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C custom datatypes mapped to C datatypes grouped under a single struct


C custom datatypes mapped to C datatypes grouped under a single struct

By : K Cosmo
Date : October 21 2020, 06:10 AM
I wish this help you You may assign a unique ID number to each data type, and have both sides of the message passing line agree on it. Apparently you cannot compare data types, i.e. if (data_type == MPI_INT), but you can compare IDs.
code :


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How can I trim string property datatypes from database char datatypes in Fluent NHibernate

How can I trim string property datatypes from database char datatypes in Fluent NHibernate


By : user2615322
Date : March 29 2020, 07:55 AM
With these it helps You can create an implementation of NHibernate.UserTypes.IUserType that will trim the whitespace when fetched from the database and re-pad it when going back to the database.
In your fluent mapping, you just add .CustomType where T is your IUserType implementation.
code :
     value
Built-in datatypes versus User defined datatypes in C++

Built-in datatypes versus User defined datatypes in C++


By : babaloomer
Date : March 29 2020, 07:55 AM
Hope that helps
While initializing a built-in datatype variable, the variable also HAS to be "built from dust" . So, are there also constructors for built in types?
code :
int some_function (int some argument) {
  int index;
  ...
}
What is the difference b/w primitive datatypes and derived datatypes in XML schema world?

What is the difference b/w primitive datatypes and derived datatypes in XML schema world?


By : user3352071
Date : March 29 2020, 07:55 AM
should help you out Start by looking at the complete type system of XML Schema. The following picture shows almost the whole type system, except for anySimpleType (all types below are simple types), and arbitrary, user-defined complex types.
code :
[Definition:]  Primitive datatypes are those that are not defined in terms of other datatypes; they exist ab initio.
[Definition:]  Derived datatypes are those that are defined in terms of other datatypes.
Conversion of anonymous XML datatypes to named datatypes

Conversion of anonymous XML datatypes to named datatypes


By : Justin Girard
Date : March 29 2020, 07:55 AM
To fix this issue Yes, the following XSD that reflects your named type conversion is correct:
code :
<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
           elementFormDefault="qualified">

  <xs:element name="textSelection">
    <xs:complexType>
      <xs:sequence>
        <xs:element name="path" type="xs:string"/>
        <xs:element name="color" type="color" minOccurs="0"/>
        <xs:element name="contentRef" type="textSelection" minOccurs="0"/>
      </xs:sequence>
    </xs:complexType>
  </xs:element>

  <xs:complexType name="textSelection">
    <xs:sequence>
      <xs:element name="path" type="xs:string"/>
      <xs:element name="color" type="color" minOccurs="0"/>
      <xs:element name="contentRef" type="xs:string" minOccurs="0"/>
    </xs:sequence>
  </xs:complexType>

  <xs:simpleType name="color">
    <xs:restriction base="xs:string">
      <xs:enumeration value="yellow"/>
      <xs:enumeration value="green"/>
      <xs:enumeration value="light blue"/>
      <xs:enumeration value="orange"/>
      <xs:enumeration value="fucsia"/>
    </xs:restriction>
  </xs:simpleType>
</xs:schema>
How do I safely put two variable sized datatypes (structs) in a single struct?

How do I safely put two variable sized datatypes (structs) in a single struct?


By : tomy
Date : March 29 2020, 07:55 AM
I wish this helpful for you A C structure can be variable-size only in the sense that it may contain a "flexible array member" as its last member. C forbids such a structure type from being the type of any structure member or array element, though GCC permits that as an extension.
Even if GCC (or clang) accepted your declaration, I doubt it would mean what you think it means. Every member of a structure has a fixed offset relative to the beginning of the structure, determined statically at compile time. As a result, your msg_t cannot provide sufficient space for arbitrary hdr.f, and quite possibly it provides no space at all, especially if you enable structure packing. Thus, accessing hdr.f of a msg_t could easily access the message data, which I suppose is not what you expect.
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