#define LLVM_ADT_ARRAYREF_H
#include "llvm/ADT/None.h"
+#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SmallVector.h"
#include <vector>
/// The number of elements.
size_type Length;
+ /// \brief A dummy "optional" type that is only created by implicit
+ /// conversion from a reference to T.
+ ///
+ /// This type must *only* be used in a function argument or as a copy of
+ /// a function argument, as otherwise it will hold a pointer to a temporary
+ /// past that temporaries' lifetime.
+ struct TRefOrNothing {
+ const T *TPtr;
+
+ TRefOrNothing() : TPtr(nullptr) {}
+ TRefOrNothing(const T &TRef) : TPtr(&TRef) {}
+ };
+
public:
/// @name Constructors
/// @{
return std::vector<T>(Data, Data+Length);
}
+ /// @}
+ /// @{
+ /// @name Convenience methods
+
+ /// @brief Predicate for testing that the array equals the exact sequence of
+ /// arguments.
+ ///
+ /// Will return false if the size is not equal to the exact number of
+ /// arguments given or if the array elements don't equal the argument
+ /// elements in order. Currently supports up to 16 arguments, but can
+ /// easily be extended.
+ bool equals(TRefOrNothing Arg0 = TRefOrNothing(),
+ TRefOrNothing Arg1 = TRefOrNothing(),
+ TRefOrNothing Arg2 = TRefOrNothing(),
+ TRefOrNothing Arg3 = TRefOrNothing(),
+ TRefOrNothing Arg4 = TRefOrNothing(),
+ TRefOrNothing Arg5 = TRefOrNothing(),
+ TRefOrNothing Arg6 = TRefOrNothing(),
+ TRefOrNothing Arg7 = TRefOrNothing(),
+ TRefOrNothing Arg8 = TRefOrNothing(),
+ TRefOrNothing Arg9 = TRefOrNothing(),
+ TRefOrNothing Arg10 = TRefOrNothing(),
+ TRefOrNothing Arg11 = TRefOrNothing(),
+ TRefOrNothing Arg12 = TRefOrNothing(),
+ TRefOrNothing Arg13 = TRefOrNothing(),
+ TRefOrNothing Arg14 = TRefOrNothing(),
+ TRefOrNothing Arg15 = TRefOrNothing()) {
+ TRefOrNothing Args[] = {Arg0, Arg1, Arg2, Arg3, Arg4, Arg5,
+ Arg6, Arg7, Arg8, Arg9, Arg10, Arg11,
+ Arg12, Arg13, Arg14, Arg15};
+ if (size() > array_lengthof(Args))
+ return false;
+
+ for (unsigned i = 0, e = size(); i != e; ++i)
+ if (Args[i].TPtr == nullptr || (*this)[i] != *Args[i].TPtr)
+ return false;
+
+ // Either the size is exactly as many args, or the next arg must be null.
+ return size() == array_lengthof(Args) || Args[size()].TPtr == nullptr;
+ }
+
/// @}
};
EXPECT_TRUE(AR1.drop_back().equals(AR2));
}
+TEST(ArrayRefTest, Equals) {
+ static const int A1[] = {1, 2, 3, 4, 5, 6, 7, 8};
+ ArrayRef<int> AR1(A1);
+ EXPECT_TRUE(AR1.equals(1, 2, 3, 4, 5, 6, 7, 8));
+ EXPECT_FALSE(AR1.equals(8, 1, 2, 4, 5, 6, 6, 7));
+ EXPECT_FALSE(AR1.equals(2, 4, 5, 6, 6, 7, 8, 1));
+ EXPECT_FALSE(AR1.equals(0, 1, 2, 4, 5, 6, 6, 7));
+ EXPECT_FALSE(AR1.equals(1, 2, 42, 4, 5, 6, 7, 8));
+ EXPECT_FALSE(AR1.equals(42, 2, 3, 4, 5, 6, 7, 8));
+ EXPECT_FALSE(AR1.equals(1, 2, 3, 4, 5, 6, 7, 42));
+ EXPECT_FALSE(AR1.equals(1, 2, 3, 4, 5, 6, 7));
+ EXPECT_FALSE(AR1.equals(1, 2, 3, 4, 5, 6, 7, 8, 9));
+
+ ArrayRef<int> AR1a = AR1.drop_back();
+ EXPECT_TRUE(AR1a.equals(1, 2, 3, 4, 5, 6, 7));
+ EXPECT_FALSE(AR1a.equals(1, 2, 3, 4, 5, 6, 7, 8));
+
+ ArrayRef<int> AR1b = AR1a.slice(2, 4);
+ EXPECT_TRUE(AR1b.equals(3, 4, 5, 6));
+ EXPECT_FALSE(AR1b.equals(2, 3, 4, 5, 6));
+ EXPECT_FALSE(AR1b.equals(3, 4, 5, 6, 7));
+}
} // end anonymous namespace