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name: duk_get_error_code
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proto: |
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duk_errcode_t duk_get_error_code(duk_context *ctx, duk_idx_t idx);
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stack: |
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[ ... val! ... ]
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summary: |
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<p>Map the value at <code>idx</code> to the error codes <code>DUK_ERR_xxx</code>
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based on which <code>Error</code> subclass the value inherits from. For example,
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if the value at the stack top is an user-defined error which inherits from
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<code>ReferenceError</code>, the return value will be <code>DUK_ERR_REFERENCE_ERROR</code>.
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If the value inherits from <code>Error</code> but doesn't inherit from any of
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the standard subclasses (EvalError, RangeError, ReferenceError, SyntaxError,
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TypeError, URIError) <code>DUK_ERR_ERROR</code> is returned.
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If the value is not an object, does not inherit from <code>Error</code>, or
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<code>idx</code> is invalid, returns 0 (= <code>DUK_ERR_NONE</code>).</p>
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example: |
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if (duk_get_error_code(ctx, -3) == DUK_ERR_URI_ERROR) {
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printf("Invalid URI\n");
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}
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tags:
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- stack
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- error
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introduced: 1.1.0
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