[Solved] error: no template named 'remove_cv_t' in namespace 'std'; did you mean 'remove_cv'
Article
Mashpy Rahman
Problem:
Getting error while installing yarn in a ruby on rails project. Here is the error -
../src/libsass/src/ast.hpp:1614:25: warning: loop variable 'numerator' of type 'const std::__1::basic_string' creates a copy from type 'const std::__1::basic_string ' [-Wrange-loop-analysis] for (const auto numerator : numerators) ^ ../src/libsass/src/ast.hpp:1614:14: note: use reference type 'const std::__1::basic_string &' to prevent copying for (const auto numerator : numerators) ^~~~~~~~~~~~~~~~~~~~~~ & ../src/libsass/src/ast.hpp:1616:25: warning: loop variable 'denominator' of type 'const std::__1::basic_string ' creates a copy from type 'const std::__1::basic_string ' [-Wrange-loop-analysis] for (const auto denominator : denominators) ^ ../src/libsass/src/ast.hpp:1616:14: note: use reference type 'const std::__1::basic_string &' to prevent copying for (const auto denominator : denominators) ^~~~~~~~~~~~~~~~~~~~~~~~ & 2 warnings generated. rm -f Release/sass.a && ./gyp-mac-tool filter-libtool libtool -static -o Release/sass.a Release/obj.target/libsass/src/libsass/src/ast.o Release/obj.target/libsass/src/libsass/src/ast_fwd_decl.o Release/obj.target/libsass/src/libsass/src/backtrace.o Release/obj.target/libsass/src/libsass/src/base64vlq.o Release/obj.target/libsass/src/libsass/src/bind.o Release/obj.target/libsass/src/libsass/src/cencode.o Release/obj.target/libsass/src/libsass/src/check_nesting.o Release/obj.target/libsass/src/libsass/src/color_maps.o Release/obj.target/libsass/src/libsass/src/constants.o Release/obj.target/libsass/src/libsass/src/context.o Release/obj.target/libsass/src/libsass/src/cssize.o Release/obj.target/libsass/src/libsass/src/emitter.o Release/obj.target/libsass/src/libsass/src/environment.o Release/obj.target/libsass/src/libsass/src/error_handling.o Release/obj.target/libsass/src/libsass/src/eval.o Release/obj.target/libsass/src/libsass/src/expand.o Release/obj.target/libsass/src/libsass/src/extend.o Release/obj.target/libsass/src/libsass/src/file.o Release/obj.target/libsass/src/libsass/src/functions.o Release/obj.target/libsass/src/libsass/src/inspect.o Release/obj.target/libsass/src/libsass/src/json.o Release/obj.target/libsass/src/libsass/src/lexer.o Release/obj.target/libsass/src/libsass/src/listize.o Release/obj.target/libsass/src/libsass/src/memory/SharedPtr.o Release/obj.target/libsass/src/libsass/src/node.o Release/obj.target/libsass/src/libsass/src/operators.o Release/obj.target/libsass/src/libsass/src/output.o Release/obj.target/libsass/src/libsass/src/parser.o Release/obj.target/libsass/src/libsass/src/plugins.o Release/obj.target/libsass/src/libsass/src/position.o Release/obj.target/libsass/src/libsass/src/prelexer.o Release/obj.target/libsass/src/libsass/src/remove_placeholders.o Release/obj.target/libsass/src/libsass/src/sass.o Release/obj.target/libsass/src/libsass/src/sass2scss.o Release/obj.target/libsass/src/libsass/src/sass_context.o Release/obj.target/libsass/src/libsass/src/sass_functions.o Release/obj.target/libsass/src/libsass/src/sass_util.o Release/obj.target/libsass/src/libsass/src/sass_values.o Release/obj.target/libsass/src/libsass/src/source_map.o Release/obj.target/libsass/src/libsass/src/subset_map.o Release/obj.target/libsass/src/libsass/src/to_c.o Release/obj.target/libsass/src/libsass/src/to_value.o Release/obj.target/libsass/src/libsass/src/units.o Release/obj.target/libsass/src/libsass/src/utf8_string.o Release/obj.target/libsass/src/libsass/src/util.o Release/obj.target/libsass/src/libsass/src/values.o c++ '-DNODE_GYP_MODULE_NAME=binding' '-DUSING_UV_SHARED=1' '-DUSING_V8_SHARED=1' '-DV8_DEPRECATION_WARNINGS=1' '-DV8_DEPRECATION_WARNINGS' '-DV8_IMMINENT_DEPRECATION_WARNINGS' '-D_GLIBCXX_USE_CXX11_ABI=1' '-D_DARWIN_USE_64_BIT_INODE=1' '-D_LARGEFILE_SOURCE' '-D_FILE_OFFSET_BITS=64' '-DBUILDING_NODE_EXTENSION' -I/Users/st/.node-gyp/16.0.0/include/node -I/Users/st/.node-gyp/16.0.0/src -I/Users/st/.node-gyp/16.0.0/deps/openssl/config -I/Users/st/.node-gyp/16.0.0/deps/openssl/openssl/include -I/Users/st/.node-gyp/16.0.0/deps/uv/include -I/Users/st/.node-gyp/16.0.0/deps/zlib -I/Users/st/.node-gyp/16.0.0/deps/v8/include -I../../nan -I../src/libsass/include -O3 -gdwarf-2 -mmacosx-version-min=10.7 -arch x86_64 -Wall -Wendif-labels -W -Wno-unused-parameter -std=c++11 -stdlib=libc++ -fno-rtti -fno-exceptions -fno-strict-aliasing -MMD -MF ./Release/.deps/Release/obj.target/binding/src/binding.o.d.raw -c -o Release/obj.target/binding/src/binding.o ../src/binding.cpp In file included from ../src/binding.cpp:1: In file included from ../../nan/nan.h:56: In file included from /Users/st/.node-gyp/16.0.0/include/node/node.h:63: In file included from /Users/st/.node-gyp/16.0.0/include/node/v8.h:30: /Users/st/.node-gyp/16.0.0/include/node/v8-internal.h:452:38: error: no template named 'remove_cv_t' in namespace 'std'; did you mean 'remove_cv'? !std::is_same>::value>::Perform(data); ~~~~~^~~~~~~~~~~ remove_cv /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/type_traits:697:50: note: 'remove_cv' declared here template struct _LIBCPP_TEMPLATE_VIS remove_cv ^ 1 error generated. make: *** [Release/obj.target/binding/src/binding.o] Error 1 gyp ERR! build error gyp ERR! stack Error: `make` failed with exit code: 2 gyp ERR! stack at ChildProcess.onExit (/Users/st/rails/myapp/node_modules/node-gyp/lib/build.js:262:23) gyp ERR! stack at ChildProcess.emit (node:events:365:28) gyp ERR! stack at Process.ChildProcess._handle.onexit (node:internal/child_process:290:12) gyp ERR! System Darwin 20.3.0 gyp ERR! command "/usr/local/Cellar/node/16.0.0/bin/node" "/Users/st/rails/myapp/node_modules/node-gyp/bin/node-gyp.js" "rebuild" "--verbose" "--libsass_ext=" "--libsass_cflags=" "--libsass_ldflags=" "--libsass_library=" gyp ERR! cwd /Users/st/rails/myapp/node_modules/node-sass gyp ERR! node -v v16.0.0 gyp ERR! node-gyp -v v3.8.0 gyp ERR! not ok ,>
Solution :
node-sass is not yet compatible with node v16. For this reason you have to downgrade node version to 14. To downgrade run -
nvm install 14
Now set the 14 version globally -
nvm alias default 14
Then your app need to configure with v14. To do this -
1. Go to your project directory and stop Rails server if it is running.
2. Open fresh new terminal and run "node --version". It should show 14.
3. Run - "spring stop"
4. Remove "yarn.lock" file
5. Remove existing node modules. Run - "rm -rf node_modules"
6. Run "node --version". It should show 14. If not then run - "nvm install 14"
7. Reinstall Yarn. Run - "yarn install". It should work without any error message.
8. Now turn on the rails server.
For Mac you can run -
brew install node@14 brew unlink node brew link node@14 node -v spring stop
Then run "yarn install" on rails project.
Thanks for reading the article. If you have any question please comment below.