Struct Terminal 

pub struct Terminal;

Collection of interactive terminal prompt utilities.

All methods block on stdin until the user provides valid input. Invalid responses print an inline error and re-prompt rather than returning an error value, so callers always receive a valid result.

Implementations

impl Terminal

pub fn prompt(prompt: &str) -> String

Prints prompt and reads a line from stdin.

A single trailing space is appended to prompt before printing so the cursor lands one character after the prompt text.

pub fn confirm( prompt: &str, default: Option<bool>, show_default: Option<bool>, ) -> bool

Asks a yes/no question and returns the user’s answer as a bool.

Re-prompts on any input that is not y, yes, n, no, or an empty string (which selects the default).

Arguments

• prompt - The question text, without any trailing suffix.
• default - The value returned when the user presses Enter with no input. Defaults to false if None.
• show_default - When true (or None), appends [Y/n] or [y/N] to the prompt to indicate the default visually.

pub fn choice( prompt: &str, choices: &[&str], default: Option<&str>, show_default: Option<bool>, show_choices: Option<bool>, ) -> String

Asks the user to pick one option from a fixed set of choices.

Matching is case-insensitive. Re-prompts until the user enters a recognized choice or presses Enter when a default is set.

Arguments

• prompt - The question text.
• choices - The allowed responses. Must not be empty.
• default - Optional default value returned on empty input. Must be present in choices if provided.
• show_default - When true (or None), marks the default choice with a * in the suffix list.
• show_choices - When true (or None), appends the full choice list to the prompt as [a/b*/c].

Panics

Panics if choices is empty, or if default is set to a value not present in choices.