internal override IList <Executable> Resolve(Parser parser)
{
ConstantResolutionState resolutionState = parser.ConstantAndEnumResolutionState[this];
if (resolutionState == ConstantResolutionState.RESOLVED)
{
return(new Executable[0]);
}
if (resolutionState == ConstantResolutionState.RESOLVING)
{
throw new ParserException(this.FirstToken, "The resolution of this enum creates a cycle.");
}
parser.ConstantAndEnumResolutionState[this] = ConstantResolutionState.RESOLVING;
this.Expression = this.Expression.Resolve(parser);
if (this.Expression is IntegerConstant ||
this.Expression is BooleanConstant ||
this.Expression is FloatConstant ||
this.Expression is StringConstant)
{
// that's fine.
}
else
{
throw new ParserException(this.FirstToken, "Invalid value for const. Expression must resolve to a constant at compile time.");
}
parser.ConstantAndEnumResolutionState[this] = ConstantResolutionState.RESOLVED;
return(new Executable[0]);
}
internal override Expression Resolve(ParserContext parser)
{
ConstantResolutionState resolutionState = parser.ConstantAndEnumResolutionState[this.EnumDefinition];
if (resolutionState != ConstantResolutionState.RESOLVED)
{
this.EnumDefinition.Resolve(parser);
}
if (this.EnumDefinition.IntValue.ContainsKey(this.Field))
{
return(new IntegerConstant(this.FirstToken, this.EnumDefinition.IntValue[this.Field], this.Owner));
}
throw new ParserException(this.FieldToken, "The enum '" + this.EnumDefinition.Name + "' does not contain a definition for '" + this.Field + "'");
}
internal override void Resolve(Parser parser)
{
ConstantResolutionState resolutionState = parser.ConstantAndEnumResolutionState[this];
if (resolutionState == ConstantResolutionState.RESOLVED)
{
return;
}
if (resolutionState == ConstantResolutionState.RESOLVING)
{
throw new ParserException(this.FirstToken, "The resolution of this enum creates a cycle.");
}
parser.ConstantAndEnumResolutionState[this] = ConstantResolutionState.RESOLVING;
this.Expression = this.Expression.Resolve(parser);
if (!(this.Expression is IConstantValue))
{
throw new ParserException(this.FirstToken, "Invalid value for const. Expression must resolve to a constant at compile time.");
}
parser.ConstantAndEnumResolutionState[this] = ConstantResolutionState.RESOLVED;
}
internal override Expression Resolve(Parser parser)
{
this.Root = this.Root.Resolve(parser);
string step = this.StepToken.Value;
if (this.Root is EnumReference)
{
EnumDefinition enumDef = ((EnumReference)this.Root).EnumDefinition;
ConstantResolutionState resolutionState = parser.ConstantAndEnumResolutionState[enumDef];
if (resolutionState != ConstantResolutionState.RESOLVED)
{
enumDef.Resolve(parser);
}
switch (step)
{
case "length":
return(new IntegerConstant(this.FirstToken, enumDef.IntValue.Count, this.Owner));
case "max":
return(new SpecialEntity.EnumMaxFunction(this.FirstToken, enumDef, this.Owner));
case "values":
return(new SpecialEntity.EnumValuesFunction(this.FirstToken, enumDef, this.Owner));
}
if (enumDef.IntValue.ContainsKey(step))
{
return(new IntegerConstant(this.FirstToken, enumDef.IntValue[step], this.Owner));
}
else
{
throw new ParserException(this.StepToken, "The enum '" + enumDef.Name + "' does not contain a definition for '" + step + "'");
}
}
if (this.Root is BaseKeyword)
{
return(new BaseMethodReference(this.Root.FirstToken, this.DotToken, this.StepToken, this.Owner).Resolve(parser));
}
if (this.Root is StringConstant)
{
if (step == "join")
{
throw new ParserException(this.StepToken,
"There is no join method on strings. Did you mean to do list.join(string) instead?");
}
else if (step == "size")
{
throw new ParserException(this.StepToken, "String size is indicated by string.length.");
}
else if (step == "length")
{
int length = ((StringConstant)this.Root).Value.Length;
return(new IntegerConstant(this.FirstToken, length, this.Owner));
}
}
return(this);
}
internal override void Resolve(ParserContext parser)
{
ConstantResolutionState resolutionState = parser.ConstantAndEnumResolutionState[this];
if (resolutionState == ConstantResolutionState.RESOLVED)
{
return;
}
if (resolutionState == ConstantResolutionState.RESOLVING)
{
throw new ParserException(this, "The resolution of this enum creates a cycle.");
}
parser.ConstantAndEnumResolutionState[this] = ConstantResolutionState.RESOLVING;
HashSet <int> consumed = new HashSet <int>();
for (int i = 0; i < this.Items.Length; ++i)
{
string itemName = this.Items[i].Value;
if (itemName == "length")
{
throw new ParserException(this.Items[i], "The name 'length' is not allowed as an enum value as it is a reserved field. In general, enum members should be in ALL CAPS anyway.");
}
if (this.IntValue.ContainsKey(itemName))
{
throw new ParserException(this.Items[i], "Duplicate item in same enum. ");
}
this.IntValue[itemName] = -1;
if (this.Values[i] != null)
{
IntegerConstant ic = this.Values[i].Resolve(parser) as IntegerConstant;
if (ic == null)
{
throw new ParserException(this.Values[i], "Enum values must be integers or left blank.");
}
this.Values[i] = ic;
if (consumed.Contains(ic.Value))
{
throw new ParserException(this.Values[i], "This integer value has already been used in the same enum.");
}
consumed.Add(ic.Value);
this.IntValue[itemName] = ic.Value;
}
}
parser.ConstantAndEnumResolutionState[this] = ConstantResolutionState.RESOLVED;
int next = 0;
for (int i = 0; i < this.Items.Length; ++i)
{
if (this.Values[i] == null)
{
while (consumed.Contains(next))
{
++next;
}
this.IntValue[this.Items[i].Value] = next;
consumed.Add(next);
}
}
}