backyard-parser 0.1.10

Parse PHP code to AST node.
Documentation 
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use backyard_nodes::{ Location, Node };

use crate::{
  error::ParserError,
  parser::{ LoopArgument, Parser },
  utils::{ match_pattern, Lookup, LookupResult },
};

#[derive(Debug, Clone)]
pub struct TypesParser;

impl TypesParser {
  #[allow(unused_assignments)]
  pub fn test<'arena, 'a>(
    parser: &mut Parser<'arena, 'a>,
    _: &mut LoopArgument
  ) -> Option<std::vec::Vec<LookupResult<'arena>>> {
    if let Some(m) = match_pattern(parser, &[Lookup::OptionalType]) {
      if let Some(types) = m.first() {
        if !types.is_empty() {
          return Some(m);
        }
      }
    }
    None
  }

  pub fn parse<'arena, 'a, 'b>(
    _: &mut Parser<'arena, 'a>,
    mut matched: std::vec::Vec<LookupResult<'arena>>,
    _: Location,
    _: &mut LoopArgument<'arena, 'b>
  ) -> Result<Node<'arena>, ParserError> {
    if let [types] = matched.as_mut_slice() {
      if let Some(types) = types.as_optional_type() {
        return Ok(types);
      }
    }
    Err(ParserError::Internal)
  }
}