d: add push parser support

Support the push-pull directive with the options pull, push and both.
Pull remains the default option.

* data/skeletons/d.m4: Add user aliases for the push parser's return
values: PUSH_MORE, ABORT, ACCEPT.
* data/skeletons/lalr1.d: Add push parser support.
* tests/calc.at: Test it.

1 files changed, 3 insertions, 1 deletions

diff --git a/tests/calc.at b/tests/calc.at
index 7475535d..8dffb6b9 100644
--- a/tests/calc.at
+++ b/tests/calc.at
@@ -540,7 +540,7 @@ m4_define([AT_CALC_MAIN(d)],
   auto l = calcLexer (input);
   auto p = new YYParser (l);]AT_DEBUG_IF([[
   p.setDebugLevel (1);]])[
-  return !p.parse ();
+  return !p.parse();
 }
 ]])
 
@@ -1510,6 +1510,8 @@ AT_CHECK_CALC_LALR1_D([%locations %define parse.lac full %define parse.error det
 
 AT_CHECK_CALC_LALR1_D([%define api.token.constructor %locations %define parse.error custom %define api.value.type union])
 AT_CHECK_CALC_LALR1_D([%define api.token.constructor %locations %define parse.error detailed])
+AT_CHECK_CALC_LALR1_D([%define api.push-pull both])
+AT_CHECK_CALC_LALR1_D([%define parse.trace %define parse.error custom %locations %define api.push-pull both %define parse.lac full])
 
 # ----------------------- #
 # LALR1 Java Calculator.  #