backyard_parser/
lib.rs

1mod internal;
2mod parser;
3mod utils;
4pub mod error;
5
6use backyard_lexer::{ lex, lex_eval, error::LexError, token::Token };
7use backyard_nodes::{ Location, Node, ProgramNode, RangeLocation };
8use bumpalo::Bump;
9use error::ParserError;
10use parser::{ LocationHelper, LoopArgument, Parser };
11
12pub fn parse<'arena>(arena: &'arena Bump, input: &str) -> Result<Node<'arena>, ParserError> {
13  let tokens = lex(arena, input);
14  parse_base(arena, &tokens)
15}
16
17pub fn parse_eval<'arena>(arena: &'arena Bump, input: &str) -> Result<Node<'arena>, ParserError> {
18  let tokens = lex_eval(arena, input);
19  parse_base(arena, &tokens)
20}
21
22pub fn parse_base<'arena>(
23  arena: &'arena Bump,
24  tokens: &Result<bumpalo::collections::Vec<'arena, Token>, LexError>
25) -> Result<Node<'arena>, ParserError> {
26  match tokens {
27    Ok(tokens) => {
28      if tokens.is_empty() {
29        return Err(ParserError::Eof);
30      }
31      let mut parser = Parser::new(arena, tokens);
32      Ok(
33        ProgramNode::loc(
34          parser.get_children(&mut LoopArgument::default(arena, "main"))?,
35          Some(RangeLocation {
36            start: Location { line: 1, column: 0, offset: 0 },
37            end: tokens.last().unwrap().get_location().unwrap(),
38          })
39        )
40      )
41    }
42    Err(err) => Err(ParserError::LexError(err.to_owned())),
43  }
44}
backyard_parser/lib.rs

backyard_parser/
lib.rs
