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cpplib.h (struct cpp_options): Add warn_cxx_operator_names field.

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libcpp/:
	* include/cpplib.h (struct cpp_options): Add
	warn_cxx_operator_names field.
	(NODE_WARN_OPERATOR): Define.
	(struct cpp_hashnode): Increase flags field to 10 bits, decrease
	type to 6 bits.
	* init.c (mark_named_operators): Add flags parameter.
	(cpp_post_options): Pick flags value to pass to
	mark_named_operators.
	* lex.c (lex_identifier): If NODE_WARN_OPERATOR is set, warn that
	identifier is an operator name in C++.
gcc/:
	* fold-const.c (fold_unary): Rename local variable and to
	and_expr.
	* c-opts.c (c_common_handle_option): For -Wc++-compat set
	cpp_opts->warn_cxx_operator_names.
gcc/testsuite/:
	* gcc.dg/Wcxx-compat-13.c: New testcase.

From-SVN: r148438
This commit is contained in:
Ian Lance Taylor 2009-06-12 19:43:25 +00:00 • committed by Ian Lance Taylor
parent 737142ced7
commit 3d8b2a98ca
9 changed files with 82 additions and 11 deletions
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11
libcpp/include/cpplib.h
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@ -397,6 +397,9 @@ struct cpp_options
/* Nonzero means handle C++ alternate operator names. */
unsigned char operator_names;
/* Nonzero means warn about use of C++ alternate operator names. */
unsigned char warn_cxx_operator_names;
/* True for traditional preprocessing. */
unsigned char traditional;
@ -555,7 +558,8 @@ extern const char *progname;
identifier that behaves like an operator such as "xor".
NODE_DIAGNOSTIC is for speed in lex_token: it indicates a
diagnostic may be required for this node. Currently this only
applies to __VA_ARGS__ and poisoned identifiers. */
applies to __VA_ARGS__, poisoned identifiers, and -Wc++-compat
warnings about NODE_OPERATOR. */
/* Hash node flags. */
#define NODE_OPERATOR (1 << 0) /* C++ named operator. */
@ -567,6 +571,7 @@ extern const char *progname;
#define NODE_MACRO_ARG (1 << 6) /* Used during #define processing. */
#define NODE_USED (1 << 7) /* Dumped with -dU. */
#define NODE_CONDITIONAL (1 << 8) /* Conditional macro */
#define NODE_WARN_OPERATOR (1 << 9) /* Warn about C++ named operator. */
/* Different flavors of hash node. */
enum node_type
@ -636,8 +641,8 @@ struct GTY(()) cpp_hashnode {
then index into directive table.
Otherwise, a NODE_OPERATOR. */
unsigned char rid_code; /* Rid code - for front ends. */
ENUM_BITFIELD(node_type) type : 7; /* CPP node type. */
unsigned int flags : 9; /* CPP flags. */
ENUM_BITFIELD(node_type) type : 6; /* CPP node type. */
unsigned int flags : 10; /* CPP flags. */
union _cpp_hashnode_value GTY ((desc ("CPP_HASHNODE_VALUE_IDX (%1)"))) value;
};