cpp_define (pfile, "__cpp_init_captures=201803L");
cpp_define (pfile, "__cpp_generic_lambdas=201707L");
cpp_define (pfile, "__cpp_designated_initializers=201707L");
- cpp_define (pfile, "__cpp_constexpr=201907L");
+ if (cxx_dialect <= cxx20)
+ cpp_define (pfile, "__cpp_constexpr=201907L");
cpp_define (pfile, "__cpp_constexpr_in_decltype=201711L");
cpp_define (pfile, "__cpp_conditional_explicit=201806L");
cpp_define (pfile, "__cpp_consteval=201811L");
/* Set feature test macros for C++23. */
cpp_define (pfile, "__cpp_size_t_suffix=202011L");
cpp_define (pfile, "__cpp_if_consteval=202106L");
+ cpp_define (pfile, "__cpp_constexpr=202110L");
}
if (flag_concepts)
{
explain_non_literal_class (type);
decl = error_mark_node;
}
- else
+ else if (cxx_dialect < cxx23)
{
if (!is_instantiation_of_constexpr (current_function_decl))
{
auto_diagnostic_group d;
error_at (DECL_SOURCE_LOCATION (decl),
"variable %qD of non-literal type %qT in "
- "%<constexpr%> function", decl, type);
+ "%<constexpr%> function only available with "
+ "%<-std=c++2b%> or %<-std=gnu++2b%>", decl, type);
explain_non_literal_class (type);
decl = error_mark_node;
}
r = void_node;
break;
}
+
+ if (VAR_P (r)
+ && (TREE_STATIC (r) || CP_DECL_THREAD_LOCAL_P (r))
+ /* Allow __FUNCTION__ etc. */
+ && !DECL_ARTIFICIAL (r))
+ {
+ gcc_assert (cxx_dialect >= cxx23);
+ if (!ctx->quiet)
+ {
+ if (CP_DECL_THREAD_LOCAL_P (r))
+ error_at (loc, "control passes through declaration of %qD "
+ "with thread storage duration", r);
+ else
+ error_at (loc, "control passes through declaration of %qD "
+ "with static storage duration", r);
+ }
+ *non_constant_p = true;
+ break;
+ }
+
if (AGGREGATE_TYPE_P (TREE_TYPE (r))
|| VECTOR_TYPE_P (TREE_TYPE (r)))
{
break;
case GOTO_EXPR:
- *jump_target = TREE_OPERAND (t, 0);
- gcc_assert (breaks (jump_target) || continues (jump_target)
- /* Allow for jumping to a cdtor_label. */
- || returns (jump_target));
+ if (breaks (&TREE_OPERAND (t, 0))
+ || continues (&TREE_OPERAND (t, 0))
+ /* Allow for jumping to a cdtor_label. */
+ || returns (&TREE_OPERAND (t, 0)))
+ *jump_target = TREE_OPERAND (t, 0);
+ else
+ {
+ gcc_assert (cxx_dialect >= cxx23);
+ if (!ctx->quiet)
+ error_at (loc, "%<goto%> is not a constant expression");
+ *non_constant_p = true;
+ }
break;
case LOOP_EXPR:
tmp = DECL_EXPR_DECL (t);
if (VAR_P (tmp) && !DECL_ARTIFICIAL (tmp))
{
- if (TREE_STATIC (tmp))
+ if (CP_DECL_THREAD_LOCAL_P (tmp))
{
if (flags & tf_error)
error_at (DECL_SOURCE_LOCATION (tmp), "%qD declared "
- "%<static%> in %<constexpr%> context", tmp);
+ "%<thread_local%> in %<constexpr%> context", tmp);
return false;
}
- else if (CP_DECL_THREAD_LOCAL_P (tmp))
+ else if (TREE_STATIC (tmp))
{
if (flags & tf_error)
error_at (DECL_SOURCE_LOCATION (tmp), "%qD declared "
- "%<thread_local%> in %<constexpr%> context", tmp);
+ "%<static%> in %<constexpr%> context", tmp);
return false;
}
else if (!check_for_uninitialized_const_var
case LABEL_EXPR:
t = LABEL_EXPR_LABEL (t);
- if (DECL_ARTIFICIAL (t))
+ if (DECL_ARTIFICIAL (t) || cxx_dialect >= cxx23)
return true;
else if (flags & tf_error)
- error_at (loc, "label definition is not a constant expression");
+ error_at (loc, "label definition in %<constexpr%> function only "
+ "available with %<-std=c++2b%> or %<-std=gnu++2b%>");
return false;
case ANNOTATE_EXPR:
}
if (current_function_decl && VAR_P (decl)
- && DECL_DECLARED_CONSTEXPR_P (current_function_decl))
+ && DECL_DECLARED_CONSTEXPR_P (current_function_decl)
+ && cxx_dialect < cxx23)
{
bool ok = false;
if (CP_DECL_THREAD_LOCAL_P (decl))
error_at (DECL_SOURCE_LOCATION (decl),
- "%qD declared %<thread_local%> in %qs function", decl,
+ "%qD declared %<thread_local%> in %qs function only "
+ "available with %<-std=c++2b%> or %<-std=gnu++2b%>", decl,
DECL_IMMEDIATE_FUNCTION_P (current_function_decl)
? "consteval" : "constexpr");
else if (TREE_STATIC (decl))
error_at (DECL_SOURCE_LOCATION (decl),
- "%qD declared %<static%> in %qs function", decl,
+ "%qD declared %<static%> in %qs function only available "
+ "with %<-std=c++2b%> or %<-std=gnu++2b%>", decl,
DECL_IMMEDIATE_FUNCTION_P (current_function_decl)
? "consteval" : "constexpr");
else
case RID_GOTO:
if (parser->in_function_body
- && DECL_DECLARED_CONSTEXPR_P (current_function_decl))
+ && DECL_DECLARED_CONSTEXPR_P (current_function_decl)
+ && cxx_dialect < cxx23)
{
- error ("%<goto%> in %<constexpr%> function");
+ error ("%<goto%> in %<constexpr%> function only available with "
+ "%<-std=c++2b%> or %<-std=gnu++2b%>");
cp_function_chain->invalid_constexpr = true;
}
constexpr int
f ()
{
-x: // { dg-error "label definition is not a constant expression" }
+x: // { dg-error "label definition in 'constexpr' function only available with" "" { target c++20_down } }
return 42;
}
constexpr int f(int i) {
static int j = i; // { dg-error "static" }
- thread_local int l = i; // { dg-error "thread_local" }
- goto foo; // { dg-error "goto" }
+ thread_local int l = i; // { dg-error "thread_local" "" { target c++20_down } }
+ goto foo; // { dg-error "goto" "" { target c++20_down } }
foo:
asm("foo"); // { dg-error "asm" "" { target c++17_down } }
int k; // { dg-error "uninitialized" "" { target c++17_down } }
- A a; // { dg-error "non-literal" }
+ A a; // { dg-error "non-literal" "" { target c++20_down } }
return i;
}
--- /dev/null
+// P2242R3
+// { dg-do compile { target c++14 } }
+
+constexpr int
+foo ()
+{
+lab: // { dg-error "label definition in 'constexpr' function only available with" "" { target c++20_down } }
+ return 1;
+}
+
+constexpr int
+bar (int x)
+{
+ if (x)
+ goto lab; // { dg-error "'goto' in 'constexpr' function only available with" "" { target c++20_down } }
+ return 1;
+lab:
+ return 0;
+}
+
+constexpr int
+baz (int x)
+{
+ if (!x)
+ return 1;
+ static int a; // { dg-error "'a' declared 'static' in 'constexpr' function only available with" "" { target c++20_down } }
+ return ++a; // { dg-error "uninitialized variable 'a' in 'constexpr' function" "" { target c++17_down } .-1 }
+}
+
+constexpr int
+qux (int x)
+{
+ if (!x)
+ return 1;
+ thread_local int a; // { dg-error "'a' declared 'thread_local' in 'constexpr' function only available with" "" { target c++20_down } }
+ return ++a; // { dg-error "uninitialized variable 'a' in 'constexpr' function" "" { target c++17_down } .-1 }
+}
+
+constexpr int
+garply (int x)
+{
+ if (!x)
+ return 1;
+ extern thread_local int a; // { dg-error "'a' declared 'thread_local' in 'constexpr' function only available with" "" { target c++20_down } }
+ return ++a;
+}
+
+struct S { S (); ~S (); int s; }; // { dg-message "'S' is not literal because:" "" { target c++20_down } }
+ // { dg-message "'S' has a non-trivial destructor" "" { target c++17_down } .-1 }
+ // { dg-message "'S' does not have 'constexpr' destructor" "" { target { c++20_only } } .-2 }
+
+constexpr int
+corge (int x)
+{
+ if (!x)
+ return 1;
+ S s; // { dg-error "variable 's' of non-literal type 'S' in 'constexpr' function only available with" "" { target c++20_down } }
+ return 0;
+}
+
+#if __cpp_constexpr >= 202110L
+static_assert (foo ());
+static_assert (bar (0));
+static_assert (baz (0));
+static_assert (qux (0));
+static_assert (garply (0));
+static_assert (corge (0));
+#endif
--- /dev/null
+// P2242R3
+// { dg-do compile }
+// { dg-options "-std=c++2b" }
+
+constexpr int
+foo ()
+{
+lab:
+ return 1;
+}
+
+constexpr int
+bar (int x)
+{
+ if (x)
+ goto lab; // { dg-error "'goto' is not a constant expression" }
+ return 1;
+lab:
+ return 0;
+}
+
+constexpr int
+baz (int x)
+{
+ if (!x)
+ return 1;
+ static int a; // { dg-error "control passes through declaration of 'a' with static storage duration" }
+ return ++a;
+}
+
+constexpr int
+qux (int x)
+{
+ if (!x)
+ return 1;
+ thread_local int a; // { dg-error "control passes through declaration of 'a' with thread storage duration" }
+ return ++a;
+}
+
+struct S { S (); ~S (); int s; }; // { dg-message "'S::S\\\(\\\)' declared here" }
+
+constexpr int
+corge (int x)
+{
+ if (!x)
+ return 1;
+ S s; // { dg-error "call to non-'constexpr' function 'S::S\\\(\\\)'" }
+ return 0;
+}
+
+constexpr int a = bar (1); // { dg-message "in 'constexpr' expansion of" }
+constexpr int b = baz (1); // { dg-message "in 'constexpr' expansion of" }
+constexpr int c = qux (1); // { dg-message "in 'constexpr' expansion of" }
+constexpr int d = corge (1); // { dg-message "in 'constexpr' expansion of" }
--- /dev/null
+// P2242R3
+// { dg-do compile { target c++14 } }
+
+constexpr int
+foo ()
+{
+ goto lab; // { dg-error "'goto' in 'constexpr' function only available with" "" { target c++20_down } }
+lab: // { dg-error "'goto' is not a constant expression" "" { target { c++23 } } .-1 }
+ return 1;
+}
--- /dev/null
+// { dg-do compile }
+// { dg-options "-std=c++2b" }
+
+int qux ();
+
+constexpr int
+foo (int x)
+{
+ switch (x)
+ {
+ static int v = qux ();
+ case 12:
+ return 1;
+ }
+ return 0;
+}
+
+constexpr int
+bar (int x)
+{
+ switch (x)
+ {
+ thread_local int v = qux ();
+ case 12:
+ return 1;
+ }
+ return 0;
+}
+
+constexpr int
+baz (int x)
+{
+ switch (x)
+ {
+ static const int v = qux (); // { dg-message "'v' was not initialized with a constant expression" }
+ case 12:
+ return v;
+ }
+ return 0;
+}
+
+constexpr int
+corge (int x)
+{
+ switch (x)
+ {
+ const thread_local int v = qux (); // { dg-message "'v' was not initialized with a constant expression" }
+ case 12:
+ return v;
+ }
+ return 0;
+}
+
+constexpr int a = foo (12);
+constexpr int b = bar (12);
+constexpr int c = baz (12); // { dg-error "the value of 'v' is not usable in a constant expression" }
+constexpr int d = corge (12); // { dg-error "the value of 'v' is not usable in a constant expression" }
--- /dev/null
+// { dg-do compile }
+// { dg-options "-std=c++2b" }
+
+int qux ();
+
+constexpr int
+foo (int x)
+{
+ switch (x)
+ {
+ static const int v = 6;
+ case 12:
+ return v;
+ }
+ return 0;
+}
+
+constexpr int
+bar (int x)
+{
+ switch (x)
+ {
+ thread_local const int v = 7;
+ case 12:
+ return 7;
+ }
+ return 0;
+}
+
+constexpr int
+baz (int x)
+{
+ switch (x)
+ {
+ static int v = 6; // { dg-message "int v' is not const" }
+ case 12:
+ return v;
+ }
+ return 0;
+}
+
+constexpr int
+corge (int x)
+{
+ switch (x)
+ {
+ thread_local int v = 6; // { dg-message "int v' is not const" }
+ case 12:
+ return v;
+ }
+ return 0;
+}
+
+constexpr int a = foo (12);
+constexpr int b = bar (12);
+constexpr int c = baz (12); // { dg-error "the value of 'v' is not usable in a constant expression" }
+constexpr int d = corge (12); // { dg-error "the value of 'v' is not usable in a constant expression" }
--- /dev/null
+// P2242R3
+// { dg-do compile }
+// { dg-options "-std=c++2b" }
+
+constexpr int
+foo ()
+{
+ goto lab; // { dg-error "'goto' is not a constant expression" }
+lab:
+ return 1;
+}
+
+constexpr int
+bar ()
+{
+ static int a; // { dg-error "'a' declared 'static' in 'constexpr' context" }
+ return ++a;
+}
+
+constexpr int
+baz (int x)
+{
+ thread_local int a; // { dg-error "'a' declared 'thread_local' in 'constexpr' context" }
+ return ++a;
+}
#ifndef __cpp_constexpr
# error "__cpp_constexpr"
-#elif __cpp_constexpr != 201907
-# error "__cpp_constexpr != 201907"
+#elif __cpp_constexpr != 202110
+# error "__cpp_constexpr != 202110"
#endif
#ifndef __cpp_decltype_auto
-// { dg-do compile }
-// { dg-options "-std=c++2a" }
+// { dg-do compile { target c++20 } }
struct S { S () : a (0), b (1) {} int a, b; };
int f1 (); // { dg-message "previous declaration 'int f1\\(\\)'" }
consteval int
f13 (int x)
{
- static int a = 5; // { dg-error "'a' declared 'static' in 'consteval' function" }
- thread_local int b = 6; // { dg-error "'b' declared 'thread_local' in 'consteval' function" }
+ static int a = 5; // { dg-error "'a' declared 'static' in 'consteval' function only available with" "" { target c++20_only } }
+ // { dg-error "'a' declared 'static' in 'constexpr' context" "" { target c++23 } .-1 }
+ thread_local int b = 6; // { dg-error "'b' declared 'thread_local' in 'consteval' function only available with" "" { target c++20_only } }
return x;
}
constexpr int
f8 ()
{
- T t4; // { dg-error "variable 't4' of non-literal type 'T' in 'constexpr' function" }
+ T t4; // { dg-error "variable 't4' of non-literal type 'T' in 'constexpr' function only available with" "" { target c++20_down } }
return 0;
}
constexpr int foo ()
try { // { dg-warning "function-try-block body of 'constexpr' function only available with" "" { target c++17_down } }
int a; // { dg-error "uninitialized variable 'a' in 'constexpr' function" "" { target c++17_down } }
- static double b = 1.0;// { dg-error "'b' declared 'static' in 'constexpr' function" }
- goto l; // { dg-error "'goto' in 'constexpr' function" }
+ static double b = 1.0;// { dg-error "'b' declared 'static' in 'constexpr' function only available with" "" { target c++20_down } }
+ // { dg-error "'b' declared 'static' in 'constexpr' context" "" { target c++23 } .-1 }
+ goto l; // { dg-error "'goto' in 'constexpr' function only available with" "" { target c++20_down } }
l:;
return 0;
} catch (...) {
long int c; // { dg-error "uninitialized variable 'c' in 'constexpr' function" "" { target c++17_down } }
- static float d = 2.0f;// { dg-error "'d' declared 'static' in 'constexpr' function" }
- goto l2; // { dg-error "'goto' in 'constexpr' function" }
+ static float d = 2.0f;// { dg-error "'d' declared 'static' in 'constexpr' function only available with" "" { target c++20_down } }
+ goto l2; // { dg-error "'goto' in 'constexpr' function only available with" "" { target c++20_down } }
l2:;
return -1;
}
constexpr int bar ()
{
int a; // { dg-error "uninitialized variable 'a' in 'constexpr' function" "" { target c++17_down } }
- static long double b = 3.0;// { dg-error "'b' declared 'static' in 'constexpr' function" }
- goto l; // { dg-error "'goto' in 'constexpr' function" }
+ static long double b = 3.0;// { dg-error "'b' declared 'static' in 'constexpr' function only available with" "" { target c++20_down } }
+ // { dg-error "'b' declared 'static' in 'constexpr' context" "" { target c++23 } .-1 }
+ goto l; // { dg-error "'goto' in 'constexpr' function only available with" "" { target c++20_down } }
l:;
try { // { dg-warning "'try' in 'constexpr' function only available with" "" { target c++17_down } }
short c; // { dg-error "uninitialized variable 'c' in 'constexpr' function" "" { target c++17_down } }
- static float d; // { dg-error "'d' declared 'static' in 'constexpr' function" }
+ static float d; // { dg-error "'d' declared 'static' in 'constexpr' function only available with" "" { target c++20_down } }
// { dg-error "uninitialized variable 'd' in 'constexpr' function" "" { target c++17_down } .-1 }
- goto l2; // { dg-error "'goto' in 'constexpr' function" }
+ goto l2; // { dg-error "'goto' in 'constexpr' function only available with" "" { target c++20_down } }
l2:;
return 0;
} catch (int) {
char e; // { dg-error "uninitialized variable 'e' in 'constexpr' function" "" { target c++17_down } }
- static int f = 5; // { dg-error "'f' declared 'static' in 'constexpr' function" }
- goto l3; // { dg-error "'goto' in 'constexpr' function" }
+ static int f = 5; // { dg-error "'f' declared 'static' in 'constexpr' function only available with" "" { target c++20_down } }
+ goto l3; // { dg-error "'goto' in 'constexpr' function only available with" "" { target c++20_down } }
l3:;
return 1;
}
// { dg-do compile { target c++11 } }
-constexpr int foo() { thread_local int i __attribute__((unused)) {}; return 1; } // { dg-error "40:.i. declared .thread_local." }
+constexpr int foo() { thread_local int i __attribute__((unused)) {}; return 1; } // { dg-error "40:.i. declared .thread_local." "" { target c++20_down } }
+// { dg-error "40:.i. declared .thread_local. in .constexpr. context" "" { target c++23 } .-1 }
-constexpr int bar() { static int i __attribute__((unused)) {}; return 1; } // { dg-error "34:.i. declared .static." }
+constexpr int bar() { static int i __attribute__((unused)) {}; return 1; } // { dg-error "34:.i. declared .static." "" { target c++20_down } }
+// { dg-error "34:.i. declared .static. in .constexpr. context" "" { target c++23 } .-1 }
projects / thirdparty / gcc.git / commitdiff
