public ExprBinaryOp (MethodInfo methodInfo, Expr left, Expr right, Sn signage)
: base (methodInfo)
{
this.Left = left;
this.Right = right;
this.Signage = signage;
}
public virtual Expr Visit (Expr e)
{
switch (e.ExprType) {
case ExprType.Block:
return this.VisitBlock ((ExprBlock) e);
case ExprType.Nop:
return this.VisitNop ((ExprNop) e);
case ExprType.Call:
return this.VisitCall ((ExprCall) e);
case ExprType.CompareEqual:
return this.VisitCompareEqual ((ExprCompareEqual) e);
case ExprType.CompareLessThan:
return this.VisitCompareLessThan ((ExprCompareLessThan) e);
case ExprType.CompareGreaterThan:
return this.VisitCompareGreaterThan ((ExprCompareGreaterThan) e);
case ExprType.Add:
return this.VisitAdd ((ExprAdd) e);
case ExprType.Sub:
return this.VisitSub ((ExprSub) e);
case ExprType.LoadArg:
return this.VisitLoadArg ((ExprLoadArg) e);
case ExprType.LoadConstant:
return this.VisitLoadConstant ((ExprLoadConstant) e);
case ExprType.Return:
return this.VisitReturn ((ExprReturn) e);
case ExprType.Box:
return this.VisitBox ((ExprBox) e);
case ExprType.Conv:
return this.VisitConv ((ExprConv) e);
default:
throw new NotSupportedException ("Cannot handle: " + e.ExprType);
}
}
public override Expr Visit (Expr e)
{
Instruction inst;
if (this.instructionLookup.TryGetValue (e, out inst)) {
this.instructions.Add (inst);
}
return base.Visit (e);
}
private void Emit (Expr originalExpr, Instruction inst)
{
Instruction originalInst;
if (this.instructionLookup != null) {
// TODO: Doesn't handle inherited contracts - need to check what to do in this case.
//if (this.instructionLookup.TryGetValue (originalExpr, out originalInst)) {
// inst.SequencePoint = originalInst.SequencePoint;
//}
}
this.fnEmit (inst);
}
protected virtual Expr VisitCollection (IEnumerable<Expr> collection, Expr e, Func<IEnumerable<Expr>, Expr> fnCreateNew)
{
int index = 0;
List<Expr> exprs = null;
foreach (var expr in collection) {
Expr exprVisited = this.Visit (expr);
if (exprs != null || exprVisited != expr) {
if (exprs == null) {
exprs = new List<Expr> (collection.Take (index));
}
exprs.Add (exprVisited);
}
index++;
}
if (exprs == null) {
return e;
} else {
return fnCreateNew(exprs);
}
}
public ContractRequiresInfo (Expr originalExpr, Expr rewrittenExpr)
{
this.OriginalExpr = originalExpr;
this.RewrittenExpr = rewrittenExpr;
}
public ExprCompareGreaterThan CompareGreaterThan (Expr left, Expr right, Sn signage)
{
return new ExprCompareGreaterThan (this.methodInfo, left, right, signage);
}
public ExprCompareEqual (MethodInfo methodInfo, Expr left, Expr right)
: base (methodInfo, left, right, Sn.None)
{
}
public ExprBox Box (Expr exprToBox)
{
return new ExprBox (this.methodInfo, exprToBox);
}
public ExprCompareEqual CompareEqual (Expr left, Expr right)
{
return new ExprCompareEqual (this.methodInfo, left, right);
}
public ExprConv Conv (Expr exprToConvert, TypeCode convToType)
{
return new ExprConv (this.methodInfo, exprToConvert, convToType);
}
public ExprSub Sub (Expr left, Expr right, Sn signage, bool overflow)
{
return new ExprSub (this.methodInfo, left, right, signage, overflow);
}
public ExprBinaryOpArithmetic (MethodInfo methodInfo, Expr left, Expr right, Sn signage, bool overflow)
: base (methodInfo, left, right, signage)
{
this.Overflow = overflow;
}
private void RewriteIL (MethodBody body, Dictionary<Expr,Instruction> instructionLookup, Expr remove, Expr insert)
{
var il = body.CilWorker;
Instruction instInsertBefore;
if (remove != null) {
var vInstExtent = new InstructionExtentVisitor (instructionLookup);
vInstExtent.Visit (remove);
instInsertBefore = vInstExtent.Instructions.Last ().Next;
foreach (var instRemove in vInstExtent.Instructions) {
il.Remove (instRemove);
}
} else {
instInsertBefore = body.Instructions [0];
}
if (insert != null) {
var compiler = new CompileVisitor (il, instructionLookup, inst => il.InsertBefore (instInsertBefore, inst));
compiler.Visit (insert);
}
}
public ExprBinaryOpComparison (MethodInfo methodInfo, Expr left, Expr right, Sn signage)
: base (methodInfo, left, right, signage)
{
}
private void Emit (Expr originalExpr, Func<IEnumerable<Instruction>> fnCreateInstruction)
{
throw new NotImplementedException ();
}
public ExprBox (MethodInfo methodInfo, Expr exprToBox)
: base (methodInfo)
{
this.ExprToBox = exprToBox;
}
public ExprSub (MethodInfo methodInfo, Expr left, Expr right, Sn signage, bool overflow)
: base (methodInfo, left, right, signage, overflow)
{
}
private string GetConditionString (Expr e)
{
var vSource = new SourcePositionVisitor (this.instructionLookup);
vSource.Visit (e);
var extractor = new ConditionTextExtractor (vSource.SourceCodeFileName, vSource.StartPosition, vSource.EndPosition);
return extractor.GetConditionText ();
}
public override Expr Visit (Expr e)
{
Instruction inst;
if (this.instructionLookup.TryGetValue (e, out inst)) {
var seq = inst.SequencePoint;
if (seq != null) {
this.SourceCodeFileName = seq.Document.Url;
var instStart = new CodePosition(seq.StartLine, seq.StartColumn);
if (this.StartPosition.IsEmpty || instStart < this.StartPosition) {
this.StartPosition = instStart;
}
var instEnd = new CodePosition (seq.EndLine, seq.EndColumn);
if (this.EndPosition.IsEmpty || instEnd > this.EndPosition) {
this.EndPosition = instEnd;
}
}
}
return base.Visit (e);
}
private Expr ProcessCall (MethodReference method)
{
int paramCount = method.Parameters.Count;
Expr [] parameterExprs = new Expr [paramCount];
for (int i = 0; i < paramCount; i++) {
Expr parameter = this.exprs.Pop ();
parameterExprs [paramCount - i - 1] = parameter;
}
return this.gen.Call(method, parameterExprs);
}
private void Emit (Expr originalExpr, Func<Instruction> fnCreateInstruction)
{
Instruction inst = fnCreateInstruction();
this.Emit (originalExpr, inst);
}
protected Expr VisitCollection (Expr e, Func<IEnumerable<Expr>, Expr> fnCreateNew, params Expr [] collection)
{
return this.VisitCollection (collection, e, fnCreateNew);
}
public ExprCompareGreaterThan (MethodInfo methodInfo, Expr left, Expr right, Sn signage)
: base (methodInfo, left, right, signage)
{
}
public ExprConv (MethodInfo methodInfo, Expr exprToConvert, TypeCode convToType)
: base (methodInfo)
{
this.ExprToConvert = exprToConvert;
this.ConvToType = convToType;
}