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20 lines
369 B
20 lines
369 B
=proto
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void duk_require_null(duk_context *ctx, int index);
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=stack
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[ ... val! ... ]
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=summary
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<p>Throw an error if the value at <tt>index</tt> is not <tt>null</tt>
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or if the index is invalid.</p>
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<div class="note">
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There is no "get" primitive (<tt>duk_get_null()</tt>) because such a
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function would be a no-op.
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</div>
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=example
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duk_require_null(ctx, -3);
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=tags
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stack
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