static void yypstack()

in msys2/usr/share/bison/skeletons/glr.c [491:535]
24 lines of code
3 McCabe index (conditional complexity)

static void yypstack (struct yyGLRStack* yystackp, size_t yyk)
  YY_ATTRIBUTE_UNUSED;
static void yypdumpstack (struct yyGLRStack* yystackp)
  YY_ATTRIBUTE_UNUSED;

#else /* !]b4_api_PREFIX[DEBUG */

# define YYDPRINTF(Args)
# define YY_SYMBOL_PRINT(Title, Type, Value, Location)

#endif /* !]b4_api_PREFIX[DEBUG */

/* YYINITDEPTH -- initial size of the parser's stacks.  */
#ifndef YYINITDEPTH
# define YYINITDEPTH ]b4_stack_depth_init[
#endif

/* YYMAXDEPTH -- maximum size the stacks can grow to (effective only
   if the built-in stack extension method is used).

   Do not make this value too large; the results are undefined if
   SIZE_MAX < YYMAXDEPTH * sizeof (GLRStackItem)
   evaluated with infinite-precision integer arithmetic.  */

#ifndef YYMAXDEPTH
# define YYMAXDEPTH ]b4_stack_depth_max[
#endif

/* Minimum number of free items on the stack allowed after an
   allocation.  This is to allow allocation and initialization
   to be completed by functions that call yyexpandGLRStack before the
   stack is expanded, thus insuring that all necessary pointers get
   properly redirected to new data.  */
#define YYHEADROOM 2

#ifndef YYSTACKEXPANDABLE
#  define YYSTACKEXPANDABLE 1
#endif

#if YYSTACKEXPANDABLE
# define YY_RESERVE_GLRSTACK(Yystack)                   \
  do {                                                  \
    if (Yystack->yyspaceLeft < YYHEADROOM)              \
      yyexpandGLRStack (Yystack);                       \
  } while (0)