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26 lines
844 B
26 lines
844 B
=proto
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void duk_set_top(duk_context *ctx, int index);
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=stack
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[ ...! ] -> [ ...! ]
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=summary
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<p>Set stack top (stack size) to match the argument <code>index</code>,
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normalizing negative index values. If the value stack shrinks,
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values above the new stack top are dropped; if the value stack grows,
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<code>undefined</code> values are pushed to the new stack slots.</p>
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<p>Negative index values are interpreted relative to the current
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stack top as in other API calls. For example, index -1 would
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decrease the stack top by one.</p>
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=example
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/* Assume stack is empty initially. */
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duk_push_int(ctx, 123); /* -> top=1, stack: [ 123 ] */
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duk_set_top(ctx, 3); /* -> top=3, stack: [ 123 undefined undefined ] */
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duk_set_top(ctx, -1); /* -> top=2, stack: [ 123 undefined ] */
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duk_set_top(ctx, 0); /* -> top=0, stack: [ ] */
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=tags
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stack
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