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demo/viewer - use std::optional

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This commit is contained in:
Artem Pavlenko 2024-06-07 14:12:24 +01:00
parent 61cb187dbb
commit 84cd5864e7
1 changed files with 1 additions and 1 deletions
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2
demo/viewer/layer_info_dialog.cpp
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@ -51,7 +51,7 @@ layer_info_dialog::layer_info_dialog(mapnik::layer& lay, QWidget* parent)
int index = 0;
for (pos = ps.begin(); pos != ps.end(); ++pos)
{
boost::optional<std::string> result;
std::optional<std::string> result;
mapnik::util::apply_visitor(mapnik::value_extractor_visitor<std::string>(result), pos->second);
if (result)
{