Method is_double

src/fl/stl/json.h:244–244

    bool is_int() const FL_NOEXCEPT { return mValue && (mValue->is_int() || mValue->is_bool()); }
    bool is_float() const FL_NOEXCEPT { return mValue && mValue->is_float(); }
    bool is_double() const FL_NOEXCEPT { return mValue && mValue->is_double(); }
    // is_number() returns true if the value is any numeric type (int or float)
    bool is_number() const FL_NOEXCEPT { return mValue && mValue->is_number(); }
    bool is_string() const FL_NOEXCEPT { return mValue && mValue->is_string(); }