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Halfway through implementing help text on CommandTree

This commit is contained in:
greg 2018-07-02 03:06:12 -07:00
parent 17a4028185
commit ee55729d5f
1 changed files with 29 additions and 20 deletions
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49
schala-repl/src/lib.rs
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@ -131,26 +131,33 @@ fn run_noninteractive(filename: &str, languages: Vec<Box<ProgrammingLanguageInte
}
enum CommandTree {
Terminal(String),
NonTerminal(String, Vec<CommandTree>),
Terminal(String, Option<String>),
NonTerminal(String, Vec<CommandTree>, Option<String>),
Top(Vec<CommandTree>),
}
impl CommandTree {
fn term(s: &str) -> CommandTree {
CommandTree::Terminal(s.to_string())
fn term(s: &str, help: Option<&str>) -> CommandTree {
CommandTree::Terminal(s.to_string(), help.map(|x| x.to_string()))
}
fn get_cmd(&self) -> String {
match self {
CommandTree::Terminal(s) => s.to_string(),
CommandTree::NonTerminal(s, _) => s.to_string(),
CommandTree::Terminal(s, _) => s.to_string(),
CommandTree::NonTerminal(s, _, _) => s.to_string(),
CommandTree::Top(_) => "".to_string(),
}
}
fn get_help(&self) -> String {
match self {
CommandTree::Terminal(_, h) => h.as_ref().map(|h| h.clone()).unwrap_or(format!("")),
CommandTree::NonTerminal(_, _, h) => h.as_ref().map(|h| h.clone()).unwrap_or(format!("")),
CommandTree::Top(_) => "".to_string(),
}
}
fn get_children(&self) -> Vec<String> {
match self {
CommandTree::Terminal(_) => vec![],
CommandTree::NonTerminal(_, children) => children.iter().map(|x| x.get_cmd()).collect(),
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(),
}
}
@ -204,8 +211,8 @@ impl<T: Terminal> Completer<T> for TabCompleteHandler {
Some(s) => {
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::NonTerminal(_, children, _) => children.iter().find(|c| c.get_cmd() == s),
CommandTree::Terminal(_, _) => None,
});
command_tree = new_ptr;
}
@ -321,18 +328,18 @@ impl Repl {
fn get_directives(&self, passes: &Vec<String>) -> CommandTree {
CommandTree::Top(vec![
CommandTree::term("exit"),
CommandTree::term("quit"),
CommandTree::term("exit", Some("exit the REPL")),
CommandTree::term("quit", Some("exit the REPL")),
CommandTree::NonTerminal(format!("debug"), vec![
CommandTree::term("passes"),
CommandTree::NonTerminal(format!("show"), passes.iter().map(|p| CommandTree::term(p)).collect()),
CommandTree::NonTerminal(format!("hide"), passes.iter().map(|p| CommandTree::term(p)).collect()),
]),
CommandTree::term("passes", None),
CommandTree::NonTerminal(format!("show"), passes.iter().map(|p| CommandTree::term(p, None)).collect(), None),
CommandTree::NonTerminal(format!("hide"), passes.iter().map(|p| CommandTree::term(p, None)).collect(), None),
], None),
CommandTree::NonTerminal(format!("lang"), vec![
CommandTree::term("next"),
CommandTree::term("prev"),
CommandTree::NonTerminal(format!("go"), vec![])//TODO
]),
CommandTree::term("next", None),
CommandTree::term("prev", None),
CommandTree::NonTerminal(format!("go"), vec![], None)//TODO
], None),
])
}
@ -392,10 +399,12 @@ impl Repl {
writeln!(buf, "MetaInterpreter options").unwrap();
writeln!(buf, "-----------------------").unwrap();
/*
writeln!(buf, "exit | quit - exit the REPL").unwrap();
writeln!(buf, "debug [show|hide] <pass_name> - show or hide debug info for a given pass").unwrap();
writeln!(buf, "debug passes - display the names of all passes").unwrap();
writeln!(buf, "lang [prev|next|go <name> |show] - toggle to previous or next language, go to a specific language by name, or show all languages").unwrap();
*/
writeln!(buf, "Language-specific help for {}", lang.get_language_name()).unwrap();
writeln!(buf, "-----------------------").unwrap();
writeln!(buf, "{}", lang.custom_interpreter_directives_help()).unwrap();