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squashing in commit of #663
commit 43e53b0 Merge: 886f5df a15ba45 Author: Dirk Eddelbuettel <edd@debian.org> Date: Tue Apr 11 13:20:10 2017 -0500 Merge pull request #663 from jimhester/exceptions_without_callstacks Added support for throwing exceptions without call stacks. commit a15ba45 Author: Jim Hester <james.f.hester@gmail.com> Date: Mon Apr 3 16:11:24 2017 -0400 Added support for throwing exceptions without call stacks.
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‎ChangeLog

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@@ -36,6 +36,14 @@
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renamed modules
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* inst/unitTests/testRcppModule/tests/modules.R: Call renamed module
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2017-04-03 Jim Hester <james.f.hester@gmail.com>
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* inst/include/Rcpp/exceptions.h: Added support for throwing
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exceptions without call stacks.
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* inst/include/Rcpp/macros/macros.h: Idem
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* inst/unitTests/cpp/exceptions.cpp: Idem
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* inst/unitTests/runit.exceptions.R: Idem
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2017-03-28 James J Balamuta <balamut2@illinois.edu>
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* inst/vignettes/Rcpp-FAQ.Rnw: Added "Known Issues" section to FAQ

‎inst/NEWS.Rd

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@@ -14,6 +14,8 @@
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\item Added a Known Issues section to the Rcpp FAQ vignette
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(James Balamuta in \ghpr{661} addressing \ghit{628}, \ghit{563},
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\ghit{552}, \ghit{460}, \ghit{419}, and \ghit{251}).
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\item Rcpp::exceptions can now be constructed without a call stack (Jim
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Hester in \ghpr{663}).
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}
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}
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}

‎inst/include/Rcpp/exceptions.h

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@@ -28,25 +28,33 @@ namespace Rcpp {
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class exception : public std::exception {
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public:
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explicit exception(const char* message_) : message(message_) { // #nocov start
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explicit exception(const char* message_, bool include_call = true) : // #nocov start
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message(message_),
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include_call_(include_call){
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rcpp_set_stack_trace(stack_trace());
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}
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exception(const char* message_, const char* file, int line) : message(message_) {
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exception(const char* message_, const char* file, int line, bool include_call = true) :
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message(message_),
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include_call_(include_call){
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rcpp_set_stack_trace(stack_trace(file,line));
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}
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bool include_call() const {
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return include_call_;
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}
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virtual ~exception() throw() {}
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virtual const char* what() const throw() {
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return message.c_str(); // #nocov end
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}
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private:
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std::string message;
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bool include_call_;
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};
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// simple helper
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static std::string toString(const int i) { // #nocov start
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std::ostringstream ostr;
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ostr << i;
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return ostr.str(); // #nocov end
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return ostr.str(); // #nocov end
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}
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class no_such_env : public std::exception {
@@ -127,7 +135,7 @@ namespace Rcpp {
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RCPP_EXCEPTION_CLASS(binding_is_locked, std::string("binding is locked: '") + message + "'" )
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RCPP_EXCEPTION_CLASS(no_such_namespace, std::string("no such namespace: '") + message + "'" )
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RCPP_EXCEPTION_CLASS(function_not_exported, std::string("function not exported: ") + message)
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RCPP_EXCEPTION_CLASS(eval_error, message ) // #nocov end
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RCPP_EXCEPTION_CLASS(eval_error, message ) // #nocov end
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#undef RCPP_EXCEPTION_CLASS
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#undef RCPP_SIMPLE_EXCEPTION_CLASS
@@ -217,6 +225,24 @@ inline SEXP make_condition(const std::string& ex_msg, SEXP call, SEXP cppstack,
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return res ;
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}
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inline SEXP rcpp_exception_to_r_condition(const Rcpp::exception& ex) {
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std::string ex_class = demangle( typeid(ex).name() ) ;
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std::string ex_msg = ex.what() ;
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SEXP call, cppstack;
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if (ex.include_call()) {
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call = Rcpp::Shield<SEXP>(get_last_call());
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cppstack = Rcpp::Shield<SEXP>( rcpp_get_stack_trace());
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} else {
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call = R_NilValue;
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cppstack = R_NilValue;
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}
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Rcpp::Shield<SEXP> classes( get_exception_classes(ex_class) );
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Rcpp::Shield<SEXP> condition( make_condition( ex_msg, call, cppstack, classes) );
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rcpp_set_stack_trace( R_NilValue ) ;
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return condition ;
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}
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inline SEXP exception_to_r_condition( const std::exception& ex){
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std::string ex_class = demangle( typeid(ex).name() ) ;
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std::string ex_msg = ex.what() ;
@@ -245,7 +271,7 @@ inline SEXP string_to_try_error( const std::string& str){
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Rf_setAttrib( tryError, R_ClassSymbol, Rf_mkString("try-error") ) ;
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Rf_setAttrib( tryError, Rf_install( "condition") , simpleError ) ;
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return tryError; // #nocov end
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return tryError; // #nocov end
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}
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inline SEXP exception_to_try_error( const std::exception& ex){
@@ -313,7 +339,7 @@ namespace Rcpp{
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inline void NORET stop(const std::string& message) { // #nocov start
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throw Rcpp::exception(message.c_str());
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} // #nocov end
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} // #nocov end
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template <typename T1>
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inline void NORET stop(const char* fmt, const T1& arg1) {
@@ -366,7 +392,14 @@ namespace Rcpp{
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}
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}
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inline void forward_exception_to_r( const std::exception& ex){
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inline void forward_exception_to_r(const std::exception& ex){
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SEXP stop_sym = Rf_install( "stop" ) ;
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Rcpp::Shield<SEXP> condition( exception_to_r_condition(ex) );
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Rcpp::Shield<SEXP> expr( Rf_lang2( stop_sym , condition ) ) ;
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Rf_eval( expr, R_GlobalEnv ) ;
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}
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inline void forward_rcpp_exception_to_r(const Rcpp::exception& ex) {
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SEXP stop_sym = Rf_install( "stop" ) ;
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Rcpp::Shield<SEXP> condition( exception_to_r_condition(ex) );
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Rcpp::Shield<SEXP> expr( Rf_lang2( stop_sym , condition ) ) ;

‎inst/include/Rcpp/macros/macros.h

Lines changed: 6 additions & 1 deletion
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@@ -39,10 +39,15 @@
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catch( Rcpp::internal::InterruptedException &__ex__) { \
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rcpp_output_type = 1 ; \
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} \
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catch(Rcpp::exception& __ex__) { \
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rcpp_output_type = 2 ; \
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rcpp_output_condition = PROTECT(rcpp_exception_to_r_condition(__ex__)) ; \
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} \
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catch( std::exception& __ex__ ){ \
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rcpp_output_type = 2 ; \
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rcpp_output_condition = PROTECT(exception_to_r_condition(__ex__)) ; \
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} catch( ... ){ \
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} \
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catch( ... ){ \
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rcpp_output_type = 2 ; \
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rcpp_output_condition = PROTECT(string_to_try_error("c++ exception (unknown reason)")) ; \
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} \

‎inst/unitTests/cpp/exceptions.cpp

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@@ -62,3 +62,8 @@ double f1(double val) {
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double takeLogNested(double val) {
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return f1(val);
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}
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// [[Rcpp::export]]
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void noCall() {
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throw Rcpp::exception("Testing", false);
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}

‎inst/unitTests/runit.exceptions.R

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@@ -110,4 +110,14 @@ test.rcppExceptionLocation <- function() {
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checkEquals(nested$call, quote(takeLogNested(x)))
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}
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test.rcppExceptionNoCall <- function() {
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# Can throw exceptions that don't include a call stack
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e <- tryCatch(noCall(), error = identity)
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checkIdentical(e$message, "Testing")
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checkIdentical(e$call, NULL)
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checkIdentical(e$cppstack, NULL)
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checkIdentical(class(e), c("Rcpp::exception", "C++Error", "error", "condition"))
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}
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}

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