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Description: Replace the HashSets with LinkedHashSets to make the generated parsers reproducible
Author: Emmanuel Bourg <ebourg@apache.org>
Forwarded: no
--- a/tool/src/main/antlr3/org/antlr/grammar/v3/DefineGrammarItemsWalker.g
+++ b/tool/src/main/antlr3/org/antlr/grammar/v3/DefineGrammarItemsWalker.g
@@ -45,6 +45,7 @@
package org.antlr.grammar.v3;
import org.antlr.tool.*;
import java.util.HashSet;
+import java.util.LinkedHashSet;
import java.util.Set;
}
@@ -279,7 +280,7 @@
throwsSpec returns [HashSet<String> exceptions]
@init
{
- $exceptions = new HashSet<String>();
+ $exceptions = new LinkedHashSet<String>();
}
: ^('throws' (ID {$exceptions.add($ID.text);})+ )
;
@@ -556,7 +557,7 @@
if ( state.backtracking == 0 )
{
if ( grammar.buildAST() )
- currentRewriteRule.rewriteRefsDeep = new HashSet<GrammarAST>();
+ currentRewriteRule.rewriteRefsDeep = new LinkedHashSet<GrammarAST>();
}
}
: ^( REWRITES
@@ -582,8 +583,8 @@
{
// don't do if guessing
currentRewriteBlock=$start; // pts to BLOCK node
- currentRewriteBlock.rewriteRefsShallow = new HashSet<GrammarAST>();
- currentRewriteBlock.rewriteRefsDeep = new HashSet<GrammarAST>();
+ currentRewriteBlock.rewriteRefsShallow = new LinkedHashSet<GrammarAST>();
+ currentRewriteBlock.rewriteRefsDeep = new LinkedHashSet<GrammarAST>();
}
}
: ^( BLOCK rewrite_alternative EOB )
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