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go/test/typeparam
Dan Scales 70d54df4f6 cmd/compile: getting more built-ins to work with generics
For Builtin ops, we currently stay with using the old
typechecker to transform the call to a more specific expression
and possibly use more specific ops. However, for a bunch of the
ops, we delay calling the old typechecker if any of the args have
type params, for a variety of reasons.

In the near future, we will start creating separate functions that do
the same transformations as the old typechecker for calls, builtins,
indexing, comparisons, etc. These functions can then be called at noder
time for nodes with no type params, and at stenciling time for nodes
with type params.

Remove unnecessary calls to types1 typechecker for most kinds of
statements (still need it for SendStmt, AssignStmt, ReturnStmt, and
SelectStmt). In particular, we don't need it for RangeStmt, and this
avoids some complaints by the types1 typechecker on generic code.

Other small changes:
 - Fix check on whether to delay calling types1-typechecker on type
   conversions. Should check if HasTParam is true, rather than if the
   type is directly a TYPEPARAM.

 - Don't call types1-typechecker on an indexing operation if the left
   operand has a typeparam in its type and is not obviously a TMAP,
   TSLICE, or TARRAY. As above, we will eventually have to create a new
   function that can do the required transformations (for complicated
   cases) at noder time or stenciling time.

 - Copy n.BuiltinOp in subster.node()

 - The complex arithmetic example in absdiff.go now works.

 - Added new tests double.go and append.go

 - Added new example with a new() call in settable.go

Change-Id: I8f377afb6126cab1826bd3c2732aa8cdf1f7e0b4
Reviewed-on: https://go-review.googlesource.com/c/go/+/301951
Run-TryBot: Dan Scales <danscales@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Dan Scales <danscales@google.com>
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
2021-03-17 16:53:00 +00:00
..
absdiff.go cmd/compile: getting more built-ins to work with generics 2021-03-17 16:53:00 +00:00
append.go cmd/compile: getting more built-ins to work with generics 2021-03-17 16:53:00 +00:00
chans.go cmd/compile: add support for generic channels and type conversion during calls 2021-03-15 20:28:10 +00:00
combine.go
cons.go cmd/compile: add support for generic channels and type conversion during calls 2021-03-15 20:28:10 +00:00
double.go cmd/compile: getting more built-ins to work with generics 2021-03-17 16:53:00 +00:00
fact.go
graph.go cmd/compile: deal with comparable embedded in a constraint 2021-03-16 18:42:06 +00:00
importtest.go
index.go
list.go
lockable.go cmd/compile: fix noder.Addr() to not call typechecker 2021-03-12 02:30:33 +00:00
map.go
maps.go cmd/compile: add support for generic maps 2021-03-15 20:28:34 +00:00
metrics.go cmd/compile: fix case where func-valued field of a generic type is called 2021-03-15 20:29:11 +00:00
min.go
ordered.go cmd/compile: get instantiated generic types working with interfaces 2021-03-09 16:37:52 +00:00
orderedmap.go cmd/compile: fix case where func-valued field of a generic type is called 2021-03-15 20:29:11 +00:00
pair.go
sets.go cmd/compile: add support for generic maps 2021-03-15 20:28:34 +00:00
settable.go cmd/compile: getting more built-ins to work with generics 2021-03-17 16:53:00 +00:00
slices.go cmd/compile: fix case where func-valued field of a generic type is called 2021-03-15 20:29:11 +00:00
smallest.go
smoketest.go
stringable.go
stringer.go
struct.go
sum.go
tparam1.go
value.go