How to match error with regex?

[Fiji]

How can I match this error in the build with regex to locate line and file? With result_line_regex & result_file_regex

project4.dpr(9) Hint: H2164 Variable ‘I’ is declared but never used in ‘Project3’

[michalisb]

Is this a question regarding regex or how to use the build system to capture those errors?

The line_regex works in conjuction with the file_regex when the output of an error is (usually) more than a line.

From the docs:

[quote]result_file_regex

If result_file_regex doesn’t match but result_line_regex exists and does match on the current line, walk backwards through the buffer until a line matching result_file_regex is found, and use the two matches to determine the file and line to go to.
[/quote]