private BlockSyntax GenBlock(bool root, int numStatements = -1)
{
if (numStatements == -1)
{
numStatements = Options.BlockStatementCountDist.Sample(Random.Rng);
}
_level++;
ScopeFrame scope = new ScopeFrame();
_scope.Add(scope);
if (root)
{
scope.Variables.AddRange(Parameters);
}
BlockSyntax block = Block(GenStatements());
_scope.RemoveAt(_scope.Count - 1);
_level--;
return(block);
IEnumerable <StatementSyntax> GenStatements()
{
StatementSyntax retStmt = null;
for (int i = 0; i < numStatements; i++)
{
StatementSyntax stmt = GenStatement();
if (stmt is ReturnStatementSyntax)
{
retStmt = stmt;
break;
}
yield return(stmt);
}
if (root && retStmt == null)
{
retStmt = GenReturn();
}
if (Options.EnableChecksumming)
{
foreach (StatementSyntax stmt in GenChecksumming(scope.Variables, _genChecksumSiteId))
{
yield return(stmt);
}
}
if (retStmt != null)
{
yield return(retStmt);
}
}
}
private BlockSyntax GenBlock(bool root, int numStatements = -1)
{
if (numStatements == -1)
{
numStatements = Options.BlockStatementCountDist.Sample(Random.Rng);
}
_level++;
ScopeFrame scope = new ScopeFrame();
_scope.Add(scope);
if (root)
{
scope.Variables.AddRange(Parameters);
}
BlockSyntax block = Block(GenStatements());
_scope.RemoveAt(_scope.Count - 1);
_level--;
return(block);
IEnumerable <StatementSyntax> GenStatements()
{
StatementSyntax retStmt = null;
int numGenerated = 0;
while (true)
{
StatementSyntax stmt = GenStatement(allowReturn: !root);
if (stmt is ReturnStatementSyntax)
{
retStmt = stmt;
break;
}
NumStatements++;
yield return(stmt);
numGenerated++;
if (numGenerated < numStatements)
{
continue;
}
// For first block we ensure we get a minimum amount of statements
if (root && _funcIndex == 0)
{
if (_funcs.Sum(f => f.NumStatements) < Options.ProgramMinStatements)
{
continue;
}
}
break;
}
if (Options.EnableChecksumming)
{
foreach (StatementSyntax stmt in GenChecksumming(scope.Variables, _genChecksumSiteId))
{
yield return(stmt);
}
}
if (root && retStmt == null && ReturnType != null)
{
retStmt = GenReturn();
}
if (retStmt != null)
{
NumStatements++;
yield return(retStmt);
}
}
}