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Add GetWithDefault() overloads

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This commit is contained in:
miloyip
2015-05-02 21:52:49 +08:00
parent 2ddbd09031
commit 32b45f6e6d
2 changed files with 58 additions and 0 deletions
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22
include/rapidjson/pointer.h
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@@ -248,6 +248,28 @@ public:
return v;
}
ValueType& GetWithDefault(ValueType& root, GenericStringRef<Ch> defaultValue, typename ValueType::AllocatorType& allocator) const {
ValueType v(defaultValue);
return GetWithDefault(root, v, allocator);
}
ValueType& GetWithDefault(ValueType& root, const Ch* defaultValue, typename ValueType::AllocatorType& allocator) const {
bool alreadyExist;
Value& v = Create(root, allocator, &alreadyExist);
if (!alreadyExist) {
Value clone(defaultValue, allocator); // This has overhead, so do it inside if.
v = clone;
}
return v;
}
template <typename T>
RAPIDJSON_DISABLEIF_RETURN((internal::OrExpr<internal::IsPointer<T>, internal::IsGenericValue<T> >), (ValueType&))
GetWithDefault(ValueType& root, T defaultValue, typename ValueType::AllocatorType& allocator) const {
ValueType v(defaultValue);
return GetWithDefault(root, v, allocator);
}
// Move semantics, create parents if non-exist
ValueType& Set(ValueType& root, ValueType& value, typename ValueType::AllocatorType& allocator) const {
return Create(root, allocator) = value;

36
test/unittest/pointertest.cpp
View File

@@ -313,6 +313,7 @@ TEST(Pointer, GetWithDefault) {
Document d;
d.Parse(kJson);
// Value version
Document::AllocatorType& a = d.GetAllocator();
const Value v("qux");
EXPECT_TRUE(Value("bar") == Pointer("/foo/0").GetWithDefault(d, v, a));
@@ -320,6 +321,41 @@ TEST(Pointer, GetWithDefault) {
EXPECT_TRUE(Value("qux") == Pointer("/foo/2").GetWithDefault(d, v, a));
EXPECT_TRUE(Value("last") == Pointer("/foo/-").GetWithDefault(d, Value("last").Move(), a));
EXPECT_STREQ("last", d["foo"][3].GetString());
EXPECT_TRUE(Pointer("/foo/null").GetWithDefault(d, Value().Move(), a).IsNull());
EXPECT_TRUE(Pointer("/foo/null").GetWithDefault(d, "x", a).IsNull());
// Generic version
EXPECT_EQ(-1, Pointer("/foo/int").GetWithDefault(d, -1, a).GetInt());
EXPECT_EQ(-1, Pointer("/foo/int").GetWithDefault(d, -2, a).GetInt());
EXPECT_EQ(0x87654321, Pointer("/foo/uint").GetWithDefault(d, 0x87654321, a).GetUint());
EXPECT_EQ(0x87654321, Pointer("/foo/uint").GetWithDefault(d, 0x12345678, a).GetUint());
const int64_t i64 = static_cast<int64_t>(RAPIDJSON_UINT64_C2(0x80000000, 0));
EXPECT_EQ(i64, Pointer("/foo/int64").GetWithDefault(d, i64, a).GetInt64());
EXPECT_EQ(i64, Pointer("/foo/int64").GetWithDefault(d, i64 + 1, a).GetInt64());
const uint64_t u64 = RAPIDJSON_UINT64_C2(0xFFFFFFFFF, 0xFFFFFFFFF);
EXPECT_EQ(u64, Pointer("/foo/uint64").GetWithDefault(d, u64, a).GetUint64());
EXPECT_EQ(u64, Pointer("/foo/uint64").GetWithDefault(d, u64 - 1, a).GetUint64());
EXPECT_TRUE(Pointer("/foo/true").GetWithDefault(d, true, a).IsTrue());
EXPECT_TRUE(Pointer("/foo/true").GetWithDefault(d, false, a).IsTrue());
EXPECT_TRUE(Pointer("/foo/false").GetWithDefault(d, false, a).IsFalse());
EXPECT_TRUE(Pointer("/foo/false").GetWithDefault(d, true, a).IsFalse());
// StringRef version
EXPECT_STREQ("Hello", Pointer("/foo/hello").GetWithDefault(d, "Hello", a).GetString());
// Copy string version
{
char buffer[256];
strcpy(buffer, "World");
EXPECT_STREQ("World", Pointer("/foo/world").GetWithDefault(d, buffer, a).GetString());
memset(buffer, 0, sizeof(buffer));
}
EXPECT_STREQ("World", GetValueByPointer(d, "/foo/world")->GetString());
}
TEST(Pointer, Set) {