//
// We add an implicit conversion from "object" to any of our heap-allocated
// types.
//
// We also permit implicit conversions between "int" and "byte".
//
// TODO: We may need to construct a more elaborate expression here for the
// conversion to permit the runtime to make the appropriate checks.
//
public override bool ImplicitCoercionFromTo(Expression source, TypeNode t1, TypeNode t2)
{
if (t1 == SystemTypes.Object)
{
if (t2 is Chan || t2 is Set || t2 is ZArray || t2 is Class)
return true;
else
return false;
}
if (t2 == SystemTypes.Object)
{
if (t1 is Chan || t1 is Set || t1 is ZArray || t1 is Class)
return true;
else
return false;
}
if (t1 == SystemTypes.Int32 && t2 == SystemTypes.UInt8)
return true;
if (t1 == SystemTypes.UInt8 && t2 == SystemTypes.Int32)
return true;
return base.ImplicitCoercionFromTo(source, t1, t2);
}
public void CheckMethodSpecAdmissibility(Expression exp, Method method, bool reportWFonly, bool dontReport) {
DeclaringMethod = method;
ReportWFErrorOnly = reportWFonly; // true for Pure methods: we only want to enforce well-foundedness on them
DontReportError = dontReport;
StateStack = new System.Collections.Stack();
ResetCurrentState();
this.VisitExpression(exp);
}
public override void VisitExpression(Expression expression)
{
if (expression == null) return;
if (expression.NodeType == NodeType.Pop)
PopOccurrences++;
base.VisitExpression(expression);
}
public AbbreviationDuplicator(Method sourceMethod, Method targetMethod, ContractNodes contractNodes,
Method abbreviation, Expression targetObject, ExpressionList actuals)
: base(targetMethod.DeclaringType.DeclaringModule, sourceMethod, targetMethod, contractNodes, false)
{
this.targetObject = targetObject;
this.abbreviation = abbreviation;
this.actuals = actuals;
this.localsInActuals = new TrivialHashtable();
PopulateLocalsInActuals();
}
public override Expression ImplicitCoercion(Expression source, TypeNode targetType, TypeViewer typeViewer)
{
// LJW: added third parameter "typeViewer" so we override the correct thing
if (source == null || source.Type == null || targetType == null)
return null;
if (source.Type is EnumNode && targetType == SystemTypes.Int32)
{
return source;
}
if (source.Type == SystemTypes.Object)
{
if (targetType is Chan || targetType is Set || targetType is ZArray || targetType is Class)
return source;
else
{
this.HandleError(source, System.Compiler.Error.NoImplicitCoercion, "object", targetType.FullName);
return null;
}
}
if (targetType == SystemTypes.Object)
{
if (!(source.Type is Chan || source.Type is Set || source.Type is ZArray || source.Type is Class))
{
this.HandleError(source, System.Compiler.Error.NoImplicitCoercion, source.Type.FullName, "object");
return null;
}
}
if (source.Type == SystemTypes.Int32 && targetType == SystemTypes.UInt8)
{
BinaryExpression binExpr = new BinaryExpression(source, new MemberBinding(null, SystemTypes.UInt8),
NodeType.Castclass, source.SourceContext);
binExpr.Type = SystemTypes.UInt8;
return binExpr;
}
if (source.Type == SystemTypes.UInt8 && targetType == SystemTypes.Int32)
{
BinaryExpression binExpr = new BinaryExpression(source, new MemberBinding(null, SystemTypes.Int32),
NodeType.Castclass, source.SourceContext);
binExpr.Type = SystemTypes.Int32;
return binExpr;
}
return base.ImplicitCoercion(source, targetType, typeViewer);
}
internal static Statement GenerateForLoop(Variable loopVariable, Expression lowerBound, Expression upperBound, Statement body)
{
Block bodyAsBlock = body as Block ?? new Block(new StatementList(body));
Block init = new Block(new StatementList(2));
Block increment = new Block(new StatementList(1));
Block test = new Block(new StatementList(new Branch(
new BinaryExpression(loopVariable, upperBound, NodeType.Lt), bodyAsBlock))); //, false, true, false)));
init.Statements.Add(new AssignmentStatement(loopVariable, lowerBound));
init.Statements.Add(new Branch(null, test));
increment.Statements.Add(new AssignmentStatement(loopVariable, new BinaryExpression(loopVariable, Literal.Int32One, NodeType.Add)));
Block forLoop = new Block(new StatementList(4));
forLoop.Statements.Add(init);
forLoop.Statements.Add(bodyAsBlock);
forLoop.Statements.Add(increment);
forLoop.Statements.Add(test);
return forLoop;
}
public void VisitPop(Expression expression)
{
if (expression == null)
{
VisitPop();
return;
}
// a pop where we know what we pop.
this.VisitPop();
}
public override Expression VisitExpression(Expression expression)
{
Expression result = base.VisitExpression(expression);
return result;
}
void AddReadAllGroup(Class serializer, Block block, TypeNode type, StatementList statements, Identifier reader,
Expression target, Expression required, Expression result, ArrayList members, Member mixedMember) {
// todo: keep track of which members have been read and report error on duplicates
MethodCall read = new MethodCall(new QualifiedIdentifier(reader, Identifier.For("Read")), new ExpressionList());
Local sb = new Local(SystemTypes.StringBuilder);
bool isMixed = mixedMember != null;
if (isMixed) {
statements.Add(new AssignmentStatement(sb,
new Construct(new MemberBinding(null, SystemTypes.StringBuilder), new ExpressionList(), SystemTypes.StringBuilder)));
}
Block whileBody = new Block(new StatementList());
BinaryExpression notEndTag = new BinaryExpression(
new QualifiedIdentifier(reader, Identifier.For("NodeType")) ,
new QualifiedIdentifier(Identifier.For("XmlNodeType"), Identifier.For("EndElement")), NodeType.Ne);
BinaryExpression notEOF = new BinaryExpression(
new QualifiedIdentifier(reader, Identifier.For("EOF")), Literal.True, NodeType.Ne);
While w = new While(new BinaryExpression(notEndTag, notEOF, NodeType.And), whileBody);
statements.Add(w);
Local nameLocal = new Local(Identifier.For("name"),SystemTypes.String,block);
Local nsLocal = new Local(Identifier.For("ns"),SystemTypes.String,block);
Local nodeType = new Local(Identifier.For("nodeType"),Runtime.XmlNodeType,block);
whileBody.Statements.Add(new AssignmentStatement(nameLocal, new QualifiedIdentifier(reader, Identifier.For("LocalName"))));
whileBody.Statements.Add(new AssignmentStatement(nsLocal, new QualifiedIdentifier(reader, Identifier.For("NamespaceURI"))));
whileBody.Statements.Add(new AssignmentStatement(nodeType, new QualifiedIdentifier(reader, Identifier.For("NodeType"))));
Block childBlock = whileBody;
if (isMixed) {
// Append the text node to the current StringBuilder contents.
childBlock = new Block(new StatementList());
If ifText = new If(IsTextNode(nodeType), new Block(new StatementList()), childBlock);
whileBody.Statements.Add(ifText);
ExpressionList args = new ExpressionList();
args.Add(new QualifiedIdentifier(reader, Identifier.For("Value")));
ifText.TrueBlock.Statements.Add(new ExpressionStatement(new MethodCall(
new QualifiedIdentifier(sb, Identifier.For("Append")), args)));
ifText.TrueBlock.Statements.Add(new ExpressionStatement(read)); // advance to next node
}
If ifElement = new If(new BinaryExpression(nodeType,
new QualifiedIdentifier(Identifier.For("XmlNodeType"), Identifier.For("Element")), NodeType.Eq),
new Block(new StatementList()), new Block(new StatementList()));
childBlock.Statements.Add(ifElement);
childBlock = ifElement.TrueBlock;
//AddConsoleWrite(statements, new Literal("name=",SystemTypes.String));
//AddConsoleWriteLine(statements, nameLocal);
//AddConsoleWrite(statements, new Literal("nodeType=",SystemTypes.String));
//AddConsoleWriteLine(statements, nodeType);
foreach (NamedNode childNode in members) {
if (!(childNode.Member is Field || childNode.Member is Property)) {
AddError(statements, reader, RuntimeError.SerializationOfTypeNotSupported,
new Literal(childNode.Member.GetType().FullName, SystemTypes.String));
} else {
Expression mb = GetMemberBinding(target, childNode.Member);
childBlock = AddReadChild(block, childBlock.Statements, childNode.Name, childNode.TypeNode, mb, reader, result, true, false).FalseBlock;
// todo: throw error if child is required. (e.g. NonEmptyIEnumerable...)
}
}
// if it isn't any of the expected elements then throw an error.
AddError(childBlock.Statements, reader, RuntimeError.NoSuchMember,
new Expression[2]{new Literal(tempChecker.GetTypeName(type),SystemTypes.String), nameLocal});
// If it's not an element then consume it anyway to keep the reader advancing.
// Probably a comment or PI or something.
ifElement.FalseBlock.Statements.Add(new ExpressionStatement(new MethodCall(
new QualifiedIdentifier(reader, Identifier.For("Skip")), new ExpressionList())));
if (isMixed) {
statements.Add(new AssignmentStatement(GetMemberBinding(target, mixedMember),
new MethodCall(new QualifiedIdentifier(sb, Identifier.For("ToString")), new ExpressionList())));
}
statements.Add(new AssignmentStatement(result, Literal.True));
}
void AddReadContent(Class serializer, Block block, TypeNode type, StatementList statements, Identifier reader,
Expression target, Expression required, Expression result, SchemaValidator validator) {
// position us in the content.
statements.Add(new ExpressionStatement(new MethodCall(new QualifiedIdentifier(reader, Identifier.For("MoveToContent")), new ExpressionList())));
Local elementName = new Local(Identifier.Empty,SystemTypes.String);
statements.Add(new AssignmentStatement(elementName, new QualifiedIdentifier(reader, Identifier.For("LocalName"))));
// make sure the element is not empty.
If isEmpty = AddEmptyElementCheck(statements, reader);
// Read the contents.
statements = isEmpty.FalseBlock.Statements;
statements.Add(new ExpressionStatement(new MethodCall(new QualifiedIdentifier(reader, Identifier.For("Read")), new ExpressionList())));
statements.Add(new ExpressionStatement(new MethodCall(new QualifiedIdentifier(reader, Identifier.For("MoveToContent")), new ExpressionList())));
ValidationState context = new ValidationState();
context.ErrorHandler = this.errorHandler;
validator.validator.InitValidation(context);
ArrayList members = null;
if (validator.validator is AllElementsContentValidator) {
members = validator.validator.ExpectedElements(context, false, false);
AddReadAllGroup(serializer, block, type, statements, reader, target, required, result, members, validator.validator.MixedMember);
} else {
// There should be one root level anonymous Item0 member.
SequenceNode seq = (SequenceNode)validator.RootNode; // this is a wrapper node.
if (seq == null) {
// perhaps it is ContentType.Empty or Mixed.
if (validator.validator.ContentType == XmlSchemaContentType.Mixed ||
validator.validator.ContentType == XmlSchemaContentType.TextOnly){
Debug.Assert(validator.validator.MixedMember != null);
statements.Add(new AssignmentStatement(GetMemberBinding(target, validator.validator.MixedMember),
new MethodCall(new QualifiedIdentifier(reader, Identifier.For("ReadStringElement")), new ExpressionList())));
}
return;
} else {
ContentNode n = seq.LeftChild;
AddReadContentNode(n, block, statements, reader, target, required, result, validator);
}
}
// consume final end tag
statements.Add(new ExpressionStatement(new MethodCall(new QualifiedIdentifier(reader, Identifier.For("ReadEndTag")), new ExpressionList(elementName))));
}
void GetNameAndNamespace(TypeNode type, out Expression name, out Expression ns) {
name = Literal.Null;
ns = Literal.Null;
if (!IsStructuralType(type)) {
Identifier id = Checker.GetDefaultElementName(type);
name = new Literal(id.Name, SystemTypes.String);
if (id.Prefix != null) {
ns = new Literal(id.Prefix.Name, SystemTypes.String);
}
}
}
void AddWriteChoice(TypeUnion tu, StatementList statements, TypeNode referringType, Expression src, Identifier writer) {
// generate the following code:
// Type srcType = src.GetType();
// if (choiceType.IsAssignableFrom(srcType)){
// XxxxSerializer s = new XxxxSerializer();
// s.Serialize((runtimeType)src, writer);
// } else if (...) {
// // and so on.
// }
// What we cannot do here is by creating nested XmlSerializers
// based on runtime type because this could cause infinite recurrsion.
// So we cannot serialize a type union where one of the choices is "object".
TypeNodeList choices = tu.Types;
MethodCall call = new MethodCall();
call.Callee = new QualifiedIdentifier(src, Identifier.For("GetType"));
call.Operands = new ExpressionList();
Local local = new Local(SystemTypes.Type);
statements.Add(new AssignmentStatement(local, call));
for (int i = 0, n = choices.Length; i < n; i++) {
TypeNode choiceType = choices[i];
if (choiceType == null) continue; // type resolution error.
// if (choiceType.IsAssignableFrom(srcType)){
BinaryExpression condition = new BinaryExpression(
new MethodCall(
new QualifiedIdentifier(new UnaryExpression(new MemberBinding(null, choiceType), NodeType.Typeof), Identifier.For("IsAssignableFrom")),
new ExpressionList(new Expression[] { local })),
Literal.True,
NodeType.Eq);
Block block = new Block();
block.Statements = new StatementList();
BinaryExpression cast = CastTo(src, choiceType);
Expression name = null, ns = null;
GetNameAndNamespace(choiceType, out name, out ns);
Expression simplename = name, simplens = ns;
// Check for choice of type: [string] and match this with XmlTextNode.
TypeNode unwrapped = UnwrapSingletonTuple(choiceType, true);
if (unwrapped == null) unwrapped = choiceType;
if (unwrapped != null && unwrapped.IsPrimitive) {
simplename = simplens = null;
choiceType = unwrapped;
}
if (!AddWriteSimpleType(choiceType, block.Statements, referringType, writer, cast, simplename, simplens)) {
AddCallSerializer(choiceType, block.Statements, cast, writer, name, ns);
}
If ifStatement = new If(condition, block, null);
statements.Add(ifStatement);
}
}
void AddWriteAttributes(StatementList statements, TypeNode referringType, Identifier writer, Expression source, SchemaValidator validator) {
if (validator.Attributes != null) {
foreach (SchemaAttDef ad in validator.Attributes) {
Identifier name = ad.Name;
Expression src = GetMemberBinding(source, ad.Member);
if (src.Type == null) continue; // type resolution error.
if (!AddWriteSimpleAttribute(src.Type, name, statements, referringType, writer, src)) {
// throw exception, attribute has complex type!
}
}
}
}
StatementList AddCheckForNull(StatementList statements, Expression src, TypeNode type) {
if (type.Template == SystemTypes.GenericBoxed) {
If checknull = new If(new BinaryExpression(
new MethodCall(new MemberBinding(src, type.GetMethod(Identifier.For("IsNull"),null)), new ExpressionList()),
Literal.True, NodeType.Ne),
new Block(new StatementList()), null);
statements.Add(checknull);
return checknull.TrueBlock.Statements;
}
else if (type is TypeAlias) {
// cast to underlying type and check that for null.
TypeNode atype = ((TypeAlias)type).AliasedType;
return AddCheckForNull(statements, CastTo(src, atype), atype);
}
else if (type is ConstrainedType) {
// cast to underlying type and check that for null.
TypeNode atype = ((ConstrainedType)type).UnderlyingType;
return AddCheckForNull(statements, CastTo(src, atype), atype);
}
else if (!IsStream(type) && !type.IsValueType) { //stream types are doing weird things to the null check?
if (type == SystemTypes.String || IsStream(type))
src = CastTo(src, SystemTypes.Object);
If checknull = new If(new BinaryExpression(src, Literal.Null, NodeType.Ne),
new Block(new StatementList()), null);
statements.Add(checknull);
return checknull.TrueBlock.Statements;
}
return statements;
}
Expression Duplicate(Expression e, TypeNode referringType) {
Duplicator dup = new Duplicator(this.module, referringType);
return dup.VisitExpression(e);
}
void AddWriteMember(Member child, Identifier name, StatementList statements, TypeNode referringType, Expression src, Identifier writer, bool emptyElementOnNull) {
src = GetMemberBinding(src, child);
TypeNode type = src.Type;
if (type == null) return;
if (type.Template == SystemTypes.GenericBoxed) {
statements = AddCheckForNull(statements, Duplicate(src, referringType), type);
type = Checker.GetCollectionElementType(type);
src = CastTo(src, type);//unbox it
}
if (child.IsAnonymous) {
if (type is TypeAlias) {
TypeAlias alias = (TypeAlias)type;
src = CastTo(src, alias.AliasedType); //unbox it
AddWriteElement(statements, referringType, writer, alias.Name, src, alias.AliasedType, emptyElementOnNull);
} else if (!AddWriteSimpleType(type, statements, referringType, writer, src, Literal.Null, Literal.Null)) {
if (type is TupleType || type is TypeUnion || IsStream(type)) {
AddCallSerializer(type, statements, src, writer, Literal.Null, Literal.Null);
} else {
AddWriteElement(statements, referringType, writer, type.Name, src, type, emptyElementOnNull);
}
}
} else if (type is TypeAlias) {
TypeAlias alias = (TypeAlias)type;
src = CastTo(src, alias.AliasedType); //unbox it
AddWriteElement(statements, referringType, writer, name, src, alias.AliasedType, emptyElementOnNull);
} else {
AddWriteElement(statements, referringType, writer, name, src, type, emptyElementOnNull);
}
}
void AddWriteTuple(TupleType tuple, StatementList statements, TypeNode referringType, Expression src, Identifier writer) {
TypeNode singleton = UnwrapSingletonTuple(tuple, true);
if (singleton != null && singleton == SystemTypes.String) {
// special case which looks like mixed content.
// happens a lot when XML Schema contains SimpleTypes that extend xsd:string.
AddWriteSimpleType(singleton, statements, referringType, writer, src, null, null);
} else {
for (int i = 0, n = tuple.Members.Length; i < n; i++) {
Member child = tuple.Members[i];
if (child is Field) {
Field f = (Field)child;
if (f.Type == null) continue; // type resolution error.
// bugbug - what about [XmlElement] custom attributes?
AddWriteMember(f, f.Name, statements, referringType, src, writer, true);
}
}
}
}
MemberBinding GetMemberBinding(Expression source, Member m) {
MemberBinding src = new MemberBinding(source, m);
src.Type = Checker.GetMemberType(m);
return src;
}
void AddWriteStream(TypeNode type, StatementList statements, TypeNode referringType, Expression src, Identifier writer) {
// Generate the following code:
// XxxxSerializer s = new XxxxSerializer();
// foreach (Xxxx x in src) {
// s.Serialize(x,writer);
// }
// Where Xxxx is the element type for the given stream type.
if (type.Template == SystemTypes.GenericNonEmptyIEnumerable) {
type = Checker.GetIEnumerableTypeFromNonEmptyIEnumerableStruct(this.module, type);
} else {
statements = AddCheckForNull(statements, Duplicate(src, referringType), type);
}
TypeNode ceType = Checker.GetCollectionElementType(type);
//todo: should check that type has an IEnumerator.
Identifier loopVariable = Identifier.For("e");
loopVariable.Type = ceType;
Block body = new Block();
body.Statements = new StatementList();
Expression name, ns;
GetNameAndNamespace(ceType, out name, out ns);
// call the Serialize method on it, passing the member we're serializing.
if (!AddWriteSimpleType(ceType, body.Statements, referringType, writer, loopVariable, name, ns)) {
AddCallSerializer(ceType, body.Statements, loopVariable, writer, name, ns);
}
ForEach fe = new ForEach(ceType, loopVariable, src, body);
statements.Add(fe);
}
MemberBinding GetMemberBinding(Expression source, Member m, TypeNode t) {
MemberBinding src = new MemberBinding(source, m);
src.Type = t;
return src;
}
//================= reader methods ==========================================
void AddReadAttributes(TypeNode type, StatementList statements, Identifier reader, Expression target, SchemaValidator validator) {
if (validator.Attributes != null) {
Block whileBody = new Block(new StatementList());
Literal trueLit = Literal.True;
MethodCall movenext = new MethodCall(new QualifiedIdentifier(reader, Identifier.For("MoveToNextAttribute")), new ExpressionList());
BinaryExpression condition = new BinaryExpression(movenext, trueLit, NodeType.Eq);
While w = new While(condition, whileBody);
statements.Add(w);
Block lastElseBlock = null;
Local nameLocal = new Local(SystemTypes.String);
whileBody.Statements.Add(new AssignmentStatement(nameLocal, new QualifiedIdentifier(reader, Identifier.For("LocalName"))));
Local nsLocal = new Local(SystemTypes.String);
whileBody.Statements.Add(new AssignmentStatement(nsLocal, new QualifiedIdentifier(reader, Identifier.For("NamespaceURI"))));
foreach (SchemaAttDef ad in validator.Attributes) {
// todo: any way to do tokenized compares?
BinaryExpression nameEqual = new BinaryExpression(nameLocal,
new Literal(ad.Name.Name, SystemTypes.String), NodeType.Eq);
BinaryExpression nsEqual = new BinaryExpression(nsLocal,
new Literal(ad.Name.Prefix != null ? ad.Name.Prefix.Name : "", SystemTypes.String), NodeType.Eq);
Block elseBlock = new Block(new StatementList());
If ifExpr = new If(new BinaryExpression(nameEqual, nsEqual, NodeType.And), new Block(new StatementList()), elseBlock);
if (lastElseBlock != null) {
lastElseBlock.Statements.Add(ifExpr);
} else {
whileBody.Statements.Add(ifExpr);
}
lastElseBlock = elseBlock;
// body of if test, parse the attribute value as the specified type.
Debug.Assert(ad.Member is Field || ad.Member is Property);
AddReadSimpleType(Checker.GetMemberType(ad.Member), ifExpr.TrueBlock.Statements, reader, GetMemberBinding(target, ad.Member), null, true);
}
//todo: report unknown attributes?
}
}
void AddWriteContent(TypeNode type, StatementList statements, TypeNode referringType, Identifier writer, Expression source, SchemaValidator validator) {
if (validator.validator is AllElementsContentValidator) {
ValidationState context = new ValidationState();
context.ErrorHandler = this.errorHandler;
validator.validator.InitValidation(context);
ArrayList members = validator.validator.ExpectedElements(context, false, false);
foreach (NamedNode childNode in members) {
if (childNode.TypeNode == null) continue; // type resolution error.
Expression src = GetMemberBinding(source, childNode.Member, childNode.TypeNode);
AddWriteElement(statements, referringType, writer, childNode.Name, src, childNode.TypeNode, false);
}
} else {
// Note: there is a SequenceNode wrapper we need to remove and throw away.
SequenceNode seq = validator.RootNode as SequenceNode;
if (seq != null) {
// if seq is null then it's ContentType.Empty or Mixed and mixed is handled at the end.
ContentNode n = seq.LeftChild;
AddWriteContentNode(n, statements, referringType, writer, source);
}
}
Member mixed = validator.validator.MixedMember;
if (mixed != null) {
MemberBinding mb = GetMemberBinding(source, mixed);
if (mb.Type != null)
AddWriteString(statements, referringType, writer, mb);
}
}
void AddReadContentNode(ContentNode n, Block block, StatementList statements, Identifier reader,
Expression target, Expression required, Expression result, SchemaValidator validator) {
if (n.TypeNode == null) {
Debug.Assert(n is SequenceNode);
// In the class inheritance case we have two independent left and right children inside
// a parent sequence that has no unified type or member.
SequenceNode s = (SequenceNode)n;
AddReadContentNode(s.LeftChild, block, statements, reader, target, required, result, validator);
AddReadContentNode(s.RightChild, block, statements, reader, target, required, result, validator);
return;
}
TypeNode ct = n.TypeNode;
Debug.Assert(ct != null);
if (n.Member != null && !(n.Member is Method)) {
target = GetMemberBinding(target, n.Member);
ct = target.Type;
}
// todo: might be content model AND mixed, in which case we have to pass the MixedMember
// to AddReadTuple, AddReadChoice and AddReadStream.
if (ct.Template == SystemTypes.GenericBoxed){
ct = Checker.GetCollectionElementType(ct);
}
if (ct is TupleType) {
AddReadTuple(block, ct as TupleType, statements, reader, target, required, result);
} else if (ct is TypeUnion) {
AddReadChoice(block, ct as TypeUnion, statements, reader, target, required, result);
} else if (IsStream(ct)) {
AddReadStream(block, ct, statements, reader, target, result);
} else if (ct is TypeAlias) {
AddReadAlias(block, ct as TypeAlias, statements, reader, target, required, result);
} else {
Identifier name = Checker.GetDefaultElementName(ct);
AddReadRequiredChild(block, statements, name, ct, target, reader, result, required, true, false);
}
}
void AddWriteContentNode(ContentNode n, StatementList statements, TypeNode referringType, Identifier writer, Expression source) {
if (n.TypeNode == null) {
Debug.Assert(n is SequenceNode);
// In the class inheritance case we have two independent left and right children inside
// a parent sequence that has no unified type or member.
SequenceNode s = (SequenceNode)n;
AddWriteContentNode(s.LeftChild, statements, referringType, writer, source);
AddWriteContentNode(s.RightChild, statements, referringType, writer, source);
return;
}
TypeNode ct = n.TypeNode;
Expression src = source;
if (n.Member != null && !(n.Member is Method)) {
src = GetMemberBinding(source, n.Member, ct);
}
if (ct.Template == SystemTypes.GenericBoxed) {
statements = AddCheckForNull(statements, Duplicate(src, referringType), ct);
ct = Checker.GetCollectionElementType(ct);
src = CastTo(src, ct);//unbox it
}
if (ct is TupleType) {
AddWriteTuple(ct as TupleType, statements, referringType, src, writer);
} else if (ct is TypeUnion) {
AddWriteChoice(ct as TypeUnion, statements, referringType, src, writer);
} else if (IsStream(ct)) {
AddWriteStream(ct, statements, referringType, src, writer);
} else if (ct is TypeAlias) {
TypeAlias alias = (TypeAlias)ct;
src = CastTo(src, alias.AliasedType); //unbox it
AddWriteElement(statements, referringType, writer, alias.Name, src, alias.AliasedType, true);
} else {
AddWriteElement(statements, referringType, writer, ct.Name, src, ct, true);
}
}
/// <summary>
/// This method is called in contexts where surrounding parentheses
/// are required, but we wish to avoid extraneous ones. If the
/// expression is a BinaryExpression or UnaryExpression, then we
/// need not supply our own parens here.
/// </summary>
/// <param name="expr"></param>
/// <returns></returns>
private Expression VisitParenthesizedExpression(Expression expr)
{
if (expr is BinaryExpression)
this.VisitExpression(expr);
else
{
Write("(");
this.VisitExpression(expr);
Write(")");
}
return expr;
}
void AddWriteElement(StatementList statements, TypeNode referringType, Identifier writer, Identifier name, Expression src, TypeNode mt, bool emptyElementOnNull) {
if (mt.Template == SystemTypes.GenericBoxed) {
statements = AddCheckForNull(statements, Duplicate(src, referringType), mt);
mt = Checker.GetCollectionElementType(mt); // check for null and unbox
src = CastTo(src, mt); //unbox it
}
Literal nameLit = new Literal(name.ToString(), SystemTypes.String);
Literal nsLit = (name.Prefix != null) ? new Literal(name.Prefix.Name, SystemTypes.String) : Literal.Null;
if (!emptyElementOnNull) {
statements = AddCheckForNull(statements, Duplicate(src, referringType), mt);
}
if (!AddWriteSimpleType(mt, statements, referringType, writer, src, nameLit, nsLit)) {
AddCallSerializer(mt, statements, src, writer, nameLit, nsLit);
}
}
// Make sure we don't skip Pop, Dup, Arglist nodes which the standard Inspector does.
public override void VisitExpression(Expression expression)
{
if (expression == null) return;
switch (expression.NodeType)
{
case NodeType.Dup:
seenDup = true;
break;
case NodeType.Arglist:
return;
case NodeType.Pop:
UnaryExpression uex = expression as UnaryExpression;
if (uex != null)
{
this.VisitPop(uex.Operand);
return;
}
return;
default:
this.Visit(expression);
return;
}
}
void AddWriteString(StatementList statements, TypeNode referringType, Identifier writer, Expression src) {
statements = AddCheckForNull(statements, Duplicate(src, referringType), SystemTypes.String);
statements.Add( new ExpressionStatement(
new MethodCall(new QualifiedIdentifier(writer,Identifier.For("WriteString")),
new ExpressionList(src))));
}
public virtual Expression VisitTypeExpression(Expression expr)
{
TypeNodeList pars = this.pars;
TypeNodeList args = this.args;
Identifier id = expr as Identifier;
if (id != null)
{
int key = id.UniqueIdKey;
for (int i = 0, n = pars == null ? 0 : pars.Count, m = args == null ? 0 : args.Count; i < n && i < m; i++)
{
//^ assert pars != null && args != null;
TypeNode par = pars[i];
if (par == null || par.Name == null) continue;
if (par.Name.UniqueIdKey == key) return new Literal(args[i], CoreSystemTypes.Type);
}
return id;
}
Debug.Assert(expr is QualifiedIdentifier || expr is Literal);
return expr;
}
void AddCallSerializer(TypeNode srcType, StatementList statements, Expression src, Identifier writer, Expression rootName, Expression rootNamespace ) {
TypeNode type = Unwrap(srcType);
Class memberSerializer = this.CreateSerializerFor(type);
// call the Serialize method on it, passing the member we're serializing.
ExpressionList args = new ExpressionList();
args.Add(src);
args.Add(writer);
args.Add(rootName);
args.Add(rootNamespace);
MethodCall call = new MethodCall();
Method serialize = memberSerializer.GetMethod(Identifier.For("Serialize"), new TypeNode[4] { type, Runtime.XmlSerializationWriter, SystemTypes.String, SystemTypes.String} );
call.Callee = new MemberBinding(new MemberBinding(null, memberSerializer), serialize);
call.Operands = args;
statements.Add( new ExpressionStatement( call ) );
}