This predicate holds if the argument for `c` denotes the first character of a standard preprocessing directive.

Quick and simple predicate for constitutents of a narrow identifier.

case insensitive strcmp

for sorting tests by suite/file/line

A valid input line is either simple or composite.

matching of a string against a wildcard mask (case sensitivity configurable) taken from https://www.codeproject.com/Articles/1088/Wildcard-string-comp

-- impl::Asm

----------------- -- Binary_fold -- -----------------

-- impl::Break

-- impl::Class --

-- impl::Closure --

-- impl::Continue

-- impl::EH_parameter

--------------- -- Enclosure -- ---------------

------------------ -- impl::For_in -- ------------------

-- impl::Handler

-- impl::Interface_unit --

-- impl::Lambda

-- impl::Mapping

-- impl::Module --

-- impl::Namespace

-- impl::New --