/// <summary>
/// Create iteration code for an array
/// </summary>
/// <param name="emitter"></param>
public void CompileArray(Emitter.Emitter emitter)
{
var iterType = Iterable.GetExpressionType(emitter);
// make local variables only visible inside the scope
emitter.CurrentMethod.Scope.EnterSubScope();
var idxVar = emitter.CurrentMethod.Scope.Introduce("int", emitter.ResolveType("int"), Key == null ? null : Key.Data);
var arrVar = emitter.CurrentMethod.Scope.Introduce(iterType, emitter.ResolveType(iterType));
var currType = emitter.GetArrayItemType(iterType);
var currVar = emitter.CurrentMethod.Scope.Introduce(currType, emitter.ResolveType(currType), Item.Data);
// prelude: arr = ..., idx = -1
Iterable.Compile(emitter);
emitter.EmitSaveVariable(arrVar);
emitter.EmitLoadInt(-1);
emitter.EmitSaveVariable(idxVar);
emitter.PlaceLabel(BodyStart);
// increment
emitter.EmitLoadVariable(idxVar);
emitter.EmitLoadInt(1);
emitter.EmitAdd();
emitter.EmitSaveVariable(idxVar);
// loop exit condition
emitter.EmitLoadVariable(idxVar);
emitter.EmitLoadVariable(arrVar);
emitter.EmitLoadArraySize();
emitter.EmitCompareLess();
emitter.EmitBranchFalse(BodyEnd);
// variable: curr = array[idx]
emitter.EmitLoadVariable(arrVar);
emitter.EmitLoadVariable(idxVar);
emitter.EmitLoadIndex(currType);
emitter.EmitSaveVariable(currVar);
// body
var preCurrLoop = emitter.CurrentLoop;
emitter.CurrentLoop = this;
Body.Compile(emitter);
emitter.CurrentLoop = preCurrLoop;
emitter.EmitBranch(BodyStart);
emitter.PlaceLabel(BodyEnd);
emitter.CurrentMethod.Scope.LeaveSubScope();
}
public void CompileArray(Emitter.Emitter emitter)
{
// make sure it's an array
var type = emitter.GetArrayItemType(ExpressionPrefix.GetExpressionType(emitter));
if (type == "")
Error(Resources.errIndexingNotAnArray);
// make sure expression type matches array type
var exprType = Expression.GetExpressionType(emitter);
if (!emitter.TypeIsParent(type, exprType))
Error(String.Format(Resources.errAssignTypeMismatch, exprType, type));
ExpressionPrefix.Compile(emitter);
Index.Compile(emitter);
if (type == "complex")
{
// special case of valuetypes
var typeRef = emitter.ResolveType(type);
emitter.EmitLoadIndexAddress(typeRef);
Expression.Compile(emitter);
emitter.EmitSaveObject(typeRef);
}
else
{
Expression.Compile(emitter);
emitter.EmitSaveIndex(type);
}
}
public override void Compile(Emitter.Emitter emitter)
{
var leftType = Left.GetExpressionType(emitter);
var rightType = Right.GetExpressionType(emitter);
// an array of values
if (rightType == leftType + "[]")
{
Right.Compile(emitter);
Left.Compile(emitter);
if (leftType.IsAnyOf("int", "bool", "float", "complex"))
emitter.EmitBox(emitter.ResolveType(leftType));
var method = typeof(MirelleStdlib.ArrayHelper).GetMethod("Has", new[] { typeof(object), typeof(object) });
emitter.EmitCall(emitter.AssemblyImport(method));
}
// an object has a "has" method that accepts the lefthand expression
else
{
try
{
Expr.IdentifierInvoke("has", Right, Left).Compile(emitter);
return;
}
catch { }
Error(String.Format(Resources.errOperatorTypesMismatch, "in", leftType, rightType));
}
}
public override void Compile(Emitter.Emitter emitter)
{
// declare variables and methods
var tmpVar = emitter.CurrentMethod.Scope.Introduce("dict", emitter.ResolveType("dict"));
var ctor = emitter.AssemblyImport(typeof(MirelleStdlib.Dict).GetConstructor(new Type[] { }));
var set = emitter.FindMethod("dict", "set", "string", "string");
// var tmp = new dict
emitter.EmitNewObj(ctor);
emitter.EmitSaveVariable(tmpVar);
// tmp[key] = value
foreach(var curr in Data)
{
var keyType = curr.Item1.GetExpressionType(emitter);
var valueType = curr.Item2.GetExpressionType(emitter);
if (keyType != "string")
Error(Resources.errDictItemTypeMismatch, curr.Item1.Lexem);
if (valueType != "string")
Error(Resources.errDictItemTypeMismatch, curr.Item2.Lexem);
emitter.EmitLoadVariable(tmpVar);
curr.Item1.Compile(emitter);
curr.Item2.Compile(emitter);
emitter.EmitCall(set);
}
emitter.EmitLoadVariable(tmpVar);
}
public override void Compile(Emitter.Emitter emitter)
{
var args = new[] { Parameters.Count == 1 ? typeof(object) : typeof(IEnumerable<dynamic>), typeof(bool) };
var printMethod = emitter.AssemblyImport(typeof(MirelleStdlib.Printer).GetMethod("Print", args));
if (Parameters.Count == 1)
{
var currType = Parameters[0].GetExpressionType(emitter);
Parameters[0].Compile(emitter);
if (currType.IsAnyOf("int", "bool", "float", "complex"))
emitter.EmitBox(emitter.ResolveType(currType));
}
else
{
var objType = emitter.AssemblyImport(typeof(object));
var arrType = new ArrayType(objType);
var tmpVariable = emitter.CurrentMethod.Scope.Introduce("object[]", arrType);
// load count & create
emitter.EmitLoadInt(Parameters.Count);
emitter.EmitNewArray(objType);
emitter.EmitSaveVariable(tmpVariable);
int idx = 0;
foreach (var curr in Parameters)
{
var currType = curr.GetExpressionType(emitter);
emitter.EmitLoadVariable(tmpVariable);
emitter.EmitLoadInt(idx);
curr.Compile(emitter);
if (currType.IsAnyOf("int", "bool", "float", "complex"))
emitter.EmitBox(emitter.ResolveType(currType));
emitter.EmitSaveIndex("object");
idx++;
}
// return the created array
emitter.EmitLoadVariable(tmpVariable);
}
emitter.EmitLoadBool(PrintLine);
emitter.EmitCall(printMethod);
}
public override void Compile(Emitter.Emitter emitter)
{
var typeName = Values[0].GetExpressionType(emitter);
if (typeName == "null")
Error(Resources.errArrayItemNull, Values[0].Lexem);
if (typeName.IsAnyOf("", "void"))
Error(Resources.errVoidExpression, Values[0].Lexem);
TypeReference type;
try
{
type = emitter.ResolveType(typeName);
}
catch (CompilerException ex)
{
ex.AffixToLexem(Values[0].Lexem);
throw;
}
var tmpVariable = emitter.CurrentMethod.Scope.Introduce(typeName, emitter.ResolveType(typeName + "[]"));
// load count & create
emitter.EmitLoadInt(Values.Count);
emitter.EmitNewArray(type);
emitter.EmitSaveVariable(tmpVariable);
int idx = 0;
foreach (var curr in Values)
{
var currType = curr.GetExpressionType(emitter);
if (currType != typeName)
Error(String.Format(Resources.errArrayTypeMismatch, currType, typeName), curr.Lexem);
emitter.EmitLoadVariable(tmpVariable);
emitter.EmitLoadInt(idx);
curr.Compile(emitter);
emitter.EmitSaveIndex(typeName);
idx++;
}
// return the created array
emitter.EmitLoadVariable(tmpVariable);
}
public override void Compile(Emitter.Emitter emitter)
{
// check variable for redefinition
if (emitter.CurrentMethod.Scope.Exists(Name))
Error(String.Format(Resources.errVariableRedefinition, Name));
// get variable type
var type = Expression.GetExpressionType(emitter);
if (type == "null")
Error(Resources.errVariableDefinedNull);
if (type.IsAnyOf("", "void"))
Error(Resources.errVoidExpression);
// compile expression
Expression.Compile(emitter);
// declare variable in the current scope
var varDecl = emitter.CurrentMethod.Scope.Introduce(type, emitter.ResolveType(type), Name);
// emit save opcode
emitter.EmitSaveVariable(varDecl);
}
/// <summary>
/// Compile an array indexer
/// </summary>
/// <param name="emitter"></param>
private void CompileArray(Emitter.Emitter emitter)
{
// ensure this is an array
var type = emitter.GetArrayItemType(ExpressionPrefix.GetExpressionType(emitter));
if (type == "")
Error(Resources.errIndexingNotAnArray);
// ensure index is integer
if (Index.GetExpressionType(emitter) != "int")
Error(Resources.errIntIndexExpected, Index.Lexem);
ExpressionPrefix.Compile(emitter);
Index.Compile(emitter);
if (type == "complex")
{
// special case of valuetypes
var typeRef = emitter.ResolveType(type);
emitter.EmitLoadIndexAddress(typeRef);
emitter.EmitLoadObject(typeRef);
}
else
emitter.EmitLoadIndex(type);
}
public override void Compile(Emitter.Emitter emitter)
{
// make sure there is an array
var exprType = Expression.GetExpressionType(emitter);
if (!exprType.Contains("[]"))
Error(Resources.errSplatArrayExpected);
// define required variables
var type = emitter.GetArrayItemType(exprType);
var typeRef = emitter.ResolveType(type);
var idx = 0;
var tmpVar = emitter.CurrentMethod.Scope.Introduce(exprType, emitter.ResolveType(exprType));
// compile array
Expression.Compile(emitter);
emitter.EmitSaveVariable(tmpVar);
foreach(var curr in Names)
{
// check for variable redefinition
if (emitter.CurrentMethod.Scope.Exists(curr.Data))
Error(String.Format(Resources.errVariableRedefinition, curr.Data), curr);
var varDecl = emitter.CurrentMethod.Scope.Introduce(type, emitter.ResolveType(type), curr.Data);
var elseLabel = emitter.CreateLabel();
var endLabel = emitter.CreateLabel();
// make sure the array is not a null
emitter.EmitLoadNull();
emitter.EmitLoadVariable(tmpVar);
emitter.EmitCompareEqual();
emitter.EmitBranchTrue(elseLabel);
// make sure there are items in the array
emitter.EmitLoadInt(idx);
emitter.EmitLoadVariable(tmpVar);
emitter.EmitLoadArraySize();
emitter.EmitCompareLess();
emitter.EmitBranchFalse(elseLabel);
// retrieve the current value
emitter.EmitLoadVariable(tmpVar);
emitter.EmitLoadInt(idx);
if(type == "complex")
{
emitter.EmitLoadIndexAddress(typeRef);
emitter.EmitLoadObject(typeRef);
}
else
emitter.EmitLoadIndex(type);
emitter.EmitBranch(endLabel);
// or create a default
emitter.PlaceLabel(elseLabel);
emitter.EmitLoadDefaultValue(type);
// assign the variable
emitter.PlaceLabel(endLabel);
emitter.EmitSaveVariable(varDecl);
idx++;
}
}
/// <summary>
/// Emit code for loading local variables from fields
/// </summary>
/// <param name="list">List of closures</param>
private void LoadClosuredVariables(Dictionary<string, string> list, Emitter.Emitter emitter)
{
foreach (var curr in list)
{
emitter.EmitLoadThis();
// load field
var currField = emitter.FindField(PlannerID, "_" + curr.Key);
emitter.EmitLoadField(currField);
// save into variable
var currVar = emitter.CurrentMethod.Scope.Introduce(curr.Value, emitter.ResolveType(curr.Value), curr.Key);
emitter.EmitSaveVariable(currVar);
}
}
/// <summary>
/// Create iteration code for a range
/// </summary>
/// <param name="emitter"></param>
public void CompileRange(Emitter.Emitter emitter)
{
// make local variables only visible inside the scope
emitter.CurrentMethod.Scope.EnterSubScope();
var idxVar = emitter.CurrentMethod.Scope.Introduce("int", emitter.ResolveType("int"), Key == null ? null : Key.Data);
var rangeVar = emitter.CurrentMethod.Scope.Introduce("range", emitter.ResolveType("range"));
var currVar = emitter.CurrentMethod.Scope.Introduce("int", emitter.ResolveType("int"), Item.Data);
// preface: range = ..., range.reset
Iterable.Compile(emitter);
emitter.EmitSaveVariable(rangeVar);
emitter.EmitLoadVariable(rangeVar);
emitter.EmitCall(emitter.FindMethod("range", "reset"));
// set key if exists
if(Key != null)
{
emitter.EmitLoadInt(-1);
emitter.EmitSaveVariable(idxVar);
}
// range.next == false ? exit
emitter.PlaceLabel(BodyStart);
emitter.EmitLoadVariable(rangeVar);
emitter.EmitCall(emitter.FindMethod("range", "next"));
emitter.EmitLoadBool(false);
emitter.EmitCompareEqual();
emitter.EmitBranchTrue(BodyEnd);
// curr = range.current
emitter.EmitLoadVariable(rangeVar);
emitter.EmitCall(emitter.FindMethod("range", "current"));
emitter.EmitSaveVariable(currVar);
// increment key if exists
if(Key != null)
{
emitter.EmitLoadVariable(idxVar);
emitter.EmitLoadInt(1);
emitter.EmitAdd();
emitter.EmitSaveVariable(idxVar);
}
// body
var preCurrLoop = emitter.CurrentLoop;
emitter.CurrentLoop = this;
Body.Compile(emitter);
emitter.CurrentLoop = preCurrLoop;
emitter.EmitBranch(BodyStart);
emitter.PlaceLabel(BodyEnd);
emitter.CurrentMethod.Scope.LeaveSubScope();
}
/// <summary>
/// Create iteration code for a dictionary
/// </summary>
/// <param name="emitter"></param>
public void CompileDict(Emitter.Emitter emitter)
{
// check if key defined
if (Key == null)
Error(Resources.errDictIterKeyRequired);
// make local variables only visible inside the scope
emitter.CurrentMethod.Scope.EnterSubScope();
var dictVar = emitter.CurrentMethod.Scope.Introduce("dict", emitter.ResolveType("dict"));
var currVar = emitter.CurrentMethod.Scope.Introduce("string[]", emitter.ResolveType("string[]"));
var keyVar = emitter.CurrentMethod.Scope.Introduce("string", emitter.ResolveType("string"), Key.Data);
var itemVar = emitter.CurrentMethod.Scope.Introduce("string", emitter.ResolveType("string"), Item.Data);
// preface: dictVar = ...;
Iterable.Compile(emitter);
emitter.EmitSaveVariable(dictVar);
emitter.EmitLoadVariable(dictVar);
emitter.EmitCall(emitter.FindMethod("dict", "reset"));
// dict.next == false ? exit
emitter.PlaceLabel(BodyStart);
emitter.EmitLoadVariable(dictVar);
emitter.EmitCall(emitter.FindMethod("dict", "next"));
emitter.EmitLoadBool(false);
emitter.EmitCompareEqual();
emitter.EmitBranchTrue(BodyEnd);
// curr = dict.current
emitter.EmitLoadVariable(dictVar);
emitter.EmitCall(emitter.FindMethod("dict", "current"));
emitter.EmitSaveVariable(currVar);
// (key, value) = curr
emitter.EmitLoadVariable(currVar);
emitter.EmitLoadInt(0);
emitter.EmitLoadIndex("string");
emitter.EmitSaveVariable(keyVar);
emitter.EmitLoadVariable(currVar);
emitter.EmitLoadInt(1);
emitter.EmitLoadIndex("string");
emitter.EmitSaveVariable(itemVar);
// body
var preCurrLoop = emitter.CurrentLoop;
emitter.CurrentLoop = this;
Body.Compile(emitter);
emitter.CurrentLoop = preCurrLoop;
emitter.EmitBranch(BodyStart);
emitter.PlaceLabel(BodyEnd);
emitter.CurrentMethod.Scope.LeaveSubScope();
}
public override void Compile(Emitter.Emitter emitter)
{
var fromType = Expression.GetExpressionType(emitter);
var toType = ToType;
var simpleTypes = new[] { "bool", "int", "float", "long", "complex" };
if (emitter.ResolveType(toType) == null)
Error(String.Format(Resources.errTypeNotFound, toType));
// compile the expression itself
Expression.Compile(emitter);
// idiotic case?
if (fromType == toType) return;
if(fromType == "null")
{
if(toType.IsAnyOf(simpleTypes))
Error(String.Format(Resources.errInvalidNullCast, toType));
// no actual casting is required
}
// cast simple types
else if(fromType.IsAnyOf(simpleTypes))
{
if (toType.IsAnyOf(simpleTypes))
{
switch(toType)
{
case "bool": emitter.EmitConvertToBool(); break;
case "int": emitter.EmitConvertToInt(); break;
case "float": emitter.EmitConvertToFloat(); break;
default: throw new NotImplementedException();
}
}
else
Error(String.Format(Resources.errInvalidCast, fromType, toType));
}
else
{
// complex type to simple type: search for a conversion method
if(toType.IsAnyOf(simpleTypes))
{
// to_b, to_f, to_i
string methodName = "to_" + toType[0];
MethodNode converter = null;
try
{
converter = emitter.FindMethod(fromType, methodName);
}
catch
{
Error(String.Format(Resources.errInvalidCast, fromType, toType));
}
// call the method
emitter.EmitCall(converter);
}
else
{
if (fromType.Contains("[]") || toType.Contains("[]"))
Error(Resources.errCastArray);
if(!emitter.TypeCastable(fromType, toType))
Error(String.Format(Resources.errInvalidCast, fromType, toType));
var type = emitter.FindType(toType);
emitter.EmitCast(type.Type);
}
}
}
