/// </summary>
public bool InEnumContext;
- /// <summary>
- /// Anonymous methods can capture local variables and fields,
- /// this object tracks it. It is copied from the TopLevelBlock
- /// field.
- /// </summary>
- public CaptureContext capture_context;
-
public readonly IResolveContext ResolveContext;
/// <summary>
/// The current iterator
/// </summary>
-#if GMCS_SOURCE
public Iterator CurrentIterator {
- get {
- if (CurrentAnonymousMethod != null)
- return CurrentAnonymousMethod.Iterator;
- else
- return null;
- }
+ get { return CurrentAnonymousMethod as Iterator; }
}
-#else
- public Iterator CurrentIterator;
-#endif
/// <summary>
/// Whether we are in the resolving stage or not
public override string ToString ()
{
- return String.Format ("EmitContext ({0}:{1}:{2})", id,
- CurrentIterator, capture_context, loc);
+ return String.Format ("EmitContext ({0}:{1})", id,
+ CurrentAnonymousMethod, loc);
}
public EmitContext (IResolveContext rc, DeclSpace parent, DeclSpace ds, Location l, ILGenerator ig,
get { return current_flow_branching; }
}
- public bool HaveCaptureInfo {
- get { return capture_context != null; }
- }
-
- public void EmitScopeInitFromBlock (Block b)
- {
- if (capture_context != null)
- capture_context.EmitScopeInitFromBlock (this, b);
- }
-
// <summary>
// Starts a new code branching. This inherits the state of all local
// variables and parameters from the current branching.
current_flow_branching = current_flow_branching.Parent;
}
- public void CaptureVariable (LocalInfo li)
- {
- capture_context.AddLocal (CurrentAnonymousMethod, li);
- li.IsCaptured = true;
- }
-
- public void CaptureParameter (string name, Type t, int idx)
- {
- capture_context.AddParameter (this, CurrentAnonymousMethod, name, t, idx);
- }
-
- public void CaptureThis ()
+ public bool MustCaptureVariable (LocalInfo local)
{
- capture_context.CaptureThis (CurrentAnonymousMethod);
- }
-
-
- //
- // Use to register a field as captured
- //
- public void CaptureField (FieldExpr fe)
- {
- capture_context.AddField (this, CurrentAnonymousMethod, fe);
- }
-
- //
- // Whether anonymous methods have captured variables
- //
- public bool HaveCapturedVariables ()
- {
- if (capture_context != null)
- return capture_context.HaveCapturedVariables;
- return false;
- }
-
- //
- // Whether anonymous methods have captured fields or this.
- //
- public bool HaveCapturedFields ()
- {
- if (capture_context != null)
- return capture_context.HaveCapturedFields;
- return false;
- }
-
- //
- // Emits the instance pointer for the host method
- //
- public void EmitMethodHostInstance (EmitContext target, AnonymousMethod am)
- {
- if (capture_context != null)
- capture_context.EmitMethodHostInstance (target, am);
- else if (IsStatic)
- target.ig.Emit (OpCodes.Ldnull);
- else
- target.ig.Emit (OpCodes.Ldarg_0);
- }
-
- //
- // Returns whether the `local' variable has been captured by an anonymous
- // method
- //
- public bool IsCaptured (LocalInfo local)
- {
- return capture_context.IsCaptured (local);
- }
-
- public bool IsParameterCaptured (string name)
- {
- if (capture_context != null)
- return capture_context.IsParameterCaptured (name);
- return false;
+ if (CurrentAnonymousMethod == null)
+ return false;
+ if (CurrentAnonymousMethod.IsIterator)
+ return true;
+ return local.Block.Toplevel != CurrentBlock.Toplevel;
}
public void EmitMeta (ToplevelBlock b)
{
- if (capture_context != null)
- capture_context.EmitAnonymousHelperClasses (this);
b.EmitMeta (this);
if (HasReturnLabel)
if (resolved)
return true;
- capture_context = block.CaptureContext;
-
if (!loc.IsNull)
CurrentFile = loc.File;
if (!block.ResolveMeta (this, ip))
return false;
+ if ((md != null) && (md.Iterator != null)) {
+ if (!md.Iterator.Resolve (this))
+ return false;
+ }
+
using (this.With (EmitContext.Flags.DoFlowAnalysis, true)) {
FlowBranchingToplevel top_level;
if (anonymous_method_host != null)
return false;
} else if (!CurrentAnonymousMethod.IsIterator) {
Report.Error (1643, CurrentAnonymousMethod.Location, "Not all code paths return a value in anonymous method of type `{0}'",
- CurrentAnonymousMethod.GetSignatureForError ());
+ CurrentAnonymousMethod.GetSignatureForError ());
return false;
}
}
- block.CompleteContexts ();
+ if (!block.CompleteContexts (this))
+ return false;
+
resolved = true;
return true;
}
ig.Emit (OpCodes.Ret);
}
}
-
- //
- // Close pending helper classes if we are the toplevel
- //
- if (capture_context != null && capture_context.ParentToplevel == null)
- capture_context.CloseAnonymousHelperClasses ();
}
/// <summary>
HasReturnLabel = true;
}
- //
- // Emits the proper object to address fields on a remapped
- // variable/parameter to field in anonymous-method/iterator proxy classes.
- //
- public void EmitThis (bool need_address)
- {
- ig.Emit (OpCodes.Ldarg_0);
- if (capture_context != null && CurrentAnonymousMethod != null){
- ScopeInfo si = CurrentAnonymousMethod.Scope;
- while (si != null){
- if (si.ParentLink != null)
- ig.Emit (OpCodes.Ldfld, si.ParentLink);
- if (si.THIS != null){
- if (need_address && TypeManager.IsValueType (si.THIS.FieldType))
- ig.Emit (OpCodes.Ldflda, si.THIS);
- else
- ig.Emit (OpCodes.Ldfld, si.THIS);
- break;
- }
- si = si.ParentScope;
- }
- }
- }
-
- //
- // Emits the code necessary to load the instance required
- // to access the captured LocalInfo
- //
- public void EmitCapturedVariableInstance (LocalInfo li)
- {
- if (capture_context == null)
- throw new Exception ("Calling EmitCapturedContext when there is no capture_context");
-
- capture_context.EmitCapturedVariableInstance (this, li, CurrentAnonymousMethod);
- }
-
- public void EmitParameter (string name, bool leave_copy, bool prepared, ref LocalTemporary temp)
- {
- capture_context.EmitParameter (this, name, leave_copy, prepared, ref temp);
- }
-
- public void EmitAssignParameter (string name, Expression source, bool leave_copy, bool prepare_for_load, ref LocalTemporary temp)
- {
- capture_context.EmitAssignParameter (this, name, source, leave_copy, prepare_for_load, ref temp);
- }
- public void EmitAddressOfParameter (string name)
- {
- capture_context.EmitAddressOfParameter (this, name);
- }
-
public Expression GetThis (Location loc)
{
This my_this;
projects / mono.git / commitdiff