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27 lines
736 B
27 lines
736 B
=proto
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double duk_to_number(duk_context *ctx, int index);
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=stack
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[ ... val! ... ] -> [ ... ToNumber(val)! ... ]
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=summary
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<p>Replace the value at <tt>index</tt> with an Ecmascript
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<a href="http://www.ecma-international.org/ecma-262/5.1/#sec-9.3">ToNumber()</a>
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coerced value. Returns the coerced value. If <tt>index</tt> is invalid, throws
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an error.</p>
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<p>Custom type coercion:</p>
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<ul>
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<li>Buffer: <tt>0</tt> for zero-size buffer, <tt>1</tt> otherwise</li>
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<li>Pointer: <tt>0</tt> for <tt>NULL</tt> pointer, <tt>1</tt> otherwise</li>
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</ul>
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=example
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printf("coerced number: %lf\n", duk_to_number(ctx, -3));
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=tags
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stack
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=fixme
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Are the current custom coercions sensible? For instance, should pointer
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coerce to its numeric value?
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