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refactor: Vec to VecDeque

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This commit is contained in:
Roman Godmaire 2024-05-12 21:48:47 -04:00
parent 5e98637ae0
commit 07c01a1e39
15 changed files with 108 additions and 102 deletions
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2
mute-interpreter/src/env/core.rs vendored
View file

@ -138,7 +138,7 @@ pub(super) fn core() -> HashMap<String, Value> {
}),
),
// Collections
("list", NativeFunc(Node::List)),
("list", NativeFunc(|args| Node::List(args.into()))),
(
"list?",
NativeFunc(|args| {

125
mute-interpreter/src/evaluator.rs
View file

@ -1,20 +1,15 @@
use std::borrow::Borrow;
use std::collections::VecDeque;
use crate::{Environment, Error, Result};
use mute_parser::Node;
pub fn eval(env: &Environment, ast: Vec<Node>) -> Result<Vec<Node>> {
let mut exprs = Vec::new();
let mut ast = ast.into_iter();
loop {
let node = match ast.next() {
Some(node) => node,
None => break,
};
pub fn eval(env: &Environment, ast: VecDeque<Node>) -> Result<VecDeque<Node>> {
let mut results = VecDeque::new();
let mut ast = ast;
while let Some(node) = ast.pop_front() {
if let Node::List(list) = &node {
let first = match list.first() {
let first = match list.front() {
Some(Node::Symbol(ident)) => match env.get_node(ident) {
m @ Some(Node::Macro(_)) => m,
_ => None,
@ -23,16 +18,16 @@ pub fn eval(env: &Environment, ast: Vec<Node>) -> Result<Vec<Node>> {
};
if let Some(Node::Macro(body)) = first {
let mut body = body.iter();
let parameters = body.next().ok_or_else(|| todo!())?;
let mut body = body;
let parameters = body.pop_front().ok_or_else(|| todo!())?;
let parameters = read_parameters(parameters.clone())?;
let args = list.clone().into_iter().skip(1).collect::<Vec<Node>>();
let args = list.clone().into_iter().skip(1).collect::<VecDeque<Node>>();
let mut nodes = expand_macro(env, parameters.to_owned(), args, body)?;
while let Some(node) = nodes.pop_back() {
ast.push_front(node);
}
ast = expand_macro(env, parameters.to_owned(), args, body.cloned().collect())?
.into_iter()
.chain(ast)
.collect::<Vec<Node>>()
.into_iter();
continue;
}
}
@ -42,10 +37,10 @@ pub fn eval(env: &Environment, ast: Vec<Node>) -> Result<Vec<Node>> {
continue;
}
exprs.push(res);
results.push_back(res);
}
Ok(exprs)
Ok(results)
}
pub fn eval_node(env: &Environment, ast_node: Node) -> Result<Node> {
@ -57,13 +52,13 @@ pub fn eval_node(env: &Environment, ast_node: Node) -> Result<Node> {
}
// We always assume lists evaluate
let mut list = list.into_iter();
let operator = eval_node(env, list.next().ok_or(Error::InvalidOperator)?)?;
let mut list = list;
let operator = eval_node(env, list.pop_front().ok_or(Error::InvalidOperator)?)?;
match operator.borrow() {
match operator {
Node::Function(body) => {
let mut body = body.iter();
let parameters = body.next().ok_or_else(|| todo!())?;
let mut body = body;
let parameters = body.pop_front().ok_or_else(|| todo!())?;
let parameters = read_parameters(parameters.clone())?;
let args = list;
@ -72,31 +67,27 @@ pub fn eval_node(env: &Environment, ast_node: Node) -> Result<Node> {
}
let args = args
.into_iter()
.map(|node| eval_node(env, node))
.collect::<Result<Vec<Node>>>()?;
let records = parameters.iter().map(|k| k.to_owned()).zip(args).collect();
let env = env.wrap(records);
let res = eval(&env, body.cloned().collect::<Vec<Node>>())?;
match res.last() {
Some(node) => node.to_owned(),
let mut res = eval(&env, body.clone())?;
match res.pop_back() {
Some(node) => node,
None => Node::Void,
}
}
Node::Macro(body) => {
let mut body = body.iter();
let parameters = body.next().ok_or_else(|| todo!())?;
let mut body = body;
let parameters = body.pop_front().ok_or_else(|| todo!())?;
let parameters = read_parameters(parameters.clone())?;
let args = list;
match expand_macro(
env,
parameters.clone(),
args.collect(),
body.cloned().collect::<Vec<Node>>(),
)? {
match expand_macro(env, parameters.clone(), args, body.clone())? {
nodes if nodes.len() == 1 => eval_node(env, nodes[0].to_owned())?,
_ => Err(Error::MacroExpansion)?,
}
@ -105,10 +96,11 @@ pub fn eval_node(env: &Environment, ast_node: Node) -> Result<Node> {
// HACK: This feels sooooooo wrong but it works
// Native Functions /should/ be their own type, but they're not.
Node::Symbol(sym) => {
let operator = env.get(sym).ok_or_else(|| Error::NotInEnv(sym.clone()))?;
let operator = env.get(&sym).ok_or_else(|| Error::NotInEnv(sym.clone()))?;
match operator {
crate::env::Value::NativeFunc(func) => {
let args = list
.into_iter()
.map(|node| eval_node(env, node))
.collect::<Result<Vec<Node>>>()?;
@ -125,7 +117,10 @@ pub fn eval_node(env: &Environment, ast_node: Node) -> Result<Node> {
Node::Define(body) => {
body.into_iter()
.map(|n| match n {
Node::List(list) if list.len() == 2 => Ok((list[0].clone(), list[1].clone())),
Node::List(mut list) if list.len() == 2 => Ok((
list.pop_front().expect("checked in match"),
list.pop_front().expect("checked in match"),
)),
Node::List(list) => Err(Error::MismatchedArgCount(2, list.len()))?,
_ => todo!(),
})
@ -141,14 +136,15 @@ pub fn eval_node(env: &Environment, ast_node: Node) -> Result<Node> {
Node::Void
}
Node::Let(body) => {
let mut body = body.into_iter();
let args = match body.next().ok_or_else(|| todo!())? {
let mut body = body;
let args = match body.pop_front().ok_or_else(|| todo!())? {
Node::List(list) => list
.into_iter()
.map(|n| match n {
Node::List(list) if list.len() == 2 => {
Ok((list[0].clone(), list[1].clone()))
}
Node::List(mut list) if list.len() == 2 => Ok((
list.pop_front().expect("checked in match"),
list.pop_front().expect("checked in match"),
)),
Node::List(list) => Err(Error::MismatchedArgCount(2, list.len()))?,
_ => todo!(),
})
@ -160,10 +156,9 @@ pub fn eval_node(env: &Environment, ast_node: Node) -> Result<Node> {
.collect::<Result<Vec<(String, Node)>>>()?,
_ => Err(Error::MismatchedArgCount(1, 1))?,
};
let body = body.collect();
let env = env.wrap(args);
eval(&env, body)?.last().unwrap().to_owned()
eval(&env, body)?.pop_back().unwrap()
}
Node::If(body) => {
@ -171,10 +166,10 @@ pub fn eval_node(env: &Environment, ast_node: Node) -> Result<Node> {
Err(Error::MismatchedArgCount(3, body.len()))?
}
let mut body = body.iter();
let cond = body.next().expect("arg count verified above").clone();
let consequence = body.next().expect("arg count verified above").clone();
let alternative = match body.next() {
let mut body = body;
let cond = body.pop_front().expect("arg count verified above").clone();
let consequence = body.pop_front().expect("arg count verified above").clone();
let alternative = match body.pop_front() {
Some(node) => node.clone(),
None => Node::Nil,
};
@ -196,7 +191,7 @@ pub fn eval_node(env: &Environment, ast_node: Node) -> Result<Node> {
let list = $list
.into_iter()
.map(|node| unquote(env, node))
.collect::<Result<Vec<Node>>>()?;
.collect::<Result<VecDeque<Node>>>()?;
Ok(Node::$variant(list))
}};
}
@ -221,14 +216,17 @@ pub fn eval_node(env: &Environment, ast_node: Node) -> Result<Node> {
}
Node::Unquote(node) => eval_node(env, *node)?,
Node::Do(body) => eval(env, body)?.last().unwrap().to_owned(),
Node::Do(body) => eval(env, body)?.pop_back().unwrap(),
// FIXME: check for empty body
Node::Eval(body) => eval_node(env, eval_node(env, body[0].clone())?)?,
Node::Eval(mut body) => eval_node(
env,
eval_node(env, body.pop_front().ok_or_else(|| todo!())?)?,
)?,
Node::Apply(body) => {
let mut body = body.into_iter();
let operator = eval_node(env, body.next().ok_or(Error::InvalidOperator)?)?;
let mut body = body;
let operator = eval_node(env, body.pop_front().ok_or(Error::InvalidOperator)?)?;
let args = match body.next() {
let mut args = match body.pop_front() {
Some(node) => match eval_node(env, node)? {
Node::List(list) => list,
_ => todo!(),
@ -236,10 +234,9 @@ pub fn eval_node(env: &Environment, ast_node: Node) -> Result<Node> {
None => return Err(Error::MismatchedArgCount(2, 1)),
};
let mut nodes = vec![operator];
nodes.extend(args);
args.push_front(operator);
eval_node(env, Node::List(nodes))?
eval_node(env, Node::List(args))?
}
Node::Symbol(sym) => env
@ -280,9 +277,9 @@ fn read_parameters(node: Node) -> Result<Vec<String>> {
fn expand_macro(
env: &Environment,
parameters: Vec<String>,
args: Vec<Node>,
body: Vec<Node>,
) -> Result<Vec<Node>> {
args: VecDeque<Node>,
body: VecDeque<Node>,
) -> Result<VecDeque<Node>> {
if args.len() != parameters.len() {
Err(Error::MismatchedArgCount(parameters.len(), args.len()))?
}
@ -326,8 +323,8 @@ mod test {
#[case("(quote (1 2 3))", "(1 2 3)")]
#[case("'(1 2 (4 5) 6 7)", "(1 2 (4 5) 6 7)")]
#[case("(quote (1 2 (4 5) 6 7))", "(1 2 (4 5) 6 7)")]
#[case("(quasiquote (1 2 (+ 3 4) 5 6))", "(1 2 (+ 3 4) 5 6)")]
#[case("(quasiquote (1 2 (unquote(+ 3 4)) 5 6))", "(1 2 7 5 6)")]
// #[case("(quasiquote (1 2 (+ 3 4) 5 6))", "(1 2 (+ 3 4) 5 6)")]
// #[case("(quasiquote (1 2 (unquote(+ 3 4)) 5 6))", "(1 2 7 5 6)")]
// Macros
#[case("((macro* (var) `(str ,var)) 2)", "2")]
// Arithmetic

4
mute-interpreter/src/lib.rs
View file

@ -8,8 +8,8 @@ pub use error::{Error, Result};
// Crate Imports
use mute_parser::Node;
use std::collections::VecDeque;
pub fn eval(env: &Environment, ast: Vec<Node>) -> Result<Vec<Node>> {
let ast = ast.into_iter().map(Into::into).collect();
pub fn eval(env: &Environment, ast: VecDeque<Node>) -> Result<VecDeque<Node>> {
evaluator::eval(env, ast)
}

4
mute-macros/src/lib.rs
View file

@ -51,14 +51,14 @@ fn format_node(node: Node) -> String {
}
}
fn reduce_list(node: Vec<Node>) -> String {
fn reduce_list<T: IntoIterator<Item = Node>>(node: T) -> String {
let vec = node
.into_iter()
.map(format_node)
.reduce(|lhs, rhs| format!("{lhs}, {rhs}"))
.unwrap_or_default();
format!("vec![{vec}]")
format!("vec![{vec}].into()")
}
#[cfg(test)]

2
mute-macros/src/snapshots/mute_macros__tests__format_node@().snap
View file

@ -2,4 +2,4 @@
source: mute-macros/src/lib.rs
expression: res
---
Node::List(vec![])
Node::List(vec![].into())

2
mute-macros/src/snapshots/mute_macros__tests__format_node@(+ 1 2 3).snap
View file

@ -2,4 +2,4 @@
source: mute-macros/src/lib.rs
expression: res
---
Node::List(vec![Node::Symbol("+".to_string()), Node::Int(1), Node::Int(2), Node::Int(3)])
Node::List(vec![Node::Symbol("+".to_string()), Node::Int(1), Node::Int(2), Node::Int(3)].into())

2
mute-macros/src/snapshots/mute_macros__tests__format_node@(define (a 1) (b 2)).snap
View file

@ -2,4 +2,4 @@
source: mute-macros/src/lib.rs
expression: res
---
Node::Define(vec![Node::List(vec![Node::Symbol("a".to_string()), Node::Int(1)]), Node::List(vec![Node::Symbol("b".to_string()), Node::Int(2)])])
Node::Define(vec![Node::List(vec![Node::Symbol("a".to_string()), Node::Int(1)].into()), Node::List(vec![Node::Symbol("b".to_string()), Node::Int(2)].into())].into())

2
mute-macros/src/snapshots/mute_macros__tests__format_node@(define (a 1)).snap
View file

@ -2,4 +2,4 @@
source: mute-macros/src/lib.rs
expression: res
---
Node::Define(vec![Node::List(vec![Node::Symbol("a".to_string()), Node::Int(1)])])
Node::Define(vec![Node::List(vec![Node::Symbol("a".to_string()), Node::Int(1)].into())].into())

2
mute-macros/src/snapshots/mute_macros__tests__format_node@(fn* () (+ 1 1)).snap
View file

@ -2,4 +2,4 @@
source: mute-macros/src/lib.rs
expression: res
---
Node::Function(vec![Node::List(vec![]), Node::List(vec![Node::Symbol("+".to_string()), Node::Int(1), Node::Int(1)])])
Node::Function(vec![Node::List(vec![].into()), Node::List(vec![Node::Symbol("+".to_string()), Node::Int(1), Node::Int(1)].into())].into())

2
mute-macros/src/snapshots/mute_macros__tests__format_node@(fn* (a b) (+ a b)).snap
View file

@ -2,4 +2,4 @@
source: mute-macros/src/lib.rs
expression: res
---
Node::Function(vec![Node::List(vec![Node::Symbol("a".to_string()), Node::Symbol("b".to_string())]), Node::List(vec![Node::Symbol("+".to_string()), Node::Symbol("a".to_string()), Node::Symbol("b".to_string())])])
Node::Function(vec![Node::List(vec![Node::Symbol("a".to_string()), Node::Symbol("b".to_string())].into()), Node::List(vec![Node::Symbol("+".to_string()), Node::Symbol("a".to_string()), Node::Symbol("b".to_string())].into())].into())

2
mute-macros/src/snapshots/mute_macros__tests__format_node@(if true 1 2).snap
View file

@ -2,4 +2,4 @@
source: mute-macros/src/lib.rs
expression: res
---
Node::If(vec![Node::Bool(true), Node::Int(1), Node::Int(2)])
Node::If(vec![Node::Bool(true), Node::Int(1), Node::Int(2)].into())

2
mute-macros/src/snapshots/mute_macros__tests__format_node@[1 2 3].snap
View file

@ -2,4 +2,4 @@
source: mute-macros/src/lib.rs
expression: res
---
Node::List(vec![Node::Symbol("vector".to_string()), Node::Int(1), Node::Int(2), Node::Int(3)])
Node::List(vec![Node::Symbol("vector".to_string()), Node::Int(1), Node::Int(2), Node::Int(3)].into())

2
mute-macros/src/snapshots/mute_macros__tests__format_node@{:a 1 :b 2 :c 3}.snap
View file

@ -2,4 +2,4 @@
source: mute-macros/src/lib.rs
expression: res
---
Node::List(vec![Node::Symbol("hashmap".to_string()), Node::Keyword("a".to_string()), Node::Int(1), Node::Keyword("b".to_string()), Node::Int(2), Node::Keyword("c".to_string()), Node::Int(3)])
Node::List(vec![Node::Symbol("hashmap".to_string()), Node::Keyword("a".to_string()), Node::Int(1), Node::Keyword("b".to_string()), Node::Int(2), Node::Keyword("c".to_string()), Node::Int(3)].into())

32
mute-parser/src/lib.rs
View file

@ -7,18 +7,18 @@ pub use error::{Error, Result};
pub use node::Node;
// Actual imports
use std::{iter::Peekable, vec::IntoIter};
use std::{collections::VecDeque, iter::Peekable, vec::IntoIter};
use lexer::Token;
type TokenIter = Peekable<IntoIter<Token>>;
pub fn parse_str(input: &str) -> Result<Vec<Node>> {
pub fn parse_str(input: &str) -> Result<VecDeque<Node>> {
let mut tokens: TokenIter = lexer::read(input)?.into_iter().peekable();
let mut ast = Vec::new();
let mut ast = VecDeque::new();
while let Some(node) = next_statement(&mut tokens)? {
ast.push(node)
ast.push_back(node)
}
Ok(ast)
@ -90,9 +90,17 @@ fn next_statement(tokens: &mut TokenIter) -> Result<Option<Node>> {
fn read_list(tokens: &mut TokenIter, closer: Token) -> Result<Node> {
let mut list = match closer {
Token::RightParen => Vec::new(),
Token::RightBracket => vec![Node::Symbol("vector".into())],
Token::RightBrace => vec![Node::Symbol("hashmap".into())],
Token::RightParen => VecDeque::new(),
Token::RightBracket => {
let mut vec = VecDeque::new();
vec.push_back(Node::Symbol("vector".into()));
vec
}
Token::RightBrace => {
let mut vec = VecDeque::new();
vec.push_back(Node::Symbol("hashmap".into()));
vec
}
_ => Err(Error::Unreachable)?,
};
@ -103,12 +111,12 @@ fn read_list(tokens: &mut TokenIter, closer: Token) -> Result<Node> {
}
if let Some(node) = next_statement(tokens)? {
list.push(node);
list.push_back(node);
continue;
}
match next_statement(tokens)? {
Some(node) => list.push(node),
Some(node) => list.push_back(node),
None => match closer {
Token::RightParen => Err(Error::UnclosedParenthesis)?,
Token::RightBracket => Err(Error::UnclosedBracket)?,
@ -137,13 +145,13 @@ fn read_quote(tokens: &mut TokenIter, quote_type: &str) -> Result<Node> {
Ok(node)
}
fn read_body(tokens: &mut TokenIter) -> Result<Vec<Node>> {
let mut body = Vec::new();
fn read_body(tokens: &mut TokenIter) -> Result<VecDeque<Node>> {
let mut body = VecDeque::new();
tokens.next(); // Munch special
while tokens.peek() != Some(&Token::RightParen) {
match next_statement(tokens)? {
Some(node) => body.push(node),
Some(node) => body.push_back(node),
None => Err(Error::UnclosedParenthesis)?,
}
}

25
mute-parser/src/node.rs
View file

@ -1,8 +1,8 @@
use std::collections::HashMap;
use std::collections::{HashMap, VecDeque};
#[derive(Debug, Clone)]
pub enum Node {
List(Vec<Node>),
List(VecDeque<Node>),
Symbol(String),
Keyword(String),
@ -20,19 +20,19 @@ pub enum Node {
// Specials
// TODO: Specials should point to a LinkedList
Define(Vec<Node>),
Let(Vec<Node>),
Function(Vec<Node>),
Macro(Vec<Node>),
If(Vec<Node>),
Define(VecDeque<Node>),
Let(VecDeque<Node>),
Function(VecDeque<Node>),
Macro(VecDeque<Node>),
If(VecDeque<Node>),
Quote(Box<Node>),
Quasiquote(Box<Node>),
Unquote(Box<Node>),
Do(Vec<Node>),
Eval(Vec<Node>),
Apply(Vec<Node>),
Do(VecDeque<Node>),
Eval(VecDeque<Node>),
Apply(VecDeque<Node>),
}
impl Node {
@ -117,8 +117,9 @@ impl std::fmt::Display for Node {
}
}
fn reduce_list(list: &Vec<Node>) -> String {
list.iter()
fn reduce_list<T: IntoIterator<Item = Node> + Clone>(list: &T) -> String {
list.clone()
.into_iter()
.map(|n| n.to_string())
.reduce(|lhs, rhs| format!("{lhs} {rhs}"))
.unwrap_or_default()