protected void MemorizeReference(ReferenceExp exp)
{
RefParseInfo pi = (RefParseInfo)refParseInfos[exp];
if (pi == null)
{
refParseInfos[exp] = pi = new RefParseInfo();
}
pi.MemorizeReference(reader);
}
protected void MemorizeReference( ReferenceExp exp )
{
RefParseInfo pi = (RefParseInfo)refParseInfos[exp];
if(pi==null)
refParseInfos[exp] = pi = new RefParseInfo();
pi.MemorizeReference(reader);
}
protected virtual void CombineReferenceExp(
ReferenceExp r, Expression body, string combine )
{
if( redefiningRefExps.ContainsKey(r) ) {
// this pattern is currently being redefined.
redefiningRefExps[r] = true;
return; // ignore the value
}
RefParseInfo pi = (RefParseInfo)refParseInfos[r];
if(pi==null) refParseInfos[r] = pi = new RefParseInfo();
if( pi.Combine!=null && combine!=null && pi.Combine!=combine ) {
// error: inconsistent combine method
ReportError( ERR_INCONSISTENT_COMBINE, r.name );
pi.Combine = null;
return;
}
if( combine==null ) {
if( pi.HeadDefined )
// error: multiple heads
ReportError( ERR_MULTIPLE_HEADS, r.name );
pi.HeadDefined = true;
combine = pi.Combine;
} else {
pi.Combine = combine;
}
if( r.exp==null )
r.exp = body;
else {
if(combine=="interleave") r.exp = Builder.CreateInterleave( r.exp, body );
else
if(combine=="choice") r.exp = Builder.CreateChoice( r.exp, body );
else {
// error: invalid combine value
ReportError( ERR_INVALID_COMBINE, combine );
}
}
}
protected virtual void CombineReferenceExp(
ReferenceExp r, Expression body, string combine)
{
if (redefiningRefExps.ContainsKey(r))
{
// this pattern is currently being redefined.
redefiningRefExps[r] = true;
return; // ignore the value
}
RefParseInfo pi = (RefParseInfo)refParseInfos[r];
if (pi == null)
{
refParseInfos[r] = pi = new RefParseInfo();
}
if (pi.Combine != null && combine != null && pi.Combine != combine)
{
// error: inconsistent combine method
ReportError(ERR_INCONSISTENT_COMBINE, r.name);
pi.Combine = null;
return;
}
if (combine == null)
{
if (pi.HeadDefined)
{
// error: multiple heads
ReportError(ERR_MULTIPLE_HEADS, r.name);
}
pi.HeadDefined = true;
combine = pi.Combine;
}
else
{
pi.Combine = combine;
}
if (r.exp == null)
{
r.exp = body;
}
else
{
if (combine == "interleave")
{
r.exp = Builder.CreateInterleave(r.exp, body);
}
else
if (combine == "choice")
{
r.exp = Builder.CreateChoice(r.exp, body);
}
else
{
// error: invalid combine value
ReportError(ERR_INVALID_COMBINE, combine);
}
}
}
