compilation warnings

[MichaelChirico]

Hi, I installed the package and got some compilation warnings:

dfa.cc:72:19: warning: unused variable 'ExtraDebug' [-Wunused-const-variable]
static const bool ExtraDebug = false;
                  ^
1 warning generated.
clang++ -mmacosx-version-min=10.13 -std=gnu++11 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I../inst/include -DNDEBUG -I'/Library/Frameworks/R.framework/Versions/4.0/Resources/library/Rcpp/include' -I'/Library/Frameworks/R.framework/Versions/4.0/Resources/library/RcppParallel/include' -I/usr/local/opt/gettext/include -I/usr/local/opt/llvm/include   -fPIC  -Wall -g -O2  -c mimics_pcre.cc -o mimics_pcre.o
clang++ -mmacosx-version-min=10.13 -std=gnu++11 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I../inst/include -DNDEBUG -I'/Library/Frameworks/R.framework/Versions/4.0/Resources/library/Rcpp/include' -I'/Library/Frameworks/R.framework/Versions/4.0/Resources/library/RcppParallel/include' -I/usr/local/opt/gettext/include -I/usr/local/opt/llvm/include   -fPIC  -Wall -g -O2  -c nfa.cc -o nfa.o
nfa.cc:44:19: warning: unused variable 'ExtraDebug' [-Wunused-const-variable]
static const bool ExtraDebug = false;
                  ^
1 warning generated.
clang++ -mmacosx-version-min=10.13 -std=gnu++11 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I../inst/include -DNDEBUG -I'/Library/Frameworks/R.framework/Versions/4.0/Resources/library/Rcpp/include' -I'/Library/Frameworks/R.framework/Versions/4.0/Resources/library/RcppParallel/include' -I/usr/local/opt/gettext/include -I/usr/local/opt/llvm/include   -fPIC  -Wall -g -O2  -c onepass.cc -o onepass.o
onepass.cc:76:19: warning: unused variable 'ExtraDebug' [-Wunused-const-variable]
static const bool ExtraDebug = false;
                  ^
1 warning generated.
clang++ -mmacosx-version-min=10.13 -std=gnu++11 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I../inst/include -DNDEBUG -I'/Library/Frameworks/R.framework/Versions/4.0/Resources/library/Rcpp/include' -I'/Library/Frameworks/R.framework/Versions/4.0/Resources/library/RcppParallel/include' -I/usr/local/opt/gettext/include -I/usr/local/opt/llvm/include   -fPIC  -Wall -g -O2  -c parse.cc -o parse.o
clang++ -mmacosx-version-min=10.13 -std=gnu++11 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I../inst/include -DNDEBUG -I'/Library/Frameworks/R.framework/Versions/4.0/Resources/library/Rcpp/include' -I'/Library/Frameworks/R.framework/Versions/4.0/Resources/library/RcppParallel/include' -I/usr/local/opt/gettext/include -I/usr/local/opt/llvm/include   -fPIC  -Wall -g -O2  -c perl_groups.cc -o perl_groups.o
clang++ -mmacosx-version-min=10.13 -std=gnu++11 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I../inst/include -DNDEBUG -I'/Library/Frameworks/R.framework/Versions/4.0/Resources/library/Rcpp/include' -I'/Library/Frameworks/R.framework/Versions/4.0/Resources/library/RcppParallel/include' -I/usr/local/opt/gettext/include -I/usr/local/opt/llvm/include   -fPIC  -Wall -g -O2  -c prog.cc -o prog.o
clang++ -mmacosx-version-min=10.13 -std=gnu++11 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I../inst/include -DNDEBUG -I'/Library/Frameworks/R.framework/Versions/4.0/Resources/library/Rcpp/include' -I'/Library/Frameworks/R.framework/Versions/4.0/Resources/library/RcppParallel/include' -I/usr/local/opt/gettext/include -I/usr/local/opt/llvm/include   -fPIC  -Wall -g -O2  -c re2.cc -o re2.o
clang++ -mmacosx-version-min=10.13 -std=gnu++11 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I../inst/include -DNDEBUG -I'/Library/Frameworks/R.framework/Versions/4.0/Resources/library/Rcpp/include' -I'/Library/Frameworks/R.framework/Versions/4.0/Resources/library/RcppParallel/include' -I/usr/local/opt/gettext/include -I/usr/local/opt/llvm/include   -fPIC  -Wall -g -O2  -c re2r_attr.cpp -o re2r_attr.o
re2r_attr.cpp:178:10: warning: lambda capture 'this' is not used [-Wunused-lambda-capture]
        [this, &tt](tr2::optional<string> &x) -> tr2::optional<string> {
         ^~~~~
1 warning generated.

[qinwf]

Thanks for the report. These are unused dead code warnings and should be safe code.