private Expr or()
{
Expr expr = and();
while (match(TokenType.OR))
{
Token _operator = previous();
Expr right = and();
expr = new Expr.logicalExpr(expr, _operator, right);
}
return(expr);
}
private Expr and()
{
Expr expr = equality();
while (match(TokenType.AND))
{
Token _operator = previous();
Expr right = ternaryExpression();
expr = new Expr.logicalExpr(expr, _operator, right);
}
return(expr);
}
public object visitLogicalExpr(Expr.logicalExpr logicalExpr)
{
object left = evaluate(logicalExpr.left);
if (logicalExpr._operator.type == TokenType.OR)
{
if (isTruthy(left))
{
return(left);
}
}
else
{
if (!isTruthy(left))
{
return(left);
}
}
return(evaluate(logicalExpr.right));
}
public object visitLogicalExpr(Expr.logicalExpr logicalExpr)
{
resolve(logicalExpr.left);
resolve(logicalExpr.right);
return(null);
}
public string visitLogicalExpr(Expr.logicalExpr logicalExpr)
{
return(parenthesize(logicalExpr._operator.lexeme, new Expr[] { logicalExpr.left, logicalExpr.right }));
}