本文整理汇总了C++中Optional::IsNull方法的典型用法代码示例。如果您正苦于以下问题：C++ Optional::IsNull方法的具体用法？C++ Optional::IsNull怎么用？C++ Optional::IsNull使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类Optional的用法示例。
在下文中一共展示了Optional::IsNull方法的7个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: TestDict
static void TestDict(DictPtr dict) {
Optional<DictEntry> entry;
entry = dict->MatchPrefix("BYVoid");
AssertTrue(!entry.IsNull());
AssertEquals("BYVoid", entry.Get().key);
AssertEquals("byv", entry.Get().GetDefault());
entry = dict->MatchPrefix("BYVoid123");
AssertTrue(!entry.IsNull());
AssertEquals("BYVoid", entry.Get().key);
AssertEquals("byv", entry.Get().GetDefault());
entry = dict->MatchPrefix(utf8("積羽沉舟"));
AssertTrue(!entry.IsNull());
AssertEquals(utf8("積羽沉舟"), entry.Get().key);
AssertEquals(utf8("羣輕折軸"), entry.Get().GetDefault());
entry = dict->MatchPrefix("Unknown");
AssertTrue(entry.IsNull());
const vector<DictEntry> matches = dict->MatchAllPrefixes(utf8("清華大學計算機系"));
AssertEquals(3, matches.size());
AssertEquals(utf8("清華大學"), matches.at(0).key);
AssertEquals("TsinghuaUniversity", matches.at(0).GetDefault());
AssertEquals(utf8("清華"), matches.at(1).key);
AssertEquals("Tsinghua", matches.at(1).GetDefault());
AssertEquals(utf8("清"), matches.at(2).key);
AssertEquals("Tsing", matches.at(2).GetDefault());
}示例2: clearBuffer
vector<string> MaxMatchSegmentation::Segment(const string& text) {
vector<string> segments;
vector<string> buffer;
auto clearBuffer = [&segments, &buffer]() {
if (buffer.size() > 0) {
segments.push_back(UTF8Util::Join(buffer));
buffer.clear();
}
};
for (const char* pstr = text.c_str(); *pstr != '\0';) {
Optional<DictEntry> matched = dict->MatchPrefix(pstr);
size_t matchedLength;
if (matched.IsNull()) {
matchedLength = UTF8Util::NextCharLength(pstr);
buffer.push_back(UTF8Util::FromSubstr(pstr, matchedLength));
} else {
clearBuffer();
matchedLength = matched.Get().key.length();
segments.push_back(matched.Get().key);
}
pstr += matchedLength;
}
clearBuffer();
return segments;
}示例3: main
int main(int argc, const char* argv[]) {
try {
TCLAP::CmdLine cmd("Open Chinese Convert (OpenCC) Command Line Tool",
' ',
VERSION);
CmdLineOutput cmdLineOutput;
cmd.setOutput(&cmdLineOutput);
TCLAP::ValueArg<string> configArg("c", "config",
"Configuration file",
false /* required */,
"s2t.json" /* default */,
"file" /* type */,
cmd);
TCLAP::ValueArg<string> outputArg("o", "output",
"Write converted text to",
false /* required */,
"" /* default */,
"file" /* type */,
cmd);
TCLAP::ValueArg<string> inputArg("i", "input",
"Read original text from",
false /* required */,
"" /* default */,
"file" /* type */,
cmd);
TCLAP::ValueArg<bool> noFlushArg("", "noflush",
"Disable flush for every line",
false /* required */,
false /* default */,
"bool" /* type */,
cmd);
cmd.parse(argc, argv);
configFileName = configArg.getValue();
noFlush = noFlushArg.getValue();
if (inputArg.isSet()) {
inputFileName = Optional<string>(inputArg.getValue());
}
if (outputArg.isSet()) {
outputFileName = Optional<string>(outputArg.getValue());
noFlush = true;
}
converter = config.NewFromFile(configFileName);
bool lineByLine = inputFileName.IsNull();
if (lineByLine) {
ConvertLineByLine();
} else {
Convert();
}
} catch (TCLAP::ArgException& e) {
std::cerr << "error: " << e.error()
<< " for arg " << e.argId() << std::endl;
} catch (Exception& e) {
std::cerr << e.what() << std::endl;
}
return 0;
}示例4: BindNull
void SqlConnection::DataCommand::BindDouble(
SqlConnection::ArgumentIndex position,
const Optional<double> &value)
{
if (value.IsNull())
BindNull(position);
else
BindDouble(position, *value);
}示例5: GetOutputStream
FILE* GetOutputStream() {
if (outputFileName.IsNull()) {
return stdout;
} else {
FILE* fp = fopen(outputFileName.Get().c_str(), "w");
if (!fp) {
throw FileNotWritable(outputFileName.Get());
}
return fp;
}
}示例6: Convert
string Conversion::Convert(const string& phrase) const {
std::ostringstream buffer;
for (const char* pstr = phrase.c_str(); *pstr != '\0';) {
Optional<const DictEntry*> matched = dict->MatchPrefix(pstr);
size_t matchedLength;
if (matched.IsNull()) {
matchedLength = UTF8Util::NextCharLength(pstr);
buffer << UTF8Util::FromSubstr(pstr, matchedLength);
} else {
matchedLength = matched.Get()->KeyLength();
buffer << matched.Get()->GetDefault();
}
pstr += matchedLength;
}
return buffer.str();
}示例7: Segment
DictEntryPtrVectorPtr MaxMatchSegmentation::Segment(const string& text) {
DictEntryPtrVectorPtr segments(new DictEntryPtrVector);
const char* pstr = text.c_str();
while (*pstr != '\0') {
Optional<DictEntryPtr> matched = dict->MatchPrefix(pstr);
size_t matchedLength;
if (matched.IsNull()) {
matchedLength = UTF8Util::NextCharLength(pstr);
segments->push_back(DictEntryPtr(new DictEntry(UTF8Util::FromSubstr(pstr, matchedLength))));
} else {
matchedLength = matched.Get()->key.length();
segments->push_back(DictEntryPtr(matched.Get()));
}
pstr += matchedLength;
}
return segments;
}