Setting precision for double results in exponencial notation

[ShaiWavesAudio]

Consider the following code that calls text().set() on a double with different precisions:

    pugi::xml_document doc;
    auto doc_node = doc.append_child("Numbers");
    
    double d = 30000.001;

    for (int precision = 0; precision < 7; ++precision)
    {
        auto num_node = doc_node.append_child("number");
        num_node.append_attribute("precision") = precision;

        num_node.text().set(d, precision);  // <<<
    }
    
    doc.save(std::cout, "    ");

The output is:

<?xml version="1.0"?>
<Numbers>
    <number precision="0">3e+04</number>
    <number precision="1">3e+04</number>
    <number precision="2">3e+04</number>
    <number precision="3">3e+04</number>
    <number precision="4">3e+04</number>
    <number precision="5">30000</number>
    <number precision="6">30000</number>
</Numbers>

Note that up to precision 4 the number is printed in scientific notation. Is this intended? Is there a way to force printing of floating point numbers in standard notation?
I'm using pugixml 1.11, Xcode12, clang-1200.0.32.29, llvm 10.0.0.
Thanks,
Shai

[zeux]

pugixml simply uses sprintf with %g specifier to format numbers, so that's the behavior there - it switches between scientific and regular notations based on the estimated output length. If you want consistent non-scientific output you can format the numbers externally using sprintf or stringstream, and then use set with const char* argument instead of double.