OS-DIR option of INPUT FROM statement bypasses compiler keyword forget list

Jan 12, 2022
Knowledge

Title

URL Name

os-dir-option-of-input-from-statement-bypasses-compiler-keyword-forget-list

Article Number

000208018

Environment

Product:OpenEdge Version:12.x OS: All supported platforms

Question/Problem Description

OS-DIR option of INPUT FROM statement bypasses compiler keyword forget list

Using a keyword forget list (-k) that includes the OS-DIR option of the INPUT FROM statement. If there is a space between OS-DIR and its open bracket, as expected the compiler raises an error. But if there isn't a space between OS-DIR and the bracket then OS-DIR bypasses the keyword forget list.

For example the session is started using:

prowin.exe -k keywordForgetList.txt

The keywordForgetList.txt file contains:

OS-DIR
OS-GETENV
BUFFER

Compiling the following code in the session results in error 262 followed by 196:

INPUT FROM OS-DIR ('C:\temp').

But if the code is modified to:

INPUT FROM OS-DIR('C:\temp').

This code will compile without error.

Steps to Reproduce

Clarifying Information

Error Message

** Invalid INPUT/OUTPUT option. (262) ** Could not understand line 1. (196)

Defect Number

Enhancement Number

Cause

This is expected behavior. The reason there isn't a compile time error when the space is removed is because the syntax of the statement is correct and the compiler doesn't parse filenames to determine if they are valid. This is done at runtime.

With the 'OS-DIR' in the keyword forget list the compiler does ignore the OS-DIR keyword, but it doesn't remove it from the code, it simply becomes a normal non-keyword token. Subsequently with the space after OS-DIR the compiler raises a syntax error because 'OS-DIR' is no longer a valid option to INPUT FROM. However removing the space changes the form of the statement to:

INPUT FROM opsys-file

Where 'OS-DIR('C:\temp')' is opsys-file. The fact that there isn't a physical file with this name isn't important to the compiler. It only checks syntax. The validity of the file will be checked at runtime and an error will be raised.

Resolution

None at this time.

Workaround

Notes

Progress Article(s):
000148233, How to use Keyword Forget List (-k) to disable Progress keywords
000123241, When Progress Keywords can be used and when they cannot

References to Other Documentation:
OpenEdge Development: ABL Reference, "INPUT FROM statement"

Keyword Phrase

Last Modified Date

1/14/2022 12:16 PM

OS-DIR option of INPUT FROM statement bypasses compiler keyword forget list

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