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path: root/src/reports/source_hierarchy.rs
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use crate::*;


pub struct SourceHierarchy<'a> {
    pub resolver: &'a Resolver,
}

impl<'a> SourceHierarchy<'a> {
    pub fn report(&self) {
        eprintln!(".");
        let len = self.resolver.root_unit_ids.len();
        for (i, id) in self.resolver.root_unit_ids.iter().enumerate() {
            let end = i + 1 == len;
            self.report_leaf(*id, Vec::new(), end);
        }
    }

    fn report_leaf(&self, id: usize, mut levels: Vec<bool>, end: bool) {
        // A level entry is true if all entries in that level have been printed.
        for level in &levels {
            match level {
                false => eprint!("│   "),
                true  => eprint!("    "),
            }
        }
        // The end value is true if all siblings of this entry have been printed.
        match end {
                false => eprint!("├── "),
                true  => eprint!("└── "),
        }
        let unit = &self.resolver.source_units[id];
        let path_str = &unit.source_unit.main.path.as_os_str().to_string_lossy();
        if let Some(name_str) = unit.source_unit.name() {
            eprint!("{name_str}{BLUE}");
            if unit.source_unit.head.is_some() { eprint!(" +head") }
            if unit.source_unit.tail.is_some() { eprint!(" +tail") }
            let mut unresolved = 0;
            for symbol in &self.resolver.unresolved {
                if symbol.source_id == id { unresolved += 1; }
            }
            if unresolved > 0 { eprint!("{RED} ({unresolved})"); }
            eprintln!("{NORMAL} {DIM}({path_str}){NORMAL}");
        } else {
            eprintln!("{path_str}");
        }
        levels.push(end);
        let len = unit.child_ids.len();
        for (i, id) in unit.child_ids.iter().enumerate() {
            let end = i + 1 == len;
            self.report_leaf(*id, levels.clone(), end);
        }
    }
}