[−][src]Trait compact_path_tree::PathVisitor

pub trait PathVisitor {
    fn filter(&mut self, _entry: &DirEntry) -> Result<bool> { ... }
    fn visit(&mut self, _entry: &DirEntry) -> Result<()> { ... }
    fn handle_error(
        &mut self, 
        error: Error, 
        directory: &Path, 
        entry: Option<&DirEntry>
    ) -> Option<Error> { ... }
}

A visitor that can determine which paths should be included and how errors are handled, or just view paths as the tree is constructed.

Provided methods

`fn filter(&mut self, _entry: &DirEntry) -> Result<bool>`

Determine whether the given entry should be included in the tree.

When Ok(true) is returned, the entry is included. When Ok(false) is returned, the entry is omitted, including any children for directories. When Err(..) is returned, the item is omitted and PathVisitor::handle_error is used to determine whether the operation should fail or not.

`fn visit(&mut self, _entry: &DirEntry) -> Result<()>`

A general-purpose function for any logic involving included entries. This is called after filter and only for entries for which filter returned Ok(true).

`fn handle_error( &mut self, error: Error, directory: &Path, entry: Option<&DirEntry> ) -> Option<Error>`

Handle a given IO error, determining whether it should be fatal or not.

Some(..) indicates that the error is fatal and should stop traversal, and None indicates that the error is non-fatal and should be ignored. When an error is ignored, the

This function will be called for any error that occurs, including errors from PathVisitor::filter or PathVisitor::visit.

The default implementation logs PermissionDenied errors to stderr but doesn't stop.

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Implementors