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//===----------- VariadicFunctionTest.cpp - VariadicFunction unit tests ---===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "gtest/gtest.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/VariadicFunction.h"
using namespace llvm;
namespace {
// Defines a variadic function StringCat() to join strings.
// StringCat()'s arguments and return value have class types.
std::string StringCatImpl(ArrayRef<const std::string *> Args) {
std::string S;
for (unsigned i = 0, e = Args.size(); i < e; ++i)
S += *Args[i];
return S;
}
const VariadicFunction<std::string, std::string, StringCatImpl> StringCat = {};
TEST(VariadicFunctionTest, WorksForClassTypes) {
EXPECT_EQ("", StringCat());
EXPECT_EQ("a", StringCat("a"));
EXPECT_EQ("abc", StringCat("a", "bc"));
EXPECT_EQ("0123456789abcdefghijklmnopqrstuv",
StringCat("0", "1", "2", "3", "4", "5", "6", "7", "8", "9",
"a", "b", "c", "d", "e", "f", "g", "h", "i", "j",
"k", "l", "m", "n", "o", "p", "q", "r", "s", "t",
"u", "v"));
}
// Defines a variadic function Sum(), whose arguments and return value
// have primitive types.
// The return type of SumImp() is deliberately different from its
// argument type, as we want to test that this works.
long SumImpl(ArrayRef<const int *> Args) {
long Result = 0;
for (unsigned i = 0, e = Args.size(); i < e; ++i)
Result += *Args[i];
return Result;
}
const VariadicFunction<long, int, SumImpl> Sum = {};
TEST(VariadicFunctionTest, WorksForPrimitiveTypes) {
EXPECT_EQ(0, Sum());
EXPECT_EQ(1, Sum(1));
EXPECT_EQ(12, Sum(10, 2));
EXPECT_EQ(1234567, Sum(1000000, 200000, 30000, 4000, 500, 60, 7));
}
// Appends an array of strings to dest and returns the number of
// characters appended.
int StringAppendImpl(std::string *Dest, ArrayRef<const std::string *> Args) {
int Chars = 0;
for (unsigned i = 0, e = Args.size(); i < e; ++i) {
Chars += Args[i]->size();
*Dest += *Args[i];
}
return Chars;
}
const VariadicFunction1<int, std::string *, std::string,
StringAppendImpl> StringAppend = {};
TEST(VariadicFunction1Test, Works) {
std::string S0("hi");
EXPECT_EQ(0, StringAppend(&S0));
EXPECT_EQ("hi", S0);
std::string S1("bin");
EXPECT_EQ(2, StringAppend(&S1, "go"));
EXPECT_EQ("bingo", S1);
std::string S4("Fab4");
EXPECT_EQ(4 + 4 + 6 + 5,
StringAppend(&S4, "John", "Paul", "George", "Ringo"));
EXPECT_EQ("Fab4JohnPaulGeorgeRingo", S4);
}
// Counts how many optional arguments fall in the given range.
// Returns the result in *num_in_range. We make the return type void
// as we want to test that VariadicFunction* can handle it.
void CountInRangeImpl(int *NumInRange, int Low, int High,
ArrayRef<const int *> Args) {
*NumInRange = 0;
for (unsigned i = 0, e = Args.size(); i < e; ++i)
if (Low <= *Args[i] && *Args[i] <= High)
++(*NumInRange);
}
const VariadicFunction3<void, int *, int, int, int,
CountInRangeImpl> CountInRange = {};
TEST(VariadicFunction3Test, Works) {
int N = -1;
CountInRange(&N, -100, 100);
EXPECT_EQ(0, N);
CountInRange(&N, -100, 100, 42);
EXPECT_EQ(1, N);
CountInRange(&N, -100, 100, 1, 999, -200, 42);
EXPECT_EQ(2, N);
}
} // namespace
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