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jeremybenn |
/* Copyright (C) 2000 Free Software Foundation, Inc. */
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/* { dg-do preprocess } */
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/* { dg-options "-pedantic -std=gnu99" } */
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/* Tests macro syntax, for both definition and invocation, including:-
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o Full range of macro definition semantics.
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o No. of arguments supplied to function-like macros.
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o Odd GNU rest args behavior.
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o Macro arguments do not flow into the rest of the file. */
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/* Test basic macro definition syntax. The macros are all called
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"foo" deliberately to provoke an (excess) redefinition warning in
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case the macros succeed in being entered in the macro hash table
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despite being an error.
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Split a couple of the lines to check that the errors appear on the
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right line (i.e. are associated with the correct token). */
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#define ; /* { dg-error "identifier" } */
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#define SEMI; /* { dg-warning "space" } */
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#define foo(X /* { dg-error "missing" } */
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#define foo\
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(X,) /* { dg-error "parameter name" } */
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#define foo(, X) /* { dg-error "parameter name" } */
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#define foo(X, X) /* { dg-error "duplicate" } */
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#define foo(X Y) /* { dg-error "comma" } */
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#define foo(() /* { dg-error "may not appear" } */
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#define foo(..., X) /* { dg-error "missing" } */
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#define foo \
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__VA_ARGS__ /* { dg-warning "__VA_ARGS__" } */
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#define goo(__VA_ARGS__) /* { dg-warning "__VA_ARGS__" } */
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#define hoo(...) __VA_ARGS__ /* OK. */
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#define __VA_ARGS__ /* { dg-warning "__VA_ARGS__" } */
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__VA_ARGS__ /* { dg-warning "__VA_ARGS__" } */
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/* test # of supplied arguments. */
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#define none()
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#define one(x)
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#define two(x, y)
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#define var0(...)
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#define var1(x, ...)
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none() /* OK. */
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none(ichi) /* { dg-error "passed 1" } */
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one() /* OK. */
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one(ichi) /* OK. */
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one(ichi\
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, ni) /* { dg-error "passed 2" } */
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two(ichi) /* { dg-error "requires 2" } */
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var0() /* OK. */
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var0(ichi) /* OK. */
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var1() /* { dg-warning "rest arguments to be used" } */
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var1(ichi) /* { dg-warning "rest arguments to be used" } */
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var1(ichi, ni) /* OK. */
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/* This tests two oddities of GNU rest args - omitting a comma is OK,
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and backtracking a token on pasting an empty rest args. */
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#define rest(x, y...) x ## y /* { dg-warning "ISO C" } */
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rest(ichi,) /* OK. */
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rest(ichi) /* { dg-warning "rest arguments to be used" } */
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#if 23 != rest(2, 3) /* OK, no warning. */
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#error 23 != 23 !!
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#endif
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/* Test that we don't allow arguments to flow into the rest of the
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file. */
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#define half_invocation do_nowt(2
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#define do_nowt(x) x
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half_invocation ) /* OK. */
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do_nowt (half_invocation)) /* { dg-error "unterminated argument" } */
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