Integrate a Problem Matcher

A problem matcher is a feature of Visual Studio Code. It scans the build output for error messages and converts them to errors that can be shown inside the editor or in the Problems panel.

If you have any custom build tasks, you need to manually enable suitable problem matchers for them. In order to integrate a problem matcher, add the following code to the task definition inside the tasks.json file:

           "problemMatcher": [
               "ProblemMatcher"
            ]

The following problem matchers are available for COBOL code:

$COBOLErrFormat2Copybooks - use this followed by the $COBOLErrFormat2 matcher
$COBOLErrFormat2 - matches the build output when the errformat(2) directive is used
$COBOLErrFormat3 - matches the build output when the errformat(3) directive is used
$COBOLMSBuild - use this for COBOL MSBuild projects created with Enterprise Developer for Visual Studio
$COBOLAnt- use this for COBOL Eclipse projects created with Enterprise Developer for Eclipse
$COBOLAntCopybooks - use this to match errors in copybooks that get emitted by the Ant build of the COBOL Eclipse projects. This matcher can only be used together with the $COBOLAnt problem matcher. $COBOLAntCopybooks should precede $COBOLAnt in the tasks.json file:
```
           "problemMatcher": [
               "$COBOLAntCopybooks",
               "$COBOLAnt"
            ] 
```

The following problem matchers are available for PL/I code:

$PLIMSBuild - use this for PL/I MSBuild projects created with Enterprise Developer for Visual Studio
$PLIAnt - use this for PL/I Eclipse projects created with Enterprise Developer for Eclipse