--- parser3/src/classes/op.C 2016/04/17 20:20:48 1.227 +++ parser3/src/classes/op.C 2016/05/11 22:28:48 1.229 @@ -18,7 +18,7 @@ #include "pa_vclass.h" #include "pa_charset.h" -volatile const char * IDENT_OP_C="$Id: op.C,v 1.227 2016/04/17 20:20:48 moko Exp $"; +volatile const char * IDENT_OP_C="$Id: op.C,v 1.229 2016/05/11 22:28:48 moko Exp $"; // limits @@ -522,17 +522,28 @@ struct Try_catch_result { Try_catch_result(): exception_should_be_handled(0) {} }; + +/// Auto-object used for temporary changing Request::skip. +class Temp_skip { + Request& frequest; + Request::Skip saved_skip; +public: + Temp_skip(Request& arequest) : frequest(arequest), saved_skip(arequest.get_skip()) { + arequest.set_skip(Request::SKIP_NOTHING); + } + ~Temp_skip() { + if(frequest.get_skip() == Request::SKIP_NOTHING) + frequest.set_skip(saved_skip); + } +}; #endif /// used by ^try and ^cache, @returns $exception.handled[string] if any template -static Try_catch_result try_catch(Request& r, - StringOrValue body_code(Request&, I), I info, - Value* catch_code, - bool could_be_handled_by_caller=false) -{ +static Try_catch_result try_catch(Request& r, StringOrValue body_code(Request&, I), I info, Value* catch_code, bool could_be_handled_by_caller=false) { Try_catch_result result; + // minor bug: context not restored if only finally code is present, see #1062 if(!catch_code) { result.processed_code=body_code(r, info); return result; @@ -543,39 +554,30 @@ static Try_catch_result try_catch(Reques try { result.processed_code=body_code(r, info); } catch(const Exception& e) { - Request_context_saver throw_context(r); // taking snapshot of throw-context [stack trace contains error] Request::Exception_details details=r.get_details(e); - try_context.restore(); // restoring try-context to perform catch-code - - Junction* junction=catch_code->get_junction(); - Value* method_frame=junction->method_frame; - Value* saved_exception_var_value=method_frame->get_element(exception_var_name); - VMethodFrame& frame=*junction->method_frame; - frame.put_element(exception_var_name, &details.vhash); + try_context.restore(); // restoring try-context for code after try and catch-code - result.processed_code=r.process(*catch_code); + { + Temp_value_element temp(r, *catch_code->get_junction()->method_frame, exception_var_name, &details.vhash); + Temp_skip temp_skip(r); + result.processed_code=r.process(*catch_code); + } - // retriving $exception.handled, restoring $exception var + // retriving $exception.handled Value* vhandled=details.vhash.hash().get(exception_handled_part_name); - frame.put_element(exception_var_name, saved_exception_var_value); bool bhandled=false; if(vhandled) { if(vhandled->is_string()) { // not simple $exception.handled(1/0)? - if(could_be_handled_by_caller) { // and we can possibly handle it + if(bhandled=could_be_handled_by_caller) { // and we can possibly handle it result.exception_should_be_handled=vhandled->get_string(); // considering 'recovered' and let the caller recover - return result; } - - bhandled=false; } else bhandled=vhandled->as_bool(); } - if(!bhandled) { - throw_context.restore(); // restoring throw-context [exception were not handled] + if(!bhandled) rethrow; - } } return result; @@ -689,12 +691,14 @@ const String* locked_process_and_cache_p cache_delete(file_spec); return result; } + #ifndef DOXYGEN struct Cache_get_result { const String* body; bool expired; }; #endif + static Cache_get_result cache_get(Request_charsets& charsets, const String& file_spec, time_t now) { Cache_get_result result={0, false}; @@ -731,9 +735,11 @@ static time_t as_expires(Request& r, Met return result; } + static const String& as_file_spec(Request& r, MethodParams& params, int index) { return r.absolute(params.as_string(index, "filespec must be string")); } + static void _cache(Request& r, MethodParams& params) { if(params.count()==0) { // ^cache[] -- return current expiration time @@ -829,16 +835,26 @@ static void _try_operator(Request& r, Me Try_catch_result result; StringOrValue finally_result; + try{ + // process try and catch code result=try_catch(r, process_try_body_code, &body_code, &catch_code); } catch(...){ - if(finally_code) + // process finally code but ignore the result + if(finally_code){ + Temp_skip temp(r); finally_result=r.process(*finally_code); + } rethrow; } - if(finally_code) + // process finally code + if(finally_code){ + Temp_skip temp(r); finally_result=r.process(*finally_code); + } + + // no exception in try, catch or finally, writing the result // write out processed body_code or catch_code r.write_pass_lang(result.processed_code);