public ForeignAction(int offset, int argumentCount, ForeignContextRef context = null)
{
this.ContextRef = context ?? ForeignContextRef.None;
this.Offset = offset;
this.ArgumentCount = argumentCount;
this.Joint = new Joint();
}
public bool Match(ForeignContextRef reference)
{
if (reference == null)
{
throw new ArgumentNullException("reference");
}
return(reference.UniqueName == this.UniqueName);
}
public Matcher(
string pattern,
SymbolBase outcome = null,
ForeignContextRef context = null,
Condition nextCondition = null,
Disambiguation disambiguation = Disambiguation.Undefined)
: this(
ScanPattern.CreateRegular(pattern),
outcome,
context,
nextCondition,
disambiguation)
{
}
public ForeignContext Resolve(ForeignContextRef reference)
{
var matching = this.Where(c => c.Match(reference));
int count = matching.Count();
switch (count)
{
case 0: return(null);
case 1: return(matching.First());
default:
throw new InvalidOperationException(
"Ambiguous context reference: " + reference.UniqueName);
}
}
public Matcher(
ScanPattern pattern,
SymbolBase outcome = null,
ForeignContextRef context = null,
Condition nextCondition = null,
Disambiguation disambiguation = Disambiguation.Undefined)
{
this.Pattern = pattern;
this.Outcome = outcome;
this.Context = context;
this.NextCondition = nextCondition;
if (disambiguation == Disambiguation.Undefined)
{
this.Disambiguation = pattern.DefaultDisambiguation;
}
else
{
this.Disambiguation = disambiguation;
}
this.Joint = new Joint();
}
public ForeignAction(int argumentCount, ForeignContextRef context = null)
: this(0, argumentCount, context)
{
}
public bool Equals(ForeignContextRef other)
{
return(other != null && UniqueName == other.UniqueName);
}
public bool Provides(ForeignContextRef reference)
{
return(this.Any(c => c.Match(reference)));
}