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name: duk_is_error
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proto: |
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duk_bool_t duk_is_error(duk_context *ctx, duk_idx_t index);
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stack: |
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[ ... val! ... ]
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summary: |
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<p>Returns 1 if value at <code>index</code> inherits from <code>Error</code>,
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otherwise returns 0. If <code>index</code> is invalid, also returns 0.</p>
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example: |
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if (duk_is_error(ctx, -3)) {
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/* Inherits from Error, attempt to print stack trace */
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duk_get_prop_string(ctx, -3, "stack");
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printf("%s\n", duk_safe_to_string(ctx, -1));
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duk_pop(ctx);
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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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