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Mention that arg_info[-1] holds the return info

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I lost some time trying to know how to find the returned type.
It's not that obvious it is stored in the _argument_ information array.

For the sake of Internet, here is the full code checking that a function _has_ a returned type:

```c
zend_function *function = /* e.g. fci_cache->function_handler */;

if (!(function->op_array.fn_flags & ZEND_ACC_HAS_RETURN_TYPE)) {
    php_printf("no return type\n");
} else {
    php_printf("has a return type\n");
    php_printf("return type = %s\n", zend_get_type_by_const(ZEND_TYPE_CODE(function->common.arg_info[-1].type)));
}
```
This commit is contained in:
Ivan Enderlin 2019-09-02 13:32:40 +02:00 • committed by Nikita Popov
parent fc4e73b383
commit dce8d19fc1
1 changed files with 1 additions and 1 deletions
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2
Zend/zend_compile.h
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@ -483,7 +483,7 @@ union _zend_function {
zend_function *prototype;
uint32_t num_args;
uint32_t required_num_args;
zend_arg_info *arg_info;
zend_arg_info *arg_info; /* index -1 represents the return value info, if any */
} common;
zend_op_array op_array;