Text-lines are processed as if they were preprocessing directives

[tomasz.miasko@…]

Wave treats some text-lines as if they were preprocessing directives. This behaviour is trigger by following code, which is an example taken from C99 standard, with an additional newline:

#define EMPTY

EMPTY # include <file.h>

$ wave --c99 example.c 
example.c:3:7: error: could not find include file: file.h

Relevant part of C99 standard:

A preprocessing directive consists of a sequence of preprocessing tokens that satisfies the following constraints: The first token in the sequence is a # preprocessing token that (at the start of translation phase 4) is either the first character in the source file (optionally after white space containing no new-line characters) or that follows white space containing at least one new-line character.

It seems the same is true for other C/C++ standards, even if they do not specify that this conditions should occur at start of translation phase 4 (​http://www.open-std.org/jtc1/sc22/wg14/docs/rr/dr_144.html).

[Hartmut Kaiser]

(In [79684]) Fixed #7159: Text-lines are processed as if they were preprocessing directives