luaur-ast 0.1.0

Lexer, parser, and AST for Luau (faithful Rust port).
Documentation 
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use crate::records::allocator::Allocator;
use crate::records::ast_expr::AstExpr;
use crate::records::ast_stat::AstStat;
use crate::records::ast_stat_block::AstStatBlock;
use crate::records::ast_stat_repeat::AstStatRepeat;
use crate::records::cst_stat_repeat::CstStatRepeat;
use crate::records::lexeme::Type;
use crate::records::location::Location;
use crate::records::match_lexeme::MatchLexeme;
use crate::records::parser::Parser;
use crate::records::position::Position;

impl Parser {
    pub fn parse_repeat(&mut self) -> *mut AstStat {
        let start = self.lexer.current().location;

        let match_repeat = *self.lexer.current();
        self.next_lexeme(); // repeat

        let locals_begin = self.save_locals();

        unsafe {
            (*self.function_stack.last_mut().unwrap()).loop_depth += 1;
        }

        let body = self.parse_block_no_scope();

        unsafe {
            (*self.function_stack.last_mut().unwrap()).loop_depth -= 1;
        }

        let has_until = self
            .expect_match_end_and_consume(Type::ReservedUntil, &MatchLexeme::new(&match_repeat));
        unsafe {
            (*body).has_end = has_until;
        }
        let until_position = if has_until {
            self.lexer.previous_location().begin
        } else {
            Position::missing()
        };

        let cond = self.parse_expr_i32(0);

        self.restore_locals(locals_begin);

        let node = unsafe {
            (*self.allocator).alloc(AstStatRepeat::new(
                Location::new(start.begin, unsafe { (*cond).base.location }.end),
                cond,
                body,
                has_until,
            ))
        };

        if self.options.store_cst_data {
            let cst_node = unsafe { (*self.allocator).alloc(CstStatRepeat::new(until_position)) };
            self.cst_node_map.try_insert(
                node as *mut crate::records::ast_node::AstNode,
                cst_node as *mut crate::records::cst_node::CstNode,
            );
        }

        node as *mut AstStat
    }
}