-TODO:
+NEW NOTES:
+----------
- 1. Create a "partial" emit context for each TypeContainer..
+ ImplicitStandardConversionExists and ImplicitStandardConversion
+ should always be the same, but there are a few diverging lines that
+ must be studied:
- 2. EmitContext should be partially constructed. No IL Generator.
+ if (expr_type == target_type && !(expr is NullLiteral))
+ return expr;
- Optimize the internal type expressions in the parser (system_object, etc)
- to be something other than DecomposeQI-based expressions.
+ vs:
- interface_type review.
+ if (expr_type == target_type)
+ return true;
- parameter_array, line 952: `note: must be a single dimension array type'. Validate this
-Dead Code Elimination bugs:
+Null Type
+---------
+
+ Need to introduce the NullType concept into the compiler, to address a
+ few small buglets and remove the hardcoded values for NullLiteral.
+
+ NullLiteral will be the only expression that has the NullType as its type.
+
+ This is what must be used to test for Null literals, instead of `is NullLiteral',
+ and this will introduce a couple of fixes to the rules.
+
+ Revert Martin's patch to Conditional expression that worked around this bug:
+
+ Reference r = xx ? null : null
+
+ The right fix is to introduce NullType
+
+****************************************************************************************
+*
+* The information on the rest of this file is mostly outdated, and its kept here for
+* historical reasons
+*
+****************************************************************************************
+
+Error Reporting:
+----------------
+
+ * Make yyerror show a nice syntax error, instead of the current mess.
+
+Iterators
+---------
+
+ * Reset should throw not implemented now.
+
+Optimization ideas
+------------------
+
+ Currently when we build a type cache, it contains private members,
+ internal members, and internal protected members; We should trim
+ these out, as it shows up on the profile.
+
+ We create too many Arraylists; When we know the size, we should create
+ an array;
+
+ During parsing we use arraylists to accumulate data, like this:
+
+ thing:
+
+ thing_list
+ : thing { $$ =new ArrayList (); $$.Add ($1); }
+ | thing_list thing { ArrayList a = $1; a.Add ($2); $$ = a; }
+
+ We probably could start using "Pairs" there:
+
+ thing_list
+ : thing { $$ = new Pair ($1, null); }
+ | thing_list thing { Pair p = $1; $$ = new Pair ($2, $1); }
+
+
+EmitContext.ResolveTypeTree
---------------------------
- I should also resolve all the children expressions in Switch, Fixed, Using.
+ We should investigate its usage. The problem is that by default
+ this will be set when calling FindType, that triggers a more expensive
+ lookup.
-Major tasks:
-------------
+ I believe we should pass the current EmitContext (which has this turned off
+ by default) to ResolveType/REsolveTypeExpr and then have the routines that
+ need ResolveType to pass null as the emit context.
- Pinned and volatile require type modifiers that can not be encoded
- with Reflection.Emit.
+DeclareLocal audit
+------------------
- Properties and 17.6.3: Finish it.
+ DeclareLocal is used in various statements. The audit should be done
+ in two steps:
- Implement base indexer access.
+ * Identify all the declare locals.
-readonly variables and ref/out
-
-BUGS
-----
+ * Identify its uses.
-* We suck at reporting what turns out to be error -6. Use the standard error message
- instead.
+ * Find if we can make wrapper functions for all of them.
-* Explicit indexer implementation is missing.
+ Then we can move DeclareLocal into a helper class.
-* Check for Final when overriding, if the parent is Final, then we cant
- allow an override.
+ This is required to fix foreach in iterators.
-* Interface indexers
+Large project:
+--------------
- I have not figured out why the Microsoft version puts an
- `instance' attribute, and I am not generating this `instance' attribute.
+ Drop FindMembers as our API and instead extract all the data
+ out of a type the first time into our own datastructures, and
+ use that to navigate and search the type instead of the
+ callback based FindMembers.
- Explanation: The reason for the `instance' attribute on
- indexers is that indexers only apply to instances
+ Martin has some some of this work with his TypeHandle code
+ that we could use for this.
-* Indexer bugs:
+Ideas:
+------
- the following wont work:
+ Instead of the hack that *knows* about System.Object not having any children classes,
+ we should just make it simple for a probe to know that there is no need for it.
- x [0] = x [1] = N
+Dead Code Elimination bugs:
+---------------------------
- if x has indexers, the value of x [N] set is set to void. This needs to be
- fixed.
+ I should also resolve all the children expressions in Switch, Fixed, Using.
-* Array declarations
+Major tasks:
+------------
+ Properties and 17.6.3: Finish it.
- Multi-dim arrays are declared as [,] instead of [0..,0..]
+readonly variables and ref/out
+
+BUGS
+----
* Break/Continue statements
Method registration should only be used to register methodbuilders,
we need an alternate method of checking for duplicates.
-* We need to catch:
-
- extern string Property {
- get { }
- }
-
- The get there should only have a semicolon
-
*
> // CSC sets beforefieldinit
> class X {
PENDING TASKS
-------------
-* IMprove error handling here:
-
- public static Process ()
-
- THat assumes that it is a constructor, check if its the same name
- as the class, if not report a different error than the one we use now.
-
* Merge test 89 and test-34
-* Revisit
-
- Primary-expression, as it has now been split into
- non-array-creation-expression and array-creation-expression.
-
-* Static flow analysis
-
- Required to warn about reachability of code and definite
- assignemt as well as missing returns on functions.
-
* Code cleanup
The information when registering a method in InternalParameters
Handle modreq from public apis.
-* Emit `pinned' for pinned local variables.
-
- Both `modreq' and pinned will require special hacks in the compiler.
-
-* Make sure that we are pinning the right variable
-
-* Maybe track event usage? Currently I am not tracking these, although they
- are fields.
-
* Merge tree.cs, rootcontext.cs
OPTIMIZATIONS
-------------
-* Implement loop inversion for `For' as well.
-
-* There is too much unshared code between MemberAccess.Resolve and SimpleName
- resolve.
-
* User Defined Conversions is doing way too many calls to do union sets that are not needed
* Add test case for destructors
The only pending problem is that the code that implements Aliases
is on TypeContainer, and probably should go in DeclSpace.
-* Casts need to trigger a name resolution against types only.
-
- currently we use a secret hand shake, probably we should use
- a differen path, and only expressions (memberaccess, simplename)
- would participate in this protocol.
-
-* Use of local temporary in UnaryMutator
-
- We should get rid of the Localtemporary there for some cases
-
-* Emitcontext
-
- Do we really need to instanciate this variable all the time?
-
- It could be static for all we care, and just use it for making
- sure that there are no recursive invocations on it.
-
-* Use of EmitBranchable
-
- Currently I use brfalse/brtrue in the code for statements, instead of
- using the EmitBranchable function that lives in Binary
-
-* ConvertImplicit
-
- Currently ConvertImplicit will not catch things like:
-
- - IntLiteral in a float context to generate a -FloatLiteral.
- Instead it will perform an integer load followed by a conversion.
-
* Tests
Write tests for the various reference conversions. We have
test for all the numeric conversions.
-* Optimizations
-
- In Indexers and Properties, probably support an EmitWithDup
- That emits the code to call Get and then leaves a this pointer
- in the stack, so that later a Store can be emitted using that
- this pointer (consider Property++ or Indexer++)
-
* Optimizations: variable allocation.
When local variables of a type are required, we should request
* Add a cache for the various GetArrayMethod operations.
-* TypeManager.FindMembers:
-
- Instead of having hundreds of builder_to_blah hash table, have
- a single one that maps a TypeBuilder `t' to a set of classes
- that implement an interface that supports FindMembers.
-
* MakeUnionSet Callers
If the types are the same, there is no need to compute the unionset,
we can just use the list from one of the types.
-* Factor all the FindMembers in all the FindMembers providers.
-
* Factor the lookup code for class declarations an interfaces
(interface.cs:GetInterfaceByName)
Notice how numbering of the arguments changes as the
{ oob_stack.Push (lexer.Location) } takes a "slot" in the productions.
-* local_variable_declaration
-
- Not sure that this grammar is correct, we might have to
- resolve this during semantic analysis.
-
-* Idea
-
- MethodGroupExpr
-
- These guys should only appear as part of an Invocation, so we
- probably can afford to have a special callback:
-
- Expression.ResolveAllowMemberGroups
-
- This is only called by Invocation (or anyone that consumes
- MethodGroupExprs)
-
- And the regular DoResolve and DoResolveLValue do emit the error
- 654 `Method referenced without argument list'.
- Otherwise, a resolution will return a MethodGroupExpr which is
- not guaranteed to have set its `Expression.Type' to a non-null
- value.
projects / mono.git / blobdiff