add else if, else, and comments

src/parser/if/if.h

@@ -2,17 +2,17 @@
 
 #ifndef iF_H
 #define iF_H
+#include "../../lexer/token.h" // for Token
 #include "../parser.h"
-#include "../../lexer/token.h"  // for Token
 
 typedef struct {
-  DArray * condition;
-  ParsedValue * content;
+  DArray *condition; // NULL for 'else'
+  ParsedValue *content;
 } ParsedConditional;
 
-ParsedValue *parse_if(char *file, DArray *parsed, DArray *tokens, size_t *index);
+ParsedValue *parse_if(char *file, DArray *parsed, DArray *tokens,
+                      size_t *index);
 
 void free_parsed_if(void *ptr);
 
-
 #endif // iF_H