library/cpp/getopt/small/formatted_output.cpp


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#include "formatted_output.h" 
 
namespace NLastGetopt { 
 
    TFormattedOutput::IndentGuard::IndentGuard(TFormattedOutput* output) 
        : Output(output) 
    { 
        Output->IndentLevel_ += 2; 
    } 
 
    TFormattedOutput::IndentGuard::~IndentGuard() { 
        Output->IndentLevel_ -= 2; 
    } 
 
    TFormattedOutput::IndentGuard TFormattedOutput::Indent() { 
        return IndentGuard(this); 
    } 
 
    TStringBuilder& TFormattedOutput::Line() { 
        return Lines_.emplace_back(IndentLevel_, TStringBuilder()).second; 
    } 
 
    void TFormattedOutput::Print(IOutputStream& out) { 
        for (auto&[indent, line] : Lines_) { 
            if (indent && !line.empty()) { 
                TTempBuf buf(indent); 
                Fill(buf.Data(), buf.Data() + indent, ' '); 
                out.Write(buf.Data(), indent); 
            } 
            out << line; 
            if (!line.EndsWith('\n')) { 
                out << Endl; 
            } 
        } 
    } 
}