ITcl :: try_eval command not working in Linux 5.4 Post: 302544188

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Top Forums Shell Programming and Scripting ITcl :: try_eval command not working in Linux 5.4 Post 302544188 by archana485 on Wednesday 3rd of August 2011 06:50:11 AM

08-03-2011

Registered User

ITcl :: try_eval command not working in Linux 5.4

Hi,

My code uses try_eval block to do some code execution. This piece of code does not work on RHEL 5.4. The program just hangs at the try_eval block and does not throw any errors either. The same program however works in other Linux boxes that we have.

I have written a simple program that uses try_eval as below. However, when i try to run the program it throws an "invalid command name". I am stuck and unable to move further. Any help/pointers on what i am doing incorrectly would be of great help !

Code:

package provide temp 1.0


namespace export temp



package require Itcl

namespace import -force ::itcl::*

set a "some var"
puts "$a"


class temp {

public method getEntry {} {


try_eval {
    # code
        puts -nonewline stderr "Enter a number: "
    set ans [gets stdin]
        
    set res [expr 1.0 + $ans]
        puts stderr "1 + $ans = $res"
   } {
    # catch
        set msg [lindex $errorCode end]
       puts stderr "Error: $msg"
    } {
    # finally
    puts stderr "End of example"
    }

}
}
variable tempObj
set tempObj [temp #auto]
puts "$tempObj"


set res [$tempObj getEntry]
puts "$res"

On running this i get the below error:

Code:

$tclsh temp.tcl

some var
temp0
invalid command name "try_eval"
    while executing
"try_eval {
    # code
        puts -nonewline stderr "Enter a number: "
    set ans [gets stdin]
    set res [expr 1.0 + $ans]
        puts stderr "1 ..."
    (object "::temp0" method "::temp::getEntry" body line 4)
    invoked from within
"$tempObj getEntry"
    invoked from within
"set res [$tempObj getEntry]"
    (file "temp.tcl" line 43)

I am using tcl version tcl8.4

Last edited by archana485; 08-03-2011 at 07:51 AM.. Reason: Command try_eval is being used in a TCL script

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LEARN ABOUT OSF1

feedback

feedback(1)						      General Commands Manual						       feedback(1)

NAME

       feedback - Generate an optimization feedback file using pixie and prof

SYNOPSIS

       feedback [prof-options] [-o feedback-file] [-v] objfile [objfile-arguments]

OPTIONS

       The  feedback  command accepts the following prof(1) options and any unambiguous abbreviations: -asm, -clock megahertz, -{e|E}xclude proce-
       dure_name, -feedback filename, -heavy, -invocations, -lines, -merge filename, -numbers, -{o|O}nly  procedure_name,  -procedures,  -quit	n,
       -testcoverage, -truecycles [0,1,2], -zero.

	      The  feedback  command ignores all other options in order to provide compatiblility with older versions of the feedback command.	An
	      option argument following an option not recognized by this or older versions of the feedback command will be treated as the  objfile
	      argument.  Specifies the name of the feedback file. This can also be specified by the -feedback option of prof.  You should use only
	      one of these options to specify a feedback file, not both.  Causes the pixie, application, and prof commands to be printed  as  they
	      are invoked.

OPERANDS

       Specifies  the executable of the application for which a feedback file is to be generated.  A pixie-instrumented version of this executable
       will be executed with the current working directory and environment variables.  The feedback file that is generated will reflect the behav-
       ior  of	one execution of the instrumented objfile. Specify the arguments that will cause the behavior that you want to have optimized when
       the compiler uses the feedback file.

DESCRIPTION

       The feedback command invokes pixie to add profiling code to an object file. The object file generated by pixie is executed to  obtain  pro-
       filing information.  The feedback command then invokes prof to analyze the profiling information.

       If  the output of objfile needs to be redirected, but not the output of the feedback utility, the redirection characters need to have sh(1)
       syntax and be within quotes. If objfile is multi-threaded, the LD_LIBRARY_PATH environment variable needs to include  the  current  working
       directory.

EXAMPLES

       Send  the  profiling  information  to  the  standard  output:  $  feedback  myprog Write a binary formatted performance profile to the file
       myprog.feedback, which then helps a subsequent recompilation optimize the program: $ feedback -feedback	myprog.feedback  myprog  $  cc	-O
       -feedback myprog.feedback -o myprog myprog.c

FILES

       Object  with  profiling	code.  Generated  by  pixie.   Basic  block  addresses.   Generated  by  pixie.  Basic block counts.  Generated by
       myprog.pixie.

       Note: Run pixie and prof independently if alternative names are needed.

SEE ALSO

       cc(1), pixie(5), prof(1)

																       feedback(1)