// AssignStatement
public override bool Walk(AssignStatement node)
{
assignmentAnalyzer.Analyze(node);
return true;
}
public void Analyze(AssignStatement assignment)
{
this.assignment = assignment;
foreach (Expression e in assignment.Left) {
FieldExpression field = e as FieldExpression;
if (null != field) {
analyzer.SaveFieldExpressionession(field, assignment.Right);
}
e.Walk(this);
}
}
public void PostWalk(AssignStatement node)
{
PostProcess(node);
}
// AssignStatement
public bool Walk(AssignStatement node)
{
return Process(node);
}
public override void PostWalk(AssignStatement node)
{
}
// AssignStmt
public override bool Walk(AssignStatement node)
{
node.Right.Walk(this);
foreach (Expression e in node.Left) {
e.Walk(fdef);
}
return false;
}
// anything else gets emitted directly
// into the current initialization function. If this
// is something like a conditional block that includes
// a function definition it will not be visible at .NET
// scope (but will still work).
public override bool Walk(AssignStatement node)
{
if (stack.Count == 1) {
node.Emit(stack.Peek().StaticConstructor);
return false;
}
CallExpression rhsCall = node.Right as CallExpression;
if (rhsCall != null) {
bool fCantEmit = false;
NameExpression ne = rhsCall.Target as NameExpression;
string get = null, set = null;
if (ne != null) {
if (ne.Name.GetString() == "property") {
// property definition...
fCantEmit = GetPropertyAccessors(rhsCall, ref ne, ref get, ref set);
}
}
if (!fCantEmit) {
PropertyBuilder pb = stack.Peek().Type.DefineProperty(((NameExpression)node.Left[0]).Name.GetString(), PropertyAttributes.None, typeof(object));
foreach (CodeGen cg in stack.Peek().Methods) {
if (get != null && cg.methodInfo.Name == get) {
pb.SetGetMethod((MethodBuilder)cg.methodInfo);
} else if (set != null && cg.methodInfo.Name == set) {
pb.SetSetMethod((MethodBuilder)cg.methodInfo);
}
}
return false;
}
}
ConstantExpression rhsConstant = node.Right as ConstantExpression;
NameExpression rhsName;
if (rhsConstant != null) {
if (rhsConstant.Value != null) {
stack.Peek().Type.AddStaticField(rhsConstant.Value.GetType(), ((NameExpression)node.Left[0]).Name.GetString());
} else {
stack.Peek().Type.AddStaticField(typeof(object), ((NameExpression)node.Left[0]).Name.GetString());
}
} else if ((rhsName = node.Right as NameExpression) != null &&
(rhsName.Name.GetString() == "True" || rhsName.Name.GetString() == "False")) {
stack.Peek().Type.AddStaticField(typeof(bool), ((NameExpression)node.Left[0]).Name.GetString());
} else {
Emit(node);
}
return false;
}
public AssignmentDefinition(AssignStatement assignment)
{
this.assignment = assignment;
}
public override bool Walk(AssignStatement node)
{
if (!FoundSlots && node.Left.Count == 1) {
NameExpression ne = node.Left[0] as NameExpression;
if (ne != null && ne.Name.GetString() == "__slots__") {
ListExpression le = node.Right as ListExpression;
if (le != null) {
string[] slotRes = new string[le.Items.Count];
for (int i = 0; i < le.Items.Count; i++) {
ConstantExpression ce = le.Items[i] as ConstantExpression;
if (ce == null) {
slotRes = null;
break;
}
string slotStr = ce.Value as string;
if (slotStr == null) {
slotRes = null;
break;
}
slotRes[i] = slotStr;
}
slots = slotRes;
}
FoundSlots = true;
}
}
return false;
}
public virtual void PostWalk(AssignStatement node)
{
}
// AssignStatement
public virtual bool Walk(AssignStatement node)
{
return true;
}
// AssignStmt
public override bool Walk(AssignStatement node)
{
foreach (Expression e in node.Left) {
e.Walk(define);
}
return true;
}
//expr_stmt: testlist (augassign testlist | ('=' testlist)*)
//augassign: '+=' | '-=' | '*=' | '/=' | '%=' | '&=' | '|=' | '^=' | '<<=' | '>>=' | '**=' | '//='
private Statement ParseExprStmt()
{
Expression lhs = ParseTestListAsExpr(false);
if (MaybeEat(TokenKind.Assign)) {
List<Expression> l = new List<Expression>();
l.Add(lhs);
do {
Expression e = ParseTestListAsExpr(false);
l.Add(e);
} while (MaybeEat(TokenKind.Assign));
int last = l.Count - 1;
Expression rhs = (Expression)l[last];
l.RemoveAt(last);
Expression[] lhss = l.ToArray();
//We check for legal assignment targets during code generation rather than parsing
Statement ret = new AssignStatement(lhss, rhs);
ret.SetLoc(GetExternal(), lhs.Start, GetEnd());
return ret;
} else {
BinaryOperator op = GetAssignOp(PeekToken());
if (op == null) {
Statement ret = new ExpressionStatement(lhs);
ret.SetLoc(GetExternal(), lhs.Start, GetEnd());
return ret;
} else {
NextToken();
Expression rhs = ParseTestListAsExpr(false);
Statement ret = new AugAssignStatement(op, lhs, rhs);
ret.SetLoc(GetExternal(), lhs.Start, GetEnd());
return ret;
}
}
}
