head	1.1;
branch	1.1.1;
access;
symbols
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	LLVM:1.1.1;
locks; strict;
comment	@// @;


1.1
date	2015.01.29.19.57.35;	author joerg;	state Exp;
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1.1.1.3
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1.1.1.3.4.2
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desc
@@


1.1
log
@Initial revision
@
text
@// RUN: %clang_cc1 -std=c++1z -verify %s

template<typename ...T> constexpr auto sum(T ...t) { return (... + t); }
template<typename ...T> constexpr auto product(T ...t) { return (t * ...); }
template<typename ...T> constexpr auto all(T ...t) { return (true && ... && t); }
template<typename ...T> constexpr auto all2(T ...t) { return (t && ... && true); }

int k1 = (1 + ... + 2); // expected-error {{does not contain any unexpanded parameter packs}}
int k2 = (1 + ...); // expected-error {{does not contain any unexpanded parameter packs}}
int k3 = (... + 2); // expected-error {{does not contain any unexpanded parameter packs}}

template<int ...N> void bad1() { (N + ... + N); } // expected-error {{unexpanded parameter packs in both operands}}
// FIXME: it would be reasonable to support this as an extension.
template<int ...N> void bad2() { (2 * N + ... + 1); } // expected-error {{expression not permitted as operand}}
template<int ...N> void bad3() { (2 + N * ... * 1); } // expected-error {{expression not permitted as operand}}
template<int ...N, int ...M> void bad4(int (&...x)[N]) { (N + M * ... * 1); } // expected-error {{expression not permitted as operand}}
template<int ...N, int ...M> void fixed4(int (&...x)[N]) { ((N + M) * ... * 1); }

// Parens are mandatory.
template<int ...N> void bad5() { N + ...; } // expected-error {{expected expression}} expected-error +{{}}
template<int ...N> void bad6() { ... + N; } // expected-error {{expected expression}}
template<int ...N> void bad7() { N + ... + N; } // expected-error {{expected expression}} expected-error +{{}}

// Must have a fold-operator in the relevant places.
template<int ...N> int bad8() { return (N + ... * 3); } // expected-error {{operators in fold expression must be the same}}
template<int ...N> int bad9() { return (3 + ... * N); } // expected-error {{operators in fold expression must be the same}}
template<int ...N> int bad10() { return (3 ? ... : N); } // expected-error +{{}} expected-note {{to match}}
template<int ...N> int bad11() { return (N + ... 0); } // expected-error {{expected a foldable binary operator}} expected-error {{expected expression}}
template<int ...N> int bad12() { return (... N); } // expected-error {{expected expression}}
@


1.1.1.1
log
@Import Clang 3.6RC1 r227398.
@
text
@@


1.1.1.1.4.1
log
@Sync with HEAD
@
text
@a11 3
struct A { A(int); friend A operator+(A, A); A operator-(A); A operator()(A); A operator[](A); };
A operator*(A, A);

a17 4
template<typename ...T> void bad4a(T ...t) { (t * 2 + ... + 1); } // expected-error {{expression not permitted as operand}}
template<int ...N> void bad4b() { (A(0) + A(N) + ...); } // expected-error {{expression not permitted as operand}}
template<int ...N> void bad4c() { (A(0) - A(N) + ...); } // expected-error {{expression not permitted as operand}}
template<int ...N> void bad4d() { (A(0)(A(0)) + ... + A(0)[A(N)]); }
@


1.1.1.2
log
@Import Clang pre-4.0.0 r291444.
@
text
@a11 3
struct A { A(int); friend A operator+(A, A); A operator-(A); A operator()(A); A operator[](A); };
A operator*(A, A);

a17 4
template<typename ...T> void bad4a(T ...t) { (t * 2 + ... + 1); } // expected-error {{expression not permitted as operand}}
template<int ...N> void bad4b() { (A(0) + A(N) + ...); } // expected-error {{expression not permitted as operand}}
template<int ...N> void bad4c() { (A(0) - A(N) + ...); } // expected-error {{expression not permitted as operand}}
template<int ...N> void bad4d() { (A(0)(A(0)) + ... + A(0)[A(N)]); }
@


1.1.1.3
log
@Import clang r309604 from branches/release_50
@
text
@a36 9

template<typename ...T> void as_operand_of_cast(int a, T ...t) {
  return
    (int)(a + ... + undeclared_junk) + // expected-error {{undeclared}} expected-error {{does not contain any unexpanded}}
    (int)(t + ... + undeclared_junk) + // expected-error {{undeclared}}
    (int)(... + undeclared_junk) + // expected-error {{undeclared}} expected-error {{does not contain any unexpanded}}
    (int)(undeclared_junk + ...) + // expected-error {{undeclared}}
    (int)(a + ...); // expected-error {{does not contain any unexpanded}}
}
@


1.1.1.3.4.1
log
@Sync with HEAD
@
text
@a45 17

// fold-operator can be '>' or '>>'.
template <int... N> constexpr bool greaterThan() { return (N > ...); }
template <int... N> constexpr int rightShift() { return (N >> ...); }

static_assert(greaterThan<2, 1>());
static_assert(rightShift<10, 1>() == 5);

template <auto V> constexpr auto Identity = V;

// Support fold operators within templates.
template <int... N> constexpr int nestedFoldOperator() {
  return Identity<(Identity<0> >> ... >> N)> +
    Identity<(N >> ... >> Identity<0>)>;
}

static_assert(nestedFoldOperator<3, 1>() == 1);
@


1.1.1.3.4.2
log
@Mostly merge changes from HEAD upto 20200411
@
text
@@


1.1.1.3.2.1
log
@Sync with HEAD
@
text
@a45 17

// fold-operator can be '>' or '>>'.
template <int... N> constexpr bool greaterThan() { return (N > ...); }
template <int... N> constexpr int rightShift() { return (N >> ...); }

static_assert(greaterThan<2, 1>());
static_assert(rightShift<10, 1>() == 5);

template <auto V> constexpr auto Identity = V;

// Support fold operators within templates.
template <int... N> constexpr int nestedFoldOperator() {
  return Identity<(Identity<0> >> ... >> N)> +
    Identity<(N >> ... >> Identity<0>)>;
}

static_assert(nestedFoldOperator<3, 1>() == 1);
@


1.1.1.4
log
@Import clang r337282 from trunk
@
text
@a45 17

// fold-operator can be '>' or '>>'.
template <int... N> constexpr bool greaterThan() { return (N > ...); }
template <int... N> constexpr int rightShift() { return (N >> ...); }

static_assert(greaterThan<2, 1>());
static_assert(rightShift<10, 1>() == 5);

template <auto V> constexpr auto Identity = V;

// Support fold operators within templates.
template <int... N> constexpr int nestedFoldOperator() {
  return Identity<(Identity<0> >> ... >> N)> +
    Identity<(N >> ... >> Identity<0>)>;
}

static_assert(nestedFoldOperator<3, 1>() == 1);
@


1.1.1.5
log
@Mark old LLVM instance as dead.
@
text
@@


1.1.1.1.2.1
log
@file cxx1z-fold-expressions.cpp was added on branch netbsd-7 on 2015-06-04 20:04:43 +0000
@
text
@d1 29
@


1.1.1.1.2.2
log
@Update LLVM to 3.6.1, requested by joerg in ticket 824.
@
text
@a0 29
// RUN: %clang_cc1 -std=c++1z -verify %s

template<typename ...T> constexpr auto sum(T ...t) { return (... + t); }
template<typename ...T> constexpr auto product(T ...t) { return (t * ...); }
template<typename ...T> constexpr auto all(T ...t) { return (true && ... && t); }
template<typename ...T> constexpr auto all2(T ...t) { return (t && ... && true); }

int k1 = (1 + ... + 2); // expected-error {{does not contain any unexpanded parameter packs}}
int k2 = (1 + ...); // expected-error {{does not contain any unexpanded parameter packs}}
int k3 = (... + 2); // expected-error {{does not contain any unexpanded parameter packs}}

template<int ...N> void bad1() { (N + ... + N); } // expected-error {{unexpanded parameter packs in both operands}}
// FIXME: it would be reasonable to support this as an extension.
template<int ...N> void bad2() { (2 * N + ... + 1); } // expected-error {{expression not permitted as operand}}
template<int ...N> void bad3() { (2 + N * ... * 1); } // expected-error {{expression not permitted as operand}}
template<int ...N, int ...M> void bad4(int (&...x)[N]) { (N + M * ... * 1); } // expected-error {{expression not permitted as operand}}
template<int ...N, int ...M> void fixed4(int (&...x)[N]) { ((N + M) * ... * 1); }

// Parens are mandatory.
template<int ...N> void bad5() { N + ...; } // expected-error {{expected expression}} expected-error +{{}}
template<int ...N> void bad6() { ... + N; } // expected-error {{expected expression}}
template<int ...N> void bad7() { N + ... + N; } // expected-error {{expected expression}} expected-error +{{}}

// Must have a fold-operator in the relevant places.
template<int ...N> int bad8() { return (N + ... * 3); } // expected-error {{operators in fold expression must be the same}}
template<int ...N> int bad9() { return (3 + ... * N); } // expected-error {{operators in fold expression must be the same}}
template<int ...N> int bad10() { return (3 ? ... : N); } // expected-error +{{}} expected-note {{to match}}
template<int ...N> int bad11() { return (N + ... 0); } // expected-error {{expected a foldable binary operator}} expected-error {{expected expression}}
template<int ...N> int bad12() { return (... N); } // expected-error {{expected expression}}
@


