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c++: workaround portability issue

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On some systems (x86_64-pc-solaris2.11), with Developer Studio 12.5's
CC, we get:

    ".../include/CC/Cstd/vector.cc", line 127: Error: Cannot assign const yy::parser::stack_symbol_type to yy::parser::stack_symbol_type without "yy::parser::stack_symbol_type::operator=(const yy::parser::stack_symbol_type&)";.
    ".../include/CC/Cstd/vector", line 475:     Where: While instantiating "std::vector<yy::parser::stack_symbol_type>::__insert_aux(yy::parser::stack_symbol_type*, const yy::parser::stack_symbol_type&)".
    ".../include/CC/Cstd/vector", line 475:     Where: Instantiated from non-template code.
    1 Error(s) detected.

Don't expect __cplusplus to be always defined.  If it's not, consider
this is C++98.

Reported by Nelson H. F. Beebe.

* data/c++.m4, data/lalr1.cc, examples/c++/variant.yy, tests/local.at,
* tests/testsuite.h:
An undefined __cplusplus means pre C++11.
This commit is contained in:
Akim Demaille
2018-11-03 08:48:48 +01:00
parent 5a0d7802f4
commit eff6739124
5 changed files with 13 additions and 13 deletions
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2
tests/testsuite.h
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@@ -7,7 +7,7 @@
/* In C++ pre C++11 it is standard practice to use 0 for the null
pointer. But GCC -std=c++98 with -Wzero-as-null-pointer-constant
warns about this. Warning introduced in GCC 4.7. */
#if defined __cplusplus && __cplusplus < 201103L
#if !defined __cplusplus || __cplusplus < 201103L
# if defined __GNUC__ && ! defined __clang__ && 407 <= __GNUC__ * 100 + __GNUC_MINOR__
# pragma GCC diagnostic ignored "-Wzero-as-null-pointer-constant"
# endif