Are the following equivalent in C? // #1 struct myStruct { int id; char value; }; typedef struct myStruct Foo; // #2 typedef struct { int id; char value; } Foo; If not, which one should I use and when? (Yes, I have seen this and this.) ...
Possible Duplicate: Typedef pointers a good idea? I've seen this oddity in many APIs I have used: typedef type_t *TYPE; My point is that declaring a variable of type TYPE will not make it clear that in fact a pointer is declared. Do you, like me, think that this brings a lot of confusion? Is this meant to enforce encapsula...
Given: typedef type-declaration synonym; I can see how: typedef long unsigned int size_t; declares size_t as a synonym for long unsigned int, however I (know it does but) can't see exactly how: typedef int (*F)(size_t, size_t); declares F as a synonym for pointer to function (size_t, size_t) returning int typedef's two operands...
hey people kindly tell me if the following declaration is correct? if it is then kindly explain typedef char HELLO[5]; HELLO name; now what datatype is name? [as in a character,integer etc] i came to know that name will be an array of strings but when i run the following programme i get error #include<stdio.h> typedef char HEL...
typedef enum { kA = 0, kB, kC, kD, kE, kF } index; @interface myViewController : UITableViewController<UIAlertViewDelegate> { index enumIndex; } Hi, guys. I declare index which is composed by typedef enum. But I didn't found code like that. and If that code useful, does not need to release ? I don't und...
I'm trying to define a CompositeUserType to handle a specific type in my JPA/Hibernate app. I have a CompositeUserType called ApplicationMessageType that is designed to handle my mapping. According to what I've read, I should be able to create a package-info.java class in my domain hierarchy that contains the TypeDefs. Mine looks like ...
I had code that looked like this: enum EEventID { eEvent1, eEvent2, ... eEventN }; And that got reviewed and changed to typedef enum { eEvent1, eEvent2, ... eEventN } EEventID; What is the difference between the two? Why make the change? When I looked at this question, the only mention of typedefs got downvoted. ...
Typedef is very useful for portable names, tag names (typedef struct foo Foo;) and keeping complicated (function) declarations readable (typedef int (*cmpfunc)(const void *, const void *);). But are there situations in C where a typedef is really truly needed? Where you cannot accomplish the same by simple writing out the derived type. ...
is there a typedef keyword in PHP such that I can do something like: typedef struct { } aStructure; or typedef enum { aType1, aType2, } aType; ...
Why would I want to do this? typedef struct Frame_s { int x; int y; int z; } Frame_t; Also if I want to create an object what do I use Frame_s or Frame_t? ...
Hi, I have this: typedef enum{ Adjust_mode_None = 0, Adjust_mode_H_min, Adjust_mode_H_max, Adjust_mode_S_min, Adjust_mode_S_max, Adjust_mode_V_min, Adjust_mode_V_max }Adjust_mode; and at some point I want to do: adjust_mode_ = (adjust_mode_+1)%7; but I get Invalid conversion from int to Adjust_mode This is ok in other lan...
I am using structs in my project in this way: typedef struct { int str1_val1; int str1_val2; } struct1; and typedef struct { int str2_val1; int str2_val2; struct1* str2_val3; } struct2; Is it possible that I hack this definition in a way, that I would use only types with my code, like struct2* a; a = (struct2*...
Maybe my Google-fu just isn't strong enough. Using GCC 4.4.3, I've got a set of classes like this: template <typename storage_t, typename index_t = std::size_t, typename leaf_payload_t = std::size_t> struct btree_node { public: typedef btree_node<storage_t, index_t, leaf_payload_t> this_t; typedef boost::shared_ptr<this...
Inside of this first step towards a bootstrapped scheme interpreter I find the following set of typedef, struct, union, and enum definitions: typedef enum {FIXNUM} object_type; typedef struct object { object_type type; union { struct { long value; } fixnum; } data; } object; In particular, I'm ...
Ok guys, we all know there are all lot of typedef/struct questions out there, but I feel this one is a bit of a mind bender. I'm simulating the neighbor interactions of a crystal lattice using strictly C. I have a struct called "ball_struct" which I typedef'ed as just "ball". The struct contains a pointer to a list of ball_structs (sin...
using template classes I usually make some typedefs like: typedef super<puper<complex<template<type> > > > simple_name I usually do it in 2 ways: template <class A, ...> struct Types { typedef ... } template <class A, ...> class Part_Of_Logick { public: typedef ... } Is it possible to set typedefs at the global sco...
simplifying my problem we can consider: template <class T> class Base{ typedef typename std::pair<T, T> pair; }; template <class T> class Inheritor : public Base<T> { pair *p; // mean that we want to use constructor of std::pair. // say: std::pair withou argument list Inheritor<T>::pair *p...
typedef struct _VIDEO_STREAM_CONFIG_CAPS { GUID guid; ULONG VideoStandard; SIZE InputSize; SIZE MinCroppingSize; SIZE MaxCroppingSize; int CropGranularityX; int CropGranularityY; int CropAlignX; int CropAlignY; SIZE MinOutputSize; SIZE MaxOutputSize; int OutputGranularityX; int OutputGranularityY; int Stretch...
template <class T> struct ABC { typedef typename T* pT; }; int main(){} The above piece of code gives errors expected nested-name-specifier before 'T' expected ';' before '*' token What is wrong with the code sample? ...
I've seen both of the following two styles of declaring opaque types in C APIs. Is there any clear advantage to using one style over the other? Option 1 // foo.h typedef struct foo * fooRef; void doStuff(fooRef f); // foo.c struct foo { int x; int y; }; Option 2 // foo.h typedef struct _foo foo; void doStuff(foo *f); // fo...