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42 lines
1.4 KiB
42 lines
1.4 KiB
name: duk_to_int
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proto: |
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duk_int_t duk_to_int(duk_context *ctx, duk_int_t 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 <code>index</code> with an Ecmascript
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<a href="http://www.ecma-international.org/ecma-262/5.1/#sec-9.4">ToInteger()</a>
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coerced value. Returns an <code>duk_int_t</code> further coerced from the <code>ToInteger()</code>
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result using the algorithm described in
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<code><a href="#duk_get_int">duk_get_int()</a></code> (this second coercion is not
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reflected in the new stack value). If <code>index</code> is invalid, throws an error.</p>
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<div include="ref-custom-type-coercion.html" />
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<p>If you want the <code>double</code> version of the <code>ToInteger()</code> coerced value,
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use:</p>
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<pre class="c-code">
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double d;
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(void) duk_to_int(ctx, -3);
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d = (double) duk_get_number(ctx, -3);
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</pre>
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<div class="note">
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<code>duk_get_int()</code> int coercion is applied only to the return value, it is not
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reflected on the value stack. For instance, if value stack contains the string
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<code>"Infinity"</code>, the value on the stack will be coerced to the number
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<code>Infinity</code> and <code>DUK_INT_MAX</code> will be returned from the API call.
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</div>
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example: |
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printf("ToInteger() + int coercion: %ld\n", (long) duk_to_int(ctx, -3));
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printf("ToInteger() coercion: %lf\n", (double) duk_get_number(ctx, -3));
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tags:
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- stack
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introduced: 1.0.0
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