[Scip] some questions about the file readers in the coloring example

[gamrath@zib.de]

Hi Xiangyong,

for each kind of plugin, you can look in the type_xyz.h file in the
src/scip/ directory in your SCIP folder in order to get the definitions of
the callbacks for this plugin. For example, in the type_reader.h file, you
will find the following line:
#define SCIP_DECL_READERREAD(x) SCIP_RETCODE x (SCIP* scip, SCIP_READER*
reader, const char* filename, SCIP_RESULT* result)
together with a description of the parameters and possible return values.

So, the scip, reader, filename and result pointers are all parameters of
the method you defined.

Best, Gerald

> Dear all,
>
> I tried to understand the file reader "READERREAD" in the coloring example
> given below.
>
>
> /** problem reading method of reader */
> static
> SCIP_DECL_READERREAD(readerReadCol)
> {  /*lint --e{715}*/
>    assert(reader != NULL);
>    assert(strcmp(SCIPreaderGetName(reader), READER_NAME) == 0);
>    assert(scip != NULL);
>    assert(result != NULL);
>
>    SCIP_CALL( readCol(scip, filename) );
>
>    *result = SCIP_SUCCESS;
>
>    return SCIP_OKAY;
> }
>
> I have some questions:
> (1) in the aboer "READERREAD", are reader and result the reserverd words
> in SCIP system?  If not, why we can use them without definition.
> (2) in the calling of subroutine "readCol", where the filename is defined?
>
>
> Thanks for your help.
>
> Xiangyong
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