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=proto
int duk_push_error_object(duk_context *ctx, int err_code, const char *fmt, ...);
=stack
[ ... ] -> [ ... err! ]
=summary
<p>Create a new error object and push it to the value stack (the error is not thrown).
Returns non-negative index (relative to stack bottom) of the pushed error object.</p>
<p>The <tt>message</tt> property of the error object will be set to a <tt>sprintf</tt>-formatted
string using <tt>fmt</tt> and the remaining arguments. The (custom) <tt>code</tt> property
will be set to <tt>err_code</tt>. The internal prototype for the created error object is chosen
based on <tt>err_code</tt>. For instance, <tt>DUK_ERR_RANGE_ERROR</tt> causes the built-in
<tt>RangeError</tt> prototype to be used.</p>
=example
int err_idx;
err_idx = duk_push_error_object(ctx, DUK_ERR_TYPE_ERROR, "invalid argument value: %d", arg_value);
=tags
stack
object
error