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Start making CommandTree abstraction include implementation

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This commit is contained in:
greg 2018-10-02 00:46:23 -07:00
parent 1c11fec803
commit 819c422cee
1 changed files with 12 additions and 7 deletions
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19
schala-repl/src/repl.rs
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@ -1,6 +1,7 @@
use std::fmt::Write as FmtWrite;
use std::io::{Read, Write};
use std::fs::File;
use std::sync::Arc;
use colored::*;
use itertools::Itertools;
@ -76,7 +77,7 @@ impl Repl {
let language_name = self.get_cur_language().get_language_name();
let directives = self.get_directives();
let tab_complete_handler = TabCompleteHandler::new(self.interpreter_directive_sigil, directives);
self.line_reader.set_completer(::std::sync::Arc::new(tab_complete_handler));
self.line_reader.set_completer(Arc::new(tab_complete_handler));
let prompt_str = format!("{} >> ", language_name);
self.line_reader.set_prompt(&prompt_str).unwrap();
@ -329,7 +330,7 @@ impl<T: Terminal> Completer<T> for TabCompleteHandler {
let new_ptr: Option<&CommandTree> = command_tree.and_then(|cm| match cm {
CommandTree::Top(children) => children.iter().find(|c| c.get_cmd() == s),
CommandTree::NonTerminal(_, children, _) => children.iter().find(|c| c.get_cmd() == s),
CommandTree::Terminal(_, _) => None,
CommandTree::Terminal { .. } => None,
});
command_tree = new_ptr;
}
@ -344,32 +345,36 @@ impl<T: Terminal> Completer<T> for TabCompleteHandler {
#[derive(Clone)]
enum CommandTree {
Terminal(String, Option<String>),
Terminal {
name: String,
help_msg: Option<String>,
function: Option<Box<(fn() -> Option<String>)>>,
},
NonTerminal(String, Vec<CommandTree>, Option<String>),
Top(Vec<CommandTree>),
}
impl CommandTree {
fn term(s: &str, help: Option<&str>) -> CommandTree {
CommandTree::Terminal(s.to_string(), help.map(|x| x.to_string()))
CommandTree::Terminal {name: s.to_string(), help_msg: help.map(|x| x.to_string()), function: None }
}
fn get_cmd(&self) -> &str {
match self {
CommandTree::Terminal(s, _) => s.as_str(),
CommandTree::Terminal { name, .. } => name.as_str(),
CommandTree::NonTerminal(s, _, _) => s.as_str(),
CommandTree::Top(_) => "",
}
}
fn get_help(&self) -> &str {
match self {
CommandTree::Terminal(_, h) => h.as_ref().map(|s| s.as_str()).unwrap_or(""),
CommandTree::Terminal { help_msg, ..} => help_msg.as_ref().map(|s| s.as_str()).unwrap_or(""),
CommandTree::NonTerminal(_, _, h) => h.as_ref().map(|s| s.as_str()).unwrap_or(""),
CommandTree::Top(_) => ""
}
}
fn get_children(&self) -> Vec<&str> {
match self {
CommandTree::Terminal(_, _) => vec![],
CommandTree::Terminal { .. } => vec![],
CommandTree::NonTerminal(_, children, _) => children.iter().map(|x| x.get_cmd()).collect(),
CommandTree::Top(children) => children.iter().map(|x| x.get_cmd()).collect(),
}