Error Item – Error Messages

The error item contains information about an error, which includes the type (none, input or code), line number, column, length and previously the error message.  Continuing with the change from error messages to error status codes, the error message member was changed to an error status code.  This required a few additional changes.

The cursor changed signal is emitted from the edit box instance and is connected to the status bar update slot of the main window instance.  Previously the argument of this signal and slot was the error message string.  These arguments were changed to the status code.  The slot was changed to obtain the error message for the error status code.  If the status code was the default (same as the good status), a blank message is displayed on the status line.

The cursor changed signal previously obtained the error message from the error message access function of the program model.  This function obtained the error message for a line number by accessing the item in the error list in the program model.  If there was no error on the line a blank string was returned.  Since the items in the error list now contain error status codes, the status code is returned.  If the line does not have an error, the default status code (good) is returned.

Finally in the tester class, the error string argument of the print error function was changed to a error status code since that's what all the callers now have.  The error message is now obtained from the status code argument in the print error function instead of by each of the callers obtaining the error message.

[branch err-msgs commit 0050184ac7]