Trait erg_common::traits::Runnable
source · pub trait Runnable: Sized + Default {
type Err: ErrorDisplay;
type Errs: MultiErrorDisplay<Self::Err>;
const NAME: &'static str;
Show 16 methods
fn new(cfg: ErgConfig) -> Self;
fn cfg(&self) -> &ErgConfig;
fn cfg_mut(&mut self) -> &mut ErgConfig;
fn finish(&mut self);
fn initialize(&mut self);
fn clear(&mut self);
fn eval(&mut self, src: String) -> Result<String, Self::Errs>;
fn exec(&mut self) -> Result<i32, Self::Errs>;
fn input(&self) -> &Input { ... }
fn set_input(&mut self, input: Input) { ... }
fn start_message(&self) -> String { ... }
fn ps1(&self) -> String { ... }
fn ps2(&self) -> String { ... }
fn quit(&mut self, code: i32) -> ! { ... }
fn quit_successfully(&mut self, output: BufWriter<StdoutLock<'_>>) -> ! { ... }
fn run(cfg: ErgConfig) { ... }
}Expand description
This trait implements REPL (Read-Eval-Print-Loop) automatically
The exec method is called for file input, etc.
Required Associated Types§
type Err: ErrorDisplay
type Errs: MultiErrorDisplay<Self::Err>
Required Associated Constants§
Required Methods§
fn new(cfg: ErgConfig) -> Self
fn cfg(&self) -> &ErgConfig
fn cfg_mut(&mut self) -> &mut ErgConfig
fn finish(&mut self)
sourcefn initialize(&mut self)
fn initialize(&mut self)
Erase all but immutable information.
fn eval(&mut self, src: String) -> Result<String, Self::Errs>
fn exec(&mut self) -> Result<i32, Self::Errs>
Provided Methods§
sourcefn input(&self) -> &Input
fn input(&self) -> &Input
Examples found in repository?
traits.rs (line 434)
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fn run(cfg: ErgConfig) {
let quiet_repl = cfg.quiet_repl;
let mut instance = Self::new(cfg);
let res = match instance.input() {
Input::File(_) | Input::Pipe(_) | Input::Str(_) => instance.exec(),
Input::REPL => {
let output = stdout();
let mut output = BufWriter::new(output.lock());
if !quiet_repl {
log!(info_f output, "The REPL has started.\n");
output
.write_all(instance.start_message().as_bytes())
.unwrap();
}
output.write_all(instance.ps1().as_bytes()).unwrap();
output.flush().unwrap();
let mut in_block = false;
let mut lines = String::new();
loop {
let line = chomp(&instance.input().read());
match &line[..] {
":quit" | ":exit" => {
instance.quit_successfully(output);
}
":clear" => {
output.write_all("\x1b[2J\x1b[1;1H".as_bytes()).unwrap();
output.flush().unwrap();
output.write_all(instance.ps1().as_bytes()).unwrap();
output.flush().unwrap();
instance.clear();
continue;
}
_ => {}
}
let line = if let Some(comment_start) = line.find('#') {
&line[..comment_start]
} else {
&line[..]
};
lines.push_str(line);
if in_block {
if is_in_the_expected_block(line, &lines, &mut in_block) {
lines += "\n";
output.write_all(instance.ps2().as_bytes()).unwrap();
output.flush().unwrap();
continue;
}
} else if expect_block(line) {
in_block = true;
lines += "\n";
output.write_all(instance.ps2().as_bytes()).unwrap();
output.flush().unwrap();
continue;
}
match instance.eval(mem::take(&mut lines)) {
Ok(out) => {
output.write_all((out + "\n").as_bytes()).unwrap();
output.flush().unwrap();
}
Err(errs) => {
if errs
.first()
.map(|e| e.core().kind == ErrorKind::SystemExit)
.unwrap_or(false)
{
instance.quit_successfully(output);
}
errs.fmt_all_stderr();
}
}
output.write_all(instance.ps1().as_bytes()).unwrap();
output.flush().unwrap();
instance.clear();
}
}
Input::Dummy => switch_unreachable!(),
};
if let Err(e) = res {
e.fmt_all_stderr();
instance.quit(1);
}
}fn set_input(&mut self, input: Input)
sourcefn start_message(&self) -> String
fn start_message(&self) -> String
Examples found in repository?
traits.rs (line 442)
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fn run(cfg: ErgConfig) {
let quiet_repl = cfg.quiet_repl;
let mut instance = Self::new(cfg);
let res = match instance.input() {
Input::File(_) | Input::Pipe(_) | Input::Str(_) => instance.exec(),
Input::REPL => {
let output = stdout();
let mut output = BufWriter::new(output.lock());
if !quiet_repl {
log!(info_f output, "The REPL has started.\n");
output
.write_all(instance.start_message().as_bytes())
.unwrap();
}
output.write_all(instance.ps1().as_bytes()).unwrap();
output.flush().unwrap();
let mut in_block = false;
let mut lines = String::new();
loop {
let line = chomp(&instance.input().read());
match &line[..] {
":quit" | ":exit" => {
instance.quit_successfully(output);
}
":clear" => {
output.write_all("\x1b[2J\x1b[1;1H".as_bytes()).unwrap();
output.flush().unwrap();
output.write_all(instance.ps1().as_bytes()).unwrap();
output.flush().unwrap();
instance.clear();
continue;
}
_ => {}
}
let line = if let Some(comment_start) = line.find('#') {
&line[..comment_start]
} else {
&line[..]
};
lines.push_str(line);
if in_block {
if is_in_the_expected_block(line, &lines, &mut in_block) {
lines += "\n";
output.write_all(instance.ps2().as_bytes()).unwrap();
output.flush().unwrap();
continue;
}
} else if expect_block(line) {
in_block = true;
lines += "\n";
output.write_all(instance.ps2().as_bytes()).unwrap();
output.flush().unwrap();
continue;
}
match instance.eval(mem::take(&mut lines)) {
Ok(out) => {
output.write_all((out + "\n").as_bytes()).unwrap();
output.flush().unwrap();
}
Err(errs) => {
if errs
.first()
.map(|e| e.core().kind == ErrorKind::SystemExit)
.unwrap_or(false)
{
instance.quit_successfully(output);
}
errs.fmt_all_stderr();
}
}
output.write_all(instance.ps1().as_bytes()).unwrap();
output.flush().unwrap();
instance.clear();
}
}
Input::Dummy => switch_unreachable!(),
};
if let Err(e) = res {
e.fmt_all_stderr();
instance.quit(1);
}
}sourcefn ps1(&self) -> String
fn ps1(&self) -> String
Examples found in repository?
traits.rs (line 445)
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fn run(cfg: ErgConfig) {
let quiet_repl = cfg.quiet_repl;
let mut instance = Self::new(cfg);
let res = match instance.input() {
Input::File(_) | Input::Pipe(_) | Input::Str(_) => instance.exec(),
Input::REPL => {
let output = stdout();
let mut output = BufWriter::new(output.lock());
if !quiet_repl {
log!(info_f output, "The REPL has started.\n");
output
.write_all(instance.start_message().as_bytes())
.unwrap();
}
output.write_all(instance.ps1().as_bytes()).unwrap();
output.flush().unwrap();
let mut in_block = false;
let mut lines = String::new();
loop {
let line = chomp(&instance.input().read());
match &line[..] {
":quit" | ":exit" => {
instance.quit_successfully(output);
}
":clear" => {
output.write_all("\x1b[2J\x1b[1;1H".as_bytes()).unwrap();
output.flush().unwrap();
output.write_all(instance.ps1().as_bytes()).unwrap();
output.flush().unwrap();
instance.clear();
continue;
}
_ => {}
}
let line = if let Some(comment_start) = line.find('#') {
&line[..comment_start]
} else {
&line[..]
};
lines.push_str(line);
if in_block {
if is_in_the_expected_block(line, &lines, &mut in_block) {
lines += "\n";
output.write_all(instance.ps2().as_bytes()).unwrap();
output.flush().unwrap();
continue;
}
} else if expect_block(line) {
in_block = true;
lines += "\n";
output.write_all(instance.ps2().as_bytes()).unwrap();
output.flush().unwrap();
continue;
}
match instance.eval(mem::take(&mut lines)) {
Ok(out) => {
output.write_all((out + "\n").as_bytes()).unwrap();
output.flush().unwrap();
}
Err(errs) => {
if errs
.first()
.map(|e| e.core().kind == ErrorKind::SystemExit)
.unwrap_or(false)
{
instance.quit_successfully(output);
}
errs.fmt_all_stderr();
}
}
output.write_all(instance.ps1().as_bytes()).unwrap();
output.flush().unwrap();
instance.clear();
}
}
Input::Dummy => switch_unreachable!(),
};
if let Err(e) = res {
e.fmt_all_stderr();
instance.quit(1);
}
}sourcefn ps2(&self) -> String
fn ps2(&self) -> String
Examples found in repository?
traits.rs (line 475)
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fn run(cfg: ErgConfig) {
let quiet_repl = cfg.quiet_repl;
let mut instance = Self::new(cfg);
let res = match instance.input() {
Input::File(_) | Input::Pipe(_) | Input::Str(_) => instance.exec(),
Input::REPL => {
let output = stdout();
let mut output = BufWriter::new(output.lock());
if !quiet_repl {
log!(info_f output, "The REPL has started.\n");
output
.write_all(instance.start_message().as_bytes())
.unwrap();
}
output.write_all(instance.ps1().as_bytes()).unwrap();
output.flush().unwrap();
let mut in_block = false;
let mut lines = String::new();
loop {
let line = chomp(&instance.input().read());
match &line[..] {
":quit" | ":exit" => {
instance.quit_successfully(output);
}
":clear" => {
output.write_all("\x1b[2J\x1b[1;1H".as_bytes()).unwrap();
output.flush().unwrap();
output.write_all(instance.ps1().as_bytes()).unwrap();
output.flush().unwrap();
instance.clear();
continue;
}
_ => {}
}
let line = if let Some(comment_start) = line.find('#') {
&line[..comment_start]
} else {
&line[..]
};
lines.push_str(line);
if in_block {
if is_in_the_expected_block(line, &lines, &mut in_block) {
lines += "\n";
output.write_all(instance.ps2().as_bytes()).unwrap();
output.flush().unwrap();
continue;
}
} else if expect_block(line) {
in_block = true;
lines += "\n";
output.write_all(instance.ps2().as_bytes()).unwrap();
output.flush().unwrap();
continue;
}
match instance.eval(mem::take(&mut lines)) {
Ok(out) => {
output.write_all((out + "\n").as_bytes()).unwrap();
output.flush().unwrap();
}
Err(errs) => {
if errs
.first()
.map(|e| e.core().kind == ErrorKind::SystemExit)
.unwrap_or(false)
{
instance.quit_successfully(output);
}
errs.fmt_all_stderr();
}
}
output.write_all(instance.ps1().as_bytes()).unwrap();
output.flush().unwrap();
instance.clear();
}
}
Input::Dummy => switch_unreachable!(),
};
if let Err(e) = res {
e.fmt_all_stderr();
instance.quit(1);
}
}sourcefn quit(&mut self, code: i32) -> !
fn quit(&mut self, code: i32) -> !
Examples found in repository?
traits.rs (line 512)
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fn run(cfg: ErgConfig) {
let quiet_repl = cfg.quiet_repl;
let mut instance = Self::new(cfg);
let res = match instance.input() {
Input::File(_) | Input::Pipe(_) | Input::Str(_) => instance.exec(),
Input::REPL => {
let output = stdout();
let mut output = BufWriter::new(output.lock());
if !quiet_repl {
log!(info_f output, "The REPL has started.\n");
output
.write_all(instance.start_message().as_bytes())
.unwrap();
}
output.write_all(instance.ps1().as_bytes()).unwrap();
output.flush().unwrap();
let mut in_block = false;
let mut lines = String::new();
loop {
let line = chomp(&instance.input().read());
match &line[..] {
":quit" | ":exit" => {
instance.quit_successfully(output);
}
":clear" => {
output.write_all("\x1b[2J\x1b[1;1H".as_bytes()).unwrap();
output.flush().unwrap();
output.write_all(instance.ps1().as_bytes()).unwrap();
output.flush().unwrap();
instance.clear();
continue;
}
_ => {}
}
let line = if let Some(comment_start) = line.find('#') {
&line[..comment_start]
} else {
&line[..]
};
lines.push_str(line);
if in_block {
if is_in_the_expected_block(line, &lines, &mut in_block) {
lines += "\n";
output.write_all(instance.ps2().as_bytes()).unwrap();
output.flush().unwrap();
continue;
}
} else if expect_block(line) {
in_block = true;
lines += "\n";
output.write_all(instance.ps2().as_bytes()).unwrap();
output.flush().unwrap();
continue;
}
match instance.eval(mem::take(&mut lines)) {
Ok(out) => {
output.write_all((out + "\n").as_bytes()).unwrap();
output.flush().unwrap();
}
Err(errs) => {
if errs
.first()
.map(|e| e.core().kind == ErrorKind::SystemExit)
.unwrap_or(false)
{
instance.quit_successfully(output);
}
errs.fmt_all_stderr();
}
}
output.write_all(instance.ps1().as_bytes()).unwrap();
output.flush().unwrap();
instance.clear();
}
}
Input::Dummy => switch_unreachable!(),
};
if let Err(e) = res {
e.fmt_all_stderr();
instance.quit(1);
}
}sourcefn quit_successfully(&mut self, output: BufWriter<StdoutLock<'_>>) -> !
fn quit_successfully(&mut self, output: BufWriter<StdoutLock<'_>>) -> !
Examples found in repository?
traits.rs (line 453)
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fn run(cfg: ErgConfig) {
let quiet_repl = cfg.quiet_repl;
let mut instance = Self::new(cfg);
let res = match instance.input() {
Input::File(_) | Input::Pipe(_) | Input::Str(_) => instance.exec(),
Input::REPL => {
let output = stdout();
let mut output = BufWriter::new(output.lock());
if !quiet_repl {
log!(info_f output, "The REPL has started.\n");
output
.write_all(instance.start_message().as_bytes())
.unwrap();
}
output.write_all(instance.ps1().as_bytes()).unwrap();
output.flush().unwrap();
let mut in_block = false;
let mut lines = String::new();
loop {
let line = chomp(&instance.input().read());
match &line[..] {
":quit" | ":exit" => {
instance.quit_successfully(output);
}
":clear" => {
output.write_all("\x1b[2J\x1b[1;1H".as_bytes()).unwrap();
output.flush().unwrap();
output.write_all(instance.ps1().as_bytes()).unwrap();
output.flush().unwrap();
instance.clear();
continue;
}
_ => {}
}
let line = if let Some(comment_start) = line.find('#') {
&line[..comment_start]
} else {
&line[..]
};
lines.push_str(line);
if in_block {
if is_in_the_expected_block(line, &lines, &mut in_block) {
lines += "\n";
output.write_all(instance.ps2().as_bytes()).unwrap();
output.flush().unwrap();
continue;
}
} else if expect_block(line) {
in_block = true;
lines += "\n";
output.write_all(instance.ps2().as_bytes()).unwrap();
output.flush().unwrap();
continue;
}
match instance.eval(mem::take(&mut lines)) {
Ok(out) => {
output.write_all((out + "\n").as_bytes()).unwrap();
output.flush().unwrap();
}
Err(errs) => {
if errs
.first()
.map(|e| e.core().kind == ErrorKind::SystemExit)
.unwrap_or(false)
{
instance.quit_successfully(output);
}
errs.fmt_all_stderr();
}
}
output.write_all(instance.ps1().as_bytes()).unwrap();
output.flush().unwrap();
instance.clear();
}
}
Input::Dummy => switch_unreachable!(),
};
if let Err(e) = res {
e.fmt_all_stderr();
instance.quit(1);
}
}