public static Block createElementInitializerInternal(TYPE type, Expression indexer, int level, List <Expression> nonConstantDimensions, bool skipFirstLevel, SourceContext sourceContext)
{
// Generates internal part of array initializer:
// either object constructor or, again, array initializer.
// Check if the type is ARRAY.
if (!(type is ARRAY_TYPE) && !(type is OBJECT_TYPE))
{
return(null);
}
if (type is ARRAY_TYPE)
{
EXPRESSION_LIST declaredDimensions = ((ARRAY_TYPE)type).dimensions;
int Rank = declaredDimensions.Length;
List <Expression> dimensions = new List <Expression>();
// Check if all dimensions are constants or there is an expression available.
for (int i = 0, n = Rank; i < n; i++)
{
if (declaredDimensions[i] == null || declaredDimensions[i].calculate() == null)
{
if (nonConstantDimensions == null)
{
return(null);
}
if (nonConstantDimensions.Count > 0)
{
dimensions.Add(nonConstantDimensions[0]);
nonConstantDimensions.RemoveAt(0);
}
else
{
ERROR.MissingParameters(Rank, type.sourceContext);
return(null);
}
}
else
{
long d = (long)declaredDimensions[i].calculate();
Literal dim = new Literal((int)d, SystemTypes.Int32);
dimensions.Add(dim);
}
}
Block block = new Block(new StatementList());
// Generate array initializer:
// x = new object[n];
if (skipFirstLevel && level == 0)
{
goto Bypass;
}
AssignmentStatement array_initializer = new AssignmentStatement();
array_initializer.NodeType = NodeType.AssignmentStatement;
array_initializer.Operator = NodeType.Nop; // this means "normal" assignment, but not += etc.
// Generate 'new object[n]'
ConstructArray array_construct = new ConstructArray();
Node elem_type = ((ARRAY_TYPE)type).base_type.convert();
if (elem_type is ArrayTypeExpression)
{
ArrayTypeExpression arr_type = (elem_type.Clone()) as ArrayTypeExpression;
// for ( int i=0, n=arr_type.Rank; i<n; i++ )
// arr_type.Sizes[i] = -1;
elem_type = arr_type;
}
array_construct.ElementType = (TypeNode)elem_type;
array_construct.Rank = Rank;
array_construct.SourceContext = sourceContext;
array_construct.Type = (TypeNode)type.convert();
array_construct.Operands = new ExpressionList();
for (int i = 0; i < Rank; i++)
{
array_construct.Operands.Add(dimensions[i]);
}
array_initializer.Source = array_construct;
array_initializer.Target = indexer;
array_initializer.SourceContext = sourceContext;
block.Statements.Add(array_initializer);
Bypass:
// Generate x[i0,i1,...] for passing to the recursive call.
Indexer new_indexer = new Indexer();
new_indexer.Object = indexer;
new_indexer.Type = type.convert() as TypeNode;
new_indexer.ElementType = ((ARRAY_TYPE)type).base_type.convert() as TypeNode;
new_indexer.Operands = new ExpressionList();
for (int i = 0; i < Rank; i++)
{
Identifier index = Identifier.For("_i" + (level + i).ToString());
new_indexer.Operands.Add(index);
}
// Generate the last part (see comment, part 4, below).
Block elem_initializers =
createElementInitializerInternal(((ARRAY_TYPE)type).base_type, new_indexer, level + Rank, nonConstantDimensions, true, sourceContext);
if (elem_initializers == null)
{
return(block);
}
// We do not need loops to initialize elements...
// Return just array initializer.
// Otherwise go generate initializers.
// Generate
// 1) int i0, i1, ...;
// 2) for (int i1=0; i1<n; i1++)
// for (int i2=0; i2<m; i2++)
// ...
//
// Generate recursively:
// 3) Initializers for array elements: x[i1,i2,...] = new object[n];
// 4) Initializers for every element (the similar loop(s)).
// Generate int i0, i1, ...;
for (int i = 0; i < Rank; i++)
{
VariableDeclaration locali =
new VariableDeclaration(Identifier.For("_i" + (level + i).ToString()), SystemTypes.Int32, null);
block.Statements.Add(locali);
}
// Generate loop headers:
// for (int i1=0; i1<n; i1++)
// for (int i2=0; i2<m; i2++)
// ...
Block owner = block; // where to put generated for-node
for (int i = 0; i < Rank; i++)
{
For forStatement = new For();
// forStatement.NodeType;
forStatement.SourceContext = sourceContext;
// Making for-statement's body
forStatement.Body = new Block();
forStatement.Body.Checked = true;
forStatement.Body.HasLocals = false;
// forStatement.Body.NodeType;
// forStatement.Body.Scope;
forStatement.Body.SourceContext = sourceContext;
forStatement.Body.SuppressCheck = false;
forStatement.Body.Statements = new StatementList();
// Now leave the body empty...
// Making condition: i<n
BinaryExpression condition = new BinaryExpression();
condition.NodeType = NodeType.Lt;
condition.Operand1 = Identifier.For("_i" + (level + i).ToString());
condition.Operand2 = dimensions[i];
condition.SourceContext = sourceContext;
forStatement.Condition = condition;
// Making incrementer: i+=1
forStatement.Incrementer = new StatementList();
AssignmentStatement assignment = new AssignmentStatement();
assignment.NodeType = NodeType.AssignmentStatement;
assignment.Operator = NodeType.Add; // Hope this means +=
// assignment.OperatorOverload
assignment.Source = new Literal((int)1, SystemTypes.Int32);
assignment.SourceContext = sourceContext;
assignment.Target = Identifier.For("_i" + (level + i).ToString());
forStatement.Incrementer.Add(assignment);
// Making initializer: i=0
forStatement.Initializer = new StatementList();
AssignmentStatement initializer = new AssignmentStatement();
initializer.NodeType = NodeType.AssignmentStatement;
initializer.Operator = NodeType.Nop; // this means "normal" assignment, but not += etc.
initializer.Source = new Literal(0, SystemTypes.Int32);
initializer.Target = Identifier.For("_i" + (level + i).ToString());
initializer.SourceContext = sourceContext;
forStatement.Initializer.Add(initializer);
owner.Statements.Add(forStatement);
owner = forStatement.Body; // for next iteration
}
// Adding element initializers generated in advance.
owner.Statements.Add(elem_initializers);
return(block);
}
else if (type is OBJECT_TYPE)
{
// Check if the type is VAL-object.
if (!((OBJECT_TYPE)type).ObjectUnit.modifiers.Value)
{
return(null);
}
Block block = new Block(new StatementList());
// Generate 'new obj'
DECLARATION objct = ((OBJECT_TYPE)type).ObjectUnit;
// We do it for only own value types. They have
// extra constcutor that takes ont fictive intgere. Might have
// Chtck and call it
Construct construct = new Construct();
// Strange thing: CCI expects _class_ in Construst.Constructor,
// but not a constructor itself!..
// construct.Constructor = new MemberBinding(null,((TypeNode)objct.convert()).GetConstructors()[0]); // NODE.convertTypeName(objct);
construct.Constructor = new MemberBinding(null, (TypeNode)objct.convert());
construct.Constructor.Type = SystemTypes.Type;
construct.Operands = new ExpressionList();
construct.SourceContext = sourceContext;
construct.Type = (TypeNode)objct.convert();
construct.Operands.Add(new Literal(1, SystemTypes.Int32));
// Generate x[i0,i1,...] = new obj;
AssignmentStatement main_initializer = new AssignmentStatement();
main_initializer.NodeType = NodeType.AssignmentStatement;
main_initializer.Operator = NodeType.Nop; // this means "normal" assignment, but not += etc.
main_initializer.Source = construct;
main_initializer.Target = indexer;
main_initializer.SourceContext = sourceContext;
block.Statements.Add(main_initializer);
return(block);
}
else
if (type is EXTERNAL_TYPE)
{
// Only value types might need extra calls
Struct str = ((EXTERNAL_TYPE)type).entity as Struct;
InstanceInitializer ctr = str.GetConstructor(new TypeNode[] { SystemTypes.Int32 });
bool possibly_was_our_structure = (ctr != null);
if (ctr == null)
{
ctr = str.GetConstructor(new TypeNode[0] {
});
}
// TO_DO: When metadata is available replace this with
// more consistent check
Block block = new Block(new StatementList());
// Generate 'new obj'
Construct construct = new Construct();
construct.Constructor = new MemberBinding(null, ctr);
construct.Operands = new ExpressionList();
construct.Type = str;
// We do it for only own value types. They have
// extra constcutor that takes ont fictive intgere. Might have
// Chtck and call it
if (possibly_was_our_structure)
{
construct.Operands.Add(Literal.Int32MinusOne);
}
// Generate x[i0,i1,...] = new obj;
AssignmentStatement main_initializer = new AssignmentStatement();
main_initializer.NodeType = NodeType.AssignmentStatement;
main_initializer.Operator = NodeType.Nop; // this means "normal" assignment, but not += etc.
main_initializer.Source = construct;
main_initializer.Target = indexer;
main_initializer.SourceContext = sourceContext;
indexer.Type = construct.Type;
block.Statements.Add(main_initializer);
return(block);
}
else
{
return(null);
}
}