luaur-compiler 0.1.3

Luau source-to-bytecode compiler (Rust).
Documentation 
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use crate::records::constant::Constant;
use crate::records::constant_visitor::ConstantVisitor;
use luaur_ast::records::ast_expr::AstExpr;
use luaur_common::records::dense_hash_map::DenseHashMap;

impl<'a> ConstantVisitor<'a> {
    pub fn log_change_dense_hash_map_ast_expr_constant_ast_expr_constant(
        &mut self,
        map: &mut DenseHashMap<*mut AstExpr, Constant>,
        key: *mut AstExpr,
        existing: Option<&Constant>,
    ) {
        if self.expr_change_log.is_null() {
            return;
        }

        let old = match existing {
            Some(existing_value) => Some(*existing_value),
            None => map.find(&key).copied(),
        };

        unsafe {
            (*self.expr_change_log).push(crate::records::expr_constant_change::ExprConstantChange {
                key,
                old_value: old.unwrap_or_default(),
                was_absent: old.is_none(),
            });
        }
    }
}