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Réorganisation des dépendances avant la mise en place des tests

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This commit is contained in:
Emmanuel BERNAT
2024-04-04 08:23:10 +02:00
parent 35c9ce4b5d
commit b218a4b427
7 changed files with 322 additions and 307 deletions
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9
src/main.rs
View File

@@ -5,7 +5,12 @@ use std::io::Write;
use std::process;
mod rlox;
mod scanner;
mod token_type;
mod token;
use crate::rlox::RLox;
use crate::scanner::Scanner;
// Exit codes from #include <sysexits.h>
const EX_OK: i32 = 0;
@@ -54,10 +59,8 @@ fn run_prompt() -> i32 {
exit_code
}
fn run( _script: String ) -> i32 {
fn run( script: String ) -> i32 {
let rlox_interpreter = RLox { had_error: false };
if rlox_interpreter.had_error { EX_DATAERR } else { EX_OK }
}

11
src/rlox.rs
View File

@@ -1,12 +1,9 @@
mod token_type;
mod token;
mod scanner;
use crate::scanner::Scanner;
pub struct RLox {
pub had_error: bool,
}
impl RLox {
fn error(&self, line: u32, message: String) {
self.report(line, String::from(""), message);
@@ -15,4 +12,10 @@ impl RLox {
fn report(&self, line: u32, place: String, message: String) {
println!("[line {line}] Error {place}: {message}");
}
fn run(&self, src: String) {
let mut scanner = Scanner::create_scanner( src );
}
}

191
src/rlox/scanner.rs
View File

@@ -1,191 +0,0 @@
use super::token_type::TokenType;
use super::token::Token;
use std::collections::HashMap;
//scores.insert(String::from("Blue"), 10);
fn is_digit( c: char ) -> bool {
c>='0' && c<='9'
}
fn is_alpha( c: char ) -> bool {
(c>='a' && c<='z') || (c>='A' && c<='Z') || c=='_'
}
fn is_alpha_numeric ( c: char ) -> bool {
is_digit(c) || is_alpha(c)
}
struct Scanner {
source: Vec<char>,
tokens: Vec<Token>,
start: usize,
current: usize,
line: u32,
keywords: HashMap<String, TokenType>,
}
impl Scanner {
fn init_keywords(&mut self) {
self.keywords = HashMap::new();
self.keywords.insert( String::from("and"), TokenType::And );
self.keywords.insert( String::from("class"), TokenType::Class );
self.keywords.insert( String::from("else"), TokenType::Else );
self.keywords.insert( String::from("false"), TokenType::False );
self.keywords.insert( String::from("for"), TokenType::For );
self.keywords.insert( String::from("fun"), TokenType::Fun );
self.keywords.insert( String::from("if"), TokenType::If );
self.keywords.insert( String::from("nil"), TokenType::Nil );
self.keywords.insert( String::from("or"), TokenType::Or );
self.keywords.insert( String::from("print"), TokenType::Print );
self.keywords.insert( String::from("return"), TokenType::Return );
self.keywords.insert( String::from("super"), TokenType::Super );
self.keywords.insert( String::from("this"), TokenType::This );
self.keywords.insert( String::from("true"), TokenType::True );
self.keywords.insert( String::from("var"), TokenType::Var );
self.keywords.insert( String::from("while"), TokenType::While );
}
fn scan_tokens(&mut self) {
while !self.is_at_end() {
self.start = self.current;
self.scan_token();
}
// Ajout d'un token final quand il n'y a plus rien à parser
self.tokens.push(Token{ token_type: TokenType::Eof, lexeme: String::from(""), literal: String::from(""), line: self.line } );
}
fn is_at_end(&self) -> bool {
self.current>= self.source.len()
}
fn scan_token(&mut self) {
let c = self.advance();
match c {
'(' => self.add_simple_token( TokenType::LeftParen ),
')' => self.add_simple_token( TokenType::RightParen ),
'{' => self.add_simple_token( TokenType::LeftBrace ),
'}' => self.add_simple_token( TokenType::RightBrace ),
',' => self.add_simple_token( TokenType::Comma ),
'.' => self.add_simple_token( TokenType::Dot ),
'-' => self.add_simple_token( TokenType::Minus ),
'+' => self.add_simple_token( TokenType::Plus ),
';' => self.add_simple_token( TokenType::Semicolon ),
'*' => self.add_simple_token( TokenType::Star ),
'!' => { if self.match_next('=') { self.add_simple_token( TokenType::BangEqual ) } else { self.add_simple_token( TokenType::Bang ) } },
'=' => { if self.match_next('=') { self.add_simple_token( TokenType::EqualEqual ) } else { self.add_simple_token( TokenType::Equal ) } },
'<' => { if self.match_next('=') { self.add_simple_token( TokenType::LessEqual ) } else { self.add_simple_token( TokenType::Less ) } },
'>' => { if self.match_next('=') { self.add_simple_token( TokenType::GreaterEqual ) } else { self.add_simple_token( TokenType::Greater ) } },
'/' => { if self.match_next('/') {
// commentaire : avance jusqu'à la fin de la ligne sans ajouter de token
while self.peek()!='\n' && !self.is_at_end() {
self.advance();
}
} else {
self.add_simple_token( TokenType::Slash ) }
},
' ' => (),
'\r' => (),
'\t' => (),
'\n' => self.line += 1,
'"' => self.string(),
_ => {
if is_digit(c) {
self.number();
} else if is_alpha(c) {
self.identifier();
} else {
// Erreur : lexeme inconnu
}
}
}
}
fn advance(&mut self) -> char {
self.current += 1;
self.source[self.current]
}
fn match_next(&mut self, expected: char) -> bool {
if self.is_at_end() { return false; }
if self.source[self.current]!=expected { return false; }
self.current += 1;
true
}
fn peek(&self) -> char {
if self.is_at_end() {
'\0'
} else {
self.source[self.current]
}
}
fn peek_next(&self) -> char {
if self.current+1 >= self.source.len() {
'\0'
} else {
self.source[self.current + 1]
}
}
fn add_simple_token(&mut self, t: TokenType) {
self.add_token(t, String::from(""));
}
fn add_token(&mut self, t: TokenType, l: String) {
let text = self.source[self.start..self.current].iter().collect();
self.tokens.push(Token{ token_type: t, lexeme: text, literal: l, line: self.line } );
}
fn string(&mut self) {
// Consomme les caractères jusqu'à trouver le délimiteur de chaînes ou la fin du fichier
while self.peek()!='"' && !self.is_at_end() {
if self.peek()=='\n' {
self.line += 1; // les chaînes peuvent être multilignes
}
self.advance();
}
if self.is_at_end() {
// Erreur : chaîne non terminée
return;
}
self.advance(); // Consomme le délimiteur final
self.add_token( TokenType::String, self.source[self.start+1..self.current-1].into_iter().collect() );
}
fn number(&mut self) {
while is_digit(self.peek()) {
self.advance();
}
if self.peek()=='.' && is_digit(self.peek_next()) {
while is_digit(self.peek()) {
self.advance();
}
}
self.add_token( TokenType::Number, self.source[self.start..self.current].into_iter().collect() ); // Il faudra faire un parse sur la chaîne pour connaître la valeur effective
}
fn identifier(&mut self) {
while is_alpha_numeric(self.peek()) {
self.advance();
}
let text: String = self.source[self.start..self.current].into_iter().collect();
match self.keywords.get(&text) {
Some( t ) => { self.add_simple_token( *t ) },
None => { self.add_token( TokenType::Identifier, text ) }
}
}
}

106
src/rlox/token_type.rs
View File

@@ -1,106 +0,0 @@
#[derive(Debug, Copy, Clone)]
pub enum TokenType {
// Single-character tokens.
LeftParen,
RightParen,
LeftBrace,
RightBrace,
Comma,
Dot,
Minus,
Plus,
Semicolon,
Slash,
Star,
// One or two character tokens.
Bang,
BangEqual,
Equal,
EqualEqual,
Greater,
GreaterEqual,
Less,
LessEqual,
// Literals.
Identifier,
String,
Number,
// Keywords.
And,
Class,
Else,
False,
Fun,
For,
If,
Nil,
Or,
Print,
Return,
Super,
This,
True,
Var,
While,
Eof,
}
impl std::fmt::Display for crate::rlox::token_type::TokenType {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
match self {
// Single-character tokens.
TokenType::LeftParen=> write!(f, "LEFT_PAREN"),
TokenType::RightParen=> write!(f, "RIGHT_PAREN"),
TokenType::LeftBrace=> write!(f, "LEFT_BRACE"),
TokenType::RightBrace=> write!(f, "RIGHT_BRACE"),
TokenType::Comma=> write!(f, "COMMA"),
TokenType::Dot=> write!(f, "DOT"),
TokenType::Minus=> write!(f, "MINUS"),
TokenType::Plus=> write!(f, "PLUS"),
TokenType::Semicolon=> write!(f, "SEMICOLON"),
TokenType::Slash=> write!(f, "SLASH"),
TokenType::Star=> write!(f, "STAR"),
// One or two character tokens.
TokenType::Bang=> write!(f, "BANG"),
TokenType::BangEqual=> write!(f, "BANG_EQUAL"),
TokenType::Equal=> write!(f, "EQUAL"),
TokenType::EqualEqual=> write!(f, "EQUAL_EQUAL"),
TokenType::Greater=> write!(f, "GREATER"),
TokenType::GreaterEqual=> write!(f, "GREATER_EQUAL"),
TokenType::Less=> write!(f, "LESS"),
TokenType::LessEqual=> write!(f, "LESS_EQUAL"),
// Literals.
TokenType::Identifier=> write!(f, "IDENTIFIER"),
TokenType::String=> write!(f, "STRING"),
TokenType::Number=> write!(f, "NUMBER"),
// Keywords.
TokenType::And=> write!(f, "AND"),
TokenType::Class=> write!(f, "CLASS"),
TokenType::Else=> write!(f, "ELSE"),
TokenType::False=> write!(f, "FALSE"),
TokenType::Fun=> write!(f, "FUN"),
TokenType::For=> write!(f, "FOR"),
TokenType::If=> write!(f, "IF"),
TokenType::Nil=> write!(f, "NIL"),
TokenType::Or=> write!(f, "OR"),
TokenType::Print=> write!(f, "PRINT"),
TokenType::Return=> write!(f, "RETURN"),
TokenType::Super=> write!(f, "SUPER"),
TokenType::This=> write!(f, "THIS"),
TokenType::True=> write!(f, "TRUE"),
TokenType::Var=> write!(f, "VAR"),
TokenType::While=> write!(f, "WHILE"),
TokenType::Eof=> write!(f, "EOF"),
}
}
}

200
src/scanner.rs Normal file
View File

@@ -0,0 +1,200 @@
use std::collections::HashMap;
use crate::token::Token;
use crate::token_type::TokenType;
fn is_digit(c: char) -> bool {
c >= '0' && c <= '9'
}
fn is_alpha(c: char) -> bool {
(c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || c == '_'
}
fn is_alpha_numeric(c: char) -> bool {
is_digit(c) || is_alpha(c)
}
pub struct Scanner {
source: Vec<char>,
tokens: Vec<Token>,
start: usize,
current: usize,
line: u32,
keywords: HashMap<String, TokenType>,
}
impl Scanner {
pub fn create_scanner( src: String ) -> Self {
Self {
source: src.chars().collect::<Vec<_>>(),
tokens: vec![],
start: 0,
current: 0,
line: 0,
keywords: HashMap::new()
}
}
fn init_keywords(&mut self) {
self.keywords = HashMap::new();
self.keywords.insert(String::from("and"), TokenType::And);
self.keywords.insert(String::from("class"), TokenType::Class);
self.keywords.insert(String::from("else"), TokenType::Else);
self.keywords.insert(String::from("false"), TokenType::False);
self.keywords.insert(String::from("for"), TokenType::For);
self.keywords.insert(String::from("fun"), TokenType::Fun);
self.keywords.insert(String::from("if"), TokenType::If);
self.keywords.insert(String::from("nil"), TokenType::Nil);
self.keywords.insert(String::from("or"), TokenType::Or);
self.keywords.insert(String::from("print"), TokenType::Print);
self.keywords.insert(String::from("return"), TokenType::Return);
self.keywords.insert(String::from("super"), TokenType::Super);
self.keywords.insert(String::from("this"), TokenType::This);
self.keywords.insert(String::from("true"), TokenType::True);
self.keywords.insert(String::from("var"), TokenType::Var);
self.keywords.insert(String::from("while"), TokenType::While);
}
fn scan_tokens(&mut self) {
while !self.is_at_end() {
self.start = self.current;
self.scan_token();
}
// Ajout d'un token final quand il n'y a plus rien à parser
self.tokens.push(Token { token_type: TokenType::Eof, lexeme: String::from(""), literal: String::from(""), line: self.line });
}
fn is_at_end(&self) -> bool {
self.current >= self.source.len()
}
fn scan_token(&mut self) {
let c = self.advance();
match c {
'(' => self.add_simple_token(TokenType::LeftParen),
')' => self.add_simple_token(TokenType::RightParen),
'{' => self.add_simple_token(TokenType::LeftBrace),
'}' => self.add_simple_token(TokenType::RightBrace),
',' => self.add_simple_token(TokenType::Comma),
'.' => self.add_simple_token(TokenType::Dot),
'-' => self.add_simple_token(TokenType::Minus),
'+' => self.add_simple_token(TokenType::Plus),
';' => self.add_simple_token(TokenType::Semicolon),
'*' => self.add_simple_token(TokenType::Star),
'!' => { if self.match_next('=') { self.add_simple_token(TokenType::BangEqual) } else { self.add_simple_token(TokenType::Bang) } },
'=' => { if self.match_next('=') { self.add_simple_token(TokenType::EqualEqual) } else { self.add_simple_token(TokenType::Equal) } },
'<' => { if self.match_next('=') { self.add_simple_token(TokenType::LessEqual) } else { self.add_simple_token(TokenType::Less) } },
'>' => { if self.match_next('=') { self.add_simple_token(TokenType::GreaterEqual) } else { self.add_simple_token(TokenType::Greater) } },
'/' => {
if self.match_next('/') {
// commentaire : avance jusqu'à la fin de la ligne sans ajouter de token
while self.peek() != '\n' && !self.is_at_end() {
self.advance();
}
} else {
self.add_simple_token(TokenType::Slash)
}
},
' ' => (),
'\r' => (),
'\t' => (),
'\n' => self.line += 1,
'"' => self.string(),
_ => {
if is_digit(c) {
self.number();
} else if is_alpha(c) {
self.identifier();
} else {
// Erreur : lexeme inconnu
}
}
}
}
fn advance(&mut self) -> char {
self.current += 1;
self.source[self.current]
}
fn match_next(&mut self, expected: char) -> bool {
if self.is_at_end() { return false; }
if self.source[self.current] != expected { return false; }
self.current += 1;
true
}
fn peek(&self) -> char {
if self.is_at_end() {
'\0'
} else {
self.source[self.current]
}
}
fn peek_next(&self) -> char {
if self.current + 1 >= self.source.len() {
'\0'
} else {
self.source[self.current + 1]
}
}
fn add_simple_token(&mut self, t: TokenType) {
self.add_token(t, String::from(""));
}
fn add_token(&mut self, t: TokenType, l: String) {
let text = self.source[self.start..self.current].iter().collect();
self.tokens.push(Token { token_type: t, lexeme: text, literal: l, line: self.line });
}
fn string(&mut self) {
// Consomme les caractères jusqu'à trouver le délimiteur de chaînes ou la fin du fichier
while self.peek() != '"' && !self.is_at_end() {
if self.peek() == '\n' {
self.line += 1; // les chaînes peuvent être multilignes
}
self.advance();
}
if self.is_at_end() {
// Erreur : chaîne non terminée
return;
}
self.advance(); // Consomme le délimiteur final
self.add_token(TokenType::String, self.source[self.start + 1..self.current - 1].into_iter().collect());
}
fn number(&mut self) {
while is_digit(self.peek()) {
self.advance();
}
if self.peek() == '.' && is_digit(self.peek_next()) {
while is_digit(self.peek()) {
self.advance();
}
}
self.add_token(TokenType::Number, self.source[self.start..self.current].into_iter().collect()); // Il faudra faire un parse sur la chaîne pour connaître la valeur effective
}
fn identifier(&mut self) {
while is_alpha_numeric(self.peek()) {
self.advance();
}
let text: String = self.source[self.start..self.current].into_iter().collect();
match self.keywords.get(&text) {
Some(t) => { self.add_simple_token(*t) },
None => { self.add_token(TokenType::Identifier, text) }
}
}
}

2
src/rlox/token.rs → src/token.rs
View File

@@ -1,4 +1,4 @@
use super::token_type::TokenType;
use crate::token_type::TokenType;
#[derive(Debug)]
pub struct Token {

106
src/token_type.rs Normal file
View File

@@ -0,0 +1,106 @@
#[derive(Debug, Copy, Clone)]
pub enum TokenType {
// Single-character tokens.
LeftParen,
RightParen,
LeftBrace,
RightBrace,
Comma,
Dot,
Minus,
Plus,
Semicolon,
Slash,
Star,
// One or two character tokens.
Bang,
BangEqual,
Equal,
EqualEqual,
Greater,
GreaterEqual,
Less,
LessEqual,
// Literals.
Identifier,
String,
Number,
// Keywords.
And,
Class,
Else,
False,
Fun,
For,
If,
Nil,
Or,
Print,
Return,
Super,
This,
True,
Var,
While,
Eof,
}
impl std::fmt::Display for TokenType {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
match self {
// Single-character tokens.
TokenType::LeftParen => write!(f, "LEFT_PAREN"),
TokenType::RightParen => write!(f, "RIGHT_PAREN"),
TokenType::LeftBrace => write!(f, "LEFT_BRACE"),
TokenType::RightBrace => write!(f, "RIGHT_BRACE"),
TokenType::Comma => write!(f, "COMMA"),
TokenType::Dot => write!(f, "DOT"),
TokenType::Minus => write!(f, "MINUS"),
TokenType::Plus => write!(f, "PLUS"),
TokenType::Semicolon => write!(f, "SEMICOLON"),
TokenType::Slash => write!(f, "SLASH"),
TokenType::Star => write!(f, "STAR"),
// One or two character tokens.
TokenType::Bang => write!(f, "BANG"),
TokenType::BangEqual => write!(f, "BANG_EQUAL"),
TokenType::Equal => write!(f, "EQUAL"),
TokenType::EqualEqual => write!(f, "EQUAL_EQUAL"),
TokenType::Greater => write!(f, "GREATER"),
TokenType::GreaterEqual => write!(f, "GREATER_EQUAL"),
TokenType::Less => write!(f, "LESS"),
TokenType::LessEqual => write!(f, "LESS_EQUAL"),
// Literals.
TokenType::Identifier => write!(f, "IDENTIFIER"),
TokenType::String => write!(f, "STRING"),
TokenType::Number => write!(f, "NUMBER"),
// Keywords.
TokenType::And => write!(f, "AND"),
TokenType::Class => write!(f, "CLASS"),
TokenType::Else => write!(f, "ELSE"),
TokenType::False => write!(f, "FALSE"),
TokenType::Fun => write!(f, "FUN"),
TokenType::For => write!(f, "FOR"),
TokenType::If => write!(f, "IF"),
TokenType::Nil => write!(f, "NIL"),
TokenType::Or => write!(f, "OR"),
TokenType::Print => write!(f, "PRINT"),
TokenType::Return => write!(f, "RETURN"),
TokenType::Super => write!(f, "SUPER"),
TokenType::This => write!(f, "THIS"),
TokenType::True => write!(f, "TRUE"),
TokenType::Var => write!(f, "VAR"),
TokenType::While => write!(f, "WHILE"),
TokenType::Eof => write!(f, "EOF"),
}
}
}