class KeyError
Raised when the specified key is not found. It is a subclass of IndexError
.
h = {"foo" => :bar} h.fetch("foo") #=> :bar h.fetch("baz") #=> KeyError: key not found: "baz"
Public Class Methods
new(message=nil, receiver: nil, key: nil) → key_error
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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 (!UNDEF_P(values[i])) { rb_ivar_set(self, keywords[i], values[i]); } } } return self; }
Public Instance Methods
key → object
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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 (!UNDEF_P(key)) return key; rb_raise(rb_eArgError, "no key is available"); }
receiver → object
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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 (!UNDEF_P(recv)) return recv; rb_raise(rb_eArgError, "no receiver is available"); }