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c++ source #1
Output
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Intel asm syntax
Demangle identifiers
Verbose demangling
Filters
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Debug intrinsics
Compiler
6502-c++ 11.1.0
ARM GCC 10.2.0
ARM GCC 10.3.0
ARM GCC 10.4.0
ARM GCC 10.5.0
ARM GCC 11.1.0
ARM GCC 11.2.0
ARM GCC 11.3.0
ARM GCC 11.4.0
ARM GCC 12.1.0
ARM GCC 12.2.0
ARM GCC 12.3.0
ARM GCC 12.4.0
ARM GCC 13.1.0
ARM GCC 13.2.0
ARM GCC 13.2.0 (unknown-eabi)
ARM GCC 13.3.0
ARM GCC 13.3.0 (unknown-eabi)
ARM GCC 14.1.0
ARM GCC 14.1.0 (unknown-eabi)
ARM GCC 14.2.0
ARM GCC 14.2.0 (unknown-eabi)
ARM GCC 4.5.4
ARM GCC 4.6.4
ARM GCC 5.4
ARM GCC 6.3.0
ARM GCC 6.4.0
ARM GCC 7.3.0
ARM GCC 7.5.0
ARM GCC 8.2.0
ARM GCC 8.5.0
ARM GCC 9.3.0
ARM GCC 9.4.0
ARM GCC 9.5.0
ARM GCC trunk
ARM gcc 10.2.1 (none)
ARM gcc 10.3.1 (2021.07 none)
ARM gcc 10.3.1 (2021.10 none)
ARM gcc 11.2.1 (none)
ARM gcc 5.4.1 (none)
ARM gcc 7.2.1 (none)
ARM gcc 8.2 (WinCE)
ARM gcc 8.3.1 (none)
ARM gcc 9.2.1 (none)
ARM msvc v19.0 (WINE)
ARM msvc v19.10 (WINE)
ARM msvc v19.14 (WINE)
ARM64 Morello gcc 10.1 Alpha 2
ARM64 gcc 10.2
ARM64 gcc 10.3
ARM64 gcc 10.4
ARM64 gcc 10.5.0
ARM64 gcc 11.1
ARM64 gcc 11.2
ARM64 gcc 11.3
ARM64 gcc 11.4.0
ARM64 gcc 12.1
ARM64 gcc 12.2.0
ARM64 gcc 12.3.0
ARM64 gcc 12.4.0
ARM64 gcc 13.1.0
ARM64 gcc 13.2.0
ARM64 gcc 13.3.0
ARM64 gcc 14.1.0
ARM64 gcc 14.2.0
ARM64 gcc 4.9.4
ARM64 gcc 5.4
ARM64 gcc 5.5.0
ARM64 gcc 6.3
ARM64 gcc 6.4
ARM64 gcc 7.3
ARM64 gcc 7.5
ARM64 gcc 8.2
ARM64 gcc 8.5
ARM64 gcc 9.3
ARM64 gcc 9.4
ARM64 gcc 9.5
ARM64 gcc trunk
ARM64 msvc v19.14 (WINE)
AVR gcc 10.3.0
AVR gcc 11.1.0
AVR gcc 12.1.0
AVR gcc 12.2.0
AVR gcc 12.3.0
AVR gcc 12.4.0
AVR gcc 13.1.0
AVR gcc 13.2.0
AVR gcc 13.3.0
AVR gcc 14.1.0
AVR gcc 14.2.0
AVR gcc 4.5.4
AVR gcc 4.6.4
AVR gcc 5.4.0
AVR gcc 9.2.0
AVR gcc 9.3.0
Arduino Mega (1.8.9)
Arduino Uno (1.8.9)
BPF clang (trunk)
BPF clang 13.0.0
BPF clang 14.0.0
BPF clang 15.0.0
BPF clang 16.0.0
BPF clang 17.0.1
BPF clang 18.1.0
BPF clang 19.1.0
BPF gcc 13.1.0
BPF gcc 13.2.0
BPF gcc 13.3.0
BPF gcc trunk
EDG (experimental reflection)
EDG 6.5
EDG 6.5 (GNU mode gcc 13)
EDG 6.6
EDG 6.6 (GNU mode gcc 13)
FRC 2019
FRC 2020
FRC 2023
HPPA gcc 14.2.0
KVX ACB 4.1.0 (GCC 7.5.0)
KVX ACB 4.1.0-cd1 (GCC 7.5.0)
KVX ACB 4.10.0 (GCC 10.3.1)
KVX ACB 4.11.1 (GCC 10.3.1)
KVX ACB 4.12.0 (GCC 11.3.0)
KVX ACB 4.2.0 (GCC 7.5.0)
KVX ACB 4.3.0 (GCC 7.5.0)
KVX ACB 4.4.0 (GCC 7.5.0)
KVX ACB 4.6.0 (GCC 9.4.1)
KVX ACB 4.8.0 (GCC 9.4.1)
KVX ACB 4.9.0 (GCC 9.4.1)
KVX ACB 5.0.0 (GCC 12.2.1)
LoongArch64 clang (trunk)
LoongArch64 clang 17.0.1
LoongArch64 clang 18.1.0
LoongArch64 clang 19.1.0
M68K gcc 13.1.0
M68K gcc 13.2.0
M68K gcc 13.3.0
M68K gcc 14.1.0
M68K gcc 14.2.0
M68k clang (trunk)
MRISC32 gcc (trunk)
MSP430 gcc 4.5.3
MSP430 gcc 5.3.0
MSP430 gcc 6.2.1
MinGW clang 14.0.3
MinGW clang 14.0.6
MinGW clang 15.0.7
MinGW clang 16.0.0
MinGW clang 16.0.2
MinGW gcc 11.3.0
MinGW gcc 12.1.0
MinGW gcc 12.2.0
MinGW gcc 13.1.0
RISC-V (32-bits) gcc (trunk)
RISC-V (32-bits) gcc 10.2.0
RISC-V (32-bits) gcc 10.3.0
RISC-V (32-bits) gcc 11.2.0
RISC-V (32-bits) gcc 11.3.0
RISC-V (32-bits) gcc 11.4.0
RISC-V (32-bits) gcc 12.1.0
RISC-V (32-bits) gcc 12.2.0
RISC-V (32-bits) gcc 12.3.0
RISC-V (32-bits) gcc 12.4.0
RISC-V (32-bits) gcc 13.1.0
RISC-V (32-bits) gcc 13.2.0
RISC-V (32-bits) gcc 13.3.0
RISC-V (32-bits) gcc 14.1.0
RISC-V (32-bits) gcc 14.2.0
RISC-V (32-bits) gcc 8.2.0
RISC-V (32-bits) gcc 8.5.0
RISC-V (32-bits) gcc 9.4.0
RISC-V (64-bits) gcc (trunk)
RISC-V (64-bits) gcc 10.2.0
RISC-V (64-bits) gcc 10.3.0
RISC-V (64-bits) gcc 11.2.0
RISC-V (64-bits) gcc 11.3.0
RISC-V (64-bits) gcc 11.4.0
RISC-V (64-bits) gcc 12.1.0
RISC-V (64-bits) gcc 12.2.0
RISC-V (64-bits) gcc 12.3.0
RISC-V (64-bits) gcc 12.4.0
RISC-V (64-bits) gcc 13.1.0
RISC-V (64-bits) gcc 13.2.0
RISC-V (64-bits) gcc 13.3.0
RISC-V (64-bits) gcc 14.1.0
RISC-V (64-bits) gcc 14.2.0
RISC-V (64-bits) gcc 8.2.0
RISC-V (64-bits) gcc 8.5.0
RISC-V (64-bits) gcc 9.4.0
RISC-V rv32gc clang (trunk)
RISC-V rv32gc clang 10.0.0
RISC-V rv32gc clang 10.0.1
RISC-V rv32gc clang 11.0.0
RISC-V rv32gc clang 11.0.1
RISC-V rv32gc clang 12.0.0
RISC-V rv32gc clang 12.0.1
RISC-V rv32gc clang 13.0.0
RISC-V rv32gc clang 13.0.1
RISC-V rv32gc clang 14.0.0
RISC-V rv32gc clang 15.0.0
RISC-V rv32gc clang 16.0.0
RISC-V rv32gc clang 17.0.1
RISC-V rv32gc clang 18.1.0
RISC-V rv32gc clang 19.1.0
RISC-V rv32gc clang 9.0.0
RISC-V rv32gc clang 9.0.1
RISC-V rv64gc clang (trunk)
RISC-V rv64gc clang 10.0.0
RISC-V rv64gc clang 10.0.1
RISC-V rv64gc clang 11.0.0
RISC-V rv64gc clang 11.0.1
RISC-V rv64gc clang 12.0.0
RISC-V rv64gc clang 12.0.1
RISC-V rv64gc clang 13.0.0
RISC-V rv64gc clang 13.0.1
RISC-V rv64gc clang 14.0.0
RISC-V rv64gc clang 15.0.0
RISC-V rv64gc clang 16.0.0
RISC-V rv64gc clang 17.0.1
RISC-V rv64gc clang 18.1.0
RISC-V rv64gc clang 19.1.0
RISC-V rv64gc clang 9.0.0
RISC-V rv64gc clang 9.0.1
Raspbian Buster
Raspbian Stretch
SPARC LEON gcc 12.2.0
SPARC LEON gcc 12.3.0
SPARC LEON gcc 12.4.0
SPARC LEON gcc 13.1.0
SPARC LEON gcc 13.2.0
SPARC LEON gcc 13.3.0
SPARC LEON gcc 14.1.0
SPARC LEON gcc 14.2.0
SPARC gcc 12.2.0
SPARC gcc 12.3.0
SPARC gcc 12.4.0
SPARC gcc 13.1.0
SPARC gcc 13.2.0
SPARC gcc 13.3.0
SPARC gcc 14.1.0
SPARC gcc 14.2.0
SPARC64 gcc 12.2.0
SPARC64 gcc 12.3.0
SPARC64 gcc 12.4.0
SPARC64 gcc 13.1.0
SPARC64 gcc 13.2.0
SPARC64 gcc 13.3.0
SPARC64 gcc 14.1.0
SPARC64 gcc 14.2.0
TI C6x gcc 12.2.0
TI C6x gcc 12.3.0
TI C6x gcc 12.4.0
TI C6x gcc 13.1.0
TI C6x gcc 13.2.0
TI C6x gcc 13.3.0
TI C6x gcc 14.1.0
TI C6x gcc 14.2.0
TI CL430 21.6.1
VAX gcc NetBSDELF 10.4.0
VAX gcc NetBSDELF 10.5.0 (Nov 15 03:50:22 2023)
WebAssembly clang (trunk)
Xtensa ESP32 gcc 11.2.0 (2022r1)
Xtensa ESP32 gcc 12.2.0 (20230208)
Xtensa ESP32 gcc 8.2.0 (2019r2)
Xtensa ESP32 gcc 8.2.0 (2020r1)
Xtensa ESP32 gcc 8.2.0 (2020r2)
Xtensa ESP32 gcc 8.4.0 (2020r3)
Xtensa ESP32 gcc 8.4.0 (2021r1)
Xtensa ESP32 gcc 8.4.0 (2021r2)
Xtensa ESP32-S2 gcc 11.2.0 (2022r1)
Xtensa ESP32-S2 gcc 12.2.0 (20230208)
Xtensa ESP32-S2 gcc 8.2.0 (2019r2)
Xtensa ESP32-S2 gcc 8.2.0 (2020r1)
Xtensa ESP32-S2 gcc 8.2.0 (2020r2)
Xtensa ESP32-S2 gcc 8.4.0 (2020r3)
Xtensa ESP32-S2 gcc 8.4.0 (2021r1)
Xtensa ESP32-S2 gcc 8.4.0 (2021r2)
Xtensa ESP32-S3 gcc 11.2.0 (2022r1)
Xtensa ESP32-S3 gcc 12.2.0 (20230208)
Xtensa ESP32-S3 gcc 8.4.0 (2020r3)
Xtensa ESP32-S3 gcc 8.4.0 (2021r1)
Xtensa ESP32-S3 gcc 8.4.0 (2021r2)
arm64 msvc v19.20 VS16.0
arm64 msvc v19.21 VS16.1
arm64 msvc v19.22 VS16.2
arm64 msvc v19.23 VS16.3
arm64 msvc v19.24 VS16.4
arm64 msvc v19.25 VS16.5
arm64 msvc v19.27 VS16.7
arm64 msvc v19.28 VS16.8
arm64 msvc v19.28 VS16.9
arm64 msvc v19.29 VS16.10
arm64 msvc v19.29 VS16.11
arm64 msvc v19.30 VS17.0
arm64 msvc v19.31 VS17.1
arm64 msvc v19.32 VS17.2
arm64 msvc v19.33 VS17.3
arm64 msvc v19.34 VS17.4
arm64 msvc v19.35 VS17.5
arm64 msvc v19.36 VS17.6
arm64 msvc v19.37 VS17.7
arm64 msvc v19.38 VS17.8
arm64 msvc v19.39 VS17.9
arm64 msvc v19.40 VS17.10
arm64 msvc v19.latest
armv7-a clang (trunk)
armv7-a clang 10.0.0
armv7-a clang 10.0.1
armv7-a clang 11.0.0
armv7-a clang 11.0.1
armv7-a clang 12.0.0
armv7-a clang 12.0.1
armv7-a clang 13.0.0
armv7-a clang 13.0.1
armv7-a clang 14.0.0
armv7-a clang 15.0.0
armv7-a clang 16.0.0
armv7-a clang 17.0.1
armv7-a clang 18.1.0
armv7-a clang 19.1.0
armv7-a clang 9.0.0
armv7-a clang 9.0.1
armv8-a clang (all architectural features, trunk)
armv8-a clang (trunk)
armv8-a clang 10.0.0
armv8-a clang 10.0.1
armv8-a clang 11.0.0
armv8-a clang 11.0.1
armv8-a clang 12.0.0
armv8-a clang 13.0.0
armv8-a clang 14.0.0
armv8-a clang 15.0.0
armv8-a clang 16.0.0
armv8-a clang 17.0.1
armv8-a clang 18.1.0
armv8-a clang 19.1.0
armv8-a clang 9.0.0
armv8-a clang 9.0.1
clang-cl 18.1.0
ellcc 0.1.33
ellcc 0.1.34
ellcc 2017-07-16
hexagon-clang 16.0.5
llvm-mos atari2600-3e
llvm-mos atari2600-4k
llvm-mos atari2600-common
llvm-mos atari5200-supercart
llvm-mos atari8-cart-megacart
llvm-mos atari8-cart-std
llvm-mos atari8-cart-xegs
llvm-mos atari8-common
llvm-mos atari8-dos
llvm-mos c128
llvm-mos c64
llvm-mos commodore
llvm-mos cpm65
llvm-mos cx16
llvm-mos dodo
llvm-mos eater
llvm-mos mega65
llvm-mos nes
llvm-mos nes-action53
llvm-mos nes-cnrom
llvm-mos nes-gtrom
llvm-mos nes-mmc1
llvm-mos nes-mmc3
llvm-mos nes-nrom
llvm-mos nes-unrom
llvm-mos nes-unrom-512
llvm-mos osi-c1p
llvm-mos pce
llvm-mos pce-cd
llvm-mos pce-common
llvm-mos pet
llvm-mos rp6502
llvm-mos rpc8e
llvm-mos supervision
llvm-mos vic20
loongarch64 gcc 12.2.0
loongarch64 gcc 12.3.0
loongarch64 gcc 12.4.0
loongarch64 gcc 13.1.0
loongarch64 gcc 13.2.0
loongarch64 gcc 13.3.0
loongarch64 gcc 14.1.0
loongarch64 gcc 14.2.0
mips clang 13.0.0
mips clang 14.0.0
mips clang 15.0.0
mips clang 16.0.0
mips clang 17.0.1
mips clang 18.1.0
mips clang 19.1.0
mips gcc 11.2.0
mips gcc 12.1.0
mips gcc 12.2.0
mips gcc 12.3.0
mips gcc 12.4.0
mips gcc 13.1.0
mips gcc 13.2.0
mips gcc 13.3.0
mips gcc 14.1.0
mips gcc 14.2.0
mips gcc 4.9.4
mips gcc 5.4
mips gcc 5.5.0
mips gcc 9.3.0 (codescape)
mips gcc 9.5.0
mips64 (el) gcc 12.1.0
mips64 (el) gcc 12.2.0
mips64 (el) gcc 12.3.0
mips64 (el) gcc 12.4.0
mips64 (el) gcc 13.1.0
mips64 (el) gcc 13.2.0
mips64 (el) gcc 13.3.0
mips64 (el) gcc 14.1.0
mips64 (el) gcc 14.2.0
mips64 (el) gcc 4.9.4
mips64 (el) gcc 5.4.0
mips64 (el) gcc 5.5.0
mips64 (el) gcc 9.5.0
mips64 clang 13.0.0
mips64 clang 14.0.0
mips64 clang 15.0.0
mips64 clang 16.0.0
mips64 clang 17.0.1
mips64 clang 18.1.0
mips64 clang 19.1.0
mips64 gcc 11.2.0
mips64 gcc 12.1.0
mips64 gcc 12.2.0
mips64 gcc 12.3.0
mips64 gcc 12.4.0
mips64 gcc 13.1.0
mips64 gcc 13.2.0
mips64 gcc 13.3.0
mips64 gcc 14.1.0
mips64 gcc 14.2.0
mips64 gcc 4.9.4
mips64 gcc 5.4.0
mips64 gcc 5.5.0
mips64 gcc 9.5.0
mips64el clang 13.0.0
mips64el clang 14.0.0
mips64el clang 15.0.0
mips64el clang 16.0.0
mips64el clang 17.0.1
mips64el clang 18.1.0
mips64el clang 19.1.0
mipsel clang 13.0.0
mipsel clang 14.0.0
mipsel clang 15.0.0
mipsel clang 16.0.0
mipsel clang 17.0.1
mipsel clang 18.1.0
mipsel clang 19.1.0
mipsel gcc 12.1.0
mipsel gcc 12.2.0
mipsel gcc 12.3.0
mipsel gcc 12.4.0
mipsel gcc 13.1.0
mipsel gcc 13.2.0
mipsel gcc 13.3.0
mipsel gcc 14.1.0
mipsel gcc 14.2.0
mipsel gcc 4.9.4
mipsel gcc 5.4.0
mipsel gcc 5.5.0
mipsel gcc 9.5.0
nanoMIPS gcc 6.3.0 (mtk)
power gcc 11.2.0
power gcc 12.1.0
power gcc 12.2.0
power gcc 12.3.0
power gcc 12.4.0
power gcc 13.1.0
power gcc 13.2.0
power gcc 13.3.0
power gcc 14.1.0
power gcc 14.2.0
power gcc 4.8.5
power64 AT12.0 (gcc8)
power64 AT13.0 (gcc9)
power64 gcc 11.2.0
power64 gcc 12.1.0
power64 gcc 12.2.0
power64 gcc 12.3.0
power64 gcc 12.4.0
power64 gcc 13.1.0
power64 gcc 13.2.0
power64 gcc 13.3.0
power64 gcc 14.1.0
power64 gcc 14.2.0
power64 gcc trunk
power64le AT12.0 (gcc8)
power64le AT13.0 (gcc9)
power64le clang (trunk)
power64le gcc 11.2.0
power64le gcc 12.1.0
power64le gcc 12.2.0
power64le gcc 12.3.0
power64le gcc 12.4.0
power64le gcc 13.1.0
power64le gcc 13.2.0
power64le gcc 13.3.0
power64le gcc 14.1.0
power64le gcc 14.2.0
power64le gcc 6.3.0
power64le gcc trunk
powerpc64 clang (trunk)
s390x gcc 11.2.0
s390x gcc 12.1.0
s390x gcc 12.2.0
s390x gcc 12.3.0
s390x gcc 12.4.0
s390x gcc 13.1.0
s390x gcc 13.2.0
s390x gcc 13.3.0
s390x gcc 14.1.0
s390x gcc 14.2.0
sh gcc 12.2.0
sh gcc 12.3.0
sh gcc 12.4.0
sh gcc 13.1.0
sh gcc 13.2.0
sh gcc 13.3.0
sh gcc 14.1.0
sh gcc 14.2.0
sh gcc 4.9.4
sh gcc 9.5.0
vast (trunk)
x64 msvc v19.0 (WINE)
x64 msvc v19.10 (WINE)
x64 msvc v19.14 (WINE)
x64 msvc v19.20 VS16.0
x64 msvc v19.21 VS16.1
x64 msvc v19.22 VS16.2
x64 msvc v19.23 VS16.3
x64 msvc v19.24 VS16.4
x64 msvc v19.25 VS16.5
x64 msvc v19.27 VS16.7
x64 msvc v19.28 VS16.8
x64 msvc v19.28 VS16.9
x64 msvc v19.29 VS16.10
x64 msvc v19.29 VS16.11
x64 msvc v19.30 VS17.0
x64 msvc v19.31 VS17.1
x64 msvc v19.32 VS17.2
x64 msvc v19.33 VS17.3
x64 msvc v19.34 VS17.4
x64 msvc v19.35 VS17.5
x64 msvc v19.36 VS17.6
x64 msvc v19.37 VS17.7
x64 msvc v19.38 VS17.8
x64 msvc v19.39 VS17.9
x64 msvc v19.40 VS17.10
x64 msvc v19.latest
x86 djgpp 4.9.4
x86 djgpp 5.5.0
x86 djgpp 6.4.0
x86 djgpp 7.2.0
x86 msvc v19.0 (WINE)
x86 msvc v19.10 (WINE)
x86 msvc v19.14 (WINE)
x86 msvc v19.20 VS16.0
x86 msvc v19.21 VS16.1
x86 msvc v19.22 VS16.2
x86 msvc v19.23 VS16.3
x86 msvc v19.24 VS16.4
x86 msvc v19.25 VS16.5
x86 msvc v19.27 VS16.7
x86 msvc v19.28 VS16.8
x86 msvc v19.28 VS16.9
x86 msvc v19.29 VS16.10
x86 msvc v19.29 VS16.11
x86 msvc v19.30 VS17.0
x86 msvc v19.31 VS17.1
x86 msvc v19.32 VS17.2
x86 msvc v19.33 VS17.3
x86 msvc v19.34 VS17.4
x86 msvc v19.35 VS17.5
x86 msvc v19.36 VS17.6
x86 msvc v19.37 VS17.7
x86 msvc v19.38 VS17.8
x86 msvc v19.39 VS17.9
x86 msvc v19.40 VS17.10
x86 msvc v19.latest
x86 nvc++ 22.11
x86 nvc++ 22.7
x86 nvc++ 22.9
x86 nvc++ 23.1
x86 nvc++ 23.11
x86 nvc++ 23.3
x86 nvc++ 23.5
x86 nvc++ 23.7
x86 nvc++ 23.9
x86 nvc++ 24.1
x86 nvc++ 24.3
x86 nvc++ 24.5
x86 nvc++ 24.7
x86 nvc++ 24.9
x86-64 Zapcc 190308
x86-64 clang (EricWF contracts)
x86-64 clang (amd-staging)
x86-64 clang (assertions trunk)
x86-64 clang (clangir)
x86-64 clang (dascandy contracts)
x86-64 clang (experimental -Wlifetime)
x86-64 clang (experimental P1061)
x86-64 clang (experimental P1144)
x86-64 clang (experimental P1221)
x86-64 clang (experimental P2996)
x86-64 clang (experimental P3068)
x86-64 clang (experimental P3309)
x86-64 clang (experimental P3367)
x86-64 clang (experimental P3372)
x86-64 clang (experimental metaprogramming - P2632)
x86-64 clang (old concepts branch)
x86-64 clang (p1974)
x86-64 clang (pattern matching - P2688)
x86-64 clang (reflection)
x86-64 clang (resugar)
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Source code
// // debug.hpp - prints everything! // // Source code available at: https://github.com/archibate/debug-hpp // // Usage: // debug(), "my variable is", your_variable; // // Results in: // your_file.cpp:233: my variable is {1, 2, 3} // // (suppose your_variable is an std::vector) // // **WARNING**: // debug() only works in `Debug` build! It is automatically disabled in `Release` build (we do this by checking whether the NDEBUG macro is defined). Yeah, completely no outputs in `Release` build, this is by design. // // This is a feature for convenience, e.g. you don't have to remove all the debug() sentences after debug done, simply switch to `Release` build and everything debug is gone, no runtime overhead! And when you need debug simply switch back to `Debug` build and everything debug() you written before is back in life. // // If you insist to use debug() even in `Release` build, please `#define DEBUG_LEVEL 1` before including this header file. // // // Assertion check is also supported: // debug().check(some_variable) > 0; // // Will trigger a 'trap' interrupt (__debugbreak for MSVC and __builtin_trap for GCC, configurable, see below) for the debugger to catch when `some_variable > 0` is false, as well as printing human readable error message: // your_file.cpp:233: assertion failed: 3 < 0 // // // After debugging complete, no need to busy removing all debug() calls! Simply: // #define NDEBUG // would supress all debug() prints and assertion checks, completely no runtime overhead. For CMake or Visual Studio users, simply switch to `Release` build would supress debug() prints. Since they automatically define `NDEBUG` for you in `Release`, `RelWithDebInfo` and `MinSizeRel` build types. // // // TL;DR: This is a useful debugging utility the C++ programmers had all dreamed of: // // 1. print using the neat comma syntax, easy-to-use // 2. supports printing STL objects including string, vector, tuple, optional, variant, unique_ptr, type_info, and so on. (C++20 required) // 3. just add a member method named `repr`, e.g. `std::string repr() const { ... }` to support printing your custom class! // 4. classes that are not supported to print will be shown in something like `[TypeName@0xdeadbeaf]` where 0xdeadbeaf is it's address. // 5. highly configurable, customize the behaviour by defining the DEBUG_xxx macros (see below) // 6. when debug done, supress all debug messages by simply `#define NDEBUG`, the whole library is disabled at compile-time, no runtime overhead // 7. Thread safe, every line of message is always distinct, no annoying interleaving output rushing into console (typical experience when using cout) // // // Here is a list of configurable macros, define them **before** including this header file to take effect: // // `#define DEBUG_LEVEL 0` (default when defined NDEBUG) - disable debug output, completely no runtime overhead // `#define DEBUG_LEVEL 1` (default when !defined NDEBUG) - enable debug output, prints everything you asked to print // // `#define DEBUG_SHOW_LOCATION 1` (default) - show source location mark before each line of the debug output (e.g. "file.cpp:233") // `#define DEBUG_SHOW_LOCATION 0` - do not show the location mark // // `#define DEBUG_OUTPUT std::cerr <<` (default) - controls where to output the debug strings (must be callable as DEBUG_OUTPUT(str)) // // `#define DEBUG_PANIC_METHOD 0` - throws an runtime error with debug string as message when assertion failed // `#define DEBUG_PANIC_METHOD 1` (default) - print the error message when assertion failed, then triggers a 'trap' interrupt, useful for debuggers to catch, if no debuggers attached, the program would terminate // `#define DEBUG_PANIC_METHOD 2` - print the error message when assertion failed, and then call std::terminate // `#define DEBUG_PANIC_METHOD 3` - print the error message when assertion failed, do not terminate, do not throw any exception // // `#define DEBUG_REPR_NAME repr` (default) - if an object x have a member function like `x.repr()` or a global function `repr` supporting `repr(x)`, then the value of `x.repr()` or `repr(x)` will be printed instead for this object // // `#define DEBUG_RANGE_BRACE "{}"` (default) - controls format for range-like objects (supporting begin(x) and end(x)) in "{1, 2, 3, ...}" // `#define DEBUG_RANGE_COMMA ", "` (default) - ditto // // `#define DEBUG_TUPLE_BRACE "{}"` (default) - controls format for tuple-like objects (supporting std::tuple_size<X>) in "{1, 2, 3}" // `#define DEBUG_TUPLE_COMMA ", "` (default) - ditto // // `#define DEBUG_MAGIC_ENUM magic_enum::enum_name` - enable printing enum in their name rather than value, if you have magic_enum.hpp // // `#define DEBUG_UNSIGNED_AS_HEXADECIMAL 0` (default) - print unsigned integers as decimal // `#define DEBUG_UNSIGNED_AS_HEXADECIMAL 1` - print unsigned integers as hexadecimal // `#define DEBUG_UNSIGNED_AS_HEXADECIMAL 2` - print unsigned integers as full-width hexadecimal // // `#define DEBUG_HEXADECIMAL_UPPERCASE 0` (default) - print hexadecimal values in lowercase (a-f) // `#define DEBUG_HEXADECIMAL_UPPERCASE 1` - print hexadecimal values in uppercase (A-F) // // `#define DEBUG_SUPRESS_NON_ASCII 0` (default) - consider non-ascii characters in std::string as printable (e.g. UTF-8 encoded Chinese characters) // `#define DEBUG_SUPRESS_NON_ASCII 1` - consider non-ascii characters in std::string as not printable (print them in e.g. '\xfe' instead) // // `#define DEBUG_SHOW_SOURCE_CODE_LINE 1` - enable debug output with detailed source code level information (requires readable source file path) // // `#define DEBUG_NULLOPT_STRING "nullopt"` (default) - controls how to print optional-like objects (supporting *x and (bool)x) when it is nullopt // // `#define DEBUG_NULLPTR_STRING "nullptr"` (default) - controls how to print pointer-like objects (supporting static_cast<void const volatile *>(x.get())) when it is nullptr // // `#define DEBUG_SMART_POINTER_MODE 1` (default) - print smart pointer as raw pointer address (e.g. 0xdeadbeaf) // `#define DEBUG_SMART_POINTER_MODE 2` - print smart pointer as content value unless nullptr (e.g. 42 for std::shared_ptr<int>) // `#define DEBUG_SMART_POINTER_MODE 3` - print smart pointer as both content value and raw pointer address (e.g. 42@0xdeadbeaf) // // `#define DEBUG_NAMESPACE_BEGIN` (default) - expose debug in the global namespace // `#define DEBUG_NAMESPACE_END` (default) - ditto // // `#define DEBUG_NAMESPACE_BEGIN namespace mydebugger {` (default) - expose debug in the the namespace `mydebugger`, and use it like `mydebugger::debug()` // `#define DEBUG_NAMESPACE_END }` (default) - ditto // // `#define DEBUG_CLASS_NAME debug` (default) - the default name for the debug class is `debug()`, you may define your custom name here // #ifndef DEBUG_LEVEL # ifdef NDEBUG # define DEBUG_LEVEL 0 # else # define DEBUG_LEVEL 1 # endif #endif #ifndef DEBUG_SHOW_LOCATION # define DEBUG_SHOW_LOCATION 1 #endif #ifndef DEBUG_REPR_NAME # define DEBUG_REPR_NAME repr #endif #ifndef DEBUG_NAMESPACE_BEGIN # define DEBUG_NAMESPACE_BEGIN #endif #ifndef DEBUG_NAMESPACE_END # define DEBUG_NAMESPACE_END #endif #ifndef DEBUG_OUTPUT # define DEBUG_OUTPUT std::cerr << #endif #ifndef DEBUG_ENABLE_FILES_MATCH # define DEBUG_ENABLE_FILES_MATCH 0 #endif #ifndef DEBUG_PANIC_METHOD # define DEBUG_PANIC_METHOD 1 #endif #ifndef DEBUG_SUPRESS_NON_ASCII # define DEBUG_SUPRESS_NON_ASCII 0 #endif #ifndef DEBUG_SEPARATOR_FILE # define DEBUG_SEPARATOR_FILE ':' #endif #ifndef DEBUG_SEPARATOR_LINE # define DEBUG_SEPARATOR_LINE ':' #endif #ifndef DEBUG_SEPARATOR_TAB # define DEBUG_SEPARATOR_TAB '\t' #endif #ifndef DEBUG_SOURCE_LINE_BRACE # define DEBUG_SOURCE_LINE_BRACE "[]" #endif #ifndef DEBUG_RANGE_BRACE # define DEBUG_RANGE_BRACE "{}" #endif #ifndef DEBUG_RANGE_COMMA # define DEBUG_RANGE_COMMA ", " #endif #ifndef DEBUG_TUPLE_BRACE # define DEBUG_TUPLE_BRACE "{}" #endif #ifndef DEBUG_TUPLE_COMMA # define DEBUG_TUPLE_COMMA ", " #endif #ifndef DEBUG_ENUM_BRACE # define DEBUG_ENUM_BRACE "()" #endif #ifndef DEBUG_NULLOPT_STRING # define DEBUG_NULLOPT_STRING "nullopt" #endif #ifndef DEBUG_NULLPTR_STRING # define DEBUG_NULLPTR_STRING "nullptr" #endif #ifndef DEBUG_UNKNOWN_TYPE_BRACE # define DEBUG_UNKNOWN_TYPE_BRACE "[]" #endif #ifndef DEBUG_UNKNOWN_TYPE_AT # define DEBUG_UNKNOWN_TYPE_AT '@' #endif #ifndef DEBUG_SMART_POINTER_MODE # define DEBUG_SMART_POINTER_MODE 1 #endif #ifndef DEBUG_SMART_POINTER_AT # define DEBUG_SMART_POINTER_AT '@' #endif #ifndef DEBUG_POINTER_HEXADECIMAL_PREFIX # define DEBUG_POINTER_HEXADECIMAL_PREFIX "0x" #endif #ifndef DEBUG_UNSIGNED_AS_HEXADECIMAL # define DEBUG_UNSIGNED_AS_HEXADECIMAL 0 #endif #ifndef DEBUG_HEXADECIMAL_UPPERCASE # define DEBUG_HEXADECIMAL_UPPERCASE 0 #endif #ifdef DEBUG_CLASS_NAME # define debug DEBUG_CLASS_NAME #endif #if DEBUG_LEVEL # include <limits> # include <cstdint> # include <cstdlib> # include <iomanip> # include <iostream> # if DEBUG_SHOW_SOURCE_CODE_LINE # include <fstream> # include <unordered_map> # endif # ifndef DEBUG_SOURCE_LOCATION # if __cplusplus >= 202002L # if defined(__has_include) # if __has_include(<source_location>) # include <source_location> # if __cpp_lib_source_location # define DEBUG_SOURCE_LOCATION std::source_location # endif # endif # endif # endif # endif # ifndef DEBUG_SOURCE_LOCATION # if __cplusplus >= 201505L # if defined(__has_include) # if __has_include(<experimental/source_location>) # include <experimental/source_location> # if __cpp_lib_experimental_source_location # define DEBUG_SOURCE_LOCATION std::experimental::source_location # endif # endif # endif # endif # endif # include <type_traits> # include <utility> # include <typeinfo> # include <sstream> # include <string> # include <memory> # ifndef DEBUG_CUSTOM_DEMANGLE # ifndef DEBUG_HAS_CXXABI_H # if defined(__has_include) # if defined(__unix__) && __has_include(<cxxabi.h>) # include <cxxabi.h> # define DEBUG_HAS_CXXABI_H # endif # endif # else # include <cxxabi.h> # endif # endif # ifndef DEBUG_STRING_VIEW # if defined(__has_include) # if __cplusplus >= 201703L # if __has_include(<string_view>) # include <string_view> # if __cpp_lib_string_view # define DEBUG_STRING_VIEW std::string_view # endif # endif # endif # endif # endif # ifndef DEBUG_STRING_VIEW # include <string> # define DEBUG_STRING_VIEW std::string # endif # if __cplusplus >= 202002L # if defined(__has_cpp_attribute) # if __has_cpp_attribute(unlikely) # define DEBUG_UNLIKELY [[unlikely]] # else # define DEBUG_UNLIKELY # endif # if __has_cpp_attribute(likely) # define DEBUG_LIKELY [[likely]] # else # define DEBUG_LIKELY # endif # if __has_cpp_attribute(nodiscard) # define DEBUG_NODISCARD [[nodiscard]] # else # define DEBUG_NODISCARD # endif # else # define DEBUG_LIKELY # define DEBUG_UNLIKELY # define DEBUG_NODISCARD # endif # else # define DEBUG_LIKELY # define DEBUG_UNLIKELY # define DEBUG_NODISCARD # endif DEBUG_NAMESPACE_BEGIN struct DEBUG_NODISCARD debug { private: # ifndef DEBUG_SOURCE_LOCATION struct debug_source_location { char const *fn; int ln; int col; char const *fun; char const *file_name() const noexcept { return fn; } int line() const noexcept { return ln; } int column() const noexcept { return col; } char const *function_name() const noexcept { return fun; } static debug_source_location current() noexcept { return {"???", 0, 0, "?"}; } }; # ifndef DEBUG_SOURCE_LOCATION_FAKER # define DEBUG_SOURCE_LOCATION_FAKER \ { __FILE__, __LINE__, 0, __func__ } # endif # define DEBUG_SOURCE_LOCATION debug::debug_source_location # endif static void debug_quotes(std::ostream &oss, DEBUG_STRING_VIEW sv, char quote) { oss << quote; for (char c: sv) { switch (c) { case '\n': oss << "\\n"; break; case '\r': oss << "\\r"; break; case '\t': oss << "\\t"; break; case '\\': oss << "\\\\"; break; case '\0': oss << "\\0"; break; default: if ((c >= 0 && c < 0x20) || c == 0x7F # if DEBUG_SUPRESS_NON_ASCII || (static_cast<unsigned char>(c) >= 0x80) # endif ) { auto f = oss.flags(); oss << "\\x" << std::hex << std::setfill('0') << std::setw(2) << static_cast<int>(c) # if EBUG_HEXADECIMAL_UPPERCASE << std::uppercase # endif ; oss.flags(f); } else { if (c == quote) { oss << '\\'; } oss << c; } break; } } oss << quote; } # ifdef DEBUG_CUSTOM_DEMANGLE static std::string debug_demangle(char const *name) { return DEBUG_CUSTOM_DEMANGLE(name); } # else static std::string debug_demangle(char const *name) { # ifdef DEBUG_HAS_CXXABI_H int status; char *p = abi::__cxa_demangle(name, 0, 0, &status); std::string s = p ? p : name; std::free(p); # else std::string s = name; # endif return s; } # endif # if __cpp_if_constexpr && __cpp_concepts && \ __cpp_lib_type_trait_variable_templates template <class T> static void debug_format(std::ostream &oss, T const &t) { using std::begin; using std::end; if constexpr ((std::is_convertible<T, DEBUG_STRING_VIEW>::value || std::is_convertible<T, std::string>::value) && !std::is_same<T, char const *>::value) { if constexpr (!std::is_convertible<T, DEBUG_STRING_VIEW>::value) { std::string s = t; debug_quotes(oss, s, '"'); } else { debug_quotes(oss, t, '"'); } } else if constexpr (std::is_same<T, bool>::value) { auto f = oss.flags(); oss << std::boolalpha << t; oss.flags(f); } else if constexpr (std::is_same<T, char>::value || std::is_same<T, signed char>::value) { debug_quotes(oss, {reinterpret_cast<char const *>(&t), 1}, '\''); } else if constexpr ( # if __cpp_char8_t std::is_same<T, char8_t>::value || # endif std::is_same<T, char16_t>::value || std::is_same<T, char32_t>::value || std::is_same<T, wchar_t>::value) { auto f = oss.flags(); oss << "'\\" << " xu U"[sizeof(T)] << std::hex << std::setfill('0') << std::setw(sizeof(T) * 2) # if DEBUG_HEXADECIMAL_UPPERCASE << std::uppercase # endif << static_cast<std::uint32_t>(t) << "'"; oss.flags(f); # if DEBUG_UNSIGNED_AS_HEXADECIMAL } else if constexpr (std::is_integral<T>::value) { if constexpr (std::is_unsigned<T>::value) { auto f = oss.flags(); oss << "0x" << std::hex << std::setfill('0') # if DEBUG_UNSIGNED_AS_HEXADECIMAL >= 2 << std::setw(sizeof(T) * 2) # endif # if DEBUG_HEXADECIMAL_UPPERCASE << std::uppercase # endif ; if constexpr (sizeof(T) == 1) { oss << static_cast<unsigned int>(t); } else { oss << t; } oss.flags(f); } else { oss << static_cast<std::uint64_t>( static_cast<typename std::make_unsigned<T>::type>(t)); } # else } else if constexpr (std::is_integral<T>::value) { oss << static_cast<std::uint64_t>( static_cast<typename std::make_unsigned<T>::type>(t)); # endif } else if constexpr (std::is_floating_point<T>::value) { auto f = oss.flags(); oss << std::fixed << std::setprecision(std::numeric_limits<T>::digits10) << t; oss.flags(f); } else if constexpr (requires(T const &t) { static_cast<void const volatile *>(t.get()); }) { auto const *p = t.get(); if (p != nullptr) { # if DEBUG_SMART_POINTER_MODE == 1 debug_format(oss, *p); # elif DEBUG_SMART_POINTER_MODE == 2 auto f = oss.flags(); oss << DEBUG_POINTER_HEXADECIMAL_PREFIX << std::hex << std::setfill('0') # if DEBUG_HEXADECIMAL_UPPERCASE << std::uppercase # endif ; oss << reinterpret_cast<std::uintptr_t>( static_cast<void const volatile *>(p)); oss.flags(f); # else debug_format(oss, *p); oss << DEBUG_SMART_POINTER_AT; auto f = oss.flags(); oss << DEBUG_POINTER_HEXADECIMAL_PREFIX << std::hex << std::setfill('0') # if DEBUG_HEXADECIMAL_UPPERCASE << std::uppercase # endif ; oss << reinterpret_cast<std::uintptr_t>( static_cast<void const volatile *>(p)); oss.flags(f); # endif } else { oss << DEBUG_NULLPTR_STRING; } } else if constexpr (requires(std::ostream &oss, T const &t) { oss << t; }) { oss << t; } else if constexpr (std::is_pointer<T>::value || std::is_same<T, std::nullptr_t>::value) { if (t == nullptr) { auto f = oss.flags(); oss << DEBUG_POINTER_HEXADECIMAL_PREFIX << std::hex << std::setfill('0') # if DEBUG_HEXADECIMAL_UPPERCASE << std::uppercase # endif ; oss << reinterpret_cast<std::uintptr_t>( reinterpret_cast<void const volatile *>(t)); oss.flags(f); } else { oss << DEBUG_NULLPTR_STRING; } } else if constexpr (requires(T const &t) { begin(t) != end(t); }) { oss << DEBUG_RANGE_BRACE[0]; bool add_comma = false; for (auto &&i: t) { if (add_comma) { oss << DEBUG_RANGE_COMMA; } add_comma = true; debug_format(oss, std::forward<decltype(i)>(i)); } oss << DEBUG_RANGE_BRACE[1]; } else if constexpr (requires(T const &t) { std::tuple_size<T>::value; }) { oss << DEBUG_TUPLE_BRACE[0]; bool add_comma = false; std::apply( [&](auto &&...args) { (([&] { if (add_comma) { oss << DEBUG_TUPLE_COMMA; } add_comma = true; debug_format(oss, std::forward<decltype(args)>(args)); }()), ...); }, t); oss << DEBUG_TUPLE_BRACE[1]; } else if constexpr (std::is_enum<T>::value) { # ifdef DEBUG_MAGIC_ENUM oss << DEBUG_MAGIC_ENUM(t); # else oss << debug_demangle(typeid(T).name()) << DEBUG_ENUM_BRACE[0]; oss << static_cast<typename std::underlying_type<T>::type>(t); oss << DEBUG_ENUM_BRACE[1]; # endif } else if constexpr (std::is_same<T, std::type_info>::value) { oss << debug_demangle(t.name()); } else if constexpr (requires(T const &t) { t.DEBUG_REPR_NAME(); }) { debug_format(oss, t.DEBUG_REPR_NAME()); } else if constexpr (requires(T const &t) { t.DEBUG_REPR_NAME(oss); }) { t.DEBUG_REPR_NAME(oss); } else if constexpr (requires(T const &t) { DEBUG_REPR_NAME(t); }) { debug_format(oss, DEBUG_REPR_NAME(t)); } else if constexpr (requires(T const &t) { DEBUG_REPR_NAME(oss, t); }) { DEBUG_REPR_NAME(oss, t); } else if constexpr (requires(bool &b, T const &t) { b = holds_alternative(t); }) { visit([&oss](auto const &t) { debug_format(oss, t); }, t); } else if constexpr (requires(T const &t) { (void)(*t); (void)(bool)t; }) { if ((bool)t) { debug_format(oss, *t); } else { oss << DEBUG_NULLOPT_STRING; } } else { oss << DEBUG_UNKNOWN_TYPE_BRACE[0] << debug_demangle(typeid(t).name()) << DEBUG_UNKNOWN_TYPE_AT; debug_format(oss, reinterpret_cast<void const *>(std::addressof(t))); oss << DEBUG_UNKNOWN_TYPE_BRACE[1]; } } # else template <class T> struct debug_void { using type = void; }; template <bool v> struct debug_bool_constant { enum { value = v }; }; # define DEBUG_COND(n, ...) \ template <class T, class = void> \ struct debug_cond_##n : std::false_type {}; \ template <class T> \ struct debug_cond_##n<T, \ typename debug_void<decltype(__VA_ARGS__)>::type> \ : std::true_type {}; DEBUG_COND(is_ostream_ok, std::declval<std::ostream &>() << std::declval<T const &>()); DEBUG_COND(is_range, begin(std::declval<T const &>()) != end(std::declval<T const &>())); DEBUG_COND(is_tuple, std::tuple_size<T>::value); DEBUG_COND(is_member_repr, std::declval<T const &>().DEBUG_REPR_NAME()); DEBUG_COND(is_member_repr_stream, std::declval<T const &>().DEBUG_REPR_NAME( std::declval<std::ostream &>())); DEBUG_COND(is_adl_repr, DEBUG_REPR_NAME(std::declval<T const &>())); DEBUG_COND(is_adl_repr_stream, DEBUG_REPR_NAME(std::declval<std::ostream &>(), std::declval<T const &>())); struct variant_test_lambda { std::ostream &oss; template <class T> void operator()(T const &) const {} }; DEBUG_COND(is_variant, std::declval<bool &>() = holds_alternative(std::declval<T const &>())); DEBUG_COND(is_smart_pointer, static_cast<void const volatile *>( std::declval<T const &>().get())); DEBUG_COND(is_optional, (((void)*std::declval<T const &>(), (void)0), ((void)(bool)std::declval<T const &>(), (void)0))); # define DEBUG_CON(n, ...) \ template <class T> \ struct debug_cond_##n : debug_bool_constant<__VA_ARGS__> {}; DEBUG_CON(string, std::is_convertible<T, DEBUG_STRING_VIEW>::value || std::is_convertible<T, std::string>::value && !std::is_same<T, char const *>::value); DEBUG_CON(bool, std::is_same<T, bool>::value); DEBUG_CON(char, std::is_same<T, char>::value || std::is_same<T, signed char>::value); # if __cpp_char8_t DEBUG_CON(unicode_char, std::is_same<T, char8_t>::value || std::is_same<T, char16_t>::value || std::is_same<T, char32_t>::value || std::is_same<T, wchar_t>::value); # else DEBUG_CON(unicode_char, std::is_same<T, char16_t>::value || std::is_same<T, char32_t>::value || std::is_same<T, wchar_t>::value); # endif # if DEBUG_UNSIGNED_AS_HEXADECIMAL DEBUG_CON(integral_unsigned, std::is_integral<T>::value &&std::is_unsigned<T>::value); # else DEBUG_CON(integral_unsigned, false); # endif DEBUG_CON(integral, std::is_integral<T>::value); DEBUG_CON(floating_point, std::is_floating_point<T>::value); DEBUG_CON(pointer, std::is_pointer<T>::value || std::is_same<T, std::nullptr_t>::value); DEBUG_CON(enum, std::is_enum<T>::value); DEBUG_CON(type_info, std::is_same<T, std::type_info>::value); template <class T, class = void> struct debug_format_trait; template <class T> static void debug_format(std::ostream &oss, T const &t) { debug_format_trait<T>()(oss, t); } template <class T, class> struct debug_format_trait { void operator()(std::ostream &oss, T const &t) const { oss << DEBUG_UNKNOWN_TYPE_BRACE[0] << debug_demangle(typeid(t).name()) << DEBUG_UNKNOWN_TYPE_AT; debug_format(oss, reinterpret_cast<void const *>(std::addressof(t))); oss << DEBUG_UNKNOWN_TYPE_BRACE[1]; } }; template <class T> struct debug_format_trait< T, typename std::enable_if< debug_cond_string<T>::value && !std::is_convertible<T, DEBUG_STRING_VIEW>::value>::type> { void operator()(std::ostream &oss, T const &t) const { std::string s = t; debug_quotes(oss, s, '"'); } }; template <class T> struct debug_format_trait< T, typename std::enable_if< debug_cond_string<T>::value && std::is_convertible<T, DEBUG_STRING_VIEW>::value>::type> { void operator()(std::ostream &oss, T const &t) const { debug_quotes(oss, t, '"'); } }; template <class T> struct debug_format_trait< T, typename std::enable_if<!debug_cond_string<T>::value && debug_cond_bool<T>::value>::type> { void operator()(std::ostream &oss, T const &t) const { auto f = oss.flags(); oss << std::boolalpha << t; oss.flags(f); } }; template <class T> struct debug_format_trait< T, typename std::enable_if<!debug_cond_string<T>::value && !debug_cond_bool<T>::value && debug_cond_char<T>::value>::type> { void operator()(std::ostream &oss, T const &t) const { debug_quotes(oss, {reinterpret_cast<char const *>(&t), 1}, '\''); } }; template <class T> struct debug_format_trait< T, typename std::enable_if<!debug_cond_string<T>::value && !debug_cond_bool<T>::value && !debug_cond_char<T>::value && debug_cond_unicode_char<T>::value>::type> { void operator()(std::ostream &oss, T const &t) const { auto f = oss.flags(); oss << "'\\" << " xu U"[sizeof(T)] << std::hex << std::setfill('0') << std::setw(sizeof(T) * 2) # if DEBUG_HEXADECIMAL_UPPERCASE << std::uppercase # endif << static_cast<std::uint32_t>(t) << "'"; oss.flags(f); } }; template <class T> struct debug_format_trait< T, typename std::enable_if< !debug_cond_string<T>::value && !debug_cond_bool<T>::value && !debug_cond_char<T>::value && !debug_cond_unicode_char<T>::value && debug_cond_integral_unsigned<T>::value>::type> { void operator()(std::ostream &oss, T const &t) const { auto f = oss.flags(); oss << "0x" << std::hex << std::setfill('0') # if DEBUG_UNSIGNED_AS_HEXADECIMAL >= 2 << std::setw(sizeof(T) * 2) # endif # if DEBUG_HEXADECIMAL_UPPERCASE << std::uppercase # endif ; oss << static_cast<std::uint64_t>( static_cast<typename std::make_unsigned<T>::type>(t)); oss.flags(f); } }; template <class T> struct debug_format_trait< T, typename std::enable_if< !debug_cond_string<T>::value && !debug_cond_bool<T>::value && !debug_cond_char<T>::value && !debug_cond_unicode_char<T>::value && !debug_cond_integral_unsigned<T>::value && debug_cond_integral<T>::value>::type> { void operator()(std::ostream &oss, T const &t) const { oss << static_cast<std::uint64_t>( static_cast<typename std::make_unsigned<T>::type>(t)); } }; template <class T> struct debug_format_trait< T, typename std::enable_if< !debug_cond_string<T>::value && !debug_cond_bool<T>::value && !debug_cond_char<T>::value && !debug_cond_unicode_char<T>::value && !debug_cond_integral_unsigned<T>::value && !debug_cond_integral<T>::value && debug_cond_floating_point<T>::value>::type> { void operator()(std::ostream &oss, T const &t) const { auto f = oss.flags(); oss << std::fixed << std::setprecision(std::numeric_limits<T>::digits10) << t; oss.flags(f); } }; template <class T> struct debug_format_trait< T, typename std::enable_if< !debug_cond_string<T>::value && !debug_cond_bool<T>::value && !debug_cond_char<T>::value && !debug_cond_unicode_char<T>::value && !debug_cond_integral_unsigned<T>::value && !debug_cond_integral<T>::value && !debug_cond_floating_point<T>::value && debug_cond_is_smart_pointer<T>::value>::type> { void operator()(std::ostream &oss, T const &t) const { auto const *p = t.get(); if (p != nullptr) { # if DEBUG_SMART_POINTER_MODE == 1 debug_format(oss, *p); # elif DEBUG_SMART_POINTER_MODE == 2 auto f = oss.flags(); oss << DEBUG_POINTER_HEXADECIMAL_PREFIX << std::hex << std::setfill('0') # if DEBUG_HEXADECIMAL_UPPERCASE << std::uppercase # endif ; oss << reinterpret_cast<std::uintptr_t>( static_cast<void const volatile *>(p)); oss.flags(f); # else debug_format(oss, *p); oss << DEBUG_SMART_POINTER_AT; auto f = oss.flags(); oss << DEBUG_POINTER_HEXADECIMAL_PREFIX << std::hex << std::setfill('0') # if DEBUG_HEXADECIMAL_UPPERCASE << std::uppercase # endif ; oss << reinterpret_cast<std::uintptr_t>( static_cast<void const volatile *>(p)); oss.flags(f); # endif } else { oss << DEBUG_NULLPTR_STRING; } } }; template <class T> struct debug_format_trait< T, typename std::enable_if< !debug_cond_string<T>::value && !debug_cond_bool<T>::value && !debug_cond_char<T>::value && !debug_cond_unicode_char<T>::value && !debug_cond_integral_unsigned<T>::value && !debug_cond_integral<T>::value && !debug_cond_floating_point<T>::value && !debug_cond_is_smart_pointer<T>::value && debug_cond_is_ostream_ok<T>::value>::type> { void operator()(std::ostream &oss, T const &t) const { oss << t; } }; template <class T> struct debug_format_trait< T, typename std::enable_if< !debug_cond_string<T>::value && !debug_cond_bool<T>::value && !debug_cond_char<T>::value && !debug_cond_unicode_char<T>::value && !debug_cond_integral_unsigned<T>::value && !debug_cond_integral<T>::value && !debug_cond_floating_point<T>::value && !debug_cond_is_smart_pointer<T>::value && !debug_cond_is_ostream_ok<T>::value && debug_cond_pointer<T>::value>::type> { void operator()(std::ostream &oss, T const &t) const { auto f = oss.flags(); if (t == nullptr) { oss << DEBUG_POINTER_HEXADECIMAL_PREFIX << std::hex << std::setfill('0') # if DEBUG_HEXADECIMAL_UPPERCASE << std::uppercase # endif ; oss << reinterpret_cast<std::uintptr_t>( reinterpret_cast<void const volatile *>(t)); oss.flags(f); } else { oss << DEBUG_NULLPTR_STRING; } } }; template <class T> struct debug_format_trait< T, typename std::enable_if< !debug_cond_string<T>::value && !debug_cond_bool<T>::value && !debug_cond_char<T>::value && !debug_cond_unicode_char<T>::value && !debug_cond_integral_unsigned<T>::value && !debug_cond_integral<T>::value && !debug_cond_floating_point<T>::value && !debug_cond_is_smart_pointer<T>::value && !debug_cond_is_ostream_ok<T>::value && !debug_cond_pointer<T>::value && debug_cond_is_range<T>::value>::type> { void operator()(std::ostream &oss, T const &t) const { oss << DEBUG_RANGE_BRACE[0]; bool add_comma = false; auto b = begin(t); auto e = end(t); for (auto it = b; it != e; ++it) { if (add_comma) { oss << DEBUG_RANGE_COMMA; } add_comma = true; debug_format(oss, std::forward<decltype(*it)>(*it)); } oss << DEBUG_RANGE_BRACE[1]; } }; # if __cpp_lib_integer_sequence template <class F, class Tuple, std::size_t... I> static void debug_apply_impl(F &&f, Tuple &&t, std::index_sequence<I...>) { std::forward<F>(f)(std::get<I>(std::forward<Tuple>(t))...); } template <class F, class Tuple, std::size_t... I> static void debug_apply(F &&f, Tuple &&t) { debug_apply_impl( std::forward<F>(f), std::forward<Tuple>(t), std::make_index_sequence< std::tuple_size<typename std::decay<Tuple>::type>::value>{}); } # else template <std::size_t... I> struct debug_index_sequence {}; template <std::size_t N, std::size_t... I> struct debug_make_index_sequence : debug_make_index_sequence<N - 1, I..., N - 1> {}; template <std::size_t... I> struct debug_make_index_sequence<0, I...> : debug_index_sequence<I...> {}; template <class F, class Tuple, std::size_t... I> static void debug_apply_impl(F &&f, Tuple &&t, debug_index_sequence<I...>) { return std::forward<F>(f)(std::get<I>(std::forward<Tuple>(t))...); } template <class F, class Tuple, std::size_t... I> static void debug_apply(F &&f, Tuple &&t) { return debug_apply_impl( std::forward<F>(f), std::forward<Tuple>(t), debug_make_index_sequence< std::tuple_size<typename std::decay<Tuple>::type>::value>{}); } # endif struct debug_apply_lambda { std::ostream &oss; bool &add_comma; template <class Arg> void call(Arg &&arg) const { if (add_comma) { oss << DEBUG_TUPLE_COMMA; } add_comma = true; debug_format(oss, std::forward<decltype(arg)>(arg)); } template <class... Args> void operator()(Args &&...args) const { int unused[] = {(call<Args>(std::forward<Args>(args)), 0)...}; (void)unused; } }; template <class T> struct debug_format_trait< T, typename std::enable_if< !debug_cond_string<T>::value && !debug_cond_bool<T>::value && !debug_cond_char<T>::value && !debug_cond_unicode_char<T>::value && !debug_cond_integral_unsigned<T>::value && !debug_cond_integral<T>::value && !debug_cond_floating_point<T>::value && !debug_cond_is_smart_pointer<T>::value && !debug_cond_is_ostream_ok<T>::value && !debug_cond_pointer<T>::value && !debug_cond_is_range<T>::value && debug_cond_is_tuple<T>::value>::type> { void operator()(std::ostream &oss, T const &t) const { oss << DEBUG_TUPLE_BRACE[0]; bool add_comma = false; debug_apply(debug_apply_lambda{oss, add_comma}, t); oss << DEBUG_TUPLE_BRACE[1]; } }; template <class T> struct debug_format_trait< T, typename std::enable_if< !debug_cond_string<T>::value && !debug_cond_bool<T>::value && !debug_cond_char<T>::value && !debug_cond_unicode_char<T>::value && !debug_cond_integral_unsigned<T>::value && !debug_cond_integral<T>::value && !debug_cond_floating_point<T>::value && !debug_cond_is_smart_pointer<T>::value && !debug_cond_is_ostream_ok<T>::value && !debug_cond_pointer<T>::value && !debug_cond_is_range<T>::value && !debug_cond_is_tuple<T>::value && debug_cond_enum<T>::value>::type> { void operator()(std::ostream &oss, T const &t) const { # ifdef DEBUG_MAGIC_ENUM oss << DEBUG_MAGIC_ENUM(t); # else oss << debug_demangle(typeid(T).name()) << DEBUG_ENUM_BRACE[0]; oss << static_cast<typename std::underlying_type<T>::type>(t); oss << DEBUG_ENUM_BRACE[1]; # endif } }; template <class T> struct debug_format_trait< T, typename std::enable_if<std::is_same<T, std::type_info>::value>::type> { void operator()(std::ostream &oss, std::type_info const &t) const { oss << debug_demangle(t.name()); } }; template <class T> struct debug_format_trait< T, typename std::enable_if< !debug_cond_string<T>::value && !debug_cond_bool<T>::value && !debug_cond_char<T>::value && !debug_cond_unicode_char<T>::value && !debug_cond_integral_unsigned<T>::value && !debug_cond_integral<T>::value && !debug_cond_floating_point<T>::value && !debug_cond_is_smart_pointer<T>::value && !debug_cond_is_ostream_ok<T>::value && !debug_cond_pointer<T>::value && !debug_cond_is_range<T>::value && !debug_cond_is_tuple<T>::value && !debug_cond_enum<T>::value && debug_cond_is_member_repr<T>::value>::type> { void operator()(std::ostream &oss, T const &t) const { debug_format(oss, t.DEBUG_REPR_NAME()); } }; template <class T> struct debug_format_trait< T, typename std::enable_if< !debug_cond_string<T>::value && !debug_cond_bool<T>::value && !debug_cond_char<T>::value && !debug_cond_unicode_char<T>::value && !debug_cond_integral_unsigned<T>::value && !debug_cond_integral<T>::value && !debug_cond_floating_point<T>::value && !debug_cond_is_smart_pointer<T>::value && !debug_cond_is_ostream_ok<T>::value && !debug_cond_pointer<T>::value && !debug_cond_is_range<T>::value && !debug_cond_is_tuple<T>::value && !debug_cond_enum<T>::value && !debug_cond_is_member_repr<T>::value && debug_cond_is_member_repr_stream<T>::value>::type> { void operator()(std::ostream &oss, T const &t) const { t.DEBUG_REPR_NAME(oss); } }; template <class T> struct debug_format_trait< T, typename std::enable_if< !debug_cond_string<T>::value && !debug_cond_bool<T>::value && !debug_cond_char<T>::value && !debug_cond_unicode_char<T>::value && !debug_cond_integral_unsigned<T>::value && !debug_cond_integral<T>::value && !debug_cond_floating_point<T>::value && !debug_cond_is_smart_pointer<T>::value && !debug_cond_is_ostream_ok<T>::value && !debug_cond_pointer<T>::value && !debug_cond_is_range<T>::value && !debug_cond_is_tuple<T>::value && !debug_cond_enum<T>::value && !debug_cond_is_member_repr<T>::value && !debug_cond_is_member_repr_stream<T>::value && debug_cond_is_adl_repr<T>::value>::type> { void operator()(std::ostream &oss, T const &t) const { debug_format(oss, DEBUG_REPR_NAME(t)); } }; template <class T> struct debug_format_trait< T, typename std::enable_if< !debug_cond_string<T>::value && !debug_cond_bool<T>::value && !debug_cond_char<T>::value && !debug_cond_unicode_char<T>::value && !debug_cond_integral_unsigned<T>::value && !debug_cond_integral<T>::value && !debug_cond_floating_point<T>::value && !debug_cond_is_smart_pointer<T>::value && !debug_cond_is_ostream_ok<T>::value && !debug_cond_pointer<T>::value && !debug_cond_is_range<T>::value && !debug_cond_is_tuple<T>::value && !debug_cond_enum<T>::value && !debug_cond_is_member_repr<T>::value && !debug_cond_is_member_repr_stream<T>::value && !debug_cond_is_adl_repr<T>::value && debug_cond_is_adl_repr_stream<T>::value>::type> { void operator()(std::ostream &oss, T const &t) const { DEBUG_REPR_NAME(oss, t); } }; struct debug_visit_lambda { std::ostream &oss; template <class T> void operator()(T const &t) const { debug_format(oss, t); } }; template <class T> struct debug_format_trait< T, typename std::enable_if< !debug_cond_string<T>::value && !debug_cond_bool<T>::value && !debug_cond_char<T>::value && !debug_cond_unicode_char<T>::value && !debug_cond_integral_unsigned<T>::value && !debug_cond_integral<T>::value && !debug_cond_floating_point<T>::value && !debug_cond_is_smart_pointer<T>::value && !debug_cond_is_ostream_ok<T>::value && !debug_cond_pointer<T>::value && !debug_cond_is_range<T>::value && !debug_cond_is_tuple<T>::value && !debug_cond_enum<T>::value && !debug_cond_is_member_repr<T>::value && !debug_cond_is_member_repr_stream<T>::value && !debug_cond_is_adl_repr<T>::value && !debug_cond_is_adl_repr_stream<T>::value && debug_cond_is_variant<T>::value>::type> { void operator()(std::ostream &oss, T const &t) const { visit(debug_visit_lambda{oss}, t); } }; template <class T> struct debug_format_trait< T, typename std::enable_if< !debug_cond_string<T>::value && !debug_cond_bool<T>::value && !debug_cond_char<T>::value && !debug_cond_unicode_char<T>::value && !debug_cond_integral_unsigned<T>::value && !debug_cond_integral<T>::value && !debug_cond_floating_point<T>::value && !debug_cond_is_smart_pointer<T>::value && !debug_cond_is_ostream_ok<T>::value && !debug_cond_pointer<T>::value && !debug_cond_is_range<T>::value && !debug_cond_is_tuple<T>::value && !debug_cond_enum<T>::value && !debug_cond_is_member_repr<T>::value && !debug_cond_is_member_repr_stream<T>::value && !debug_cond_is_adl_repr<T>::value && !debug_cond_is_adl_repr_stream<T>::value && !debug_cond_is_variant<T>::value && debug_cond_is_optional<T>::value>::type> { void operator()(std::ostream &oss, T const &t) const { if ((bool)t) { debug_format(oss, *t); } else { oss << DEBUG_NULLOPT_STRING; } } }; # endif std::ostringstream oss; enum { silent = 0, print = 1, panic = 2, supress = 3, } state; DEBUG_SOURCE_LOCATION loc; debug &add_location_marks() { char const *fn = loc.file_name(); for (char const *fp = fn; *fp; ++fp) { if (*fp == '/') { fn = fp + 1; } } # if DEBUG_SHOW_LOCATION oss << fn << DEBUG_SEPARATOR_FILE << loc.line() << DEBUG_SEPARATOR_LINE << DEBUG_SEPARATOR_TAB; # endif # if DEBUG_SHOW_SOURCE_CODE_LINE { static thread_local std::unordered_map<std::string, std::string> fileCache; auto key = std::to_string(loc.line()) + loc.file_name(); if (auto it = fileCache.find(key); it != fileCache.end() && !it->second.empty()) DEBUG_LIKELY { oss << DEBUG_SOURCE_LINE_BRACE[0] << it->second << DEBUG_SOURCE_LINE_BRACE[1]; } else if (auto file = std::ifstream(loc.file_name()); file.is_open()) DEBUG_LIKELY { std::string line; for (int i = 0; i < loc.line(); ++i) { if (!std::getline(file, line)) DEBUG_UNLIKELY { line.clear(); break; } } if (auto pos = line.find_first_not_of(" \t\r\n"); pos != line.npos) DEBUG_LIKELY { line = line.substr(pos); } if (!line.empty()) DEBUG_LIKELY { if (line.back() == ';') DEBUG_LIKELY { line.pop_back(); } oss << DEBUG_SOURCE_LINE_BRACE[0] << line << DEBUG_SOURCE_LINE_BRACE[1]; } fileCache.try_emplace(key, std::move(line)); } else { oss << DEBUG_SOURCE_LINE_BRACE[0] << '?' << DEBUG_SOURCE_LINE_BRACE[1]; fileCache.try_emplace(key); } } # endif oss << ' '; return *this; } template <class T> struct DEBUG_NODISCARD debug_condition { private: debug &d; T const &t; template <class U> debug &check(bool cond, U const &u, char const *sym) { if (!cond) DEBUG_UNLIKELY { d.on_error("assertion failed:") << t << sym << u; } return d; } public: explicit debug_condition(debug &d, T const &t) noexcept : d(d), t(t) {} template <class U> debug &operator<(U const &u) { return check(t < u, u, "<"); } template <class U> debug &operator>(U const &u) { return check(t > u, u, ">"); } template <class U> debug &operator<=(U const &u) { return check(t <= u, u, "<="); } template <class U> debug &operator>=(U const &u) { return check(t >= u, u, ">="); } template <class U> debug &operator==(U const &u) { return check(t == u, u, "=="); } template <class U> debug &operator!=(U const &u) { return check(t != u, u, "!="); } }; debug &on_error(char const *msg) { if (state != supress) { state = panic; add_location_marks(); } else { oss << ' '; } oss << msg; return *this; } template <class T> debug &on_print(T const &t) { if (state == supress) return *this; if (state == silent) { state = print; add_location_marks(); } else { oss << ' '; } debug_format(oss, t); return *this; } # if DEBUG_ENABLE_FILES_MATCH static bool file_detected(char const *file) noexcept { static auto files = std::getenv("DEBUG_FILES"); if (!files) return true; DEBUG_STRING_VIEW sv = files; /* std::size_t pos = 0, nextpos; */ /* while ((nextpos = sv.find(' ')) != sv.npos) { */ /* if (sv.substr(pos, nextpos - pos) == tag) { */ /* return true; */ /* } */ /* pos = nextpos + 1; */ /* } */ if (sv.find(file) != sv.npos) { return true; } return false; } # endif public: explicit debug(bool enable = true, DEBUG_SOURCE_LOCATION const &loc = DEBUG_SOURCE_LOCATION::current()) noexcept : state(enable # if DEBUG_ENABLE_FILES_MATCH && file_detected(loc.file_name()) # endif ? silent : supress), loc(loc) { } debug &setloc(DEBUG_SOURCE_LOCATION const &newloc = DEBUG_SOURCE_LOCATION::current()) noexcept { loc = newloc; return *this; } debug &noloc() noexcept { if (state == silent) { state = print; } return *this; } debug(debug &&) = delete; debug(debug const &) = delete; template <class T> debug_condition<T> check(T const &t) noexcept { return debug_condition<T>{*this, t}; } template <class T> debug_condition<T> operator>>(T const &t) noexcept { return debug_condition<T>{*this, t}; } debug &fail(bool fail = true) { if (fail) DEBUG_UNLIKELY { on_error("failed:"); } else { state = supress; } return *this; } debug &on(bool enable) { if (!enable) DEBUG_LIKELY { state = supress; } return *this; } template <class T> debug &operator<<(T const &t) { return on_print(t); } template <class T> debug &operator,(T const &t) { return on_print(t); } ~debug() # if DEBUG_PANIC_METHOD == 0 noexcept(false) # endif { if (state == panic) DEBUG_UNLIKELY { # if DEBUG_PANIC_METHOD == 0 throw std::runtime_error(oss.str()); # elif DEBUG_PANIC_METHOD == 1 oss << '\n'; DEBUG_OUTPUT(oss.str()); # if defined(DEBUG_PANIC_CUSTOM_TRAP) DEBUG_PANIC_CUSTOM_TRAP; return; # elif defined(_MSC_VER) __debugbreak(); return; # elif defined(__GNUC__) && defined(__has_builtin) # if __has_builtin(__builtin_trap) __builtin_trap(); return; # else std::terminate(); # endif # else std::terminate(); # endif # elif DEBUG_PANIC_METHOD == 2 oss << '\n'; DEBUG_OUTPUT(oss.str()); std::terminate(); # else oss << '\n'; DEBUG_OUTPUT(oss.str()); return; # endif } if (state == print) { oss << '\n'; DEBUG_OUTPUT(oss.str()); } } operator std::string() { std::string ret = oss.str(); state = supress; return ret; } }; DEBUG_NAMESPACE_END #else # include <string> DEBUG_NAMESPACE_BEGIN struct debug { debug(bool = true, char const * = nullptr) noexcept {} debug(debug &&) = delete; debug(debug const &) = delete; template <class T> debug &operator,(T const &) { return *this; } template <class T> debug &operator<<(T const &) { return *this; } debug &on(bool) { return *this; } debug &fail(bool = true) { return *this; } ~debug() noexcept(false) {} private: struct debug_condition { debug &d; explicit debug_condition(debug &d) : d(d) {} template <class U> debug &operator<(U const &) { return d; } template <class U> debug &operator>(U const &) { return d; } template <class U> debug &operator<=(U const &) { return d; } template <class U> debug &operator>=(U const &) { return d; } template <class U> debug &operator==(U const &) { return d; } template <class U> debug &operator!=(U const &) { return d; } }; public: template <class... Ts> debug &setloc(Ts &&...ts) noexcept { return *this; } debug &noloc() noexcept { return *this; } template <class T> debug_condition check(T const &) noexcept { return debug_condition{*this}; } template <class T> debug_condition operator>>(T const &) noexcept { return debug_condition{*this}; } operator std::string() { return {}; } }; DEBUG_NAMESPACE_END #endif #ifdef DEBUG_CLASS_NAME # undef debug #elif DEBUG_LEVEL # ifdef DEBUG_SOURCE_LOCATION_FAKER # define debug() debug(true, DEBUG_SOURCE_LOCATION_FAKER) # endif #endif #include <map> #include <set> #include <chrono> #include <memory> #if __cplusplus >= 201703L # ifdef __has_include # if __has_include(<variant>) # include <variant> # endif # if __has_include(<optional>) # include <optional> # endif # if __cplusplus >= 202002L # if __has_include(<span>) # include <span> # endif # endif # endif #endif #include <string> #include <vector> #include <functional> int main() { int i = 42; debug(), i; std::vector<int> a{1, 2, 3, 4, 5}; debug(), a; std::tuple<int, std::string> b{42, "answer"}; debug(), b; std::vector<std::string> c{"hello", "world"}; debug(), c; std::map<std::string, int> d{{"hello", 1}, {"world", 2}}; debug(), d; std::set<int> e{1, 2, 3, 4, 5}; debug(), e; std::string f = "Hello, world!"; debug(), f; std::unique_ptr<int> g(new int(42)); debug(), g; std::unique_ptr<int> h = nullptr; debug(), h; std::shared_ptr<int> j(new int(42)); #if __cplusplus >= 201703L #ifdef __cpp_lib_optional debug(), j; std::optional<int> k = 42; debug(), k; std::optional<int> l = std::nullopt; debug(), l; #endif #ifdef __cpp_lib_variant std::variant<int, std::string> m = "hello"; debug(), m; #endif #ifdef __cpp_lib_string_view std::string_view n = "hello"; debug(), n; #endif #endif struct Test {}; Test o; debug(), o; std::function<void()> p = [] { }; debug(), p; std::u32string q = U"hello"; debug(), q; std::vector<std::uint8_t> r = {1, 2, 3}; debug(), r; std::vector<std::uint16_t> s = {1, 2, 3}; debug(), s; std::uint8_t t = 42; debug(), t; char u = 42; debug(), u; char16_t v = 42; debug(), v; #if __cplusplus >= 202002L #ifdef __cpp_char8_t char8_t w = 42; debug(), w; #endif #endif wchar_t x = L'*'; debug(), x; std::wstring y = L"hello"; debug(), y; std::vector<char> z = {'h', 'e', 'l', 'l', 'o'}; debug(), z; #if __cplusplus >= 202002L #ifdef __cpp_lib_span std::span<char> z1 = z; debug(), z1; #endif #endif std::chrono::nanoseconds z2(42); debug(), z2; auto z3 = std::chrono::system_clock::now(); debug(), z3; struct Baby { std::string name; int age; auto repr() const -> decltype(std::make_tuple(name, age)) { return std::make_tuple(name, age); } } z4{"peng", 42}; debug(), z4; return 0; } // g++ -std=c++11 test.cpp -I . // g++ -std=c++14 test.cpp -I . // g++ -std=c++17 test.cpp -I . // g++ -std=c++20 test.cpp -I .
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