[PATCH] Improve diagnostics of number-reading preprocessor directives

[Michael Ilseman]

Attached is a patch to improve the diagnostics of number-reading preprocessor directives. For example, the digit directive was sharing number-reading code with the #line directive, however some of the errors and warnings generated were written for the #line directive.

#line 11foo1 ==> "#line directive requires a simple digit sequence"
# 11foo1       ==> "#line directive requires a simple digit sequence"

This patch parameterizes the error/warning so that the caller can specify their own directive to report:

#line 11foo1 ==> "#line directive requires a simple digit sequence"
# 11foo1       ==> "digit directive requires a simple digit sequence"

Test case in patch.


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