Help function work
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bb39c59db2
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8dc0ad2348
@ -1,4 +1,5 @@
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use super::{Repl, InterpreterDirectiveOutput};
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use crate::repl::command_tree::CommandTree;
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use crate::language::{LangMetaRequest, LangMetaResponse, DebugAsk, DebugResponse};
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use itertools::Itertools;
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use std::fmt::Write as FmtWrite;
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@ -24,7 +25,7 @@ impl DirectiveAction {
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use DirectiveAction::*;
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match self {
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Null => None,
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Help => Some(repl.print_help_message(arguments)),
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Help => help(repl, arguments),
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QuitProgram => {
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repl.save_before_exit();
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::std::process::exit(0)
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@ -122,3 +123,32 @@ fn doc(repl: &mut Repl, arguments: &[&str]) -> InterpreterDirectiveOutput {
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}
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}).unwrap_or(Some(format!(":docs needs an argument")))
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}
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fn help(repl: &mut Repl, arguments: &[&str]) -> InterpreterDirectiveOutput {
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let mut buf = String::new();
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let directives = match repl.get_directives() {
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CommandTree::Top(children) => children,
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_ => panic!("Top-level CommandTree not Top")
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};
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match arguments {
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[] => {
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writeln!(buf, "MetaInterpreter options").unwrap();
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writeln!(buf, "-----------------------").unwrap();
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for directive in directives {
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let trailer = " ";
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writeln!(buf, "{}{}- {}", directive.get_cmd(), trailer, directive.get_help()).unwrap();
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}
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let ref lang = repl.get_cur_language_state();
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writeln!(buf, "").unwrap();
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writeln!(buf, "Language-specific help for {}", lang.get_language_name()).unwrap();
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writeln!(buf, "-----------------------").unwrap();
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},
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_ => {
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writeln!(buf, "Command-specific help not available yet").unwrap();
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}
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};
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Some(buf)
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}
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@ -1,4 +1,3 @@
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use std::fmt::Write as FmtWrite;
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use std::sync::Arc;
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use std::collections::HashSet;
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@ -120,35 +119,6 @@ impl Repl {
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directives.perform(self, &arguments)
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}
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fn print_help_message(&mut self, commands_passed_to_help: &[&str] ) -> String {
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let mut buf = String::new();
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let directives = match self.get_directives() {
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CommandTree::Top(children) => children,
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_ => panic!("Top-level CommandTree not Top")
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};
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match commands_passed_to_help {
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[] => {
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writeln!(buf, "MetaInterpreter options").unwrap();
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writeln!(buf, "-----------------------").unwrap();
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for directive in directives {
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let trailer = " ";
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writeln!(buf, "{}{}- {}", directive.get_cmd(), trailer, directive.get_help()).unwrap();
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}
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let ref lang = self.get_cur_language_state();
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writeln!(buf, "").unwrap();
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writeln!(buf, "Language-specific help for {}", lang.get_language_name()).unwrap();
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writeln!(buf, "-----------------------").unwrap();
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},
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_ => {
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writeln!(buf, "Command-specific help not available yet").unwrap();
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}
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};
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buf
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}
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fn get_cur_language_state(&mut self) -> &mut Box<ProgrammingLanguageInterface> {
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//TODO this is obviously not complete
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&mut self.language_states[0]
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