version 3.0.1

[bison.git] / data / bison.m4

diff --git a/data/bison.m4 b/data/bison.m4
index 910cdf26270e79a6cc4a0fddcaa9feb5c116f8e4..ca27159c878f4b151840043620a8d42a027973be 100644 (file)
--- a/data/bison.m4
+++ b/data/bison.m4
@@ -702,9 +702,9 @@ m4_define([b4_percent_define_use],
 #   b4_percent_define_get([[foo]])
 m4_define([b4_percent_define_get],
 [b4_percent_define_use([$1])dnl
-m4_ifdef([b4_percent_define(]$1[)],
-         [m4_indir([b4_percent_define(]$1[)])],
-         [$2])])
+b4_percent_define_ifdef_([$1],
+                         [m4_indir([b4_percent_define(]$1[)])],
+                         [$2])])
 
 # b4_percent_define_get_loc(VARIABLE)
 # -----------------------------------
@@ -756,6 +756,19 @@ m4_define([b4_percent_define_get_syncline],
           [m4_indir([b4_percent_define_syncline(]$1[)])],
           [b4_fatal([[$0: undefined %%define variable '%s']], [$1])])])
 
+# b4_percent_define_ifdef_(VARIABLE, IF-TRUE, [IF-FALSE])
+# ------------------------------------------------------
+# If the %define variable VARIABLE is defined, expand IF-TRUE, else expand
+# IF-FALSE.  Don't record usage of VARIABLE.
+#
+# For example:
+#
+#   b4_percent_define_ifdef_([[foo]], [[it's defined]], [[it's undefined]])
+m4_define([b4_percent_define_ifdef_],
+[m4_ifdef([b4_percent_define(]$1[)],
+          [$2],
+          [$3])])
+
 # b4_percent_define_ifdef(VARIABLE, IF-TRUE, [IF-FALSE])
 # ------------------------------------------------------
 # Mimic muscle_percent_define_ifdef in ../src/muscle-tab.h exactly.  That is,
@@ -767,9 +780,9 @@ m4_define([b4_percent_define_get_syncline],
 #
 #   b4_percent_define_ifdef([[foo]], [[it's defined]], [[it's undefined]])
 m4_define([b4_percent_define_ifdef],
-[m4_ifdef([b4_percent_define(]$1[)],
-          [b4_percent_define_use([$1])$2],
-          [$3])])
+[b4_percent_define_ifdef_([$1],
+                         [b4_percent_define_use([$1])$2],
+                         [$3])])
 
 
 ## --------- ##
@@ -801,8 +814,8 @@ m4_define([b4_percent_define_flag_if],
   [b4_fatal([[$0: undefined %%define variable '%s']], [$1])])])
 
 
-# b4_percent_define_default(VARIABLE, DEFAULT)
-# --------------------------------------------
+# b4_percent_define_default(VARIABLE, DEFAULT, [KIND = keyword])
+# --------------------------------------------------------------
 # Mimic muscle_percent_define_default in ../src/muscle-tab.h exactly.  That is,
 # if the %define variable VARIABLE is undefined, set its value to DEFAULT.
 # Don't record this as a Bison usage of VARIABLE as there's no reason to
@@ -812,8 +825,10 @@ m4_define([b4_percent_define_flag_if],
 #
 #   b4_percent_define_default([[foo]], [[default value]])
 m4_define([b4_percent_define_default],
-[m4_ifndef([b4_percent_define(]$1[)],
+[b4_percent_define_ifdef_([$1], [],
            [m4_define([b4_percent_define(]$1[)], [$2])dnl
+            m4_define([b4_percent_define_kind(]$1[)],
+                      [m4_default([$3], [keyword])])dnl
             m4_define([b4_percent_define_loc(]$1[)],
                       [[[[<skeleton default value>:-1.-1]],
                         [[<skeleton default value>:-1.-1]]]])dnl
@@ -834,6 +849,21 @@ m4_define([b4_percent_define_if_define],
 b4_percent_define_if_define_([$1], [$2], $[1], $[2])])
 
 
+# b4_percent_define_check_kind(VARIABLE, KIND, [DIAGNOSTIC = complain])
+# ---------------------------------------------------------------------
+m4_define([b4_percent_define_check_kind],
+[b4_percent_define_ifdef_([$1],
+  [m4_if(b4_percent_define_get_kind([$1]), [$2], [],
+    [b4_error([m4_default([$3], [complain])],
+              b4_percent_define_get_loc([$1]),
+              [m4_case([$2],
+                 [code], [[%%define variable '%s' requires '{...}' values]],
+                 [keyword], [[%%define variable '%s' requires keyword values]],
+                 [string], [[%%define variable '%s' requires '"..."' values]])],
+              [$1])])])dnl
+])
+
+
 # b4_percent_define_check_values(VALUES)
 # --------------------------------------
 # Mimic muscle_percent_define_check_values in ../src/muscle-tab.h exactly
@@ -855,8 +885,9 @@ m4_define([b4_percent_define_check_values],
             [_b4_percent_define_check_values(b4_sublist)])])
 
 m4_define([_b4_percent_define_check_values],
-[m4_ifdef([b4_percent_define(]$1[)],
-  [m4_pushdef([b4_good_value], [0])dnl
+[b4_percent_define_ifdef_([$1],
+  [b4_percent_define_check_kind(]$1[, [keyword], [deprecated])dnl
+   m4_pushdef([b4_good_value], [0])dnl
    m4_if($#, 1, [],
          [m4_foreach([b4_value], m4_dquote(m4_shift($@)),
                      [m4_if(m4_indir([b4_percent_define(]$1[)]), b4_value,
@@ -912,10 +943,6 @@ m4_define([b4_percent_code_ifdef],
 ## Common variables.  ##
 ## ------------------ ##
 
-# Default values for %define.
-# ---------------------------
-# If the api.token.prefix, it is empty.
-m4_percent_define_default([[api.token.prefix]], [[]])
 
 # b4_parse_assert_if([IF-ASSERTIONS-ARE-USED], [IF-NOT])
 # b4_parse_trace_if([IF-DEBUG-TRACES-ARE-ENABLED], [IF-NOT])
@@ -999,7 +1026,14 @@ m4_define_default([b4_location_initial_line],   [1])
 ## Sanity checks.  ##
 ## --------------- ##
 
+# api.location.prefix={...} (Java and C++).
+b4_percent_define_check_kind([api.location.type], [code], [deprecated])
+
+# api.position.prefix={...} (Java).
+b4_percent_define_check_kind([api.position.type], [code], [deprecated])
+
 # api.prefix >< %name-prefix.
+b4_percent_define_check_kind([api.prefix], [code], [deprecated])
 b4_percent_define_ifdef([api.prefix],
 [m4_ifdef([b4_prefix],
 [b4_complain_at(b4_percent_define_get_loc([api.prefix]),
@@ -1007,6 +1041,10 @@ b4_percent_define_ifdef([api.prefix],
                 [%name-prefix],
                 [%define api.prefix])])])
 
+# api.token.prefix={...}
+# Make it a warning for those who used betas of Bison 3.0.
+b4_percent_define_check_kind([api.token.prefix], [code], [deprecated])
+
 # api.value.type >< %union.
 b4_percent_define_ifdef([api.value.type],
 [m4_ifdef([b4_union_members],