Difference between revisions of "DISPLAY CALLS"
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==Class== | ==Class== | ||
Error Handling and Debugging | Error Handling and Debugging | ||
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==Purpose== | ==Purpose== | ||
| + | Display program stack | ||
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==See Also== | ==See Also== | ||
| − | [[DB_PRINT]], [[DISPLAY PROCEDURE]], [[DISPLAY STATUS]], [[DOLEVEL()]], [[Function Keys]], [[LIST CALLS]], [[LIST PROCEDURE]], [[SET PAGELENGTH]], [[SET PAGEWIDTH]], [[SET PRINTER]], [[SET PROCEDURE]] | + | [[DB_PRINT]], [[DEBUG]], [[DISPLAY PROCEDURE]], [[DISPLAY STATUS]], [[DOLEVEL()]], [[Function Keys]], [[LIST CALLS]], [[LIST PROCEDURE]], [[ON ERROR]], [[PROCNAME()]], [[PROGRAM()]], [[RESUME]], [[SAVE ERROR]], [[SET PAGELENGTH]], [[SET PAGEWIDTH]], [[SET PRINTER]], [[SET PROCEDURE]], [[SET STEP]], [[SUSPEND]] |
==Description== | ==Description== | ||
| − | The DISPLAY CALLS command displays on screen the | + | The DISPLAY CALLS command displays on screen the name and line number of the current program or procedure/function and the program stack - program name and line number - from which it was called. |
DISPLAY commands differ from LIST commands in that they pause every 17 lines until a key is pressed. You can cancel any further output at this point by pressing the [ABANDON] key. Where the output is sent to a file or printer, the pause is disabled. | DISPLAY commands differ from LIST commands in that they pause every 17 lines until a key is pressed. You can cancel any further output at this point by pressing the [ABANDON] key. Where the output is sent to a file or printer, the pause is disabled. | ||
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==Example== | ==Example== | ||
<code lang="recital"> | <code lang="recital"> | ||
| − | display calls | + | on error display calls |
</code> | </code> | ||
Revision as of 15:17, 23 June 2009
Class
Error Handling and Debugging
Purpose
Display program stack
Syntax
DISPLAY CALLS [TO FILE <.txt filename> | (<expC>)] | [TO PRINT]
See Also
DB_PRINT, DEBUG, DISPLAY PROCEDURE, DISPLAY STATUS, DOLEVEL(), Function Keys, LIST CALLS, LIST PROCEDURE, ON ERROR, PROCNAME(), PROGRAM(), RESUME, SAVE ERROR, SET PAGELENGTH, SET PAGEWIDTH, SET PRINTER, SET PROCEDURE, SET STEP, SUSPEND
Description
The DISPLAY CALLS command displays on screen the name and line number of the current program or procedure/function and the program stack - program name and line number - from which it was called.
DISPLAY commands differ from LIST commands in that they pause every 17 lines until a key is pressed. You can cancel any further output at this point by pressing the [ABANDON] key. Where the output is sent to a file or printer, the pause is disabled.
| Keyword | Description |
|---|---|
| TO <file> | The display output will be sent to the specified file. The filename can be substituted with a <expC>, enclosed in round brackets, which returns a valid filename. If no file extension is specified, then ".txt" will be used. The command SET PAGELENGTH governs the output file pagination and SET PAGEWIDTH defines the width of each page. Page numbers are centered on the bottom of the page according to width. |
| TO PRINT | The display output will be sent to a printer. The TO PRINT option will default to a local printer unless the command SET PRINTER TO \\SPOOLER is issued. The print request will then be spooled to the system printer, which is defined by the environment variable DB_PRINT. |
Example
on error display calls
Products
Recital Database Server, Recital Mirage Server, Recital Terminal Developer
