public void EmitRewriting(SourceBuilder source, SequenceGenerator seqGen, String matchListName, String enumeratorName,
bool fireDebugEvents)
{
source.AppendFrontFormat("case \"{0}\":\n", plainRuleName);
source.AppendFront("{\n");
source.Indent();
source.AppendFront(matchType + " " + matchName + " = (" + matchType + ")" + enumeratorName + ".Current;\n");
String returnParameterDeclarations;
String returnArguments;
String returnAssignments;
String returnParameterDeclarationsAllCall;
String intermediateReturnAssignmentsAllCall;
String returnAssignmentsAllCall;
seqHelper.BuildReturnParameters(seqRule, ReturnVars,
out returnParameterDeclarations, out returnArguments, out returnAssignments,
out returnParameterDeclarationsAllCall, out intermediateReturnAssignmentsAllCall, out returnAssignmentsAllCall);
// start a transaction
if (fireDebugEvents)
{
source.AppendFront("procEnv.Matched(" + matchesName + ", " + matchName + ", " + specialStr + ");\n");
}
if (fireDebugEvents)
{
source.AppendFront("procEnv.Finishing(" + matchesName + ", " + specialStr + ");\n");
}
if (returnParameterDeclarations.Length != 0)
{
source.AppendFront(returnParameterDeclarations + "\n");
}
source.AppendFront(ruleName + ".Modify(procEnv, " + matchName + returnArguments + ");\n");
if (returnAssignments.Length != 0)
{
source.AppendFront(returnAssignments + "\n");
}
source.AppendFront("++procEnv.PerformanceInfo.RewritesPerformed;\n");
if (fireDebugEvents)
{
source.AppendFront("procEnv.Finished(" + matchesName + ", " + specialStr + ");\n");
}
// rule applied, now execute the sequence
seqGen.EmitSequence(seqSeq, source);
source.AppendFront(COMP_HELPER.SetResultVar(seqMulti, COMP_HELPER.GetResultVar(seqSeq)));
source.AppendFront("break;\n");
source.Unindent();
source.AppendFront("}\n");
}
public void Emit(SourceBuilder source, SequenceGenerator seqGen, bool fireDebugEvents)
{
source.AppendFront(COMP_HELPER.SetResultVar(seqFor, "true"));
String parameters = seqHelper.BuildParameters(seqRule, ArgumentExpressions, source);
source.AppendFront(matchesType + " " + matchesName + " = " + ruleName
+ ".Match(procEnv, procEnv.MaxMatches" + parameters + ");\n");
source.AppendFront("procEnv.PerformanceInfo.MatchesFound += " + matchesName + ".Count;\n");
for (int i = 0; i < seqRule.Filters.Count; ++i)
{
seqExprGen.EmitFilterCall(source, (SequenceFilterCallCompiled)seqRule.Filters[i], patternName, matchesName, seqRule.PackagePrefixedName, false);
}
source.AppendFront("if(" + matchesName + ".Count != 0) {\n");
source.Indent();
source.AppendFront(matchesName + " = (" + matchesType + ")" + matchesName + ".Clone();\n");
if (fireDebugEvents)
{
source.AppendFront("procEnv.Finishing(" + matchesName + ", " + specialStr + ");\n");
}
String returnParameterDeclarations;
String returnArguments;
String returnAssignments;
String returnParameterDeclarationsAllCall;
String intermediateReturnAssignmentsAllCall;
String returnAssignmentsAllCall;
seqHelper.BuildReturnParameters(seqRule, ReturnVars,
out returnParameterDeclarations, out returnArguments, out returnAssignments,
out returnParameterDeclarationsAllCall, out intermediateReturnAssignmentsAllCall, out returnAssignmentsAllCall);
// apply the sequence for every match found
String enumeratorName = "enum_" + seqFor.Id;
source.AppendFront("IEnumerator<" + matchType + "> " + enumeratorName + " = " + matchesName + ".GetEnumeratorExact();\n");
source.AppendFront("while(" + enumeratorName + ".MoveNext())\n");
source.AppendFront("{\n");
source.Indent();
source.AppendFront(matchType + " " + matchName + " = " + enumeratorName + ".Current;\n");
source.AppendFront(seqHelper.SetVar(seqFor.Var, matchName));
seqGen.EmitSequence(seqFor.Seq, source);
source.AppendFront(COMP_HELPER.SetResultVar(seqFor, COMP_HELPER.GetResultVar(seqFor) + " & " + COMP_HELPER.GetResultVar(seqFor.Seq)));
source.Unindent();
source.AppendFront("}\n");
source.Unindent();
source.AppendFront("}\n");
}
public void Emit(SourceBuilder source, SequenceGenerator seqGen, bool fireDebugEvents)
{
source.AppendFront(COMP_HELPER.SetResultVar(seqFor, "true"));
seqMatcherGen.EmitMatchingAndCloning(source, "procEnv.MaxMatches");
SequenceRuleCallMatcherGenerator.EmitPreMatchEventFiring(source, matchesName);
seqMatcherGen.EmitFiltering(source);
source.AppendFront("if(" + matchesName + ".Count != 0) {\n");
source.Indent();
if (fireDebugEvents)
{
source.AppendFront("procEnv.Finishing(" + matchesName + ", " + specialStr + ");\n");
}
String returnParameterDeclarations;
String returnArguments;
String returnAssignments;
String returnParameterDeclarationsAllCall;
String intermediateReturnAssignmentsAllCall;
String returnAssignmentsAllCall;
seqHelper.BuildReturnParameters(seqRule, ReturnVars,
out returnParameterDeclarations, out returnArguments, out returnAssignments,
out returnParameterDeclarationsAllCall, out intermediateReturnAssignmentsAllCall, out returnAssignmentsAllCall);
// apply the sequence for every match found
String enumeratorName = "enum_" + seqFor.Id;
source.AppendFront("IEnumerator<" + matchType + "> " + enumeratorName + " = " + matchesName + ".GetEnumeratorExact();\n");
source.AppendFront("while(" + enumeratorName + ".MoveNext())\n");
source.AppendFront("{\n");
source.Indent();
source.AppendFront(matchType + " " + matchName + " = " + enumeratorName + ".Current;\n");
source.AppendFront(seqHelper.SetVar(seqFor.Var, matchName));
seqGen.EmitSequence(seqFor.Seq, source);
source.AppendFront(COMP_HELPER.SetResultVar(seqFor, COMP_HELPER.GetResultVar(seqFor) + " & " + COMP_HELPER.GetResultVar(seqFor.Seq)));
source.Unindent();
source.AppendFront("}\n");
source.Unindent();
source.AppendFront("}\n");
}
public void EmitMatching(SourceBuilder source, SequenceGenerator seqGen)
{
String parameters = seqHelper.BuildParameters(seqRule, ArgumentExpressions, source);
source.AppendFront(matchesType + " " + matchesName + " = " + ruleName
+ ".Match(procEnv, " + (seqRule.SequenceType == SequenceType.RuleCall ? "1" : "procEnv.MaxMatches")
+ parameters + ");\n");
source.AppendFront("procEnv.PerformanceInfo.MatchesFound += " + matchesName + ".Count;\n");
for (int i = 0; i < seqRule.Filters.Count; ++i)
{
seqExprGen.EmitFilterCall(source, (SequenceFilterCallCompiled)seqRule.Filters[i], patternName, matchesName, seqRule.PackagePrefixedName, false);
}
source.AppendFront("if(" + matchesName + ".Count != 0) {\n");
source.Indent();
source.AppendFront(COMP_HELPER.SetResultVar(seqSome, "true"));
source.Unindent();
source.AppendFront("}\n");
}
public void Emit(SourceBuilder source, SequenceGenerator seqGen, bool fireDebugEvents)
{
String parameters = seqHelper.BuildParameters(seqRule, ArgumentExpressions, source);
seqMatcherGen.EmitMatching(source, parameters, "procEnv.MaxMatches");
SequenceRuleCallMatcherGenerator.EmitPreMatchEventFiring(source, matchesName);
seqMatcherGen.EmitFiltering(source);
seqMatcherGen.EmitCloning(source);
source.AppendFront("if(" + matchesName + ".Count == 0) {\n");
source.Indent();
source.AppendFront(COMP_HELPER.SetResultVar(seq, "false"));
source.Unindent();
source.AppendFront("} else {\n");
source.Indent();
source.AppendFront(COMP_HELPER.SetResultVar(seq, "false"));
if (fireDebugEvents)
{
source.AppendFront("procEnv.Finishing(" + matchesName + ", " + specialStr + ");\n");
}
String returnParameterDeclarations;
String returnArguments;
String returnAssignments;
String returnParameterDeclarationsAllCall;
String intermediateReturnAssignmentsAllCall;
String returnAssignmentsAllCall;
seqHelper.BuildReturnParameters(seqRule, ReturnVars,
out returnParameterDeclarations, out returnArguments, out returnAssignments,
out returnParameterDeclarationsAllCall, out intermediateReturnAssignmentsAllCall, out returnAssignmentsAllCall);
// apply the rule and the following sequence for every match found
String enumeratorName = "enum_" + seq.Id;
source.AppendFront("IEnumerator<" + matchType + "> " + enumeratorName + " = " + matchesName + ".GetEnumeratorExact();\n");
source.AppendFront("while(" + enumeratorName + ".MoveNext())\n");
source.AppendFront("{\n");
source.Indent();
source.AppendFront(matchType + " " + matchName + " = " + enumeratorName + ".Current;\n");
source.AppendFront("procEnv.Matched(" + matchesName + ", " + matchName + ", " + specialStr + ");\n");
if (returnParameterDeclarations.Length != 0)
{
source.AppendFront(returnParameterDeclarations + "\n");
}
source.AppendFront(ruleName + ".Modify(procEnv, " + matchName + returnArguments + ");\n");
if (returnAssignments.Length != 0)
{
source.AppendFront(returnAssignments + "\n");
}
source.AppendFront("++procEnv.PerformanceInfo.RewritesPerformed;\n");
if (fireDebugEvents)
{
source.AppendFront("procEnv.Finished(" + matchesName + ", " + specialStr + ");\n");
}
// rule applied, now execute the sequence
seqGen.EmitSequence(seq.Sequence, source);
source.AppendFront(COMP_HELPER.SetResultVar(seq, COMP_HELPER.GetResultVar(seq) + "|" + COMP_HELPER.GetResultVar(seq.Sequence)));
source.Unindent();
source.AppendFront("}\n");
source.Unindent();
source.AppendFront("}\n");
}
public void Emit(SourceBuilder source, SequenceGenerator seqGen, bool fireDebugEvents)
{
String parameterDeclarations = null;
String parameters = null;
if (seqRule.Subgraph != null)
{
parameters = seqHelper.BuildParametersInDeclarations(seqRule, ArgumentExpressions, source, out parameterDeclarations);
}
else
{
parameters = seqHelper.BuildParameters(seqRule, ArgumentExpressions, source);
}
if (seqRule.Subgraph != null)
{
source.AppendFront(parameterDeclarations + "\n");
source.AppendFront("procEnv.SwitchToSubgraph((GRGEN_LIBGR.IGraph)" + seqHelper.GetVar(seqRule.Subgraph) + ");\n");
source.AppendFront("graph = ((GRGEN_LGSP.LGSPActionExecutionEnvironment)procEnv).graph;\n");
}
source.AppendFront(matchesType + " " + matchesName + " = " + ruleName
+ ".Match(procEnv, " + (seqRule.SequenceType == SequenceType.RuleCall ? "1" : "procEnv.MaxMatches")
+ parameters + ");\n");
source.AppendFront("procEnv.PerformanceInfo.MatchesFound += " + matchesName + ".Count;\n");
for (int i = 0; i < seqRule.Filters.Count; ++i)
{
seqExprGen.EmitFilterCall(source, (SequenceFilterCallCompiled)seqRule.Filters[i], patternName, matchesName, seqRule.PackagePrefixedName, false);
}
if (seqRule is SequenceRuleCountAllCall)
{
SequenceRuleCountAllCall seqRuleCountAll = (SequenceRuleCountAllCall)seqRule;
source.AppendFront(seqHelper.SetVar(seqRuleCountAll.CountResult, matchesName + ".Count"));
}
String insufficientMatchesCondition;
if (seqRule is SequenceRuleAllCall &&
((SequenceRuleAllCall)seqRule).ChooseRandom &&
((SequenceRuleAllCall)seqRule).MinSpecified)
{
SequenceRuleAllCall seqRuleAll = (SequenceRuleAllCall)seqRule;
String minMatchesVarName = "minmatchesvar_" + seqRuleAll.Id;
source.AppendFrontFormat("int {0} = (int){1};\n", minMatchesVarName, seqHelper.GetVar(seqRuleAll.MinVarChooseRandom));
insufficientMatchesCondition = matchesName + ".Count < " + minMatchesVarName;
}
else
{
insufficientMatchesCondition = matchesName + ".Count == 0";
}
source.AppendFrontFormat("if({0}) {{\n", insufficientMatchesCondition);
source.Indent();
source.AppendFront(COMP_HELPER.SetResultVar(seqRule, "false"));
source.Unindent();
source.AppendFront("} else {\n");
source.Indent();
source.AppendFront(COMP_HELPER.SetResultVar(seqRule, "true"));
if (fireDebugEvents)
{
source.AppendFront("procEnv.Matched(" + matchesName + ", null, " + specialStr + ");\n");
}
if (fireDebugEvents)
{
source.AppendFront("procEnv.Finishing(" + matchesName + ", " + specialStr + ");\n");
}
SequenceRuleOrRuleAllCallRewritingGenerator rewritingGen = new SequenceRuleOrRuleAllCallRewritingGenerator(this);
if (seqRule.SequenceType == SequenceType.RuleCall)
{
rewritingGen.EmitRewritingRuleCall(source);
}
else if (seqRule.SequenceType == SequenceType.RuleCountAllCall || !((SequenceRuleAllCall)seqRule).ChooseRandom) // seq.SequenceType == SequenceType.RuleAll
{
rewritingGen.EmitRewritingRuleCountAllCallOrRuleAllCallNonRandom(source);
}
else // seq.SequenceType == SequenceType.RuleAll && ((SequenceRuleAll)seqRule).ChooseRandom
{
rewritingGen.EmitRewritingRuleAllCallRandom(source);
}
if (fireDebugEvents)
{
source.AppendFront("procEnv.Finished(" + matchesName + ", " + specialStr + ");\n");
}
source.Unindent();
source.AppendFront("}\n");
if (seqRule.Subgraph != null)
{
source.AppendFront("procEnv.ReturnFromSubgraph();\n");
source.AppendFront("graph = ((GRGEN_LGSP.LGSPActionExecutionEnvironment)procEnv).graph;\n");
}
}
public void Emit(SourceBuilder source, SequenceGenerator seqGen, bool fireDebugEvents)
{
String parameters = seqHelper.BuildParameters(seqRule, ArgumentExpressions, source);
seqMatcherGen.EmitMatching(source, parameters, "procEnv.MaxMatches");
SequenceRuleCallMatcherGenerator.EmitPreMatchEventFiring(source, matchesName);
seqMatcherGen.EmitFiltering(source);
seqMatcherGen.EmitCloning(source);
source.AppendFront("if(" + matchesName + ".Count == 0) {\n");
source.Indent();
source.AppendFront(COMP_HELPER.SetResultVar(seq, "false"));
source.Unindent();
source.AppendFront("} else {\n");
source.Indent();
source.AppendFront(COMP_HELPER.SetResultVar(seq, "true")); // shut up compiler
if (fireDebugEvents)
{
source.AppendFront("procEnv.Finishing(" + matchesName + ", " + specialStr + ");\n");
}
String returnParameterDeclarations;
String returnArguments;
String returnAssignments;
String returnParameterDeclarationsAllCall;
String intermediateReturnAssignmentsAllCall;
String returnAssignmentsAllCall;
seqHelper.BuildReturnParameters(seqRule, ReturnVars,
out returnParameterDeclarations, out returnArguments, out returnAssignments,
out returnParameterDeclarationsAllCall, out intermediateReturnAssignmentsAllCall, out returnAssignmentsAllCall);
// apply the rule and the following sequence for every match found,
// until the first rule and sequence execution succeeded
// rolling back the changes of failing executions until then
String enumeratorName = "enum_" + seq.Id;
String matchesTriedName = "matchesTried_" + seq.Id;
source.AppendFront("int " + matchesTriedName + " = 0;\n");
source.AppendFront("IEnumerator<" + matchType + "> " + enumeratorName + " = " + matchesName + ".GetEnumeratorExact();\n");
source.AppendFront("while(" + enumeratorName + ".MoveNext())\n");
source.AppendFront("{\n");
source.Indent();
source.AppendFront(matchType + " " + matchName + " = " + enumeratorName + ".Current;\n");
source.AppendFront("++" + matchesTriedName + ";\n");
// start a transaction
String transactionIdName = "transID_" + seq.Id;
source.AppendFront("int " + transactionIdName + " = procEnv.TransactionManager.Start();\n");
String oldRewritesPerformedName = "oldRewritesPerformed_" + seq.Id;
source.AppendFront("int " + oldRewritesPerformedName + " = procEnv.PerformanceInfo.RewritesPerformed;\n");
if (fireDebugEvents)
{
source.AppendFront("procEnv.Matched(" + matchesName + ", " + matchName + ", " + specialStr + ");\n");
}
if (returnParameterDeclarations.Length != 0)
{
source.AppendFront(returnParameterDeclarations + "\n");
}
source.AppendFront(ruleName + ".Modify(procEnv, " + matchName + returnArguments + ");\n");
if (returnAssignments.Length != 0)
{
source.AppendFront(returnAssignments + "\n");
}
source.AppendFront("++procEnv.PerformanceInfo.RewritesPerformed;\n");
if (fireDebugEvents)
{
source.AppendFront("procEnv.Finished(" + matchesName + ", " + specialStr + ");\n");
}
// rule applied, now execute the sequence
seqGen.EmitSequence(seq.Seq, source);
// if sequence execution failed, roll the changes back and try the next match of the rule
source.AppendFront("if(!" + COMP_HELPER.GetResultVar(seq.Seq) + ") {\n");
source.Indent();
source.AppendFront("procEnv.TransactionManager.Rollback(" + transactionIdName + ");\n");
source.AppendFront("procEnv.PerformanceInfo.RewritesPerformed = " + oldRewritesPerformedName + ";\n");
source.AppendFront("if(" + matchesTriedName + " < " + matchesName + ".Count) {\n"); // further match available -> try it
source.Indent();
source.AppendFront("continue;\n");
source.Unindent();
source.AppendFront("} else {\n"); // all matches tried, all failed later on -> end in fail
source.Indent();
source.AppendFront(COMP_HELPER.SetResultVar(seq, "false"));
source.AppendFront("break;\n");
source.Unindent();
source.AppendFront("}\n");
source.Unindent();
source.AppendFront("}\n");
// if sequence execution succeeded, commit the changes so far and succeed
source.AppendFront("procEnv.TransactionManager.Commit(" + transactionIdName + ");\n");
source.AppendFront(COMP_HELPER.SetResultVar(seq, "true"));
source.AppendFront("break;\n");
source.Unindent();
source.AppendFront("}\n");
source.Unindent();
source.AppendFront("}\n");
}
public void Emit(SourceBuilder source, SequenceGenerator seqGen, bool fireDebugEvents)
{
String matchListName = "MatchList_" + seqMulti.Id;
source.AppendFrontFormat("List<GRGEN_LIBGR.IMatch> {0} = new List<GRGEN_LIBGR.IMatch>();\n", matchListName);
// emit code for matching all the contained rules
for (int i = 0; i < seqMulti.MultiRulePrefixedSequence.RulePrefixedSequences.Count; ++i)
{
new SequenceMultiSequenceBacktrackRuleGenerator(seqMulti,
seqMulti.MultiRulePrefixedSequence.RulePrefixedSequences[i].Rule,
seqMulti.MultiRulePrefixedSequence.RulePrefixedSequences[i].Sequence,
seqExprGen, seqHelper)
.EmitMatching(source, seqGen, matchListName);
}
// emit code for match class (non-rule-based) filtering
foreach (SequenceFilterCall sequenceFilterCall in seqMulti.MultiRulePrefixedSequence.Filters)
{
seqExprGen.EmitMatchClassFilterCall(source, (SequenceFilterCallCompiled)sequenceFilterCall, matchListName, false);
}
source.AppendFront("if(" + matchListName + ".Count == 0) {\n");
source.Indent();
source.AppendFront(COMP_HELPER.SetResultVar(seqMulti, "false"));
source.Unindent();
source.AppendFront("} else {\n");
source.Indent();
source.AppendFront(COMP_HELPER.SetResultVar(seqMulti, "true")); // shut up compiler
String originalToCloneName = "originalToClone_" + seqMulti.Id;
source.AppendFrontFormat("Dictionary<GRGEN_LIBGR.IMatch, GRGEN_LIBGR.IMatch> {0} = new Dictionary<GRGEN_LIBGR.IMatch, GRGEN_LIBGR.IMatch>();\n", originalToCloneName);
// emit code for cloning the matches objects of the rules
for (int i = 0; i < seqMulti.MultiRulePrefixedSequence.RulePrefixedSequences.Count; ++i)
{
new SequenceMultiSequenceBacktrackRuleGenerator(seqMulti,
seqMulti.MultiRulePrefixedSequence.RulePrefixedSequences[i].Rule,
seqMulti.MultiRulePrefixedSequence.RulePrefixedSequences[i].Sequence,
seqExprGen, seqHelper)
.EmitCloning(source, seqGen, matchListName, originalToCloneName);
}
String originalMatchList = "originalMatchList_" + seqMulti.Id;
source.AppendFrontFormat("List<GRGEN_LIBGR.IMatch> {0} = new List<GRGEN_LIBGR.IMatch>({1});\n", originalMatchList, matchListName);
source.AppendFrontFormat("{0}.Clear();\n", matchListName);
String originalMatch = "originalMatch_" + seqMulti.Id;
source.AppendFrontFormat("foreach(GRGEN_LIBGR.IMatch {0} in {1})\n", originalMatch, originalMatchList);
source.AppendFrontIndentedFormat("{0}.Add({1}[{2}]);", matchListName, originalToCloneName, originalMatch);
// apply the rules and the following sequence for every match found,
// until the first rule and sequence execution succeeded
// rolling back the changes of failing executions until then
String enumeratorName = "enum_" + seqMulti.Id;
String matchesTriedName = "matchesTried_" + seqMulti.Id;
source.AppendFront("int " + matchesTriedName + " = 0;\n");
source.AppendFront("IEnumerator<GRGEN_LIBGR.IMatch> " + enumeratorName + " = " + matchListName + ".GetEnumerator();\n");
source.AppendFront("while(" + enumeratorName + ".MoveNext())\n");
source.AppendFront("{\n");
source.Indent();
source.AppendFront("++" + matchesTriedName + ";\n");
String transactionIdName = "transID_" + seqMulti.Id;
source.AppendFront("int " + transactionIdName + " = procEnv.TransactionManager.Start();\n");
String oldRewritesPerformedName = "oldRewritesPerformed_" + seqMulti.Id;
source.AppendFront("int " + oldRewritesPerformedName + " = procEnv.PerformanceInfo.RewritesPerformed;\n");
source.AppendFront("switch(" + enumeratorName + ".Current.Pattern.PackagePrefixedName)\n");
source.AppendFront("{\n");
source.Indent();
// emit code for rewriting the current match (for each rule, rule fitting to the match is selected by rule name)
// and code for executing the corresponding sequence
for (int i = 0; i < seqMulti.MultiRulePrefixedSequence.RulePrefixedSequences.Count; ++i)
{
new SequenceMultiSequenceBacktrackRuleGenerator(seqMulti,
seqMulti.MultiRulePrefixedSequence.RulePrefixedSequences[i].Rule,
seqMulti.MultiRulePrefixedSequence.RulePrefixedSequences[i].Sequence,
seqExprGen, seqHelper)
.EmitRewriting(source, seqGen, matchListName, enumeratorName, fireDebugEvents);
}
source.AppendFrontFormat("default: throw new Exception(\"Unknown pattern \" + {0}.Current.Pattern.PackagePrefixedName + \" in match!\");", enumeratorName);
source.Unindent();
source.AppendFront("}\n");
// if sequence execution failed, roll the changes back and try the next match
source.AppendFront("if(!" + COMP_HELPER.GetResultVar(seqMulti) + ") {\n");
source.Indent();
source.AppendFront("procEnv.TransactionManager.Rollback(" + transactionIdName + ");\n");
source.AppendFront("procEnv.PerformanceInfo.RewritesPerformed = " + oldRewritesPerformedName + ";\n");
source.AppendFront("if(" + matchesTriedName + " < " + matchListName + ".Count) {\n"); // further match available -> try it
source.Indent();
source.AppendFront("continue;\n");
source.Unindent();
source.AppendFront("} else {\n"); // all matches tried, all failed later on -> end in fail
source.Indent();
source.AppendFront("break;\n");
source.Unindent();
source.AppendFront("}\n");
source.Unindent();
source.AppendFront("}\n");
// if sequence execution succeeded, commit the changes so far and succeed
source.AppendFront("procEnv.TransactionManager.Commit(" + transactionIdName + ");\n");
source.AppendFront("break;\n");
source.Unindent();
source.AppendFront("}\n");
source.Unindent();
source.AppendFront("}\n");
}
public void Emit(SourceBuilder source, SequenceGenerator seqGen, bool fireDebugEvents)
{
String matchListName = "MatchList_" + seqMulti.Id;
source.AppendFrontFormat("List<GRGEN_LIBGR.IMatch> {0} = new List<GRGEN_LIBGR.IMatch>();\n", matchListName);
// emit code for matching all the contained rules
SequenceRuleCallMatcherGenerator[] ruleMatcherGenerators =
new SequenceRuleCallMatcherGenerator[seqMulti.Rules.Sequences.Count];
for (int i = 0; i < seqMulti.Rules.Sequences.Count; ++i)
{
ruleMatcherGenerators[i] = new SequenceRuleCallMatcherGenerator((SequenceRuleCall)seqMulti.Rules.Sequences[i], seqExprGen, seqHelper);
ruleMatcherGenerators[i].EmitMatchingAndCloning(source, "procEnv.MaxMatches");
}
SequenceRuleCallMatcherGenerator.EmitPreMatchEventFiring(source, ruleMatcherGenerators);
// emit code for rule-based filtering
for (int i = 0; i < seqMulti.Rules.Sequences.Count; ++i)
{
ruleMatcherGenerators[i].EmitFiltering(source);
ruleMatcherGenerators[i].EmitAddRange(source, matchListName);
}
// emit code for match class (non-rule-based) filtering
foreach (SequenceFilterCallBase sequenceFilterCall in seqMulti.Rules.Filters)
{
seqExprGen.EmitMatchClassFilterCall(source, sequenceFilterCall, matchListName, false);
}
source.AppendFront("if(" + matchListName + ".Count == 0) {\n");
source.Indent();
source.AppendFront(COMP_HELPER.SetResultVar(seqMulti, "false"));
source.Unindent();
source.AppendFront("} else {\n");
source.Indent();
source.AppendFront(COMP_HELPER.SetResultVar(seqMulti, "true")); // shut up compiler
// apply the rules and the following sequence for every match found,
// until the first rule and sequence execution succeeded
// rolling back the changes of failing executions until then
String enumeratorName = "enum_" + seqMulti.Id;
String matchesTriedName = "matchesTried_" + seqMulti.Id;
source.AppendFront("int " + matchesTriedName + " = 0;\n");
source.AppendFront("IEnumerator<GRGEN_LIBGR.IMatch> " + enumeratorName + " = " + matchListName + ".GetEnumerator();\n");
source.AppendFront("while(" + enumeratorName + ".MoveNext())\n");
source.AppendFront("{\n");
source.Indent();
source.AppendFront("++" + matchesTriedName + ";\n");
String transactionIdName = "transID_" + seqMulti.Id;
source.AppendFront("int " + transactionIdName + " = procEnv.TransactionManager.Start();\n");
String oldRewritesPerformedName = "oldRewritesPerformed_" + seqMulti.Id;
source.AppendFront("int " + oldRewritesPerformedName + " = procEnv.PerformanceInfo.RewritesPerformed;\n");
source.AppendFront("switch(" + enumeratorName + ".Current.Pattern.PackagePrefixedName)\n");
source.AppendFront("{\n");
source.Indent();
// emit code for rewriting the current match (for each rule, rule fitting to the match is selected by rule name)
for (int i = 0; i < seqMulti.Rules.Sequences.Count; ++i)
{
SequenceMultiBacktrackRuleRewritingGenerator ruleRewritingGenerator = new SequenceMultiBacktrackRuleRewritingGenerator(
seqMulti, (SequenceRuleCall)seqMulti.Rules.Sequences[i], seqExprGen, seqHelper);
ruleRewritingGenerator.EmitRewriting(source, seqGen, matchListName, enumeratorName, fireDebugEvents);
}
source.AppendFrontFormat("default: throw new Exception(\"Unknown pattern \" + {0}.Current.Pattern.PackagePrefixedName + \" in match!\");", enumeratorName);
source.Unindent();
source.AppendFront("}\n");
// rule applied, now execute the sequence
seqGen.EmitSequence(seqMulti.Seq, source);
// if sequence execution failed, roll the changes back and try the next match
source.AppendFront("if(!" + COMP_HELPER.GetResultVar(seqMulti.Seq) + ") {\n");
source.Indent();
source.AppendFront("procEnv.TransactionManager.Rollback(" + transactionIdName + ");\n");
source.AppendFront("procEnv.PerformanceInfo.RewritesPerformed = " + oldRewritesPerformedName + ";\n");
source.AppendFront("if(" + matchesTriedName + " < " + matchListName + ".Count) {\n"); // further match available -> try it
source.Indent();
source.AppendFront("continue;\n");
source.Unindent();
source.AppendFront("} else {\n"); // all matches tried, all failed later on -> end in fail
source.Indent();
source.AppendFront(COMP_HELPER.SetResultVar(seqMulti, "false"));
source.AppendFront("break;\n");
source.Unindent();
source.AppendFront("}\n");
source.Unindent();
source.AppendFront("}\n");
// if sequence execution succeeded, commit the changes so far and succeed
source.AppendFront("procEnv.TransactionManager.Commit(" + transactionIdName + ");\n");
source.AppendFront(COMP_HELPER.SetResultVar(seqMulti, "true"));
source.AppendFront("break;\n");
source.Unindent();
source.AppendFront("}\n");
source.Unindent();
source.AppendFront("}\n");
}
