Raised when the specified key is not found. It is a subclass of IndexError.
h = {"foo" => :bar}
h.fetch("foo")
h.fetch("baz")
Public Class Methods
new(message=nil, receiver: nil, key: nil) → key_error click to toggle source
Construct a new KeyError exception with the given message, receiver and key.
static VALUE
key_err_initialize(int argc, VALUE *argv, VALUE self)
{
VALUE options;
rb_call_super(rb_scan_args(argc, argv, "01:", NULL, &options), argv);
if (!NIL_P(options)) {
ID keywords[2];
VALUE values[numberof(keywords)];
int i;
keywords[0] = id_receiver;
keywords[1] = id_key;
rb_get_kwargs(options, keywords, 0, numberof(values), values);
for (i = 0; i < numberof(values); ++i) {
if (values[i] != Qundef) {
rb_ivar_set(self, keywords[i], values[i]);
}
}
}
return self;
} Public Instance Methods
key → object click to toggle source
Return the key caused this KeyError exception.
static VALUE
key_err_key(VALUE self)
{
VALUE key;
key = rb_ivar_lookup(self, id_key, Qundef);
if (key != Qundef) return key;
rb_raise(rb_eArgError, "no key is available");
}
receiver → object click to toggle source
Return the receiver associated with this KeyError exception.
static VALUE
key_err_receiver(VALUE self)
{
VALUE recv;
recv = rb_ivar_lookup(self, id_receiver, Qundef);
if (recv != Qundef) return recv;
rb_raise(rb_eArgError, "no receiver is available");
}
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