source cleanup: remove all custom typedef structs

 - Stick to a single unified way to use structs
 - Make checksrc complain on 'typedef struct {'
 - Allow them in tests, public headers and examples

 - Let MD4_CTX, MD5_CTX, and SHA256_CTX typedefs remain as they actually
   typedef different types/structs depending on build conditions.

Closes #5338

1 files changed, 8 insertions, 6 deletions

diff --git a/include/curl/curl.h b/include/curl/curl.h
index a3da3da86..7b92975c7 100644
--- a/include/curl/curl.h
+++ b/include/curl/curl.h
@@ -2115,8 +2115,8 @@ CURL_EXTERN int curl_strequal(const char *s1, const char *s2);
 CURL_EXTERN int curl_strnequal(const char *s1, const char *s2, size_t n);
 
 /* Mime/form handling support. */
-typedef struct curl_mime_s      curl_mime;      /* Mime context. */
-typedef struct curl_mimepart_s  curl_mimepart;  /* Mime part context. */
+typedef struct curl_mime      curl_mime;      /* Mime context. */
+typedef struct curl_mimepart  curl_mimepart;  /* Mime part context. */
 
 /*
  * NAME curl_mime_init()
@@ -2490,10 +2490,11 @@ struct curl_slist {
  * subsequent attempt to change it will result in a CURLSSLSET_TOO_LATE.
  */
 
-typedef struct {
+struct curl_ssl_backend {
   curl_sslbackend id;
   const char *name;
-} curl_ssl_backend;
+};
+typedef struct curl_ssl_backend curl_ssl_backend;
 
 typedef enum {
   CURLSSLSET_OK = 0,
@@ -2745,7 +2746,7 @@ typedef enum {
    from above. */
 #define CURLVERSION_NOW CURLVERSION_SEVENTH
 
-typedef struct {
+struct curl_version_info_data {
   CURLversion age;          /* age of the returned struct */
   const char *version;      /* LIBCURL_VERSION */
   unsigned int version_num; /* LIBCURL_VERSION_NUM */
@@ -2789,7 +2790,8 @@ typedef struct {
   const char *capath;          /* the built-in default CURLOPT_CAPATH, might
                                   be NULL */
 
-} curl_version_info_data;
+};
+typedef struct curl_version_info_data curl_version_info_data;
 
 #define CURL_VERSION_IPV6         (1<<0)  /* IPv6-enabled */
 #define CURL_VERSION_KERBEROS4    (1<<1)  /* Kerberos V4 auth is supported