Mercurial > projects > ldc
view gen/cl_helpers.cpp @ 1317:4099548c80e0
Allocate objects on the stack if they (a) don't have a destructor, and
(b) don't override the delete operator (on top of the regular conditions for
stack allocation that also apply to arrays, structs, etc.).
The "no destructor" clause is not strictly necessary, but calling them at the
right time would be tricky to say the least; it would involve, among other
things, "manually" inserting a try-finally block around anything that might
throw exceptions not caught in the current function.
Note: objects with custom new operators are automatically ignored because they
don't use the regular allocation runtime call, so there's no need to pay special
attention to them.
author | Frits van Bommel <fvbommel wxs.nl> |
---|---|
date | Sat, 09 May 2009 00:50:15 +0200 |
parents | b30fe7e1dbb9 |
children | 40bd4a0d4870 |
line wrap: on
line source
#include "gen/cl_helpers.h" #include "root.h" #include "rmem.h" #include <cctype> // isupper, tolower #include <algorithm> #include <utility> #include <stdarg.h> namespace opts { // Helper function static char toLower(char c) { if (isupper(c)) return tolower(c); return c; } bool FlagParser::parse(cl::Option &O, const char *ArgName, const std::string &Arg, bool &Val) { // Make a std::string out of it to make comparisons easier // (and avoid repeated conversion) std::string argname = ArgName; typedef std::vector<std::pair<std::string, bool> >::iterator It; for (It I = switches.begin(), E = switches.end(); I != E; ++I) { std::string name = I->first; if (name == argname || (name.length() < argname.length() && argname.substr(0, name.length()) == name && argname[name.length()] == '=')) { if (!cl::parser<bool>::parse(O, ArgName, Arg, Val)) { Val = (Val == I->second); return false; } // Invalid option value break; } } return true; } void FlagParser::getExtraOptionNames(std::vector<const char*> &Names) { typedef std::vector<std::pair<std::string, bool> >::iterator It; for (It I = switches.begin() + 1, E = switches.end(); I != E; ++I) { Names.push_back(I->first.c_str()); } } MultiSetter::MultiSetter(bool invert, bool* p, ...) { this->invert = invert; if (p) { locations.push_back(p); va_list va; va_start(va, p); while (p = va_arg(va, bool*)) { locations.push_back(p); } } } void MultiSetter::operator=(bool val) { typedef std::vector<bool*>::iterator It; for (It I = locations.begin(), E = locations.end(); I != E; ++I) { **I = (val != invert); } } void ArrayAdapter::push_back(const char* cstr) { if (!cstr || !*cstr) error("Expected argument to '-%s'", name); if (!*arrp) *arrp = new Array; (*arrp)->push(mem.strdup(cstr)); } } // namespace opts