[C++ PATCH] overloaded operator fns [4/N]

https://gcc.gnu.org/ml/gcc-patches/2017-10/msg02362.html
	* lex.c (init_operators): Allow NULL operator name.  Don't add
	special cases.
	* operators.def: Use NULL for mangling only operators.  Move to
	after regular operators but move assignment operators last.

From-SVN: r254276

3 files changed, 27 insertions, 60 deletions

diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index 82651bf..edc806e 100644
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,5 +1,10 @@
 2017-10-31  Nathan Sidwell  <nathan@acm.org>
 
+	* lex.c (init_operators): Allow NULL operator name.  Don't add
+	special cases.
+	* operators.def: Use NULL for mangling only operators.  Move to
+	after regular operators but move assignment operators last.
+
 	* cp-tree.h (enum ovl_op_flags): New.
 	(struct operator_name_info_t): Rename arity to flags.
 	* lex.c (set_operator_ident): New.
diff --git a/gcc/cp/lex.c b/gcc/cp/lex.c
index cd2d886..fed44a1 100644
--- a/gcc/cp/lex.c
+++ b/gcc/cp/lex.c
@@ -143,48 +143,14 @@ init_operators (void)
   oni->name = NAME;							\
   oni->mangled_name = MANGLING;						\
   oni->flags = FLAGS;							\
-  identifier = set_operator_ident (oni);				\
-									\
-  if (KIND != cik_simple_op || !IDENTIFIER_ANY_OP_P (identifier))	\
-    set_identifier_kind (identifier, KIND);
+  if (NAME) {								\
+    identifier = set_operator_ident (oni);				\
+    if (KIND != cik_simple_op || !IDENTIFIER_ANY_OP_P (identifier))	\
+      set_identifier_kind (identifier, KIND);				\
+  }
 
 #include "operators.def"
 #undef DEF_OPERATOR
-
-  operator_name_info[(int) TYPE_EXPR] = operator_name_info[(int) CAST_EXPR];
-  operator_name_info[(int) ERROR_MARK].identifier
-    = get_identifier ("<invalid operator>");
-
-  /* Handle some special cases.  These operators are not defined in
-     the language, but can be produced internally.  We may need them
-     for error-reporting.  (Eventually, we should ensure that this
-     does not happen.  Error messages involving these operators will
-     be confusing to users.)  */
-
-  operator_name_info [(int) INIT_EXPR].name
-    = operator_name_info [(int) MODIFY_EXPR].name;
-
-  operator_name_info [(int) EXACT_DIV_EXPR].name = "(ceiling /)";
-  operator_name_info [(int) CEIL_DIV_EXPR].name = "(ceiling /)";
-  operator_name_info [(int) FLOOR_DIV_EXPR].name = "(floor /)";
-  operator_name_info [(int) ROUND_DIV_EXPR].name = "(round /)";
-  operator_name_info [(int) CEIL_MOD_EXPR].name = "(ceiling %)";
-  operator_name_info [(int) FLOOR_MOD_EXPR].name = "(floor %)";
-  operator_name_info [(int) ROUND_MOD_EXPR].name = "(round %)";
-
-  operator_name_info [(int) ABS_EXPR].name = "abs";
-  operator_name_info [(int) TRUTH_AND_EXPR].name = "strict &&";
-  operator_name_info [(int) TRUTH_OR_EXPR].name = "strict ||";
-  operator_name_info [(int) RANGE_EXPR].name = "...";
-  operator_name_info [(int) UNARY_PLUS_EXPR].name = "+";
-
-  assignment_operator_name_info [(int) EXACT_DIV_EXPR].name = "(exact /=)";
-  assignment_operator_name_info [(int) CEIL_DIV_EXPR].name = "(ceiling /=)";
-  assignment_operator_name_info [(int) FLOOR_DIV_EXPR].name = "(floor /=)";
-  assignment_operator_name_info [(int) ROUND_DIV_EXPR].name = "(round /=)";
-  assignment_operator_name_info [(int) CEIL_MOD_EXPR].name = "(ceiling %=)";
-  assignment_operator_name_info [(int) FLOOR_MOD_EXPR].name = "(floor %=)";
-  assignment_operator_name_info [(int) ROUND_MOD_EXPR].name = "(round %=)";
 }
 
 /* Initialize the reserved words.  */
diff --git a/gcc/cp/operators.def b/gcc/cp/operators.def
index 51f7465..51d2c3a 100644
--- a/gcc/cp/operators.def
+++ b/gcc/cp/operators.def
@@ -100,13 +100,6 @@ DEF_SIMPLE_OPERATOR ("alignof", ALIGNOF_EXPR, "az", OVL_OP_FLAG_UNARY)
 DEF_SIMPLE_OPERATOR ("__imag__", IMAGPART_EXPR, "v18__imag__", OVL_OP_FLAG_UNARY)
 DEF_SIMPLE_OPERATOR ("__real__", REALPART_EXPR, "v18__real__", OVL_OP_FLAG_UNARY)
 
-/* The cast operators.  */
-DEF_SIMPLE_OPERATOR ("", CAST_EXPR, "cv", OVL_OP_FLAG_UNARY)
-DEF_SIMPLE_OPERATOR ("dynamic_cast", DYNAMIC_CAST_EXPR, "dc", OVL_OP_FLAG_UNARY)
-DEF_SIMPLE_OPERATOR ("reinterpret_cast", REINTERPRET_CAST_EXPR, "rc", OVL_OP_FLAG_UNARY)
-DEF_SIMPLE_OPERATOR ("const_cast", CONST_CAST_EXPR, "cc", OVL_OP_FLAG_UNARY)
-DEF_SIMPLE_OPERATOR ("static_cast", STATIC_CAST_EXPR, "sc", OVL_OP_FLAG_UNARY)
-
 /* Binary operators.  */
 DEF_SIMPLE_OPERATOR ("+", PLUS_EXPR, "pl", OVL_OP_FLAG_BINARY)
 DEF_SIMPLE_OPERATOR ("-", MINUS_EXPR, "mi", OVL_OP_FLAG_BINARY)
@@ -133,8 +126,23 @@ DEF_SIMPLE_OPERATOR ("->", COMPONENT_REF, "pt", OVL_OP_FLAG_BINARY)
 DEF_SIMPLE_OPERATOR ("[]", ARRAY_REF, "ix", OVL_OP_FLAG_BINARY)
 DEF_SIMPLE_OPERATOR ("++", POSTINCREMENT_EXPR, "pp", OVL_OP_FLAG_BINARY)
 DEF_SIMPLE_OPERATOR ("--", POSTDECREMENT_EXPR, "mm", OVL_OP_FLAG_BINARY)
-/* This one is needed for mangling.  */
-DEF_SIMPLE_OPERATOR ("::", SCOPE_REF, "sr", OVL_OP_FLAG_BINARY)
+
+/* Miscellaneous.  */
+DEF_SIMPLE_OPERATOR ("?:", COND_EXPR, "qu", OVL_OP_FLAG_NONE)
+DEF_SIMPLE_OPERATOR ("()", CALL_EXPR, "cl", OVL_OP_FLAG_NONE)
+
+/* Operators needed for mangling.  */
+DEF_SIMPLE_OPERATOR (NULL, CAST_EXPR, "cv", OVL_OP_FLAG_NONE)
+DEF_SIMPLE_OPERATOR (NULL, DYNAMIC_CAST_EXPR, "dc", OVL_OP_FLAG_NONE)
+DEF_SIMPLE_OPERATOR (NULL, REINTERPRET_CAST_EXPR, "rc", OVL_OP_FLAG_NONE)
+DEF_SIMPLE_OPERATOR (NULL, CONST_CAST_EXPR, "cc", OVL_OP_FLAG_NONE)
+DEF_SIMPLE_OPERATOR (NULL, STATIC_CAST_EXPR, "sc", OVL_OP_FLAG_NONE)
+DEF_SIMPLE_OPERATOR (NULL, SCOPE_REF, "sr", OVL_OP_FLAG_NONE)
+DEF_SIMPLE_OPERATOR (NULL, EXPR_PACK_EXPANSION, "sp", OVL_OP_FLAG_NONE)
+DEF_SIMPLE_OPERATOR (NULL, UNARY_LEFT_FOLD_EXPR, "fl", OVL_OP_FLAG_NONE)
+DEF_SIMPLE_OPERATOR (NULL, UNARY_RIGHT_FOLD_EXPR, "fr", OVL_OP_FLAG_NONE)
+DEF_SIMPLE_OPERATOR (NULL, BINARY_LEFT_FOLD_EXPR, "fL", OVL_OP_FLAG_NONE)
+DEF_SIMPLE_OPERATOR (NULL, BINARY_RIGHT_FOLD_EXPR, "fR", OVL_OP_FLAG_NONE)
 
 /* Assignment operators.  */
 DEF_ASSN_OPERATOR ("=", NOP_EXPR, "aS", OVL_OP_FLAG_BINARY)
@@ -149,15 +157,3 @@ DEF_ASSN_OPERATOR ("^=", BIT_XOR_EXPR, "eO", OVL_OP_FLAG_BINARY)
 DEF_ASSN_OPERATOR ("<<=", LSHIFT_EXPR, "lS", OVL_OP_FLAG_BINARY)
 DEF_ASSN_OPERATOR (">>=", RSHIFT_EXPR, "rS", OVL_OP_FLAG_BINARY)
 
-/* Ternary operators.  */
-DEF_SIMPLE_OPERATOR ("?:", COND_EXPR, "qu", OVL_OP_FLAG_NONE)
-
-/* Miscellaneous.  */
-DEF_SIMPLE_OPERATOR ("()", CALL_EXPR, "cl", OVL_OP_FLAG_NONE)
-
-/* Variadic templates extension. */
-DEF_SIMPLE_OPERATOR ("...", EXPR_PACK_EXPANSION, "sp", OVL_OP_FLAG_UNARY)
-DEF_SIMPLE_OPERATOR ("... +", UNARY_LEFT_FOLD_EXPR, "fl", OVL_OP_FLAG_BINARY)
-DEF_SIMPLE_OPERATOR ("+ ...", UNARY_RIGHT_FOLD_EXPR, "fr", OVL_OP_FLAG_BINARY)
-DEF_SIMPLE_OPERATOR ("+ ... +", BINARY_LEFT_FOLD_EXPR, "fL", OVL_OP_FLAG_NONE)
-DEF_SIMPLE_OPERATOR ("+ ... +", BINARY_RIGHT_FOLD_EXPR, "fR", OVL_OP_FLAG_NONE)