74 lines
2.3 KiB
Rust
74 lines
2.3 KiB
Rust
use super::Repl;
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pub type BoxedCommandFunction = Box<(fn(&mut Repl, &[&str]) -> Option<String>)>;
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/// A OldCommandTree is either a `Terminal` or a `NonTerminal`. When command parsing reaches the first
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/// Terminal, it will execute the `BoxedCommandFunction` found there with any remaining arguments
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#[derive(Clone)]
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pub enum OldCommandTree {
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Terminal {
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name: String,
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children: Vec<OldCommandTree>,
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help_msg: Option<String>,
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function: BoxedCommandFunction,
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},
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NonTerminal {
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name: String,
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children: Vec<OldCommandTree>,
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help_msg: Option<String>,
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},
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Top(Vec<OldCommandTree>),
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}
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impl OldCommandTree {
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pub fn nonterm_no_further_tab_completions(s: &str, help: Option<&str>) -> OldCommandTree {
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OldCommandTree::NonTerminal {name: s.to_string(), help_msg: help.map(|x| x.to_string()), children: vec![] }
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}
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pub fn terminal(s: &str, help: Option<&str>, children: Vec<OldCommandTree>, function: BoxedCommandFunction) -> OldCommandTree {
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OldCommandTree::Terminal {name: s.to_string(), help_msg: help.map(|x| x.to_string()), function, children }
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}
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pub fn nonterm(s: &str, help: Option<&str>, children: Vec<OldCommandTree>) -> OldCommandTree {
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OldCommandTree::NonTerminal {
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name: s.to_string(),
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help_msg: help.map(|x| x.to_string()),
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children,
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}
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}
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/*
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pub fn nonterm_with_function(s: &str, help: Option<&str>, children: Vec<OldCommandTree>, func: BoxedCommandFunction) -> OldCommandTree {
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OldCommandTree::NonTerminal {
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name: s.to_string(),
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help_msg: help.map(|x| x.to_string()),
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children,
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function: Some(func),
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}
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}
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*/
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pub fn get_cmd(&self) -> &str {
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match self {
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OldCommandTree::Terminal { name, .. } => name.as_str(),
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OldCommandTree::NonTerminal {name, ..} => name.as_str(),
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OldCommandTree::Top(_) => "",
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}
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}
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pub fn get_help(&self) -> &str {
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match self {
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OldCommandTree::Terminal { help_msg, ..} => help_msg.as_ref().map(|s| s.as_str()).unwrap_or(""),
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OldCommandTree::NonTerminal { help_msg, .. } => help_msg.as_ref().map(|s| s.as_str()).unwrap_or(""),
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OldCommandTree::Top(_) => ""
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}
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}
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pub fn get_children(&self) -> Vec<&str> {
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use OldCommandTree::*;
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match self {
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Terminal { children, .. } |
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NonTerminal { children, .. } |
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Top(children) => children.iter().map(|x| x.get_cmd()).collect()
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}
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}
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}
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