Shorten `rb_strterm_literal_t` members

internal/parse.h

@@ -23,9 +23,9 @@ struct rb_iseq_struct;          /* in vm_core.h */
 /* structs for managing terminator of string literal and heredocment */
 typedef struct rb_strterm_literal_struct {
     long nest;
-    long func;	    /* STR_FUNC_* (e.g., STR_FUNC_ESCAPE and STR_FUNC_EXPAND) */
+    int func;	    /* STR_FUNC_* (e.g., STR_FUNC_ESCAPE and STR_FUNC_EXPAND) */
-    long paren;	    /* '(' of `%q(...)` */
+    int paren;	    /* '(' of `%q(...)` */
-    long term;	    /* ')' of `%q(...)` */
+    int term;	    /* ')' of `%q(...)` */
 } rb_strterm_literal_t;
 
 typedef struct rb_strterm_heredoc_struct {

parse.y

@@ -8573,9 +8573,9 @@ parser_string_term(struct parser_params *p, int func)
 static enum yytokentype
 parse_string(struct parser_params *p, rb_strterm_literal_t *quote)
 {
-    int func = (int)quote->func;
+    int func = quote->func;
-    int term = (int)quote->term;
+    int term = quote->term;
-    int paren = (int)quote->paren;
+    int paren = quote->paren;
     int c, space = 0;
     rb_encoding *enc = p->enc;
     rb_encoding *base_enc = 0;