doc: mfcalc: demonstrate %printer.

[bison.git] / tests / calc.at

diff --git a/tests/calc.at b/tests/calc.at
index 4c2431747b6f60642a79dfb87bdb6ed1becb4de3..c50400836a5ad684ce0443db4643ac877a0aec2f 100644 (file)
--- a/tests/calc.at
+++ b/tests/calc.at
@@ -1,6 +1,6 @@
 # Simple calculator.                         -*- Autotest -*-
 
-# Copyright (C) 2000-2010 Free Software Foundation, Inc.
+# Copyright (C) 2000-2012 Free Software Foundation, Inc.
 
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -122,19 +122,15 @@ int
 ])[
     }
 
-]AT_LOCATION_IF([
-  AT_LOC_FIRST_COLUMN = AT_LOC_LAST_COLUMN;
-  AT_LOC_FIRST_LINE   = AT_LOC_LAST_LINE;
-])[
-
-  /* Skip white space.  */
-  while ((c = get_char (]AT_LEX_ARGS[)) == ' ' || c == '\t')
+  /* Skip current token, then white spaces.  */
+  do
     {
 ]AT_LOCATION_IF(
 [     AT_LOC_FIRST_COLUMN = AT_LOC_LAST_COLUMN;
       AT_LOC_FIRST_LINE   = AT_LOC_LAST_LINE;
 ])[
     }
+  while ((c = get_char (]AT_LEX_ARGS[)) == ' ' || c == '\t');
 
   /* process numbers   */
   if (c == '.' || isdigit (c))
@@ -160,7 +156,7 @@ AT_SKEL_CC_IF(
 [%define global_tokens_and_yystype])[
 %code requires
 {
-]AT_LOCATION_TYPE_IF([
+]AT_LOCATION_TYPE_IF([[
 # include <iostream>
   struct Point
   {
@@ -170,10 +166,24 @@ AT_SKEL_CC_IF(
 
   struct Span
   {
-    Point begin;
-    Point end;
+    Point first;
+    Point last;
   };
-])[
+
+# define YYLLOC_DEFAULT(Current, Rhs, N)                                \
+  do                                                                    \
+    if (N)                                                              \
+      {                                                                 \
+        (Current).first = YYRHSLOC (Rhs, 1).first;                      \
+        (Current).last  = YYRHSLOC (Rhs, N).last;                       \
+      }                                                                 \
+    else                                                                \
+      {                                                                 \
+        (Current).first = (Current).last = YYRHSLOC (Rhs, 0).last;      \
+      }                                                                 \
+  while (false)
+
+]])[
   /* Exercise pre-prologue dependency to %union.  */
   typedef int semantic_value;
 }
@@ -197,6 +207,7 @@ extern FILE *input;]AT_SKEL_CC_IF([[
 
 %code
 {
+#include <assert.h>
 #include <stdlib.h>
 #include <string.h>
 #if HAVE_UNISTD_H
@@ -211,6 +222,7 @@ FILE *input;
 static semantic_value global_result = 0;
 static int global_count = 0;
 static int power (int base, int exponent);
+
 ]AT_SKEL_CC_IF(,
 [/* yyerror receives the location if:
    - %location & %pure & %glr
@@ -229,7 +241,7 @@ int yylex (]AT_LEX_FORMALS[);
    are stored in a union, from which objects with constructors are
    excluded in C++. */
 %initial-action {
-  @$.initialize (0);
+  @$.initialize ();
 }
 ])])[
 
@@ -282,11 +294,11 @@ exp:
   std::ostream&
   operator<< (std::ostream& o, const Span& s)
   {
-    o << s.begin.l << '.' << s.begin.c;
-    if (s.begin.l != s.end.l)
-      o << '-' << s.end.l << '.' << s.end.c - 1;
-    else if (s.begin.c != s.end.c - 1)
-      o << '-' << s.end.c - 1;
+    o << s.first.l << '.' << s.first.c;
+    if (s.first.l != s.last.l)
+      o << '-' << s.last.l << '.' << s.last.c - 1;
+    else if (s.first.c != s.last.c - 1)
+      o << '-' << s.last.c - 1;
     return o;
   }
 ]])
@@ -336,8 +348,7 @@ static int
 power (int base, int exponent)
 {
   int res = 1;
-  if (exponent < 0)
-    exit (3);
+  assert (0 <= exponent);
   for (/* Niente */; exponent; --exponent)
     res *= base;
   return res;
@@ -701,6 +712,7 @@ m4_define([AT_CHECK_CALC_GLR_CC],
 [AT_CHECK_CALC([%language "C++" %glr-parser %defines %locations] $@)])
 
 AT_CHECK_CALC_GLR_CC([])
+AT_CHECK_CALC_GLR_CC([%define location_type Span])
 AT_CHECK_CALC_GLR_CC([%error-verbose %name-prefix "calc" %verbose %yacc])
 
 AT_CHECK_CALC_GLR_CC([%debug])