Abdüssamet ERSOYLU
cad569de25
Add on_complete event handler to trigger actions after argument parsing completes Move grep logic to separate function and register it as a completion callback Update argument getters and help text generation to be const methods
32 lines
1.6 KiB
Markdown
32 lines
1.6 KiB
Markdown
# TODO 1: After Parse callback
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Currently interdependent arguments are a problem. In the current version we are handling them as closures.
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We create two stateful actions who are taking the state from the close over of the lambda. This is a little hacky/ugly.
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To fix this we could have a callback/on_parse_done event. An example usage could be;
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```cpp
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parser.after_parse([&parser]() {
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auto grep_val = parser.get_optional<std::string>("grep");
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auto file_val = parser.get_optional<std::string>("file");
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if (grep_val && file_val) {
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grep(*grep_val, *file_val);
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} else if (grep_val) {
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std::cerr << "grep requires file\n";
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}
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});
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```
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After handle_parse(...) ends, we can call the on_parse_done callbacks. But this requires two things;
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1. Storable arguments. Those would be not actions, but stored values. So you could get them later on in the callback or somewhere else.
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2. The on_parse_done callbacks should be called after all actions are invoked. But we should make this a toggle, so the callback only gets executed if the user explicitly wants it to be called. By default we would enable it.
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## Self reminder, implement this feature. It'd be helpful.
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### Update: 6 Oct. 2025
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We now have storable arguments. Now we need to implement the on_parse_done callbacks, to achieve this feature.
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Also the run after complete events are implemented.
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# TODO 2: Positional arguments
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Positional arguments are arguments that are not prefixed with a dash. They are usually the arguments that are passed to the program.
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For example, in the command `grep "pattern" file.txt`, "pattern" and "file.txt" are positional arguments.
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