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Help function work

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This commit is contained in:
greg 2019-06-03 22:18:53 +00:00
parent bb39c59db2
commit 8dc0ad2348
2 changed files with 31 additions and 31 deletions
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32
schala-repl/src/repl/directive_actions.rs
View File

@ -1,4 +1,5 @@
use super::{Repl, InterpreterDirectiveOutput};
use crate::repl::command_tree::CommandTree;
use crate::language::{LangMetaRequest, LangMetaResponse, DebugAsk, DebugResponse};
use itertools::Itertools;
use std::fmt::Write as FmtWrite;
@ -24,7 +25,7 @@ impl DirectiveAction {
use DirectiveAction::*;
match self {
Null => None,
Help => Some(repl.print_help_message(arguments)),
Help => help(repl, arguments),
QuitProgram => {
repl.save_before_exit();
::std::process::exit(0)
@ -122,3 +123,32 @@ fn doc(repl: &mut Repl, arguments: &[&str]) -> InterpreterDirectiveOutput {
}
}).unwrap_or(Some(format!(":docs needs an argument")))
}
fn help(repl: &mut Repl, arguments: &[&str]) -> InterpreterDirectiveOutput {
let mut buf = String::new();
let directives = match repl.get_directives() {
CommandTree::Top(children) => children,
_ => panic!("Top-level CommandTree not Top")
};
match arguments {
[] => {
writeln!(buf, "MetaInterpreter options").unwrap();
writeln!(buf, "-----------------------").unwrap();
for directive in directives {
let trailer = " ";
writeln!(buf, "{}{}- {}", directive.get_cmd(), trailer, directive.get_help()).unwrap();
}
let ref lang = repl.get_cur_language_state();
writeln!(buf, "").unwrap();
writeln!(buf, "Language-specific help for {}", lang.get_language_name()).unwrap();
writeln!(buf, "-----------------------").unwrap();
},
_ => {
writeln!(buf, "Command-specific help not available yet").unwrap();
}
};
Some(buf)
}

30
schala-repl/src/repl/mod.rs
View File

@ -1,4 +1,3 @@
use std::fmt::Write as FmtWrite;
use std::sync::Arc;
use std::collections::HashSet;
@ -120,35 +119,6 @@ impl Repl {
directives.perform(self, &arguments)
}
fn print_help_message(&mut self, commands_passed_to_help: &[&str] ) -> String {
let mut buf = String::new();
let directives = match self.get_directives() {
CommandTree::Top(children) => children,
_ => panic!("Top-level CommandTree not Top")
};
match commands_passed_to_help {
[] => {
writeln!(buf, "MetaInterpreter options").unwrap();
writeln!(buf, "-----------------------").unwrap();
for directive in directives {
let trailer = " ";
writeln!(buf, "{}{}- {}", directive.get_cmd(), trailer, directive.get_help()).unwrap();
}
let ref lang = self.get_cur_language_state();
writeln!(buf, "").unwrap();
writeln!(buf, "Language-specific help for {}", lang.get_language_name()).unwrap();
writeln!(buf, "-----------------------").unwrap();
},
_ => {
writeln!(buf, "Command-specific help not available yet").unwrap();
}
};
buf
}
fn get_cur_language_state(&mut self) -> &mut Box<ProgrammingLanguageInterface> {
//TODO this is obviously not complete
&mut self.language_states[0]