preprocessFileLineNumbers

1.001.001.001.501.000.50

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Description

Description:

Returns the preprocessed content of the given file. The preprocessor is C-like, it supports comments using /* */ and PreProcessor Commands. The preprocessor also adds a default debug entrypoint for compiler at the begining of script: #line 1 "aFilename"

The #line keyword can be used in any script that are not preprocess, or with preprocess script with extra macro to protect reserverd sharp character. The format is:
#line <number> "<name>"
followed by new line. <number> could be only positive integer and <name> could be any name. This will be used only if an error occurs in the script. The error will contain the line: File <filename>, line <linenumber>
where <filename> will be the <name> you set and <linenumber> will be <number> + how many lines it is from the #line line. If the error happened on the line right under #line it will add 0 to <number>, if on second line, it will add 1 etc.

It is possible to use more than one #line keywords, but it seems having just one at the top for little script is enough to pinpoint position of the error easily.

⚠

If the file you are loading is not prepared using UTF-8 encoding and contains some characters with codes > 127, they might convert incorrectly

Groups:

System

Syntax

Syntax:

preprocessFileLineNumbers fileName

Parameters:

fileName: String - path to the file

Return Value:

String - file content containing #line 1 "aFilename"

Examples

Example 1:

_string = preprocessFileLineNumbers "A3\ui_f\scripts\IGUI\RscUnitInfo.sqf" Result is:
#line 1 "A3\ui_f\scripts\IGUI\RscUnitInfo.sqf"
disableserialization;
........

Additional Information

See also:

fileExists preprocessFile loadFile Function SQF Syntax call spawn execVMPreProcessor Commands

Notes

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Only post proven facts here! Add Note

Posted on December 17, 2013

Killzone_Kid

The main difference between preprocessFile and preprocessFileLineNumbers is that the latter adds #line keyword to the target file, which allows to log the __LINE__ error happened at and the __FILE__ error happened in.

Posted on November 4, 2017 - 10:16 (UTC)

code34

The #line directive get's removed from the output.
So to add a custom #line directive before while using preprocessFileLineNumbers, you have to use a preprocessor macro like this:
#define DEBUG(sharp,name) sharp##line 0 name
and add this at the right place in your code
DEBUG(#,"your filename"); This way you can have custom filenames in error messages.