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Fix bugs in interpreter argument parsing

This commit is contained in:
greg 2017-02-02 02:12:28 -08:00
parent ecf60198fa
commit 387ec25cda
1 changed files with 24 additions and 15 deletions
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39
src/main.rs
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@ -192,8 +192,8 @@ impl Repl {
}
},
"lang" => {
match commands[1] {
"show" => {
match commands.get(1) {
Some(&"show") => {
for (i, lang) in self.languages.iter().enumerate() {
if i == self.current_language_index {
println!("* {}", lang.get_language_name());
@ -202,33 +202,42 @@ impl Repl {
}
}
},
"next" => {
Some(&"next") => {
self.current_language_index = (self.current_language_index + 1) % self.languages.len();
}
"prev" | "previous" => {
Some(&"prev") | Some(&"previous") => {
self.current_language_index = if self.current_language_index == 0 { self.languages.len() - 1 } else { self.current_language_index - 1 }
},
e => println!("Bad `lang` argument: {}", e),
Some(e) => println!("Bad `lang` argument: {}", e),
None => println!("`lang` - valid arguments `show`, `next`, `prev`|`previous`"),
}
},
"set" => {
let show = match commands[1] {
"show" => true,
"hide" => false,
e => {
let show = match commands.get(1) {
Some(&"show") => true,
Some(&"hide") => false,
Some(e) => {
println!("Bad `set` argument: {}", e);
return true;
}
None => {
println!("`set` - valid arguments `show {{option}}`, `hide {{option}}`");
return true;
}
};
match commands[2] {
"tokens" => self.show_tokens = show,
"parse" => self.show_parse = show,
"eval" => { /*self.evaluator.set_option("trace_evaluation", show);*/ },
"llvm" => self.show_llvm_ir = show,
e => {
match commands.get(2) {
Some(&"tokens") => self.show_tokens = show,
Some(&"parse") => self.show_parse = show,
Some(&"eval") => { /*self.evaluator.set_option("trace_evaluation", show);*/ },
Some(&"llvm") => self.show_llvm_ir = show,
Some(e) => {
println!("Bad `show`/`hide` argument: {}", e);
return true;
}
None => {
println!("`show`/`hide` requires an argument");
return true;
}
}
},
e => println!("Unknown command: {}", e)