class NameError
Raised when a given name is invalid or undefined.
puts foo
raises the exception:
NameError: undefined local variable or method `foo' for main:Object
Since constant names must start with a capital:
Integer.const_set :answer, 42
raises the exception:
NameError: wrong constant name answer
Public Class Methods
new(msg=nil, name=nil, receiver: nil) → name_error
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Construct a new NameError
exception. If given the name parameter may subsequently be examined using the NameError#name
method. receiver parameter allows to pass object in context of which the error happened. Example:
[1, 2, 3].method(:rject) # NameError with name "rject" and receiver: Array [1, 2, 3].singleton_method(:rject) # NameError with name "rject" and receiver: [1, 2, 3]
static VALUE name_err_initialize(int argc, VALUE *argv, VALUE self) { ID keywords[1]; VALUE values[numberof(keywords)], name, options; argc = rb_scan_args(argc, argv, "*:", NULL, &options); keywords[0] = id_receiver; rb_get_kwargs(options, keywords, 0, numberof(values), values); name = (argc > 1) ? argv[--argc] : Qnil; rb_call_super(argc, argv); name_err_init_attr(self, values[0], name); return self; }
Public Instance Methods
local_variables → array
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Return a list of the local variable names defined where this NameError
exception was raised.
Internal use only.
static VALUE name_err_local_variables(VALUE self) { VALUE vars = rb_attr_get(self, id_local_variables); if (NIL_P(vars)) { VALUE iseqw = rb_attr_get(self, id_iseq); if (!NIL_P(iseqw)) vars = rb_iseqw_local_variables(iseqw); if (NIL_P(vars)) vars = rb_ary_new(); rb_ivar_set(self, id_local_variables, vars); } return vars; }
name → string or nil
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Return the name associated with this NameError
exception.
static VALUE name_err_name(VALUE self) { return rb_attr_get(self, id_name); }
receiver → object
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Return the receiver associated with this NameError
exception.
static VALUE name_err_receiver(VALUE self) { VALUE recv = rb_ivar_lookup(self, id_recv, Qundef); if (!UNDEF_P(recv)) return recv; VALUE mesg = rb_attr_get(self, id_mesg); if (!rb_typeddata_is_kind_of(mesg, &name_err_mesg_data_type)) { rb_raise(rb_eArgError, "no receiver is available"); } name_error_message_t *ptr; TypedData_Get_Struct(mesg, name_error_message_t, &name_err_mesg_data_type, ptr); return ptr->recv; }