0029024: DRAW - use common approach for reporting error message on wrong command arguments

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0029024

Open CASCADE

[OCCT] OCCT:DRAW

public

2017-08-21 11:11

2017-08-21 16:49

Reporter

abv

Assigned To

apn

Priority

normal

Severity

minor

Status

new

Resolution

open

Platform

OS Version

Product Version

Target Version

[OCCT] 7.4.0*

Fixed in Version

Summary

0029024: DRAW - use common approach for reporting error message on wrong command arguments

Description

It is a good practice to output clear error message when DRAW command is called with incorrect arguments. This is done in many commands, however not always in the same way. To provide consistent behavior for all commands, it is proposed to:

1. Define common method for reporting this kind of errors, e.g. Draw_Interpretor::ErrorOnWrongArgs(), to be called as follows:

<code>
  Standard_Integer mycommand (Draw_Interpretor& theDI, Standard_Integer theArgc, const char** theArgv)
  {
    if (theArgc < 3)
    {
      return theDI.ErrorOnWrongArgs (theArgv[0]);
    }
    ...
  }
</code>

2. Use this method in all DRAW commands

The new method should:

- Print (to std::cerr) error message indicating that command is called with wrong number of arguments

- Print help for the current command to let the user know what arguments are expected (this help should be already recorded when command is added by method Add())

- Return 1 (indicating error in Tcl)

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Notes
(0069710) abv (manager) 2017-08-21 13:26 edited on: 2017-08-21 16:49	Method Draw_Interpretor::ErrorOnWrongArgs() is implemented in branch CR29024

(0069722) git (administrator) 2017-08-21 16:48	Branch CR29024 has been created by abv. SHA-1: 6d61efef1e3a51ef616350ec715ada67816413ac Detailed log of new commits: Author: abv Date: Mon Aug 21 16:48:23 2017 +0300 0029024: DRAW - use common approach for reporting error message on wrong command arguments Method Draw_Interpretor::ErrorOnWrongArgs() is added, providing user message for DRAW command called with incorrect arguments.

Issue History
Date Modified	Username	Field	Change
2017-08-21 11:11	abv	New Issue
2017-08-21 11:11	abv	Assigned To	=> apn
2017-08-21 13:26	abv	Note Added: 0069710
2017-08-21 13:26	abv	Relationship added	related to 0028964
2017-08-21 16:48	git	Note Added: 0069722
2017-08-21 16:49	abv	Note Edited: 0069710	View Revisions