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name: duk_require_stack_top
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proto: |
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void duk_require_stack_top(duk_context *ctx, duk_idx_t top);
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summary: |
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<p>Like <code><a href="#duk_check_stack_top">duk_check_stack_top()</a></code>
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but an error is thrown if the value stack needs to be reallocated and that
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reallocation fails.</p>
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<p>As a general rule, callers should use this function to reserve more
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stack space. If value stack cannot be extended, there is almost never a
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useful recovery strategy except to throw an error and unwind.</p>
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example: |
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duk_require_stack_top(ctx, 100);
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printf("value stack guaranteed up to index 99\n");
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tags:
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- stack
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seealso:
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- duk_check_stack_top
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introduced: 1.0.0
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