public override Ast.Node Transform(ParseScope Scope)
{
ResultType = Type.Void;
Condition = Condition.Transform(Scope);
Body = Body.Transform(Scope);
return this;
}
public virtual void EmitInstructions(ParseScope DeclarationScope, VirtualMachine.InstructionList Into)
{
if (Instructions != null) throw new InvalidOperationException("Instructions should not be emitted twice");
CleanupPoint = Into.Count;
if (CleanupCall >= 0)
Into[CleanupCall] = CleanupPoint;
Into.AddInstructions("CLEANUP NEXT #Cleanup " + Name, DeclarationScope.Owner.ActualParameterCount, "RETURN POP");
Instructions = Into;
EntryPoint = Into.Count;
Instructions.AddInstructions("MOVE F PUSH #Enter " + Name, "MARK_STACK F");
Body.Emit(Instructions, Ast.OperationDestination.Discard);
//Instructions.AddInstructions("MOVE NEXT R", 0); //If a function has no return statement, it returns 0.
var returnJumpPoint = Instructions.Count;
Instructions.AddInstructions(
"RESTORE_STACK F",
"MOVE POP F",
"RETURN POP");
System.Diagnostics.Debug.Assert(DeclarationScope.Type == ScopeType.Function);
System.Diagnostics.Debug.Assert(DeclarationScope.ReturnJumpSources != null);
foreach (var point in DeclarationScope.ReturnJumpSources)
Instructions[point] = returnJumpPoint;
}
public void ResolveType(ParseScope ActiveScope)
{
if (String.IsNullOrEmpty(DeclaredTypeName))
DeclaredType = Type.Generic;
else
{
DeclaredType = ActiveScope.FindType(DeclaredTypeName);
if (DeclaredType == null) throw new CompileError("Could not find type '" + DeclaredTypeName + "'.");
}
}
public override void EmitInstructions(ParseScope DeclarationScope, VirtualMachine.InstructionList Into)
{
if (Instructions != null) throw new InvalidOperationException("Instructions should not be emitted twice");
CleanupPoint = Into.Count;
if (CleanupCall >= 0)
Into[CleanupCall] = CleanupPoint;
Into.AddInstructions("CLEANUP NEXT #Cleanup when clause for " + Name,
DeclarationScope.Owner.ActualParameterCount, "RETURN POP");
Instructions = Into;
EntryPoint = Into.Count;
Instructions.AddInstructions("MOVE F PUSH #Enter " + Name, "MARK_STACK F");
Body.Emit(Instructions, Ast.OperationDestination.R);
Instructions.AddInstructions(
"RESTORE_STACK F",
"MOVE POP F",
"RETURN POP");
}
public void ResolveTypes(ParseScope ActiveScope)
{
if (String.IsNullOrEmpty(SuperTypename))
Super = null;
else
{
Super = ActiveScope.FindType(SuperTypename);
if (Super == null) throw new CompileError("Could not find type '" + SuperTypename + "'.");
}
if (Super == null)
Members.Insert(0, new Variable
{
Name = "__type",
DeclaredTypeName = "NUMBER",
StorageMethod = VariableStorageMethod.Member
});
var search = Super;
while (search != null)
{
if (Object.ReferenceEquals(search, this)) throw new CompileError("Inheritance loop detected.");
search = search.Super;
}
if (Origin == TypeOrigin.Script)
foreach (var member in Members)
{
if (String.IsNullOrEmpty(member.DeclaredTypeName))
member.DeclaredType = Type.Generic;
else
{
member.DeclaredType = ActiveScope.FindType(member.DeclaredTypeName);
if (member.DeclaredType == null) throw new CompileError("Could not find type '" +
member.DeclaredTypeName + "'.");
}
}
}
public static Ast.Node CreateConversionInvokation(
ParseScope Scope,
Declaration ConversionMacro,
Ast.Node Value)
{
return Ast.StaticInvokation.CreateCorrectInvokationNode(Value.Source, Scope, ConversionMacro,
new List<Ast.Node>(new Ast.Node[] { Value }));
}
public static TypeCompatibilityResult AreTypesCompatible(Type Source, Type Destination, ParseScope Scope)
{
if (Object.ReferenceEquals(Destination, Generic)) return TypeCompatibilityResult.NoConversionRequired;
if (Object.ReferenceEquals(Source, Destination)) return TypeCompatibilityResult.NoConversionRequired;
var super = Source.Super;
while (super != null)
{
if (Object.ReferenceEquals(super, Destination)) return TypeCompatibilityResult.NoConversionRequired;
super = super.Super;
}
var conversionArguments = new List<Ast.Node>();
conversionArguments.Add(new Ast.Identifier(new Token { Type = TokenType.Identifier, Value = "convert" }));
conversionArguments.Add(new Ast.Identifier(new Token { Type = TokenType.Identifier, Value = "0" }) { ResultType = Source });
conversionArguments.Add(new Ast.Identifier(new Token { Type = TokenType.Identifier, Value = "to" }));
conversionArguments.Add(new Ast.Identifier(new Token { Type = TokenType.Identifier, Value = Destination.Name }));
var possibleConversions = Scope.FindAllPossibleMacroMatches(conversionArguments);
Declaration matchingConversion = null;
foreach (var possibleConversion in possibleConversions)
if (Object.ReferenceEquals(Source, possibleConversion.Terms[1].DeclaredType))
{
matchingConversion = possibleConversion;
break;
}
if (matchingConversion != null)
{
if (!Object.ReferenceEquals(matchingConversion.ReturnType, Destination))
throw new CompileError("Conversion function does not return the correct type.",
matchingConversion.Body.Body.Source);
return new TypeCompatibilityResult
{
Compatible = true,
ConversionRequired = true,
ConversionMacro = matchingConversion
};
}
return TypeCompatibilityResult.Incompatible;
}
public void ResolveTypes(ParseScope Scope)
{
try
{
DeclarationScope = Scope.Push(ScopeType.Function);
DeclarationScope.Owner = this;
if (!String.IsNullOrEmpty(ReturnTypeName))
{
ReturnType = Scope.FindType(ReturnTypeName);
if (ReturnType == null)
{
if (Body != null && Body.Body != null)
throw new CompileError("Could not find type '" +
ReturnTypeName + "'.", Body.Body.Source);
else
throw new CompileError("Could not find type '" +
ReturnTypeName + "'.");
}
}
else
ReturnType = EtcScriptLib.Type.Void;
CreateParameterDescriptors();
var header = DescriptiveHeader;
if (Body != null) Body.Name = header;
if (WhenClause != null) WhenClause.Name = header + " : when ...";
}
catch (Exception e)
{
throw new CompileError(e.Message + " while resolving types on " + DescriptiveHeader + "\n" + e.StackTrace);
}
}
public override Ast.Node Transform(ParseScope Scope)
{
List = List.Transform(Scope);
ResultType = List.ResultType;
//Try to find an access macro for this type.
var getterArguments = DummyArguments(Keyword("GET"), Keyword("AT"), Term(Scope.FindType("NUMBER")),
Keyword("FROM"), Term(List.ResultType));
var indexerMacro = Scope.FindAllPossibleMacroMatches(getterArguments).Where(d =>
ExactDummyMatch(d.Terms, getterArguments)).FirstOrDefault();
if (indexerMacro == null)
throw new CompileError("No macro of the form GET AT NUMBER FROM " +
List.ResultType.Name + " found.", Source);
var lengthArguments = DummyArguments(Keyword("LENGTH"), Keyword("OF"), Term(List.ResultType));
var lengthMacro = Scope.FindAllPossibleMacroMatches(lengthArguments).Where(d =>
ExactDummyMatch(d.Terms, lengthArguments)).FirstOrDefault();
if (lengthMacro == null)
throw new CompileError("No macro of the form LENGTH OF " + List.ResultType.Name + " found.", Source);
var nestedScope = Scope.Push(ScopeType.Block);
ResultVariable = nestedScope.NewLocal("__result@" + VariableName, Scope.FindType("LIST"));
ListVariable = nestedScope.NewLocal("__list@" + VariableName, Scope.FindType("LIST"));
TotalVariable = nestedScope.NewLocal("__total@" + VariableName, Scope.FindType("NUMBER"));
CounterVariable = nestedScope.NewLocal("__counter@" + VariableName, Scope.FindType("NUMBER"));
ValueVariable = nestedScope.NewLocal(VariableName, indexerMacro.ReturnType);
Indexer = Ast.StaticInvokation.CreateCorrectInvokationNode(Source, nestedScope, indexerMacro,
new List<Ast.Node>(new Ast.Node[] {
new Ast.Identifier(new Token { Type = TokenType.Identifier, Value = "__counter@"+VariableName }),
new Ast.Identifier(new Token { Type = TokenType.Identifier, Value = "__list@"+VariableName })
})).Transform(nestedScope);
LengthFunc = Ast.StaticInvokation.CreateCorrectInvokationNode(Source, nestedScope, lengthMacro,
new List<Ast.Node>(new Ast.Node[] {
new Ast.Identifier(new Token { Type = TokenType.Identifier, Value = "__list@"+VariableName })
})).Transform(nestedScope);
Condition = Condition.Transform(nestedScope);
if (Condition.ResultType.Name != "BOOLEAN")
throw new CompileError("Condition to where clause must return boolean", Source);
return this;
}
public void Transform(ParseScope DeclarationScope)
{
Body = Body.Transform(DeclarationScope);
}
public ParseScope Push(ScopeType Type)
{
var r = new ParseScope(Type);
r.Parent = this;
r.VariableIndex = (Type == ScopeType.Function ? 0 : this.VariableIndex);
r.EnvironmentContext = this.EnvironmentContext;
return r;
}
public override EtcScriptLib.Ast.Node Transform(ParseScope Scope)
{
var rulebook = Scope.EnvironmentContext.Rules.FindMatchingRulebook(Arguments);
if (rulebook == null)
return null; //Rulebook does not exist... no, this isn't an error!
var arguments = Declaration.GenerateParameterListSyntaxTree(Arguments, rulebook.DeclarationTerms).Members;
var boxedArguments = new List<Ast.Node>(arguments.Select(n =>
{
n = n.Transform(Scope);
if (n.ResultType.Origin != TypeOrigin.Script)
return new Ast.Box(n.Source, n).Transform(Scope);
else
return n;
}));
//This only works because rulebook consider functions take only generics.
return Ast.StaticInvokation.CreateCorrectInvokationNode(Source, Scope, rulebook.ConsiderFunction,
boxedArguments)
.Transform(Scope);
}
public override EtcScriptLib.Ast.Node Transform(ParseScope Scope)
{
DeclarationScope = Scope;
BoxType = Scope.FindType("BOXED");
ResultType = Rulebook.ResultType;
return this;
}
public ParseContext()
{
ActiveScope = new ParseScope(ScopeType.Root) { EnvironmentContext = this };
TopScope = ActiveScope;
}
public void PushNewScope(ScopeType Type)
{
var newScope = new ParseScope(Type) { Parent = ActiveScope, EnvironmentContext = this };
ActiveScope = newScope;
}
public override Ast.Node Transform(ParseScope Scope)
{
ResultType = Type.Void;
Max = Max.Transform(Scope);
var nestedScope = Scope.Push(ScopeType.Block);
TotalVariable = nestedScope.NewLocal("__total@" + VariableName, Scope.FindType("NUMBER"));
Min = Min.Transform(nestedScope);
CounterVariable = nestedScope.NewLocal("__counter@" + VariableName, Scope.FindType("NUMBER"));
ValueVariable = nestedScope.NewLocal(VariableName, Scope.FindType("NUMBER"));
Body = Body.Transform(nestedScope);
return this;
}