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view gen/cl_helpers.h @ 1418:f5f8c21ce6ef
Make "`aa[key]`" use the same runtime call as "`key in aa`". The runtime calls
these were using were different, but with equivalent definitions.
With `ldc -O3`, the following functions now all compile to the exact same code:
{{{
int[int] y;
void foo(int x) {
if (x in y) {
auto z = x in y;
sink(*z);
}
}
void bar(int x) {
if (x in y) {
sink(y[x]);
}
}
void baz(int x) {
if (auto p = x in y) {
sink(*p);
}
}
}}}
author | Frits van Bommel <fvbommel wxs.nl> |
---|---|
date | Mon, 25 May 2009 12:50:40 +0200 |
parents | 3171f67ad006 |
children | 40bd4a0d4870 |
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#ifndef LDC_CL_HELPERS_H #define LDC_CL_HELPERS_H #include <string> #include "llvm/Support/CommandLine.h" #include "llvm/Support/Compiler.h" struct Array; namespace opts { namespace cl = llvm::cl; /// Helper class for fancier options class FlagParser : public cl::parser<bool> { std::vector<std::pair<std::string, bool> > switches; public: template <class Opt> void initialize(Opt &O) { std::string Name = O.ArgStr; switches.push_back(make_pair("enable-" + Name, true)); switches.push_back(make_pair("disable-" + Name, false)); // Replace <foo> with -enable-<foo> O.ArgStr = switches[0].first.c_str(); } bool parse(cl::Option &O, const char *ArgName, const std::string &ArgValue, bool &Val); void getExtraOptionNames(std::vector<const char*> &Names); }; /// Helper class for options that set multiple flags class MultiSetter { std::vector<bool*> locations; bool invert; MultiSetter(bool); //not implemented, disable auto-conversion public: MultiSetter(bool invert, bool* p, ...) END_WITH_NULL; void operator=(bool val); }; /// Helper class to fill Array with char* when given strings /// (Errors on empty strings) class ArrayAdapter { const char* name; Array** arrp; public: ArrayAdapter(const char* name_, Array*& arr) { name = name_; arrp = &arr; assert(name); assert(arrp); } void push_back(const char* cstr); void push_back(const std::string& str) { push_back(str.c_str()); } }; /// Helper class to allow use of a parser<bool> with BoolOrDefault class BoolOrDefaultAdapter { cl::boolOrDefault value; public: operator cl::boolOrDefault() { return value; } void operator=(cl::boolOrDefault val) { value = val; } void operator=(bool val) { *this = (val ? cl::BOU_TRUE : cl::BOU_FALSE); } }; } #endif