[PATCH 4/4] java: lac: check it

* tests/calc.at: Add tests for LAC in pull and push parsers.
Skip LAC: line from the logs.
* tests/local.at (reportSyntaxError): Output the error message in a
single call, to avoid having the error message on stderr be
interrupted by the debug traces of LAC in getExpectedTokens.
---
 tests/calc.at  | 28 ++++++++++++++++++----------
 tests/local.at | 15 ++++++++-------
 2 files changed, 26 insertions(+), 17 deletions(-)

diff --git a/tests/calc.at b/tests/calc.at
index a96fc98a..a8b9ed67 100644
--- a/tests/calc.at
+++ b/tests/calc.at
@@ -953,7 +953,7 @@ AT_JAVA_IF(
   [AT_PARSER_CHECK([calc $1 input],        0, [m4_ifvaln(m4_quote($3), [$3])], [stderr])])
 AT_LANG_MATCH([c\|c++\|java],
   [AT_GLR_IF([],
-    [AT_CHECK([grep -c -v 'Return for a new token:' stderr],
+    [AT_CHECK([grep -c -v -E 'Return for a new token:|LAC:' stderr],
               [ignore],
               [m4_n([AT_DEBUG_IF([$4], [0])])])])])
 ])
@@ -993,21 +993,24 @@ m4_define([_AT_CHECK_CALC_ERROR],
 # Normalize the observed and expected error messages, depending upon the
 # options.
 # 1. Remove the traces from observed.
-sed '/^Starting/d
+sed '
+/ \$[[0-9$]]* = /d
+/^Cleanup:/d
+/^Discarding/d
 /^Entering/d
-/^Stack/d
+/^Error:/d
+/^LAC:/d
+/^Next/d
+/^Now/d
 /^Reading/d
 /^Reducing/d
 /^Return/d
 /^Shifting/d
+/^Stack/d
+/^Starting/d
 /^state/d
-/^Cleanup:/d
-/^Error:/d
-/^Next/d
-/^Now/d
-/^Discarding/d
-/ \$[[0-9$]]* = /d
-/^yydestructor:/d' stderr >at-stderr
+/^yydestructor:/d
+' stderr >at-stderr
 mv at-stderr stderr
 
 # 2. Create the reference error message.
@@ -1392,6 +1395,7 @@ AT_CHECK_CALC_LALR1_CC([%no-lines %header %locations %define api.location.file "
 
 AT_CHECK_CALC_LALR1_CC([%locations %define parse.lac full %define parse.error verbose])
 AT_CHECK_CALC_LALR1_CC([%locations %define parse.lac full %define parse.error detailed])
+AT_CHECK_CALC_LALR1_CC([%locations %define parse.lac full %define parse.error detailed %define parse.trace])
 
 AT_CHECK_CALC_LALR1_CC([%define parse.error custom])
 AT_CHECK_CALC_LALR1_CC([%define parse.error custom %locations %define api.prefix {calc} %parse-param {semantic_value *result}{int *count}{int *nerrs}])
@@ -1481,6 +1485,10 @@ AT_CHECK_CALC_LALR1_JAVA([%define api.push-pull both %define parse.error detaile
 AT_CHECK_CALC_LALR1_JAVA([%define parse.trace %define parse.error custom %locations %lex-param {InputStream is} %define api.push-pull both])
 AT_CHECK_CALC_LALR1_JAVA([%define parse.trace %define parse.error verbose %locations %lex-param {InputStream is} %define api.push-pull both])
 
+# parse.lac.
+AT_CHECK_CALC_LALR1_JAVA([%define parse.trace %define parse.error custom %locations %define parse.lac full])
+AT_CHECK_CALC_LALR1_JAVA([%define parse.trace %define parse.error custom %locations %define api.push-pull both %define parse.lac full])
+
 
 m4_popdef([AT_CALC_MAIN])
 m4_popdef([AT_CALC_YYLEX])
diff --git a/tests/local.at b/tests/local.at
index b18bdf3b..d9b11f9a 100644
--- a/tests/local.at
+++ b/tests/local.at
@@ -1007,24 +1007,25 @@ m4_define([AT_YYERROR_DEFINE(java)],
 
 ]AT_ERROR_CUSTOM_IF([[
   public void reportSyntaxError(Calc.Context ctx) {
-    System.err.print(]AT_LOCATION_IF([[ctx.getLocation() + ": "
-                     + ]])["syntax error");
+    // Buffer and print the message at the end, to avoid being intertwined
+    // with debug traces from getExpectedTokens.
+    String msg = ]AT_LOCATION_IF([[ctx.getLocation() + ": " + ]])["syntax error";
     {
       Calc.SymbolKind token = ctx.getToken();
       if (token != null)
-        System.err.print(" on token @<:@" + token.getName() + "@:>@");
+        msg += " on token @<:@" + token.getName() + "@:>@";
     }
     {
       Calc.SymbolKind[] arg = new Calc.SymbolKind[ctx.NTOKENS];
       int n = ctx.getExpectedTokens(arg, ctx.NTOKENS);
       if (0 < n) {
-        System.err.print(" (expected:");
+        msg += " (expected:";
         for (int i = 0; i < n; ++i)
-          System.err.print(" @<:@" + arg[i].getName() + "@:>@");
-        System.err.print(")");
+          msg += " @<:@" + arg[i].getName() + "@:>@";
+        msg += ")";
       }
     }
-    System.err.println("");
+    System.err.println(msg);
   }
 ]])
 ])
-- 
2.28.0