Struct Stack 

pub struct Stack(/* private fields */);

Represent the stack file on disk.

Implementations

impl Stack

pub fn new(file: &str) -> Result<Self, PathError>

Creates a Stack object wrapping the supplied file.

Errors

• Return PathError::FilenameMissing if the file has no filename.
• Return PathError::InvalidPath if the path part of file is not a valid path.
• Return PathError::InvalidStackPath if stack path is invalid.

pub fn open(&self) -> Result<File, PathError>

Open the stack file for reading, return a File.

Errors

• Return PathError::FileAccess if unable to open the file.

pub fn exists(&self) -> bool

Return true if the timelog file exists

pub fn clear(&self) -> Result<(), PathError>

Truncates the stack file, removing all items from the stack.

Errors

• Return PathError::FileAccess if the stack file is not accessible.

pub fn push(&self, task: &str) -> Result<(), PathError>

Adds a new event to the stack file.

Errors

• Return PathError::FileAccess if the stack file cannot be opened or created.
• Return PathError::FileWrite if the stack file cannot be written.

pub fn pop(&self) -> Option<String>

Remove the most recent task from the stack file and return the task string.

pub fn drop(&self, arg: u32) -> Result<()>

Remove one or more tasks from the stack file.

If arg is 0, remove one item. If arg is a positive number, remove that many items from the stack.

Errors

• Return Error::StackPop if attempts to pop more items than exist in the stack file.

pub fn keep(&self, num: u32) -> Result<()>

Remove everything except the top num tasks from the stack.

Errors

• Return PathError::FileAccess if the stack file cannot be opened or created.
• Return PathError::FileWrite if the stack file cannot be written.
• Return PathError::RenameFailure if the stack file cannot be renamed.

pub fn process_down_stack<F>(&self, func: F) -> Result<()>

where F: FnMut(usize, &str),

Process the stack top-down, passing the index and lines to the supplied function.

Errors

• Return PathError::FileAccess if the stack file cannot be opened or created.
• Return PathError::FileWrite if the stack file cannot be written.
• Return PathError::RenameFailure if the stack file cannot be renamed.

pub fn list(&self) -> String

Format the stack as a String.

The stack will be formatted such that the most recent item is listed first.

pub fn top(&self) -> Result<String>

Return the top of the stack as a String.

Errors

• Return PathError::FileAccess if the stack file cannot be opened or created.
• Return PathError::FileWrite if the stack file cannot be written.
• Return PathError::RenameFailure if the stack file cannot be renamed.

Trait Implementations

impl Debug for Stack

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.