Author
anonymous
over 5 years ago
Language
C++
Compiler
clang HEAD 10.0.0 (https://github.com/llvm-mirror/clang.git 65acf43270ea2894dffa0d0b292b92402f80c8cb) (https://github.com/llvm-mirror/llvm.git 2c4ca6832fa6b306ee6a7010bfb80a3f2596f824)
Options
Warnings
Boost 1.71.0
C++2a(GNU)
no pedantic
Author
anonymous
over 5 years ago
$ clang++ prog.cc -Wall -Wextra -I/opt/wandbox/boost-1.71.0/clang-head/include -std=gnu++2a prog.cc:7:11: error: cannot combine with previous 'constinit' declaration specifier
constinit constexpr int L = 1; //ng、constinitとconstexprを同時に指定できない
^
prog.cc:12:18: error: variable does not have a constant initializer
constinit double PI2 = PI + PI; //ng、変数PIは定数式で利用不可
^ ~~~~~~~
prog.cc:12:1: note: required by 'constinit' specifier here
constinit double PI2 = PI + PI; //ng、変数PIは定数式で利用不可
^~~~~~~~~
prog.cc:12:24: note: read of non-constexpr variable 'PI' is not allowed in a constant expression
constinit double PI2 = PI + PI; //ng、変数PIは定数式で利用不可
^
prog.cc:11:24: note: declared here
constinit const double PI = 3.1415; //ok
^
prog.cc:20:22: warning: 'extern' variable has an initializer [-Wextern-initializer]
constinit extern int def = 10; //ok
^
prog.cc:30:14: warning: 'constinit' specifier missing on initializing declaration of 'x' [-Wmissing-constinit]
const int S::x = 12; //ok、constinit変数なので定数初期化される
^
constinit
prog.cc:25:3: note: variable declared constinit here
constinit static const int x;
^
prog.cc:32:11: error: cannot combine with previous 'constinit' declaration specifier
constinit constexpr int S::z; //ng、インライン変数に対する多重定義
^
prog.cc:32:1: error: 'constinit' specifier added after initialization of variable
constinit constexpr int S::z; //ng、インライン変数に対する多重定義
^~~~~~~~~~
prog.cc:27:24: note: add the 'constinit' specifier to the initializing declaration here
static constexpr int z = 56;
^
constinit
prog.cc:32:28: error: redefinition of 'z' with a different type: 'int' vs 'const int'
constinit constexpr int S::z; //ng、インライン変数に対する多重定義
^
prog.cc:27:24: note: previous definition is here
static constexpr int z = 56;
^
prog.cc:37:39: error: variable does not have a constant initializer
constinit thread_local std::mt19937 engine(std::random_device{}()); //ng、定数式で初期化できない
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
prog.cc:37:3: note: required by 'constinit' specifier here
constinit thread_local std::mt19937 engine(std::random_device{}()); //ng、定数式で初期化できない
^~~~~~~~~
prog.cc:37:39: note: non-constexpr constructor 'mersenne_twister_engine' cannot be used in a constant expression
constinit thread_local std::mt19937 engine(std::random_device{}()); //ng、定数式で初期化できない
^
/opt/wandbox/clang-head/include/c++/v1/random:2110:14: note: declared here
explicit mersenne_twister_engine(result_type __sd = default_seed)
^
prog.cc:39:3: error: local variable cannot be declared 'constinit'
constinit int local = 0; //ng、ローカル変数
^
2 warnings and 7 errors generated.
Exit Code:
1