+2019-03-21 Jakub Jelinek <jakub@redhat.com>
+
+ PR c++/89767
+ * parser.c (cp_parser_lambda_introducer): Add ids and first_capture_id
+ variables, check for duplicates in this function.
+ * lambda.c (add_capture): Don't check for duplicates nor use
+ IDENTIFIER_MARKED.
+ (register_capture_members): Don't clear IDENTIFIER_MARKED here.
+
2019-03-21 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/89571
IDENTIFIER_LENGTH (id) + 1);
name = get_identifier (buf);
- /* If TREE_TYPE isn't set, we're still in the introducer, so check
- for duplicates. */
- if (!LAMBDA_EXPR_CLOSURE (lambda))
- {
- if (IDENTIFIER_MARKED (name))
- {
- pedwarn (input_location, 0,
- "already captured %qD in lambda expression", id);
- return NULL_TREE;
- }
- IDENTIFIER_MARKED (name) = true;
- }
-
if (variadic)
type = make_pack_expansion (type);
if (PACK_EXPANSION_P (field))
field = PACK_EXPANSION_PATTERN (field);
- /* We set this in add_capture to avoid duplicates. */
- IDENTIFIER_MARKED (DECL_NAME (field)) = false;
finish_member_declaration (field);
}
error ("non-local lambda expression cannot have a capture-default");
}
+ hash_set<tree, true> ids;
+ tree first_capture_id = NULL_TREE;
while (cp_lexer_next_token_is_not (parser->lexer, CPP_CLOSE_SQUARE))
{
cp_token* capture_token;
pedwarn (loc, 0, "explicit by-copy capture of %<this%> redundant "
"with by-copy capture default");
cp_lexer_consume_token (parser->lexer);
- add_capture (lambda_expr,
- /*id=*/this_identifier,
- /*initializer=*/finish_this_expr (),
- /*by_reference_p=*/true,
- explicit_init_p);
+ if (LAMBDA_EXPR_THIS_CAPTURE (lambda_expr))
+ pedwarn (input_location, 0,
+ "already captured %qD in lambda expression",
+ this_identifier);
+ else
+ add_capture (lambda_expr, /*id=*/this_identifier,
+ /*initializer=*/finish_this_expr (),
+ /*by_reference_p=*/true, explicit_init_p);
continue;
}
"%<-std=c++17%> or %<-std=gnu++17%>");
cp_lexer_consume_token (parser->lexer);
cp_lexer_consume_token (parser->lexer);
- add_capture (lambda_expr,
- /*id=*/this_identifier,
- /*initializer=*/finish_this_expr (),
- /*by_reference_p=*/false,
- explicit_init_p);
+ if (LAMBDA_EXPR_THIS_CAPTURE (lambda_expr))
+ pedwarn (input_location, 0,
+ "already captured %qD in lambda expression",
+ this_identifier);
+ else
+ add_capture (lambda_expr, /*id=*/this_identifier,
+ /*initializer=*/finish_this_expr (),
+ /*by_reference_p=*/false, explicit_init_p);
continue;
}
"default", capture_id);
}
- add_capture (lambda_expr,
- capture_id,
- capture_init_expr,
- /*by_reference_p=*/capture_kind == BY_REFERENCE,
- explicit_init_p);
+ /* Check for duplicates.
+ Optimize for the zero or one explicit captures cases and only create
+ the hash_set after adding second capture. */
+ bool found = false;
+ if (ids.elements ())
+ found = ids.add (capture_id);
+ else if (first_capture_id == NULL_TREE)
+ first_capture_id = capture_id;
+ else if (capture_id == first_capture_id)
+ found = true;
+ else
+ {
+ ids.add (first_capture_id);
+ ids.add (capture_id);
+ }
+ if (found)
+ pedwarn (input_location, 0,
+ "already captured %qD in lambda expression", capture_id);
+ else
+ add_capture (lambda_expr, capture_id, capture_init_expr,
+ /*by_reference_p=*/capture_kind == BY_REFERENCE,
+ explicit_init_p);
/* If there is any qualification still in effect, clear it
now; we will be starting fresh with the next capture. */
+2019-03-21 Jakub Jelinek <jakub@redhat.com>
+
+ PR c++/89767
+ * g++.dg/cpp1y/lambda-init18.C: New test.
+ * g++.dg/cpp1y/lambda-init19.C: New test.
+ * g++.dg/cpp1y/pr89767.C: New test.
+
2019-03-21 Thomas Schwinge <thomas@codesourcery.com>
Cesar Philippidis <cesar@codesourcery.com>
--- /dev/null
+// PR c++/89767
+// { dg-do compile { target c++14 } }
+
+void bar (int);
+
+void
+foo ()
+{
+ int x = 0;
+ auto z = [x, y = [x] { bar (x); }] { y (); bar (x); };
+ z ();
+}
--- /dev/null
+// PR c++/89767
+// { dg-do compile { target c++14 } }
+
+void bar (int);
+
+void
+foo ()
+{
+ int x = 0;
+ int a = 0, b = 0, c = 0, d = 0, e = 0, f = 0, g = 0, h = 0;
+ auto z = [x, y = [x] { bar (x); }, x] { y (); bar (x); }; // { dg-error "already captured 'x' in lambda expression" }
+ auto w = [x, a, b, c, d, y = [x] { bar (x); }, e, f, g, h, x] { y (); bar (x + a + b + c + d + e + f + g + h); }; // { dg-error "already captured 'x' in lambda expression" }
+ z ();
+ w ();
+}
--- /dev/null
+// PR c++/89767
+// { dg-do compile { target c++14 } }
+// { dg-options "-O2 -Wall" }
+
+template <typename d> struct e { using g = d; };
+template <typename d, template <typename> class> using h = e<d>;
+template <typename d, template <typename> class i>
+using j = typename h<d, i>::g;
+template <typename c> int k(c);
+template <typename...> class au;
+struct l { template <typename c> using m = typename c::f; };
+struct s : l { using af = j<au<int, int> *, m>; };
+template <unsigned long, typename> struct o;
+template <long p, typename c> using q = typename o<p, c>::g;
+template <typename> struct r;
+template <typename c> struct r<c *> { typedef c aj; };
+template <typename ak, typename> struct al { typename r<ak>::aj operator*(); void operator++(); };
+template <typename am, typename an, typename ao>
+bool operator!=(al<am, ao>, al<an, ao>);
+template <unsigned long, typename...> struct ap;
+template <unsigned long aq, typename ar, typename... as>
+struct ap<aq, ar, as...> : ap<1, as...> {};
+template <unsigned long aq, typename ar> struct ap<aq, ar> {};
+template <typename... at> class au : public ap<0, at...> {};
+template <unsigned long p, typename ar, typename... as>
+struct o<p, au<ar, as...>> : o<p - 1, au<as...>> {};
+template <typename ar, typename... as> struct o<0, au<ar, as...>> { typedef ar g; };
+template <long p, typename ar> constexpr ar av(ap<p, ar> __t) { return ar (); }
+template <int p, typename... at> constexpr q<p, au<at...>> aw(au<at...> __t) { av<p>(__t); return q<p, au<at...>> (); }
+struct bg { typedef s::af af; };
+struct F { typedef al<bg::af, int> bk; bk begin(); bk end(); };
+void bo() { int t = 0; F cv; for (auto bp : cv) [t, n = k(aw<1>(bp))] {}; }
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