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view gen/utils.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 | ec1d9dc1d32a |
children |
line wrap: on
line source
#ifndef __LDC_GEN_UTILS_H__ #define __LDC_GEN_UTILS_H__ #include "root.h" /// Very simple templated iterator for DMD ArrayS. template<class C> struct ArrayIter { Array* array; size_t index; ArrayIter(Array& arr, size_t idx = 0) : array(&arr), index(idx) { } ArrayIter(Array* arr, size_t idx = 0) : array(arr), index(idx) { assert(arr && "null array"); } ArrayIter<C>& operator=(const Array& arr) { array = &arr; index = 0; return *this; } ArrayIter<C>& operator=(const Array* arr) { assert(arr && "null array"); array = arr; index = 0; return *this; } bool done() { return index >= array->dim; } bool more() { return index < array->dim; } C* get() { return static_cast<C*>(array->data[index]); } C* operator->() { return get(); } C* operator*() { return get(); } void next() { ++index; } bool operator==(const ArrayIter<C>& other) { return &array->data[index] == &other.array->data[other.index]; } }; // some aliases typedef ArrayIter<Dsymbol> DsymbolIter; typedef ArrayIter<FuncDeclaration> FuncDeclarationIter; typedef ArrayIter<VarDeclaration> VarDeclarationIter; #endif