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Can now switch between languages in the interpreter

This commit is contained in:
greg 2017-02-02 02:00:26 -08:00
parent f83cece2b4
commit ecf60198fa
1 changed files with 23 additions and 1 deletions
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24
src/main.rs
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@ -115,6 +115,7 @@ struct Repl {
show_parse: bool,
show_llvm_ir: bool,
languages: Vec<Box<LanguageInterface>>,
current_language_index: usize,
interpreter_directive_sigil: char,
reader: LineReader,
}
@ -129,6 +130,7 @@ impl Repl {
show_parse: false,
show_llvm_ir: false,
languages: languages,
current_language_index: 0,
interpreter_directive_sigil: '.',
reader: reader,
}
@ -159,7 +161,7 @@ impl Repl {
}
fn input_handler(&mut self, input: &str) -> String {
let ref mut language = self.languages[0];
let ref mut language = self.languages[self.current_language_index];
language.evaluate_in_repl(input, language::LanguageInterfaceOptions::default())
}
@ -189,6 +191,26 @@ impl Repl {
println!("{}", item);
}
},
"lang" => {
match commands[1] {
"show" => {
for (i, lang) in self.languages.iter().enumerate() {
if i == self.current_language_index {
println!("* {}", lang.get_language_name());
} else {
println!("{}", lang.get_language_name());
}
}
},
"next" => {
self.current_language_index = (self.current_language_index + 1) % self.languages.len();
}
"prev" | "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),
}
},
"set" => {
let show = match commands[1] {
"show" => true,