Objects:
- provide IsExported, SameName, uniqueName methods
- clean up a lot of dependent code
Scopes:
- don't add children to Universe scope (!)
- document Node, WriteTo
Types:
- remove Deref in favor of internal function deref
ssa, ssa/interp:
- introduced local deref, adjusted code
- fixed some "Underlying" bugs (pun intended)
R=adonovan
CC=golang-dev
https://golang.org/cl/11232043
Eval and EvalNode permit the evaluation of an expression
or type literal string (or AST node in case of EvalNode)
within a given context (package and scope).
Also:
- track nested (children) scopes for all scopes
- provide a mechanism to iterate over nested scopes
- permit recursive printing of scopes
TODO: more tests
R=adonovan
CC=golang-dev
https://golang.org/cl/10748044
Tested implictly since its simply calling the
internal isAssignableTo which is used in every
assignment when testing the std library.
R=adonovan
CC=golang-dev
https://golang.org/cl/11189043
Yields a ~20% improvement in SSA construction time.
Also: better names for promotion wrapper functions.
R=gri
CC=golang-dev
https://golang.org/cl/11050043
go/types.Type has an equivalence relation (IsIdentical) that
is not consistent with the equivalence relation implemented by
Go's == operator for Types. Therefore extra work is required
to build a map whose keys are types. This package does that
work.
Has simple unit test. More tests might be good.
R=gri
CC=golang-dev
https://golang.org/cl/9649044
- consolited remainign assignment check routines
- removed more dead code
- fixed incorrect scope hierarchy in case of errors for some statements
- fixed scope of key iteration variable for range clauses
R=adonovan
CC=golang-dev
https://golang.org/cl/10694044
Various bug fixes:
- don't allow := to redeclare non-variables
- don't permit a comma-ok expression as a two-value function return
Lots of dead code removed.
Fixesgolang/go#5500.
R=adonovan
CC=golang-dev
https://golang.org/cl/10792044
Instead of passing around iota everywhere, keep track of the
current value in the checker, and update it when entering
different declarations. This is less explicit, but the improvement
over all code is so significant that it is worth it.
R=adonovan
CC=golang-dev
https://golang.org/cl/10814044
- moved ident and typ expr checking into typexpr.go
- as a result, fewer parameters are needed for expr checking
- forward-chain type decls of the form type ( A B; B C; C *A) etc.
so that cycles are getting the right types in all cases
- fixed several corner case bugs, added more test cases
R=adonovan
CC=golang-dev
https://golang.org/cl/10773043
Fixed one aspect of issue 5090. Fixing it completely
requires a bit more work around the representation of
interface types.
R=adonovan
CC=golang-dev
https://golang.org/cl/10678045
Removed special case for testdata/test.go file in favor of
a simpler, more flexible, and explicit flag for one-off test
packages.
R=adonovan
CC=golang-dev
https://golang.org/cl/10618044
- LookupFieldOrMethod now computes if any indirection was found on the
way to an embedded field/method: this is the only information required
to determine if a result method is in the method set.
- Scopes now provide a link to the ast.Node responsible for them.
Also:
- don't permit unsafe.Offsetof on method values
- report ambiguities in field/method lookup errors
- added some missing checks for anonymous fields
- lots of new tests
Fixesgolang/go#5499.
R=adonovan
CC=golang-dev
https://golang.org/cl/10411045
- much simpler lookup
- more result information
- will make tracking of pointer-ness easier
TODO: apply the same changes to method set computation
R=adonovan
CC=golang-dev
https://golang.org/cl/10379049
- moved single field and method lookup functionality
from operand.go to new file lookup.go and cleaned
up the lookup implementation
- implemented method set computation using the same
basic structure as for field/method lookup, in new
file methodset.go
- minor related changes
- the method set computation ignores pointer-ness of
the receiver type at the moment (next CL)
- fixed a couple of bugs (missing pkg info for imported
embedded types, wrong test for method expressions)
The method set computation is currently verified by
comparing a regular method lookup with a method-set
based method lookup.
R=adonovan
CC=golang-dev
https://golang.org/cl/10235049
methodIndex() utility was split and specialized to its two
cases, *Interface vs *Named, which are logically quite
different.
We can't memoize promotion wrappers yet; we need typemap.
Terminology:
- "thunks" are now "wrappers"
- "bridge methods" are now "promotion wrappers"
Where the diff is messy it's just because of indentation.
R=gri
CC=golang-dev
https://golang.org/cl/10282043
This partially reverts a previous change, using a []*Field is a better
representation for struct fields than a *Scope, after all; however
*Fields remain Objects.
Fixesgolang/go#5670.
R=adonovan, axwalk
CC=golang-dev
https://golang.org/cl/10207043
- Imported objects that are explicitly exported may have a nil package;
don't use it for qualified name computation (it's not needed).
- isAssignable must check all possibilities before declaring failure.
Fixesgolang/go#5675.
R=adonovan
CC=golang-dev
https://golang.org/cl/10141044
PLEASE NOTE: the APIs for both "importer" and "ssa" packages
will continue to evolve and both need some polishing; the key
thing is that this CL splits them.
The go.types/importer package contains contains the Importer,
which takes care of the mechanics of loading a set of packages
and type-checking them. It exposes for each package a
PackageInfo containing:
- the package's ASTs (i.e. the input to the typechecker)
- the types.Package object
- the memoization of the typechecker callbacks for identifier
resolution, constant folding and expression type inference.
Method-set computation (and hence bridge-method creation) is
now moved to after creation of all packages: since they are no
longer created in topological order, we can't guarantee the
needed delegate methods exist yet.
ssa.Package no longer has public TypeOf, ObjectOf, ValueOf methods.
The private counterparts are valid only during the build phase.
Also:
- added to go/types an informative error (not crash) for an
importer() returning nil without error.
- removed Package.Name(), barely needed.
- changed Package.String() slightly.
- flag what looks like a bug in makeBridgeMethod. Will follow up.
R=golang-dev, gri
CC=golang-dev
https://golang.org/cl/9898043
- First step towards unified use of scopes. Will enable
further simplifications.
- Removed various ForEach iterators in favor of the existing
accessor methods, for a thinner API.
- Renamed outer/Outer to parent/Parent for scopes.
- Removed check.lookup in favor of Scope.LookupParent.
R=adonovan
CC=golang-dev
https://golang.org/cl/9862044
Also:
- more cleanup of new identifier resolution code
- removed residue Object.Pos() code
- two separate, equally formatted error messages for redeclaration
errors for easier tool support
- initial support for labels
- enabled several disabled tests
Thic CL will break go.tools/ssa/interp, but the pending
CL 9863045 fixes that.
Fixesgolang/go#5504.
R=adonovan
CC=golang-dev
https://golang.org/cl/9839045
By setting resolve = true in check.go, the type checker
will do all identifier resolution during type checking
time and ignore (and not depend on) parser objects. This
permits the type checker to run easily on ASTs that are
not generated with invariants guaranteed by the parser.
There is a lot of new code; much of it slightly modified
copies of old code. There is also a lot of duplication.
After removing the dead code resulting from resolve = true
permanently (and removing the flag as well), it will be
easier to perform a thorough cleanup. As is, there are
too many intertwined code paths.
For now resolve = false. To be enabled in a successor CL.
R=adonovan
CC=golang-dev
https://golang.org/cl/9606045
They will be deleted from their current homes once this has landed.
Changes made to import paths to make the code compile, and to find
errchk in the right place in cmd/vet's Makefile.
TODO in a later CL: tidy up vet.
R=golang-dev, gri
CC=golang-dev
https://golang.org/cl/9495043
Robert Griesemer
Alan Donovan
Rob Pike