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annotate dep/pugixml/docs/samples/traverse_predicate.cpp @ 187:9613d72b097e

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*: multiple performance improvements like marking `static const` when it makes sense... date: change old stupid heap-based method to a structure which should make copying the thing actually make a copy. also many performance-based changes, like removing the std::tie dependency and forward-declaring nlohmann json *: replace every instance of QString::fromUtf8 to Strings::ToQString. the main difference is that our function will always convert exactly what is in the string, while some other times it would only convert up to the nearest NUL byte
author Paper <mrpapersonic@gmail.com>
date Wed, 06 Dec 2023 13:43:54 -0500
parents d10b6c6b432e
children
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1 #include "pugixml.hpp"
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2
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3 #include <string.h>
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4 #include <iostream>
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5
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6 // tag::decl[]
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7 bool small_timeout(pugi::xml_node node)
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8 {
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9 return node.attribute("Timeout").as_int() < 20;
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10 }
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11
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12 struct allow_remote_predicate
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13 {
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14 bool operator()(pugi::xml_attribute attr) const
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15 {
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16 return strcmp(attr.name(), "AllowRemote") == 0;
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17 }
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18
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19 bool operator()(pugi::xml_node node) const
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20 {
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21 return node.attribute("AllowRemote").as_bool();
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22 }
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23 };
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24 // end::decl[]
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25
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26 int main()
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27 {
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28 pugi::xml_document doc;
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29 if (!doc.load_file("xgconsole.xml")) return -1;
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30
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31 pugi::xml_node tools = doc.child("Profile").child("Tools");
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32
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33 // tag::find[]
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34 // Find child via predicate (looks for direct children only)
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35 std::cout << tools.find_child(allow_remote_predicate()).attribute("Filename").value() << std::endl;
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36
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37 // Find node via predicate (looks for all descendants in depth-first order)
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38 std::cout << doc.find_node(allow_remote_predicate()).attribute("Filename").value() << std::endl;
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39
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40 // Find attribute via predicate
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41 std::cout << tools.last_child().find_attribute(allow_remote_predicate()).value() << std::endl;
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42
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43 // We can use simple functions instead of function objects
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44 std::cout << tools.find_child(small_timeout).attribute("Filename").value() << std::endl;
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45 // end::find[]
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46 }
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47
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48 // vim:et