DOKK / manpages / debian 11 / tcl8.6-doc / Tcl_Concat.3tcl.en
Tcl_Concat(3tcl) Tcl Library Procedures Tcl_Concat(3tcl) 







Tcl_Concat - concatenate a collection of strings








#include <tcl.h>

const char *
Tcl_Concat(argc, argv)









  
int argc (in)

  
Number of strings.

  
const char *const argv[] (in)

  
Array of strings to concatenate. Must have argc entries.
    
    

    

  










Tcl_Concat is a utility procedure used by several of the
    Tcl commands. Given a collection of strings, it concatenates them together
    into a single string, with the original strings separated by spaces. This
    procedure behaves differently than Tcl_Merge, in that the arguments
    are simply concatenated: no effort is made to ensure proper list structure.
    However, in most common usage the arguments will all be proper lists
    themselves; if this is true, then the result will also have proper list
    structure.


Tcl_Concat eliminates leading and trailing white space as
    it copies strings from argv to the result. If an element of
    argv consists of nothing but white space, then that string is ignored
    entirely. This white-space removal was added to make the output of the
    concat command cleaner-looking.


The result string is dynamically allocated using Tcl_Alloc;
    the caller must eventually release the space by calling Tcl_Free.








Tcl_ConcatObj








concatenate, strings







  

    7.5
    Tcl