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 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");
}
