clang++

问题 I am trying to run Ale as my linter, which in turn uses clang-check to lint my code. $ clang-check FeatureManager.h Error while trying to load a compilation database: Could not auto-detect compilation database for file "FeatureManager.h" No compilation database found in /home/babbleshack/ or any parent directory json-compilation-database: Error while opening JSON database: No such file or directory Running without flags. /home/babbleshack/FeatureManager.h:6:10: fatal error: 'unordered_map'

问题 I am trying to run Ale as my linter, which in turn uses clang-check to lint my code. $ clang-check FeatureManager.h Error while trying to load a compilation database: Could not auto-detect compilation database for file "FeatureManager.h" No compilation database found in /home/babbleshack/ or any parent directory json-compilation-database: Error while opening JSON database: No such file or directory Running without flags. /home/babbleshack/FeatureManager.h:6:10: fatal error: 'unordered_map'

问题 considering the following range based for loop in C++ 11 for ( T k : j ) { ... } there are g++ or clang++ optimization flags that can speed up the compiled code ? I'm not talking about any for cycle I'm only considering this new C++11 construct. 回答1: Optimizing loops is very rarely about optimizing the actual loop iteration code ( for ( T k : j ) in this case), but very much about optimizing what is IN the loop. Now, since this is ... in this case, it's impossible to say if, for example,

问题 I have the following script that attempts to print out all the AST nodes in a given C++ file. This works fine when using it on a simple file with trivial includes (header file in the same directory, etc). #!/usr/bin/env python from argparse import ArgumentParser, FileType from clang import cindex def node_info(node): return {'kind': node.kind, 'usr': node.get_usr(), 'spelling': node.spelling, 'location': node.location, 'file': node.location.file.name, 'extent.start': node.extent.start,

问题 I'm trying to get address sanitizer blacklist working in a C++ project but its not working as expected. I tried the example on their website, if I compile with clang , it works fine. build % cat suppress.txt fun:bad_foo build % cat foo.c #include <stdlib.h> void bad_foo() { int *a = (int*)malloc(40); a[10] = 1; } int main() { bad_foo(); } build % clang -fsanitize=address -fsanitize-blacklist=suppress.txt foo.c ; ./a.out Exit code: 0 But as soon as I use clang++ , its ignored. build % cp foo.c

问题 While trying to write a class that times the duration between calling it's constructor and destructor, I ran into what I think is a bug in clang. (Edit: it's not a bug; it's implementation defined copy elision) The timer struct below keeps a pointer to the duration object that's passed in as reference and adds the duration of the scope to this. #include <iostream> #include <chrono> struct timer { using clock = std::chrono::high_resolution_clock; using time_point = clock::time_point; using

问题 This is a perennial question here, but: does anyone know if there is a way to get Visual Studio 2015, with the Clang tool chain installed (tab for "cross compilation") to enable the 2017 features that Clang itself normally supports? For example, I would like this to compile: constexpr bool test(bool a){bool b= false; b = b || a; return b;} static_assert(test(true),""); With Clang itself, version 3.7, from command line with --std=++1z, this will compile correctly, but Visual Studio C++ is not

问题 I have a program in Qt creator that compiles and runs fine in a Windows machine. But as soon as I tried to compile it in a Mac OS X (10.9) I received these messages: Undefined symbols for architecture x86_64: "std::__1::__basic_string_common<true>::__throw_length_error() const", referenced from: std::__1::enable_if<__is_forward_iterator<char*>::value, void>::type std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >::__init<char*>(char*, char*) in

问题 If I will compile something(x.cpp) with clang++ and generate dynamic link library, let's say x.so files and i will use that .so files in other source(y.cpp) which i am compiling using g++, so do I get any run time error. 来源： https://stackoverflow.com/questions/59623819/compilation-of-two-files-from-different-compiler-one-is-using-other

问题 TL;DR; How to get the macro name used for size of a constant size array declaration, from a callExpr -> arg_0 -> DeclRefExpr. Detailed Problem statement: Recently I started working on a challenge which requires source to source transformation tool for modifying specific function calls with an additional argument. Reasearching about the ways i can acheive introduced me to this amazing toolset Clang. I've been learning how to use different tools provided in libtooling to acheive my goal. But