cconcat is one of many Tclx commands.
Concatenate the arguments, returning the resulting string. While string concatenation is normally performed by the parser, it is occasionally useful to have a command that returns a string. The is generally useful when a command to evaluate is required. No separators are inserted between the strings.
This command is UTF-aware.
An example of the use of this would be
package require Tclx set cstring [cconcat abc [glob xyz.tcl]]
which might produce output such as
abcxyz.tcl
A minimal pure-Tcl substitute would be
proc cconcat args {join $args ""} ;# RSSee also string concat for contemplations about adding this functionality as a subcommand of string.