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- Address some easy TODOs.
- Remove some TODOs that are not correct anymore or are unimportent.
- Simplify some code on the way.
Change-Id: I4d20de3725b3a735022afe022cbc002b2798936d
Reviewed-on: https://go-review.googlesource.com/c/go/+/345176
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
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Change-Id: Iaaa2a3b462da6b121f13a10595950a8502b5f271
Reviewed-on: https://go-review.googlesource.com/c/go/+/342690
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
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Instantiate and InstantiateLazy have the same signature; on first
principles, if Instantiate should work for importers it should be
possible to consolidate these APIs.
This CL does this. In order to make it work, a typMap needs to be
threaded through type expansion to prevent infinite recursion in the
case that the Checker is nil.
Notably, Named types now must be expanded before returning from
Underlying(). This makes Underlying generally unsafe to call while type
checking a package, so a helper function safeUnderlying is added to
provide the previous behavior. This is probably overly conservative at
most call sites, but cleanup is deferred to a later CL.
Change-Id: I03cfb75bea0750862cd6eea4e3cdc875a7daa989
Reviewed-on: https://go-review.googlesource.com/c/go/+/341855
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*Named types
Now that the pointer identity for a *Named type doesn't change
anymore when going from lazy instantiated to actually instantiated
(= expanded) state, expand() only needs to be called when we deal
with *Named types and only if we care about a *Named type's internals.
Remove the expand function and respective calls for all types and
replace with specific t.expand() method calls where t is a *Named.
Change-Id: If82299360d60108b00adc4013b29399aec90b940
Reviewed-on: https://go-review.googlesource.com/c/go/+/340749
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Change-Id: If25ceb2aa403b94608760be331faa2aff11c47cc
Reviewed-on: https://go-review.googlesource.com/c/go/+/333890
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type parameter type
For #43671
Change-Id: I7db4b3886fab44ec0de7c0935e0ab21c26e3335c
Reviewed-on: https://go-review.googlesource.com/c/go/+/333709
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in various cases (cleanup)
This makes the behavior for type parameter operands explicit
in those cases.
Change-Id: I38438af67de4432f1a691dc4947e4576445f031b
Reviewed-on: https://go-review.googlesource.com/c/go/+/332555
Trust: Robert Griesemer <gri@golang.org>
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arguments (cleanup)
Simplified names and unnecessary function indirections where possible.
Change-Id: I1c7a386393d086fd7ad29f892e03f048781f3547
Reviewed-on: https://go-review.googlesource.com/c/go/+/331512
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for interfaces
With this change, interfaces are "completed" on-demand, when needed,
and the respective information (set of all methods, type constraints)
is recorded in a new typeSet data structure.
As a consequence, interfaces don't need to be explicitly completed
anymore and (internal) uses of interfaces have become much simpler.
This change also introduces a new field Interface.complete to indicate
that all methods and embedded elements have been set up. This prevent
the computation and recording (!) of a partial type set for erroneous
programs (if we compute the partial type set and store it, subsequent
type set accesses use the wrong type set which may lead to follow-on
errors).
Change-Id: I1ffc907f7d0fb93b3e987fe5ff9c6fa5cae00d7f
Reviewed-on: https://go-review.googlesource.com/c/go/+/329309
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untyped operation
This ports the fix in CL 328050 for typecheck to types2.
The fix is not identical, due to code structure differences between
typecheck and types2, but the idea is the same. We only do the untyped
conversion when both operands can be mixed.
Updates #46749
Change-Id: Ib2c63ba0d5dd8bf02318b1bfdfe51dcaeeeb7f82
Reviewed-on: https://go-review.googlesource.com/c/go/+/328053
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- We still mostly ignore the tilde information.
- More consistent naming: A Union term is the pair (type, tilde).
Rename Union.terms to Union.types; the Union.types and Union.tilde
slices make up the Union terms.
- Replace Sum.is with Union.underIs: underIs iterates through all
union terms and calls its argument function with the underlying
type of the term (and thus can ignore the tilde information).
This also eliminates the need to call under in the argument
function.
- Added Union.is for situations where we need to consider the tilde
information for each Union term.
Change-Id: I70fcf1813e072651dc0f61d52d5555642ee762fd
Reviewed-on: https://go-review.googlesource.com/c/go/+/323274
Trust: Robert Griesemer <gri@golang.org>
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This is a modified port of the https://golang.org/cl/313909
change for go/types.
- add catch-all cases for unexpected expression lists
- add Checker.singleIndex function to check single indices
- better syntax error handling in parser for invalid type
instantiations that are missing a type argument
Change-Id: I6f0f396d637ad66b79f803d886fdc20ee55a98b3
Reviewed-on: https://go-review.googlesource.com/c/go/+/314409
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Updates #45783.
Change-Id: Id552a60f262e2da62125acd6aec0901a82f5a29a
Reviewed-on: https://go-review.googlesource.com/c/go/+/313650
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Also, factor out recording of type/value information after
evaluating an expression into an operand, so that we can
use it when handling instantiation expressions manually.
Change-Id: I6776e6cc243558079d6a203f2fe0a6ae0ecc33de
Reviewed-on: https://go-review.googlesource.com/c/go/+/308371
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First step towards lightening the load of Checker.exprInternal by
factoring out the code for index and slice expressions; incl. moving
a couple of related methods (Checker.index, Checker.indexedElts).
The code for handling index/slice expressions is copied 1:1 but
occurrences of "goto Error" are replaced by "x.mode = invalid"
followed by a "return".
Change-Id: I44048dcc4851dc5e24f5f169c17f536a37a6a676
Reviewed-on: https://go-review.googlesource.com/c/go/+/308370
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Now that we use square brackets for instantiations, we
can tell type arguments from ordinary arguments without
"guessing" which permits a simpler implementation.
Specifically, replace use of Checker.exprOrTypeList with
Checker.exprList, and delete Checker.exprOrTypeList and
Checker.multiExprOrType.
Disable a test for an (esoteric) failure due to an
unrelated problem with error matching when running
the test.
Change-Id: I17f18fffc32f03fa90d93a68ebf56e5f2fcc9dab
Reviewed-on: https://go-review.googlesource.com/c/go/+/306171
Trust: Robert Griesemer <gri@golang.org>
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This moves the two helper functions startPos and endPos into
the syntax package where they belong. Export the functions and
adjust dependent code.
Change-Id: I8170faeadd7cfa8f53009f81fcffd50ec0fc6a98
Reviewed-on: https://go-review.googlesource.com/c/go/+/305578
Trust: Robert Griesemer <gri@golang.org>
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The value is always 'false'. Brings the code closer in line with go/types.
Follow-up on https://golang.org/cl/304129.
Change-Id: I8bea550033f3187b44e9a54258e0cf642c11c369
Reviewed-on: https://go-review.googlesource.com/c/go/+/304849
Trust: Robert Griesemer <gri@golang.org>
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The changes between (equivalent, and reviewed) go/types/expr.go
and expr.go can be seen by comparing patchset 1 and 2. The actual
changes are removing the "// UNREVIEWED" marker.
The primary differences to go/types/expr.go are:
- use of package syntax rather than ast
- no reporting of error codes in errors
- implicit conversions of untyped nil lead to a typed nil
(in go/types, nil remains untyped)
Change-Id: I1e235b20ebda597eb7ce597d1749f26431addde2
Reviewed-on: https://go-review.googlesource.com/c/go/+/303092
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Based on https://golang.org/cl/284256 for go/types.
Brings this code more in line with go/types.
Adjusted various tests to match new error messages which
generally are now better: for assignment errors, instead
of a generic "cannot convert" we now say "cannot use"
followed by a clearer reason as to why not.
Major differences to go/types with respect to the changed
files:
- Some of the new code now returns error codes, but they
are only used internally for now, and not reported with
errors.
- go/types does not "convert" untyped nil values to target
types, but here we do. This is unchanged from how types2
handled this before this CL.
Change-Id: If45336d7ee679ece100f6d9d9f291a6ea55004d8
Reviewed-on: https://go-review.googlesource.com/c/go/+/302757
Trust: Robert Griesemer <gri@golang.org>
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checking against type parameters
Don't eagerly record the target type for an untyped operand if the
target type is just one of possibly many types in the type list of
a type parameter. Instead, record expression type only after we
checked that all types in the type list are ok.
Also, update assertion in Checker.recordTypeAndValue since (currently),
a type parameter is not considered a const type. We may change that,
eventually.
This is a temporary (but working) solution. Eventually we should
copy the approach taken in go/types.
Fixes #45096.
Change-Id: Icf61ee893aca6ead32bfc45ee5831572e672357b
Reviewed-on: https://go-review.googlesource.com/c/go/+/302755
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- Remove specialized errorf functions for invalid AST/argument/operation.
Instead use prefix constants with the error message.
- Replace several calls to Checker.errorf with calls to Checker.error
if there are no arguments to format.
- Replace a handful of %s format verbs with %v to satisfy vet check.
- Add a basic test that checks that we're not using Checker.errorf when
we should be using Checker.error.
Change-Id: I7bc7c14f3cf774689ec8cd5782ea31b6e30dbcd6
Reviewed-on: https://go-review.googlesource.com/c/go/+/300995
Trust: Robert Griesemer <gri@golang.org>
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way as in go/types
Minor adjustment to match go/types more closely.
Change-Id: Id79c51f0ecd8cda0f5b68f6e961500f7f22f7115
Reviewed-on: https://go-review.googlesource.com/c/go/+/294270
Reviewed-by: Robert Findley <rfindley@google.com>
Trust: Robert Griesemer <gri@golang.org>
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favor of function
This removes the need for the aType embedded type and brings the types2.Type
API in sync with the go/types.Type API.
For reasons not fully understood yet, introducing the new under function
causes a very long initialization cycle error, which doesn't exist in
go/types. For now, circumvent the problem through a helper function variable.
This CL also eliminates superflous (former) Under() method calls
inside optype calls (optype takes care of this).
Plus some minor misc. cleanups and comment adjustments.
Change-Id: I86e13ccf6f0b34d7496240ace61a1c84856b6033
Reviewed-on: https://go-review.googlesource.com/c/go/+/293470
Reviewed-by: Robert Findley <rfindley@google.com>
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methods with functions
This removes two more converter methods in favor of functions.
This further reduces the API surface of types2.Type and matches
the approach taken in go/types.
Change-Id: I3cdd54c5e0d1e7664a69f3697fc081a66315b969
Reviewed-on: https://go-review.googlesource.com/c/go/+/293292
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than methods
This change replaces methods with functions to reduce the API surface of
types2.Type and to match the approach taken in go/types. The converter
methods for Named and TypeParam will be addressed in a follow-up CL.
Also: Fixed behavior of optype to return the underlying type for
arguments that are not type parameters.
Change-Id: Ia369c796754bc33bbaf0c9c8478badecb729279b
Reviewed-on: https://go-review.googlesource.com/c/go/+/293291
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version checking
Add the Config.Lang field which may be set to a Go version string,
such as "go1.12". This is a string rather than explicit semantic
version numbers (such as {1, 12}) for API robustness; a string
is more flexible should we need more or different information.
Add -lang flag to types2 package for use with (manual) testing
when running "go test -run Check$ -lang=... -files=...".
While changing flags, look for comma-separated (rather than space-
separated) files when providing the -file flag.
Check that numeric constant literals, signed shift counts are
accepted according to the selected language version.
Type alias declarations and overlapping embedded interfaces are
not yet checked.
Updates #31793.
Change-Id: I9ff238ed38a88f377eb2267dc3e8816b89a40635
Reviewed-on: https://go-review.googlesource.com/c/go/+/289509
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precision
This matches the compiler's existing limitations and thus ensures
that types2 reports the same errors for oversize integer constants.
Change-Id: I4fb7c83f3af69098d96f7b6c53dbe3eaf6ea9ee4
Reviewed-on: https://go-review.googlesource.com/c/go/+/288633
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The compiler uses 512 bit of precision for untyped constant
arithmetic but didn't restrict the length of incoming constant
literals in any way, possibly opening the door for excessively
long constants that could bring compilation to a crawl.
Add a simple check that refuses excessively long constants.
Add test.
Change-Id: I797cb2a8e677b8da2864eb92d686d271ab8a004d
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arithmetic overflow
Factor out the existing "constant representation" check after
untyped constant arithmetic and combine with an overflow check.
Use a better heuristic for determining the error position if we
know the error is for a constant operand that is the result of an
arithmetic expression.
Related cleanups.
With this change, untyped constant arithmetic reports an error
when (integer) constants become too large (> 2048 bits). Before,
such arithmetic was only limited by space and time.
Change-Id: Id3cea66c8ba697ff4c7fd1e848f350d9713e3c75
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constants via tables
This makes the respective files match the respective go/types files
a tad more.
Change-Id: Ie555e18ed23c493379a1e56b96276867190106f0
Reviewed-on: https://go-review.googlesource.com/c/go/+/287492
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Represent x++/-- as x +=/-= with the RHS of the assignment being nil
rather than syntax.ImplicitOne.
Dependent code already had to check for syntax.ImplicitOne, but
then shared some existing code for regular assignment operations.
Now always handle this case fully explicit, which simplifies the
code.
Change-Id: I28c7918153c27cbbf97b041d0c85ff027c58687c
Reviewed-on: https://go-review.googlesource.com/c/go/+/285172
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context
With this CL, the type reported for uses of the predeclared
identifier nil changes from untyped nil to the type of the
context within which nil is used, matching the behaviour of
types2 for other untyped types.
If an untyped nil value is assigned or converted to an
interface, the nil expression is given the interface type.
The predicate TypeAndValue.IsNil doesn't change in behavior,
it still reports whether the relevant expression is a (typed
or untyped) nil value.
Change-Id: Id766468f3f3f2a53e4c55e1e6cd521e459c4a94f
Reviewed-on: https://go-review.googlesource.com/c/go/+/284218
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as "untyped nil"
This fixes an inconsistency where the type for nil in code such as
var x unsafe.Pointer = nil
and in conversions of the form
T(nil)
(where T is a pointer, function, slice, map, channel, interface, or
unsafe.Pointer) was reported as (converted to) the respective type.
For all other operations that accept a nil value, we don't do this
conversion for nil.
(We never change the type of the untyped nil value, in contrast to
other untyped values where we give the values context-specific types.)
It may still be useful to change this behavior and - consistently -
report a converted nil type like we do for any other type, but for
now this CL simply fixes the existing inconsistency.
Added tests and fixed existing test harness.
Updates #13061.
Change-Id: Ia82832845c096e3cbc4a239ba3d6c8b9a9d274c9
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into uint
Updates #43697.
Change-Id: If94658cb798bb0434ac3ebbf9dff504dcd59a02a
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invalid ... use
This partially addresses the issue below: In many (all) cases we want to
handle invalid ... use in the parser as a syntax error; but this ensures
that we get a decent error if we get here anyway.
Updates #43680.
Change-Id: I93af43a5f5741d8bc76e7a13c0db75e6edf43111
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bad strings
If the parser reported an error for (string) literals, don't report
a second error during type checking.
This should have a couple of tests but they are tricky to arrange
with the current testing framework as the ERROR comment cannot be
on the line where the string. But the change is straightforward
and we have test/fixedbugs/issue32133.go that is passing now.
Change-Id: I0cd7f002b04e4092b8eb66009c7413288c8bfb23
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missing key
Use the Key position of a syntax.KeyValueExpr (not the position of the
":") when reporting an error for a missing key.
(In go/types, the KeyValueExpr position is the start of the expression
not the ":", so there this works as expected.)
Change-Id: I74147d245927847274cf4e53b4f03dbb5110c324
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for compiler
Triaged and adjusted more test/fixedbugs/* tests.
Change-Id: I80b9ead2445bb8d126b7d79db4bea9ddcb225a84
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for compiler
Also: Triaged/adjusted some more test/fixedbugs tests.
Change-Id: Idaba1875273d6da6ef82dd8de8edd8daa885d32c
Reviewed-on: https://go-review.googlesource.com/c/go/+/276472
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match the compiler
Change-Id: I04bd7b294de4ed0fb01bc0609e09debea2d797bd
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compiler error messages
In order to get types2 usable by the compiler, we need to
pass all the compiler tests with respect to error messages.
Sometimes the compiler error messages are better, sometimes
the types2 error messages are better. Where we can, we decide
on a case-by-case basis; but sometimes, for expediency's sake,
we just choose the compiler error message as it may reduce the
amount of tests that we need to update.
This CL introduces a new Config flag: CompilerErrorMessages.
If set, the typechecker emits an error message that matches
the expected errors in the tests most easily. Eventually, we
need to get rid of this flag by either adjusting the typechecker
errors or the test cases; t.b.d. on a case-by-case basis.
This CL also adjust a few error typechecker error messages already.
Change-Id: I9d4e491efadf87e999fc0d5b5151ec02a059f891
Reviewed-on: https://go-review.googlesource.com/c/go/+/274312
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type case in a type switch
Likewise for type assertions.
This is a port of https://golang.org/cl/273127 to dev.typeparams.
Updates #42758.
Change-Id: If93246371c3555e067b0043f0caefaac99101ebc
Reviewed-on: https://go-review.googlesource.com/c/go/+/273128
Trust: Robert Griesemer <gri@golang.org>
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
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binary ops
This is the go.types changes of https://golang.org/cl/271706
ported to types2.
Also: Fixed a bug in the go/types version (was using the
wrong position in the error message).
Change-Id: I798b80243a66f0be5b943a6951d7a1ff769abca2
Reviewed-on: https://go-review.googlesource.com/c/go/+/271806
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
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constant values
This is https://golang.org/cl/271377 ported to types2.
Updates #42695.
Change-Id: I475bdcaeace5b0e87d4476a6d660996534289666
Reviewed-on: https://go-review.googlesource.com/c/go/+/271520
Trust: Robert Griesemer <gri@golang.org>
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
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https://golang.org/cl/270957
This ports the latest updates to the dev.go2go version of types2
to the dev.typeparams version.
Change-Id: Ic1b09a8aaeefc701a5c194a587be26e0878e64da
Reviewed-on: https://go-review.googlesource.com/c/go/+/270958
Trust: Robert Griesemer <gri@golang.org>
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
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types2 and importer
This is a copy of the importer and types2 (unreviewed) prototype version
excluding the testdata directory containing tests (see below). Each file
is marked with the comment
// UNREVIEWED
on the first line. The plan is to check in this code wholesale (it runs and
passes all tests) and then review the code file-by-file via subsequent CLs
and remove the "// UNREVIEWED" comments as we review the files.
Since most tests are unchanged from the original go/types, the next CL will
commit those tests as they don't need to be reviewed again. (Eventually we
may want to factor them out and share them from a single place, e.g. the
test directory.)
The existing file fmtmap_test.go was updated.
Change-Id: I9bd0ad1a7e7188b501423483a44d18e623c0fe71
Reviewed-on: https://go-review.googlesource.com/c/go/+/263624
Trust: Robert Griesemer <gri@golang.org>
Trust: Keith Randall <khr@golang.org>
Run-TryBot: Robert Griesemer <gri@golang.org>
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
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