[英]Assignment from incompatible pointer type[Wincompatible-pointer-types]
[英]Function pointers in C: warning: assignment from incompatible pointer type [-Wincompatible-pointer-types]
考虑以下私有函数声明:
static void ParseCore(SI_32 num_param,const t_config_param config_param[CONFIG_PARAM_BUFFER_SIZE]);
static void ParseGnss(SI_32 num_param,const t_config_param config_param[CONFIG_PARAM_BUFFER_SIZE]);
static void ParseEaf(SI_32 num_param,const t_config_param config_param[CONFIG_PARAM_BUFFER_SIZE]);
static void ParsePps(SI_32 num_param,const t_config_param config_param[CONFIG_PARAM_BUFFER_SIZE]);
static void ParseImu(SI_32 num_param,const t_config_param config_param[CONFIG_PARAM_BUFFER_SIZE]);
在同一源文件中的另一个函数的定义内,我初始化以下指针:
void (*ParseConfigGeneric)(SI_32, t_config_param*) = NULL;
以下所有作业均获得帖子标题中指示的警告:
ParseConfigGeneric = &ParseCore;
ParseConfigGeneric = &ParseGnss;
ParseConfigGeneric = &ParseEaf;
ParseConfigGeneric = &ParsePps;
ParseConfigGeneric = &ParseImu;
这是GCC的输出:
../src/core/time_mgmt.c: In function ‘ParseConfigFile’:
../src/core/time_mgmt.c:753:32: warning: assignment from incompatible pointer type [-Wincompatible-pointer-types]
ParseConfigGeneric = &ParseCore;
^
../src/core/time_mgmt.c:757:32: warning: assignment from incompatible pointer type [-Wincompatible-pointer-types]
ParseConfigGeneric = &ParseGnss;
^
../src/core/time_mgmt.c:761:32: warning: assignment from incompatible pointer type [-Wincompatible-pointer-types]
ParseConfigGeneric = &ParseEaf;
^
../src/core/time_mgmt.c:765:32: warning: assignment from incompatible pointer type [-Wincompatible-pointer-types]
ParseConfigGeneric = &ParsePps;
^
../src/core/time_mgmt.c:769:32: warning: assignment from incompatible pointer type [-Wincompatible-pointer-types]
ParseConfigGeneric = &ParseImu;
该代码确实可以编译,并且似乎可以正常工作。 我查找了类似的问题,但问题始终是指针类型不同于原始函数的指针,但是在这种情况下,它们全都是void*
并且参数匹配,所以我无法确定问题出在哪里。
调用如下(编译器没有抱怨,我检查了每次都调用了正确的函数):
(*ParseConfigGeneric)(num_param, config_param);
函数和函数指针变量之间第二个参数的类型不同。
在函数中,它是指向const
的指针,但不在函数指针变量中。
类型必须完全相等。
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