feat(tazjin/rlox): Wire up parser to the REPL
Change-Id: I940448c63ce105d53a0f281b6320ffb01378f207 Reviewed-on: https://cl.tvl.fyi/c/depot/+/2235 Reviewed-by: tazjin <mail@tazj.in> Tested-by: BuildkiteCI
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2 changed files with 21 additions and 7 deletions
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@ -1,4 +1,5 @@
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use crate::errors::{report, Error};
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use crate::parser;
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use crate::scanner::{self, Token};
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// Run some Lox code and print it to stdout
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@ -6,12 +7,19 @@ pub fn run(code: &str) {
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let chars: Vec<char> = code.chars().collect();
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match scanner::scan(&chars) {
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Ok(tokens) => print_tokens(tokens),
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Ok(tokens) => {
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print_tokens(&tokens);
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match parser::parse(tokens) {
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Ok(expr) => println!("Expression:\n{:?}", expr),
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Err(error) => report_errors(vec![error]),
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}
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}
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Err(errors) => report_errors(errors),
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}
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}
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fn print_tokens<'a>(tokens: Vec<Token<'a>>) {
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fn print_tokens<'a>(tokens: &Vec<Token<'a>>) {
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println!("Tokens:");
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for token in tokens {
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println!("{:?}", token);
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}
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@ -11,17 +11,17 @@ use crate::scanner::{Token, TokenKind};
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// AST
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#[derive(Debug)]
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struct Binary<'a> {
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pub struct Binary<'a> {
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left: Box<Expr<'a>>,
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operator: Token<'a>,
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right: Box<Expr<'a>>,
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}
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#[derive(Debug)]
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struct Grouping<'a>(Box<Expr<'a>>);
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pub struct Grouping<'a>(Box<Expr<'a>>);
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#[derive(Debug)]
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enum Literal {
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pub enum Literal {
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Boolean(bool),
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Number(f64),
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String(String),
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@ -29,13 +29,13 @@ enum Literal {
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}
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#[derive(Debug)]
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struct Unary<'a> {
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pub struct Unary<'a> {
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operator: Token<'a>,
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right: Box<Expr<'a>>,
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}
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#[derive(Debug)]
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enum Expr<'a> {
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pub enum Expr<'a> {
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Binary(Binary<'a>),
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Grouping(Grouping<'a>),
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Literal(Literal),
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@ -200,3 +200,9 @@ impl<'a> Parser<'a> {
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return Ok(expr);
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}
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}
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pub fn parse<'a>(tokens: Vec<Token<'a>>) -> ExprResult<'a> {
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let mut parser = Parser { tokens, current: 0 };
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parser.expression()
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}
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