// RUN: %clang_cc1 -triple x86_64-linux -fexperimental-new-constant-interpreter -verify=both,expected -std=c++11 %s // RUN: %clang_cc1 -triple x86_64-linux -verify=both,ref -std=c++11 %s namespace IntOrEnum { const int k = 0; const int &p = k; template struct S {}; S

s; } const int cval = 2; template struct C{}; template struct C; /// FIXME: This example does not get properly diagnosed in the new interpreter. extern const int recurse1; const int recurse2 = recurse1; // both-note {{here}} const int recurse1 = 1; int array1[recurse1]; int array2[recurse2]; // both-warning {{variable length arrays in C++}} \ // both-note {{initializer of 'recurse2' is not a constant expression}} \ // expected-error {{variable length array declaration not allowed at file scope}} \ // ref-warning {{variable length array folded to constant array as an extension}} struct S { int m; }; constexpr S s = { 5 }; constexpr const int *p = &s.m + 1; constexpr const int *np2 = &(*(int(*)[4])nullptr)[0]; // ok constexpr int preDec(int x) { // both-error {{never produces a constant expression}} return --x; // both-note {{subexpression}} } constexpr int postDec(int x) { // both-error {{never produces a constant expression}} return x--; // both-note {{subexpression}} } constexpr int preInc(int x) { // both-error {{never produces a constant expression}} return ++x; // both-note {{subexpression}} } constexpr int postInc(int x) { // both-error {{never produces a constant expression}} return x++; // both-note {{subexpression}} } namespace ReferenceToConst { template struct S; // both-note 1{{here}} struct LiteralType { constexpr LiteralType(int n) : n(n) {} int n; }; template struct T { T() { static const int ki = 42; const int &i2 = ki; typename S::T check5; // both-error {{undefined template}} } }; } namespace GH50055 { // Enums without fixed underlying type enum E1 {e11=-4, e12=4}; enum E2 {e21=0, e22=4}; enum E3 {e31=-4, e32=1024}; enum E4 {e41=0}; // Empty but as-if it had a single enumerator with value 0 enum EEmpty {}; // Enum with fixed underlying type because the underlying type is explicitly specified enum EFixed : int {efixed1=-4, efixed2=4}; // Enum with fixed underlying type because it is scoped enum class EScoped {escoped1=-4, escoped2=4}; enum EMaxInt {emaxint1=-1, emaxint2=__INT_MAX__}; enum NumberType {}; E2 testDefaultArgForParam(E2 e2Param = (E2)-1) { // ok, not a constant expression context E2 e2LocalInit = e2Param; // ok, not a constant expression context return e2LocalInit; } // #include void testValueInRangeOfEnumerationValues() { constexpr E1 x1 = static_cast(-8); constexpr E1 x2 = static_cast(8); // both-error@-1 {{constexpr variable 'x2' must be initialized by a constant expression}} // both-note@-2 {{integer value 8 is outside the valid range of values [-8, 7] for the enumeration type 'E1'}} E1 x2b = static_cast(8); // ok, not a constant expression context constexpr E2 x3 = static_cast(-8); // both-error@-1 {{constexpr variable 'x3' must be initialized by a constant expression}} // both-note@-2 {{integer value -8 is outside the valid range of values [0, 7] for the enumeration type 'E2'}} constexpr E2 x4 = static_cast(0); constexpr E2 x5 = static_cast(8); // both-error@-1 {{constexpr variable 'x5' must be initialized by a constant expression}} // both-note@-2 {{integer value 8 is outside the valid range of values [0, 7] for the enumeration type 'E2'}} constexpr E3 x6 = static_cast(-2048); constexpr E3 x7 = static_cast(-8); constexpr E3 x8 = static_cast(0); constexpr E3 x9 = static_cast(8); constexpr E3 x10 = static_cast(2048); // both-error@-1 {{constexpr variable 'x10' must be initialized by a constant expression}} // both-note@-2 {{integer value 2048 is outside the valid range of values [-2048, 2047] for the enumeration type 'E3'}} constexpr E4 x11 = static_cast(0); constexpr E4 x12 = static_cast(1); constexpr E4 x13 = static_cast(2); // both-error@-1 {{constexpr variable 'x13' must be initialized by a constant expression}} // both-note@-2 {{integer value 2 is outside the valid range of values [0, 1] for the enumeration type 'E4'}} constexpr EEmpty x14 = static_cast(0); constexpr EEmpty x15 = static_cast(1); constexpr EEmpty x16 = static_cast(2); // both-error@-1 {{constexpr variable 'x16' must be initialized by a constant expression}} // both-note@-2 {{integer value 2 is outside the valid range of values [0, 1] for the enumeration type 'EEmpty'}} constexpr EFixed x17 = static_cast(100); constexpr EScoped x18 = static_cast(100); constexpr EMaxInt x19 = static_cast(__INT_MAX__-1); constexpr EMaxInt x20 = static_cast((long)__INT_MAX__+1); // both-error@-1 {{constexpr variable 'x20' must be initialized by a constant expression}} // both-note@-2 {{integer value 2147483648 is outside the valid range of values [-2147483648, 2147483647] for the enumeration type 'EMaxInt'}} const NumberType neg_one = (NumberType) ((NumberType) 0 - (NumberType) 1); // ok, not a constant expression context } template struct Bitfield { static constexpr T max = static_cast((1 << size) - 1); // both-error@-1 {{constexpr variable 'max' must be initialized by a constant expression}} // both-note@-2 {{integer value 15 is outside the valid range of values [0, 7] for the enumeration type 'E2'}} }; void testValueInRangeOfEnumerationValuesViaTemplate() { Bitfield good; Bitfield bad; // both-note {{in instantiation}} } enum SortOrder { AscendingOrder, DescendingOrder }; class A { static void f(SortOrder order); }; void A::f(SortOrder order) { if (order == SortOrder(-1)) // ok, not a constant expression context return; } } namespace FinalLtorDiags { template struct A {}; // both-note {{template parameter is declared here}} int k; int *q = &k; // both-note {{declared here}} A c; // both-error {{non-type template argument of type 'int *' is not a constant expression}} \ // both-note {{read of non-constexpr variable 'q' is not allowed in a constant expression}} } void lambdas() { int d; int a9[1] = {[d = 0] = 1}; // both-error {{not an integral constant expression}} }