EC_INTERA..._CALLBACK(3)

💖 EC_INTERACT_SET_CALLBACK — bestie edition 💖

okay so real talk, this is page EC_INTERA..._CALLBACK(3) from the Libecoli Programmer's Manual, and it's literally about making your grammar nodes do something when parsing goes right. no cap. let's get into it 🫶

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✨ NAME ✨

ec_interact_set_callback — set a callback function on a grammar node. that's it, that's the whole vibe 💅

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🌸 SYNOPSIS 🌸

#include <ecoli/interact.h>

int ec_interact_set_callback(
    /*
     * The ec_node on which to add the callback attribute.
     */
    struct ec_node           *node,
    ec_interact_command_cb_t  cb     /* The callback function pointer. */
);

like, you pull in the header, you hand it a node, you hand it a callback, boom. iconic ✨

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🦋 DESCRIPTION 🦋

So what this does: it sets the node attribute EC_INTERACT_CB_ATTR on the node, and inside that attribute lives a pointer to a function — and that function gets invoked on successful parsing. 🎀

fr fr that's it. you're basically telling the node "hey bestie, when someone parses you correctly, run this". main character energy for your grammar tree 👑

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👑 RETURN VALUE 👑

• 0 on success 💚
• -1 on error 😭

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💀 SEE ALSO 💀

the whole friend group, obviously:

• ec_interact_get_completions(3)
• ec_interact_print_helps(3)
• ec_interact_print_error_helps(3)
• ec_interact_print_cols(3)
• ec_interact_set_help(3)
• ec_interact_append_chars(3)
• ec_interact_set_desc(3)
• ec_interact_get_callback(3)
• ec_interact_get_error_helps(3)
• ec_interact_free_completions(3)
• ec_interact_get_helps(3)
• ec_interact_free_helps(3)

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💜 COPYRIGHT 💜

Copyright (C) 2010-2026 Olivier Matz, Robin Jarry.

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and that's the page, bestie!! 🎀 this lil slice of the Libecoli Programmer's Manual is dated 2026-06-11, brought to you by libecoli — go forth and callback responsibly 💅✨