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Cleaned up Repl struct

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This commit is contained in:
greg 2017-09-01 02:08:26 -07:00
parent b5a6c5903e
commit 8dc8d15437
5 changed files with 222 additions and 237 deletions
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3
src/language.rs
View File

@ -21,6 +21,7 @@ pub struct EvalOptions {
pub debug_tokens: bool,
pub debug_parse: bool,
pub debug_type: bool,
pub show_llvm_ir: bool,
pub trace_evaluation: bool,
}
@ -77,7 +78,7 @@ impl TraceArtifact {
}
pub trait ProgrammingLanguageInterface {
fn evaluate_in_repl(&mut self, input: &str, eval_options: EvalOptions) -> ReplOutput;
fn evaluate_in_repl(&mut self, input: &str, eval_options: &EvalOptions) -> ReplOutput;
fn get_language_name(&self) -> String;
fn compile(&mut self, _input: &str) -> LLVMCodeString {
LLVMCodeString("".to_string())

2
src/maaru_lang/mod.rs
View File

@ -24,7 +24,7 @@ impl<'a> ProgrammingLanguageInterface for Maaru<'a> {
"Maaru".to_string()
}
fn evaluate_in_repl(&mut self, input: &str, options: EvalOptions) -> ReplOutput {
fn evaluate_in_repl(&mut self, input: &str, options: &EvalOptions) -> ReplOutput {
let mut output = ReplOutput::default();
let tokens = match tokenizer::tokenize(input) {

450
src/main.rs
View File

@ -22,107 +22,74 @@ mod virtual_machine;
use virtual_machine::{run_vm, run_assembler};
fn main() {
let languages: Vec<Box<ProgrammingLanguageInterface>> =
vec![
Box::new(schala_lang::Schala::new()),
Box::new(maaru_lang::Maaru::new()),
Box::new(robo_lang::Robo::new()),
];
let languages: Vec<Box<ProgrammingLanguageInterface>> =
vec![
Box::new(schala_lang::Schala::new()),
Box::new(maaru_lang::Maaru::new()),
Box::new(robo_lang::Robo::new()),
];
let option_matches =
match program_options().parse(std::env::args()) {
Ok(o) => o,
Err(e) => {
println!("{:?}", e);
std::process::exit(1);
}
};
if option_matches.opt_present("list-languages") {
for lang in languages {
println!("{}", lang.get_language_name());
}
let option_matches =
match program_options().parse(std::env::args()) {
Ok(o) => o,
Err(e) => {
println!("{:?}", e);
std::process::exit(1);
}
if option_matches.opt_present("h") {
println!("{}", program_options().usage("Schala metainterpreter"));
std::process::exit(0);
}
if option_matches.opt_present("m") {
let file_name = option_matches.free.get(1);
run_vm(file_name);
std::process::exit(0);
}
if option_matches.opt_present("a") {
let file_name = option_matches.free.get(1);
run_assembler(file_name);
std::process::exit(0);
}
let language_names: Vec<String> = languages.iter().map(|lang| {lang.get_language_name()}).collect();
let initial_index: usize =
option_matches.opt_str("l")
.and_then(|lang| { language_names.iter().position(|x| { *x == lang }) })
.unwrap_or(0);
let mut options = EvalOptions::default();
let show_llvm_ir = option_matches.opt_present("v");
options.trace_evaluation = option_matches.opt_present("t");
let compile = !option_matches.opt_present("i");
match option_matches.free[..] {
[] | [_] => {
let mut repl = Repl::new(languages, initial_index);
repl.show_llvm_ir = show_llvm_ir;
repl.run();
}
[_, ref filename, _..] => {
let mut language = maaru_lang::Maaru::new();
run_noninteractive(filename, &mut language, options, compile);
}
}
};
if option_matches.opt_present("list-languages") {
for lang in languages {
println!("{}", lang.get_language_name());
}
std::process::exit(1);
}
if option_matches.opt_present("h") {
println!("{}", program_options().usage("Schala metainterpreter"));
std::process::exit(0);
}
if option_matches.opt_present("m") {
let file_name = option_matches.free.get(1);
run_vm(file_name);
std::process::exit(0);
}
if option_matches.opt_present("a") {
let file_name = option_matches.free.get(1);
run_assembler(file_name);
std::process::exit(0);
}
let language_names: Vec<String> = languages.iter().map(|lang| {lang.get_language_name()}).collect();
let initial_index: usize =
option_matches.opt_str("l")
.and_then(|lang| { language_names.iter().position(|x| { *x == lang }) })
.unwrap_or(0);
let mut options = EvalOptions::default();
options.trace_evaluation = option_matches.opt_present("t");
let compile = !option_matches.opt_present("i");
match option_matches.free[..] {
[] | [_] => {
let mut repl = Repl::new(languages, initial_index);
repl.options.show_llvm_ir = option_matches.opt_present("v");
repl.run();
}
[_, ref filename, _..] => {
let mut language = maaru_lang::Maaru::new();
run_noninteractive(filename, &mut language, options, compile);
}
};
}
fn program_options() -> getopts::Options {
let mut options = getopts::Options::new();
options.optflag("i",
"interpret",
"Interpret source file instead of compiling");
options.optflag("t",
"trace-evaluation",
"Print out trace of evaluation");
options.optflag("v",
"llvm-in-repl",
"Show LLVM IR in REPL");
options.optflag("",
"list-languages",
"Show a list of all supported languages");
options.optopt("l",
"lang",
"Start up REPL in a language",
"LANGUAGE");
options.optflag("h",
"help",
"Show help text");
options.optflag("m",
"virtual-machine",
"Start up a virtual machine instead of an interpreter");
options.optflag("a",
"assembler",
"Assemble file into bytecode");
options
}
fn run_noninteractive<T: ProgrammingLanguageInterface>(filename: &str, language: &mut T, _options: EvalOptions, compile: bool) {
fn run_noninteractive<T: ProgrammingLanguageInterface>(filename: &str, language: &mut T, options: EvalOptions, compile: bool) {
let mut source_file = File::open(&Path::new(filename)).unwrap();
let mut buffer = String::new();
source_file.read_to_string(&mut buffer).unwrap();
let options = EvalOptions::default();
if compile {
if !language.can_compile() {
panic!("Trying to compile a non-compileable language");
@ -131,162 +98,149 @@ fn run_noninteractive<T: ProgrammingLanguageInterface>(filename: &str, language:
compilation_sequence(llvm_bytecode, filename);
}
} else {
let interpretor_output = language.evaluate_in_repl(&buffer, options);
let interpretor_output = language.evaluate_in_repl(&buffer, &options);
interpretor_output.print_to_screen();
}
}
type LineReader = linefeed::Reader<linefeed::terminal::DefaultTerminal>;
struct Repl {
pub show_tokens: bool,
pub show_parse: bool,
pub show_llvm_ir: bool,
languages: Vec<Box<ProgrammingLanguageInterface>>,
current_language_index: usize,
interpreter_directive_sigil: char,
reader: LineReader,
options: EvalOptions,
languages: Vec<Box<ProgrammingLanguageInterface>>,
current_language_index: usize,
interpreter_directive_sigil: char,
reader: LineReader,
}
impl Repl {
fn new(languages: Vec<Box<ProgrammingLanguageInterface>>, initial_index: usize) -> Repl {
let mut reader: linefeed::Reader<_> = linefeed::Reader::new("Metainterpreter").unwrap();
reader.set_prompt(">> ");
let i = if initial_index < languages.len() { initial_index } else { 0 };
Repl {
show_tokens: false,
show_parse: false,
show_llvm_ir: false,
languages: languages,
current_language_index: i,
interpreter_directive_sigil: '.',
reader: reader,
}
fn new(languages: Vec<Box<ProgrammingLanguageInterface>>, initial_index: usize) -> Repl {
let mut reader: linefeed::Reader<_> = linefeed::Reader::new("Metainterpreter").unwrap();
reader.set_prompt(">> ");
let i = if initial_index < languages.len() { initial_index } else { 0 };
Repl {
options: EvalOptions::default(),
languages: languages,
current_language_index: i,
interpreter_directive_sigil: '.',
reader: reader,
}
fn run(&mut self) {
use linefeed::ReadResult::*;
println!("MetaInterpreter v 0.05");
println!("Using language: {}", self.languages[self.current_language_index].get_language_name());
loop {
match self.reader.read_line() {
Err(e) => {
println!("Terminal read error: {}", e);
},
Ok(Eof) => {
break;
}
Ok(Input(ref input)) => {
self.reader.add_history(input.clone());
if self.handle_interpreter_directive(input) {
continue;
}
let output = self.input_handler(input);
println!("=> {}", output);
}
_ => (),
}
fn run(&mut self) {
use linefeed::ReadResult::*;
println!("MetaInterpreter v 0.05");
println!("Using language: {}", self.languages[self.current_language_index].get_language_name());
loop {
match self.reader.read_line() {
Err(e) => {
println!("Terminal read error: {}", e);
},
Ok(Eof) => {
break;
}
Ok(Input(ref input)) => {
self.reader.add_history(input.clone());
if self.handle_interpreter_directive(input) {
continue;
}
let output = self.input_handler(input);
println!("=> {}", output);
}
_ => (),
}
}
println!("Exiting...");
}
fn input_handler(&mut self, input: &str) -> String {
let ref mut language = self.languages[self.current_language_index];
let interpretor_output = language.evaluate_in_repl(input, &self.options);
interpretor_output.to_string()
}
fn handle_interpreter_directive(&mut self, input: &str) -> bool {
match input.chars().nth(0) {
Some(ch) if ch == self.interpreter_directive_sigil => (),
_ => return false
}
let mut iter = input.chars();
iter.next();
let trimmed_sigil: &str = iter.as_str();
let commands: Vec<&str> = trimmed_sigil
.split_whitespace()
.collect();
let cmd: &str = match commands.get(0).clone() {
None => return true,
Some(s) => s
};
match cmd {
"exit" | "quit" => process::exit(0),
"history" => {
for item in self.reader.history() {
println!("{}", item);
}
},
"lang" => {
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());
} else {
println!("{}", lang.get_language_name());
}
}
},
Some(&"next") => {
self.current_language_index = (self.current_language_index + 1) % self.languages.len();
println!("Switching to {}", self.languages[self.current_language_index].get_language_name());
}
Some(&"prev") | Some(&"previous") => {
self.current_language_index = if self.current_language_index == 0 { self.languages.len() - 1 } else { self.current_language_index - 1 };
println!("Switching to {}", self.languages[self.current_language_index].get_language_name());
},
Some(e) => println!("Bad `lang` argument: {}", e),
None => println!("`lang` - valid arguments `show`, `next`, `prev`|`previous`"),
}
println!("Exiting...");
}
fn input_handler(&mut self, input: &str) -> String {
let ref mut language = self.languages[self.current_language_index];
let options = language::EvalOptions::default();
/*
options.show_tokens = self.show_tokens;
options.show_parse = self.show_parse;
options.show_llvm_ir = self.show_llvm_ir;
*/
let interpretor_output = language.evaluate_in_repl(input, options);
interpretor_output.to_string()
}
fn handle_interpreter_directive(&mut self, input: &str) -> bool {
match input.chars().nth(0) {
Some(ch) if ch == self.interpreter_directive_sigil => (),
_ => return false
}
let mut iter = input.chars();
iter.next();
let trimmed_sigil: &str = iter.as_str();
let commands: Vec<&str> = trimmed_sigil
.split_whitespace()
.collect();
let cmd: &str = match commands.get(0).clone() {
None => return true,
Some(s) => s
},
"set" => {
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 cmd {
"exit" | "quit" => process::exit(0),
"history" => {
for item in self.reader.history() {
println!("{}", item);
}
},
"lang" => {
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());
} else {
println!("{}", lang.get_language_name());
}
}
},
Some(&"next") => {
self.current_language_index = (self.current_language_index + 1) % self.languages.len();
println!("Switching to {}", self.languages[self.current_language_index].get_language_name());
}
Some(&"prev") | Some(&"previous") => {
self.current_language_index = if self.current_language_index == 0 { self.languages.len() - 1 } else { self.current_language_index - 1 };
println!("Switching to {}", self.languages[self.current_language_index].get_language_name());
},
Some(e) => println!("Bad `lang` argument: {}", e),
None => println!("`lang` - valid arguments `show`, `next`, `prev`|`previous`"),
}
},
"set" => {
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.get(2) {
Some(&"tokens") => self.show_tokens = show,
Some(&"parse") => self.show_parse = show,
Some(&"eval") => {
//let ref mut language = self.languages[self.current_language_index];
//language.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)
match commands.get(2) {
Some(&"tokens") => self.options.debug_tokens = show,
Some(&"parse") => self.options.debug_parse = show,
Some(&"eval") => {
//let ref mut language = self.languages[self.current_language_index];
//language.set_option("trace_evaluation", show);
},
Some(&"llvm") => self.options.show_llvm_ir = show,
Some(e) => {
println!("Bad `show`/`hide` argument: {}", e);
return true;
}
None => {
println!("`show`/`hide` requires an argument");
return true;
}
}
return true;
},
e => println!("Unknown command: {}", e)
}
return true;
}
}
pub fn compilation_sequence(llvm_code: LLVMCodeString, sourcefile: &str) {
@ -335,3 +289,33 @@ pub fn compilation_sequence(llvm_code: LLVMCodeString, sourcefile: &str) {
}
}
fn program_options() -> getopts::Options {
let mut options = getopts::Options::new();
options.optflag("i",
"interpret",
"Interpret source file instead of compiling");
options.optflag("t",
"trace-evaluation",
"Print out trace of evaluation");
options.optflag("v",
"llvm-in-repl",
"Show LLVM IR in REPL");
options.optflag("",
"list-languages",
"Show a list of all supported languages");
options.optopt("l",
"lang",
"Start up REPL in a language",
"LANGUAGE");
options.optflag("h",
"help",
"Show help text");
options.optflag("m",
"virtual-machine",
"Start up a virtual machine instead of an interpreter");
options.optflag("a",
"assembler",
"Assemble file into bytecode");
options
}

2
src/robo_lang/mod.rs
View File

@ -137,7 +137,7 @@ impl ProgrammingLanguageInterface for Robo {
"Robo".to_string()
}
fn evaluate_in_repl(&mut self, input: &str, _eval_options: EvalOptions) -> ReplOutput {
fn evaluate_in_repl(&mut self, input: &str, _eval_options: &EvalOptions) -> ReplOutput {
let mut output = ReplOutput::default();
let tokens = match tokenize(input) {
Ok(tokens) => tokens,

2
src/schala_lang/mod.rs
View File

@ -16,7 +16,7 @@ impl ProgrammingLanguageInterface for Schala {
"Schala".to_string()
}
fn evaluate_in_repl(&mut self, input: &str, options: EvalOptions) -> ReplOutput {
fn evaluate_in_repl(&mut self, input: &str, options: &EvalOptions) -> ReplOutput {
let mut output = ReplOutput::default();
let tokens = match parsing::tokenize(input) {
Ok(tokens) => {