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feat: readline support in REPL

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This commit is contained in:
Roman Godmaire 2024-05-05 08:36:57 -04:00
parent 00ac922bd0
commit b3a9bca32d
3 changed files with 270 additions and 19 deletions
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245
Cargo.lock generated
View file

@ -23,12 +23,66 @@ version = "1.1.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
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[[package]]
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[[package]]
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[[package]]
name = "futures"
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@ -130,6 +184,33 @@ version = "0.3.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
name = "libc"
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[[package]]
name = "memchr"
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@ -142,9 +223,31 @@ version = "0.1.0"
dependencies = [
"anyhow",
"rstest",
"rustyline",
"thiserror",
]
[[package]]
name = "nibble_vec"
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"cfg-if",
"cfg_aliases",
"libc",
]
[[package]]
name = "pin-project-lite"
version = "0.2.13"
@ -175,6 +278,16 @@ dependencies = [
"proc-macro2",
]
[[package]]
name = "radix_trie"
version = "0.2.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"nibble_vec",
]
[[package]]
name = "regex"
version = "1.9.5"
@ -248,6 +361,41 @@ dependencies = [
"semver",
]
[[package]]
name = "rustix"
version = "0.38.34"
source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"errno",
"libc",
"linux-raw-sys",
"windows-sys",
]
[[package]]
name = "rustyline"
version = "14.0.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
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"clipboard-win",
"fd-lock",
"home",
"libc",
"log",
"memchr",
"nix",
"radix_trie",
"unicode-segmentation",
"unicode-width",
"utf8parse",
"windows-sys",
]
[[package]]
name = "semver"
version = "1.0.18"
@ -263,6 +411,12 @@ dependencies = [
"autocfg",
]
[[package]]
name = "smallvec"
version = "1.13.2"
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@ -299,3 +453,94 @@ name = "unicode-ident"
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1
Cargo.toml
View file

@ -7,6 +7,7 @@ edition = "2021"
[dependencies]
anyhow = "1.0.75"
rustyline = "14.0.0"
thiserror = "1.0.48"
[dev-dependencies]

43
src/main.rs
View file

@ -1,4 +1,4 @@
use std::io::{self, Write};
use rustyline::{error::ReadlineError, DefaultEditor};
mod env;
mod error;
@ -9,30 +9,35 @@ mod parser;
fn main() {
let env = env::Environment::new();
let mut input = String::new();
let mut rl = DefaultEditor::new().unwrap();
println!("Mute -- REPL");
loop {
print!("> ");
io::stdout().flush().expect("failed to write to stdout");
let readline = rl.readline("> ");
let bytes_read = io::stdin()
.read_line(&mut input)
.expect("failed to read from stdin");
match readline {
Ok(line) => {
rl.add_history_entry(line.as_str()).unwrap();
if bytes_read == 0 {
break;
let ast = parser::parse_str(&line).unwrap();
let res = evaluator::eval(&env, ast);
match res {
Ok(expressions) => expressions.into_iter().for_each(|expr| println!("{expr}")),
Err(err) => println!("{}", err),
}
}
Err(ReadlineError::Interrupted) => {
continue;
}
Err(ReadlineError::Eof) => {
break;
}
Err(err) => {
println!("Error: {:?}", err);
break;
}
}
let ast = parser::parse_str(&input).unwrap();
let res = evaluator::eval(&env, ast);
match res {
Ok(expressions) => expressions.into_iter().for_each(|expr| println!("{expr}")),
Err(err) => println!("{}", err),
}
input.clear();
}
}