sourceLocalName, IEnumerable <ITypeMemberInfo> sourceMembers, IEnumerable <ITypeMemberInfo> resultMembers)
{
var sourceMemberNames = sourceMembers.Select(p => p.Name);
var resultMemberNames = resultMembers.Select(p => p.Name);
var commonMemberNames = resultMemberNames.Intersect(sourceMemberNames);
foreach (var memberName in commonMemberNames)
{
var sourceMemberInfo = sourceMembers.First(p => p.Name == memberName);
var sourceMemberExpr = ResolveSourceMemberExpression(sourceLocalName, sourceMemberInfo);
var resultMemberInfo = resultMembers.First(p => p.Name == memberName);
var resultValueExpr = _ctx.CreateExpression(sourceMemberExpr, sourceMemberInfo.Type, resultMemberInfo.Type);
yield return(Expression.Bind(resultMemberInfo.OriginalInfo, resultValueExpr));
}
}