c - typedef'd struct not found by header -

-

i'm sure foolish, i'm stumped:

i have typedef'd struct declared in 1 header:

firstheader.h

typedef struct pin {      uint8_t a;     uint8_t b; } pinstruct;

i want use typedef'd struct in function declaration in header:

secondheader.h

#include "firstheader.h"  void foo (const pinstruct *mypin);

despite typedef'd struct being defined in first header, , including first header in second header, compiler complains "identifier pinstruct undefined". please smack me , tell me i'm missing.

edit: comments guys. compiler marking function declaration in second header source of error. exact error wrote: error[pe020]: identifier "pinstruct" undefined.

what's strange if copy struct definition secondheader.h header file, compiler complians re-definition of struct. knows there.

your code should work fine (tested both gcc , clang).

  1. you defining structure within typedef , aliasing pinstruct -- no errors.
  2. you include first header file -- no errors.
  3. you use pinstruct in function declaration of foo -- no errors.

the error in c source file, have included header file of "file 2" in c source file of "file 2"? example:

// file file_1.h typedef ...

... and:

// file file_2.h #include "file_1.h"  // function declaration.

... , lastly (error here):

// file 2.c #include "file_2.h" // forgot?

Comments

Post a Comment

Popular posts from this blog

ios - RestKit 0.20 — CoreData: error: Failed to call designated initializer on NSManagedObject class (again) -

-
this error has shown on many times, seems. prominent answer issue seems restkit 0.20 — coredata: error: failed call designated initializer on nsmanagedobject class however, solution posted doesn't work me. let's start beginning: i want upload file server. want parse response make sure uploaded. if not, try again later. model has boolean variable called nsnumber *senttoserver purpose (in coredata, bool saved nsnumber ) . because don't know whether sending going successful, save entity coredata model first before sending via restkit. when post request successful, server returns json string this: {"id":14,"created":true} notice that, of course, id not set on coredata model yet, both id , created new informations model. here's model: @interface recording : nsmanagedobject @property (nonatomic, retain) nsstring * audiofilepath; @property (nonatomic, retain) nsdate * createdat; @property (nonatomic, retain) nsstring * deviceid; @...
Read more

java - Digest auth with Spring Security using javaconfig -

-
so i'm trying create digest authentication spring following documentation trying translate xml "requirements" in java requirements. let's have xml in docs: <bean id="digestfilter" class= "org.springframework.security.web.authentication.www.digestauthenticationfilter"> <property name="userdetailsservice" ref="jdbcdaoimpl"/> <property name="authenticationentrypoint" ref="digestentrypoint"/> <property name="usercache" ref="usercache"/> </bean> <bean id="digestentrypoint" class= "org.springframework.security.web.authentication.www.digestauthenticationentrypoint"> <property name="realmname" value="contacts realm via digest authentication"/> <property name="key" value="acegi"/> <property name="noncevalidityseconds" value="10"/> </b...
Read more

laravel - PDOException in Connector.php line 55: SQLSTATE[HY000] [1045] Access denied for user 'root'@'localhost' (using password: YES) -

-
my .env: app_env=local app_debug=true app_key=myappkey app_url=http://localhost db_connection=mysql db_host=localhost db_port=3306 db_database=gestiontaller db_username=root db_password='root' cache_driver=file session_driver=file queue_driver=sync redis_host=127.0.0.1 redis_password=null redis_port=6379 mail_driver=smtp mail_host=mailtrap.io mail_port=2525 mail_username=null mail_password=null mail_encryption=null i've tried password ", ' , without, restarting server every time. i've tried changing localhost 172.0.0.1. yes, password correct, running mysql -u root -p introducing password root in prompt can go mysql. users table: +------------------+-----------+ | user | host | +------------------+-----------+ | debian-sys-maint | localhost | | mysql.sys | localhost | | root | localhost | | root1 | localhost | +------------------+-----------+ i've added homestead.yaml this: database_port: 3306 ...
Read more