all: REVERSE MERGE dev.typeparams (7cdfa496) into master

This commit is a REVERSE MERGE.
It merges dev.typeparams back into its parent branch, master.
This marks the end of development on dev.typeparams.

Merge List:

+ 2021-02-19 7cdfa496 [dev.typeparams] all: merge master (06b86e98) into dev.typeparams
+ 2021-02-19 6521c7b3 [dev.typeparams] cmd/compile/internal/types2: resolve decl cycle the same way as in go/types
+ 2021-02-19 dfe0ef96 [dev.typeparams] go/types, types2: revert fancy struct printing (fixes x/tools tests)
+ 2021-02-19 2f37939a go/parser: improve error recovery from invalid selector exprs
+ 2021-02-19 8654db45 [dev.typeparams] go/types: adjust printing of embedded struct fields (fixes x/tools/cmd/guru tests)
+ 2021-02-19 47e4b073 Merge "[dev.typeparams] all: merge master (eb982727) into dev.typeparams" into dev.typeparams
+ 2021-02-18 a789be78 [dev.typeparams] cmd/compile: use new converter functions rather than methods (fix build)
+ 2021-02-18 20050a15 [dev.typeparams] cmd/compile:  support generic types (with stenciling of method calls)
+ 2021-02-18 e7493a9c [dev.typeparams] all: merge master (eb982727) into dev.typeparams
+ 2021-02-18 2ff1e05a [dev.typeparams] all: update parent repository
+ 2021-02-18 8960ce77 [dev.typeparams] cmd/compile/internal/types2: minor adjustments to match go/types more closely
+ 2021-02-18 6f3878b9 [dev.typeparams] cmd/compile/internal/types: review of typestring_test.go
+ 2021-02-18 d6bdd1ae [dev.typeparams] cmd/compile/internal/types: review of typestring.go
+ 2021-02-18 c2314bab [dev.typeparams] cmd/compile/internal/types: review of type.go
+ 2021-02-18 099374b5 [dev.typeparams] cmd/compile/internal/types2: remove Type.Under method in favor of function
+ 2021-02-18 653386a8 [dev.typeparams] cmd/compile/internal/types2: replace Named, TypeParam methods with functions
+ 2021-02-18 5e4da867 [dev.typeparams] cmd/compile/internal/types2: use converter functions rather than methods
+ 2021-02-18 5ecb9a78 [dev.typeparams] go/types: use a new ast.ListExpr for multi-type instances
+ 2021-02-18 7b679617 [dev.typeparams] go/types: conversions to type parameters are not constant
+ 2021-02-17 f5d0c653 [dev.typeparams] merge master (2f0da6d9) into dev.typeparams
+ 2021-02-17 e196cb82 [dev.typeparams] cmd/dist:  disable -G=3 on the std go tests for now
+ 2021-02-12 a06bd9fe [dev.typeparams] cmd/compile/internal/types: review of resolver_test.go
+ 2021-02-12 042f88fe [dev.typeparams] cmd/compile/internal/types: review of errors_test.go
+ 2021-02-12 0abd7b76 [dev.typeparams] cmd/compile/internal/types: review of universe.go
+ 2021-02-12 1b6f0bf1 [dev.typeparams] cmd/compile/internal/types: review of sizes_test.go
+ 2021-02-12 17587801 [dev.typeparams] cmd/compile/internal/types: review of sizes.go
+ 2021-02-12 3aee461d [dev.typeparams] cmd/compile/internal/types: review of return.go
+ 2021-02-12 7428318a [dev.typeparams] cmd/compile/internal/types: review of object_test.go
+ 2021-02-12 b20f9e2d [dev.typeparams] cmd/compile/internal/types: review of object.go
+ 2021-02-12 20746b2f [dev.typeparams] cmd/compile/internal/types: review of labels.go
+ 2021-02-12 bab34611 [dev.typeparams] cmd/compile/internal/types: review of infer.go
+ 2021-02-12 91685909 [dev.typeparams] cmd/compile/internal/types: review of builtin_test.go
+ 2021-02-12 f1777cf8 [dev.typeparams] cmd/compile/internal/types: review of builtin.go
+ 2021-02-12 0f43973b [dev.typeparams] go/types: make predeclared "any" alias for interface{}
+ 2021-02-12 58758e0a [dev.typeparams] go/types: better error message for invalid ... use
+ 2021-02-11 c0aa7bd7 [dev.typeparams] cmd/compile: small fixes for stenciling
+ 2021-02-10 df23540d [dev.typeparams] cmd/gofmt: add the -G flag to allow generic code
+ 2021-02-10 ddec18cf [dev.typeparams] cmd/compile/internal/types2: overlapping embedded interfaces requires go1.14
+ 2021-02-10 fdf3496f [dev.typeparams] cmd/compile:  make type conversions by type parameters work
+ 2021-02-10 12e15d43 [dev.typeparams] cmd/compile: handle calling a method on a type param in stenciling
+ 2021-02-08 ca18c420 [dev.typeparams] merge dev.regabi (618e3c15) into dev.typeparams
+ 2021-02-08 a360eeb5 [dev.typeparams] cmd/compile/internal/types2: conversions to type parameters are not constant
+ 2021-02-08 0fbde54e [dev.typeparams] cmd/compile: allow generic funcs to call other generic funcs for stenciling
+ 2021-02-05 dcb5e039 [dev.typeparams] cmd/compile: add stenciling of simple generic functions
+ 2021-02-04 f37b0c6c [dev.typeparams] cmd/compile/internal/types2: type alias decl requires go1.9
+ 2021-02-04 72148849 [dev.typeparams] cmd/compile: pass -lang flag value to new type checker
+ 2021-02-04 1ff2fdaa [dev.typeparams] cmd/compile/internal/types2: add support for language version checking
+ 2021-02-04 370e9f58 [dev.typeparams] cmd/compile/internal/types2: use 512 bits as max. integer precision
+ 2021-02-04 ca2f1528 [dev.typeparams] go/types: add missing test from dev.go2go
+ 2021-02-03 dc122c7a [dev.typeparams] test: exclude a failing test again (fix 32bit builds)
+ 2021-02-03 c910fd7b [dev.typeparams] cmd/compile: refuse excessively long constants
+ 2021-02-03 3db6e184 [dev.typeparams] test: enable more errorcheck tests
+ 2021-02-03 bb53a5ad [dev.typeparams] cmd/compile/internal/importer: adjust importer to match compiler importer
+ 2021-02-03 3f845b3b [dev.typeparams] cmd/compile: deal with inferred type arguments
+ 2021-02-03 e633f343 [dev.typeparams] cmd/compile:  add OFUNCINST/OTYPEINST nodes for generic func/type instantiation
+ 2021-02-02 0d2d6c74 [dev.typeparams] all: merge dev.regabi (23b0c1f7) into dev.typeparams
+ 2021-02-02 3d5c715b [dev.typeparams] Handling multiple type arguments for call via new node OLIST
+ 2021-02-01 13a74129 [dev.typeparams] Parse a generic type arg for generic function call
+ 2021-01-30 0aafd691 [dev.typeparams] cmd/compile: start translating type params in noder2
+ 2021-01-30 a59cb510 [dev.typeparams] cmd/compile/internal/types2: handle untyped constant arithmetic overflow
+ 2021-01-29 507e6419 [dev.typeparams] cmd/compile/internal/typecheck: declutter generated builtin.go (cleanup)
+ 2021-01-28 2440dd45 [dev.typeparams] cmd/compile:  start adding info needed for typeparams in types & ir
+ 2021-01-28 c0bf904d [dev.typeparams] cmd/compile/internal/types2: translate syntax to token constants via tables
+ 2021-01-28 f7d1c599 [dev.typeparams] cmd/compile/internal/types2: must not import a package called "init"
+ 2021-01-27 217a461f [dev.typeparams] cmd/compile/internal/types2: report unused packages in source order
+ 2021-01-26 08a598f8 [dev.typeparams] cmd/compile: fix MethodExpr handling with embedded fields
+ 2021-01-26 cecc1dfc [dev.typeparams] test: enable excluded test fixedbugs/issue7742.go
+ 2021-01-26 e48d7d3b [dev.typeparams] go/constant: faster match implementation
+ 2021-01-26 d39685e5 [dev.typeparams] go/constant: choose internal float representations more consistently
+ 2021-01-25 34704e37 [dev.typeparams] all: merge dev.regabi (5e4a0cdd) into dev.typeparams
+ 2021-01-26 c97af003 [dev.typeparams] cmd/compile: force untyped constants from types2 to expected kind
+ 2021-01-25 3663a437 [dev.typeparams] go/constant: in ToFloat, convert to rational numbers, not floats
+ 2021-01-25 3432d24b Merge "[dev.typeparams] all: merge dev.regabi (063c72f0) into dev.typeparams" into dev.typeparams
+ 2021-01-25 493eb6e6 [dev.typeparams] cmd/compile: fix -G=3 handling of blank methods
+ 2021-01-25 13f02018 [dev.typeparams] test: enable more errorcheck tests w/ -G=3
+ 2021-01-24 6d8d1187 [dev.typeparams] all: merge dev.regabi (063c72f0) into dev.typeparams
+ 2021-01-24 9456804e [dev.typeparams] test: fix excluded files lookup so it works on Windows
+ 2021-01-23 7947df43 [dev.typeparams] test: set -G=3 and enable more errorcheck tests in run.go
+ 2021-01-23 a49e9410 [dev.typeparams] cmd/compile/internal/types2: remove MethodSet code - not used by types2
+ 2021-01-23 5347241b [dev.typeparams] cmd/compile/internal/types2: use same sort criteria for methods as compiler
+ 2021-01-23 2b95c28b [dev.typeparams] cmd/compile: refactor SelectorExpr code into helpers
+ 2021-01-23 1946a77e Merge "[dev.typeparams] all: merge dev.regabi (7e0a81d2) into dev.typeparams" into dev.typeparams
+ 2021-01-23 6923019a [dev.typeparams] cmd/compile/internal/types2: factor out sorting of methods
+ 2021-01-22 6e46c8fb [dev.typeparams] all: merge dev.regabi (7e0a81d2) into dev.typeparams
+ 2021-01-22 e4ef30a6 [dev.typeparams] cmd/compile: refactor irgen's handling of ":="
+ 2021-01-22 626406b7 [dev.typeparams] go/types: import api_test.go changes from dev.go2go
+ 2021-01-22 12cd9cf7 [dev.typeparams] cmd/compile: disambiguate OXDOT in noder using types2 Selection info
+ 2021-01-22 f8654579 [dev.typeparams] cmd/compile/internal/types2: adjust errors in branch checking code, fix a bug
+ 2021-01-21 18bd7aa6 [dev.typeparams] cmd/compile: use nil instead of syntax.ImplicitOne
+ 2021-01-21 2427f6e6 [dev.typeparams] cmd/compile: directly set some simple expression types
+ 2021-01-21 455c29af [dev.typeparams] cmd/compile/internal/types2: convert untyped arguments to delete
+ 2021-01-21 f03f934e [dev.typeparams] cmd/compile/internal/types2: make predeclared "any" alias for interface{}
+ 2021-01-20 0f054c5b [dev.typeparams] cmd/dist: add -G=3 test coverage
+ 2021-01-20 89ec17be [dev.typeparams] cmd/compile: simplify how irgen handles qualified idents
+ 2021-01-20 fa01ade4 [dev.typeparams] go/types: add tests from dev.go2go
+ 2021-01-20 734cb8be [dev.typeparams] go/types: refactor untyped conversion for typeparams
+ 2021-01-20 d8796b56 [dev.typeparams] cmd/compile/internal/types2: report type of nil based on context
+ 2021-01-19 48a3cb39 [dev.typeparams] go/types: fix some merge errors in call.go
+ 2021-01-19 3e15bf77 [dev.typeparams] go/types: don't modify Named.underlying in validType
+ 2021-01-19 f38f8624 [dev.typeparams] go/types: strip annotations from errors
+ 2021-01-19 2e64511a [dev.typeparams] go/types: unify methods in missingMethod
+ 2021-01-19 958927c8 [dev.typeparams] go/parser: error for type instances without ParseTypeParams
+ 2021-01-19 90bfc730 [dev.typeparams] cmd/compile: cache mapped types during irgen
+ 2021-01-19 3c0a39c9 [dev.typeparams] cmd/compile/internal/types: minor fixes/cleanups around testing
+ 2021-01-15 502198c8 [dev.typeparams] cmd/compile/internal/types2: consistently report nil type as "untyped nil"
+ 2021-01-14 82c3f0a3 [dev.typeparams] cmd/compile/internal/types2: untyped shift counts must fit into uint
+ 2021-01-14 67bf62d9 [dev.typeparams] cmd/compile/internal/types2: better error message for invalid ... use
+ 2021-01-14 ef5285fb [dev.typeparams] cmd/compile: add types2-based noder
+ 2021-01-12 f065ff22 [dev.typeparams] all: merge dev.regabi (d9acf6f3) into dev.typeparams
+ 2021-01-12 09959966 [dev.typeparams] cmd/compile: refactor import logic
+ 2021-01-12 106aa941 [dev.typeparams] cmd/compile: refactor DWARF scope marking
+ 2021-01-12 6a56c6c8 [dev.typeparams] go/types: import dev.go2go changes to check tests
+ 2021-01-11 9e746e42 [dev.typeparams] cmd/compile: refactor varEmbed logic
+ 2021-01-11 3e1a87ac [dev.typeparams] cmd/compile: extract posMap from noder
+ 2021-01-11 2e8f29b7 [dev.typeparams] cmd/compile: add types2.Sizes implementation
+ 2021-01-11 44d1a852 [dev.typeparams] cmd/compile/internal/types2: fixes for all.bash
+ 2021-01-11 8123bc90 [dev.typeparams] cmd/go: relax test expectation
+ 2021-01-11 8c5aa42c [dev.typeparams] cmd/compile: calculate variable sizes in walk
+ 2021-01-11 1ce08541 [dev.typeparams] import stmt changes from dev.go2go
+ 2021-01-11 eb53a6c7 [dev.typeparams] import operand.go changes from dev.go2go
+ 2021-01-11 81cd9985 [dev.typeparams] go/types: import expr changes from dev.go2go
+ 2021-01-08 822aeacd [dev.typeparams] cmd/compile/internal/syntax: remove ShortString, use String instead
+ 2021-01-08 d017a1b6 [dev.typeparams] cmd/compile/internal/syntax: add Walk node vistor from types2
+ 2021-01-08 7903214f [dev.typeparams] cmd/compile/internal/syntax: add ShortString tests
+ 2021-01-08 0aede120 [dev.typeparams] cmd/compile/internal/types2: use syntax printer to print expressions
+ 2021-01-08 934f9dc0 [dev.typeparams] cmd/compile/internal/syntax: clean up node printing API
+ 2021-01-07 5b9152de [dev.typeparams] all: merge dev.regabi (cb05a0aa) into dev.typeparams
+ 2021-01-07 7e689f86 [dev.typeparams] go/types: move use and useLHS to match dev.go2go
+ 2021-01-06 d76cefed [dev.typeparams] go/types: remove disabled code related to type lists
+ 2021-01-06 0e286579 [dev.typeparams] go/types: import typexpr.go from dev.go2go
+ 2021-01-06 9546596d [dev.typeparams] cmd/compile/internal/types2: remove disabled code related to type lists
+ 2021-01-06 196102d0 [dev.typeparams] cmd/compile/internal/types2: review of typexpr.go
+ 2021-01-05 a8fe098a [dev.typeparams] all: merge dev.regabi (77365c5e) into dev.typeparams
+ 2020-12-28 a800acaa [dev.typeparams] all: merge dev.regabi (07569dac) into dev.typeparams
+ 2020-12-27 dd40bbc5 [dev.typeparams] cmd/compile: re-enable internal/types2 test
+ 2020-12-23 d99dd178 [dev.typeparams] all: merge dev.regabi (37f138df) into dev.typeparams
+ 2020-12-22 8b1fbd82 [dev.typeparams] all: merge dev.regabi (6d03cde8) into dev.typeparams
+ 2020-12-22 23922cf8 [dev.typeparams] all: merge dev.regabi (d1d1099c) into dev.typeparams
+ 2020-12-23 788dad53 [dev.typeparams] cmd/compile/internal/types2: disable external test temporarily
+ 2020-12-22 91cc51e0 [dev.typeparams] all: merge dev.regabi (ec741b04) into dev.typeparams
+ 2020-12-22 e02a007f [dev.typeparams] codereview.cfg: add config for dev.typeparams
+ 2020-12-22 41e7901c [dev.typeparams] cmd/compile/internal/types2: report error for invalid main function signature
+ 2020-12-22 53c4c17b [dev.typeparams] all: merge dev.regabi into dev.typeparams
+ 2020-12-17 060cdbc7 [dev.typeparams] go/types: import object resolution from dev.go2go
+ 2020-12-17 c4f0da57 [dev.typeparams] cmd/compile/internal/types2: remove code for implicit type arguments
+ 2020-12-16 068dd047 [dev.typeparams] cmd/compile/internal/syntax: don't panic when providing -verify
+ 2020-12-16 7909d6ec [dev.typeparams] cmd/compile/internal/syntax: type parameters must always be named
+ 2020-12-16 3b5918c7 [dev.typeparams] cmd/compile/internal/types2: review of predicates.go
+ 2020-12-16 09abd23d [dev.typeparams] go/types: import predicates.go from dev.go2go
+ 2020-12-16 f38da2cb [dev.typeparams] cmd/compile/internal/types2: review of unify.go
+ 2020-12-16 ceb77db2 [dev.typeparams] go/types: import some support functions from dev.go2go
+ 2020-12-15 a4d4c103 [dev.typeparams] go/types: import lookup logic from dev.go2go
+ 2020-12-15 13064351 [dev.typeparams] go/types: import changes to types.Info from dev.go2go
+ 2020-12-15 6b18081d [dev.typeparams] cmd/compile/internal/types2: don't crash if import path is missing
+ 2020-12-15 14e4267c [dev.typeparams] cmd/compile/internal/types2: report error for invalid (but empty) expr switch
+ 2020-12-15 96999296 [dev.typeparams] go/types: import unify.go and infer.go from dev.go2go
+ 2020-12-15 5aff757e [dev.typeparams] cmd/compile/internal/gc: provide types2 selection info to noder
+ 2020-12-14 c8e73489 go/types: import instance.expand and subst.go from dev.go2go
+ 2020-12-14 3a912f27 [dev.typeparams] cmd/compile/internal/syntax: export NewName and use it
+ 2020-12-14 8ec9e890 [dev.typeparams] cmd/compile/internal/types2: fix stray ')' in error
+ 2020-12-14 8fe8e29c [dev.typeparams] cmd/compile/internal/types2: report error for invalid type expression
+ 2020-12-14 f8930a24 [dev.typeparams] cmd/compile/internal/types2: report invalid ... in conversions
+ 2020-12-14 5aca6e78 [dev.typeparams] test: finish triaging all outstanding failing tests
+ 2020-12-14 df58f336 [dev.typeparams] cmd/compile/internal/types2: don't report two errors for bad strings
+ 2020-12-14 91803a2d [dev.typeparams] merge: merge branch 'dev.regabi' into 'dev.typeparams'
+ 2020-12-11 a2002122 [dev.typeparams] cmd/compile/internal/types2: bring over subst.go changes from go/types
+ 2020-12-10 ddf44904 [dev.typeparams] test: exclude 32bit-specific test that fails on 32bit platforms (fix build)
+ 2020-12-10 dbce27d2 [dev.typeparams] cmd/compile/internal/types2: report correct line number for missing key
+ 2020-12-09 edf80c42 [dev.typeparams] cmd/compile/internal/types2: adjusted more error messages for compiler
+ 2020-12-09 43c7b214 [dev.typeparams] cmd/compile/internal/types2: adjusted qualified identifier error message for compiler
+ 2020-12-09 6812eae2 [dev.typeparams] cmd/compile/internal/types2: adjust init cycle error message for compiler
+ 2020-12-09 810957b1 [dev.typeparams] cmd/compile/internal/types2: adjusted array error message for compiler
+ 2020-12-09 c32566c3 [dev.typeparams] cmd/compile/internal/types2: avoid endless recursion in Comparable predicate
+ 2020-12-08 6015c4e5 [dev.typeparams] go/*: add TODOs from CLs importing dev.go2go changes
+ 2020-12-08 b6e67857 [dev.typeparams] go/types: import universe changes from dev.go2go
+ 2020-12-08 14dc2d23 [dev.typeparams] go/types: import the Type API from dev.go2go
+ 2020-12-07 cd15a480 [dev.typeparams] cmd/compile/internal/types2: correct error position for inherited const init expression
+ 2020-12-04 02820d61 [dev.typeparams] test: enable some more errorcheck tests
+ 2020-12-03 9ff27e9f [dev.typeparams] test: run all errorcheck tests that pass compiler with -G flag
+ 2020-12-03 7a1aa7df [dev.typeparams] test: adjust more test cases to match compiler -G output
+ 2020-12-03 07d32c81 [dev.typeparams] cmd/compile/internal/types: adjust some error messages to match the compiler
+ 2020-12-03 6b4da14d [dev.typeparams] cmd/compile: provide scaffolding to get types2 types during noding
+ 2020-12-02 72cc2353 [dev.typeparams] go/printer: adapt changes from dev.go2go
+ 2020-12-02 ab181255 [dev.typeparams] cmd/compile/internal/types2: no "declared but not used" errors for invalid var decls
+ 2020-12-02 03624586 [dev.typeparams] cmd/compile/internal/types2: set compiler error message for undeclared variable
+ 2020-12-01 bdc4ffe9 [dev.typeparams] cmd/compile/internal/types2: add Config.IgnoreBranches flag
+ 2020-12-01 72ad2f44 [dev.typeparams] test: add scaffolding to run.go to check compiler with -G flag
+ 2020-12-01 87bc85a8 [dev.typeparams] cmd/compile/internal/types2: adjustments toward matching compiler error messages
+ 2020-12-01 fbc4c6a3 [dev.typeparams] cmd/compile/internal/types2: remove support for type parameter pointer designation
+ 2020-11-25 ba9c35aa [dev.typeparams] merge dev.regabi 40f5bc4d into dev.typeparams
+ 2020-11-25 5c2e1487 [dev.typeparams] merge dev.regabi 41f3af9d into dev.typeparams
+ 2020-11-25 2c25cd5b [dev.typeparams] cmd/compile/internal/types2: a type parameter is a valid type case in a type switch
+ 2020-11-24 0fb733b7 [dev.typeparams] go/parser: support the ParseTypeParams mode
+ 2020-11-24 b5676212 [dev.typeparams] import go2go changes to parse type parameters
+ 2020-11-24 a324aebb [dev.typeparams] go/types, cmd/compile/internal/types2: fix incorrect string(int) conversion (regression)
+ 2020-11-20 8fbdacf6 [dev.typeparams] cmd/compile/internal/types2: report constant overflow in binary ops
+ 2020-11-19 b1ae0a06 [dev.typeparams] Merge branch 'master' into dev.typeparams
+ 2020-11-19 0123c9b3 [dev.typeparams] cmd/compile/internal/types2: report an error for invalid constant values
+ 2020-11-18 21400491 [dev.typeparams] cmd/compile/internal/types2: port of https://golang.org/cl/270957
+ 2020-11-11 6877ee1e [dev.typeparams] cmd/compile: use existing findpkg algorithm when importing through types2
+ 2020-11-03 165ceb09 [dev.typeparams] merge master into dev.typeparams
+ 2020-10-28 41ff51ae [dev.typeparams] cmd/compile/internal/types2: review of scopes.go
+ 2020-10-27 9392b829 [dev.typeparams] cmd/compile/internal/types: review of objset.go
+ 2020-10-27 c32ac6c1 [dev.typeparams] cmd/compile/internal/types: review of selection.go
+ 2020-10-27 ff6ab114 [dev.typeparams] cmd/compile/internal/types: review of gccgosizes.go
+ 2020-10-27 abb31c25 [dev.typeparams] cmd/compile/internal/types2: review of hilbert_test.go
+ 2020-10-27 6e98406a [dev.typeparams] cmd/compile/internal/types2: review of initorder.go
+ 2020-10-27 38af45b4 [dev.typeparams] cmd/compile/internal/types2: review of package.go
+ 2020-10-27 87eab746 [dev.typeparams] cmd/compile: enable type-checking of generic code
+ 2020-10-23 5bfd2964 [dev.typeparams] merge master into dev.typeparams
+ 2020-10-22 a10fe9f6 go/ast: import AST changes supporting typeparams from dev.go2go
+ 2020-10-21 7a8a720c [dev.typeparams] cmd/compile/internal/types2: add *.go2 (generic) tests
+ 2020-10-21 755d6de1 [dev.typeparams] cmd/compile/internal/types2: add some more tests
+ 2020-10-21 1d07306a [dev.typeparams] cmd/compile/internal/types2: adjust tests, enable Testdata tests
+ 2020-10-21 befc62a2 [dev.typeparams] cmd/compile/internal/types2: add testdata directory
+ 2020-10-21 ca36ba83 [dev.typeparams] cmd/compile/internal/importer, types2: initial check-in of types2 and importer
+ 2020-10-20 6ff16fe3 [dev.typeparams] cmd/compile/internal/syntax: add utility functions for testing
+ 2020-10-19 5e46c6a1 [dev.typeparams] cmd/compile/internal/syntax: add Pos method
+ 2020-10-15 e9e58a4d [dev.typeparams] cmd/compile/internal/syntax: fix printing of channel types
+ 2020-10-14 73f52984 [dev.typeparams] cmd/compile/internal/syntax: always use IndexExpr node for type instantiation
+ 2020-10-13 48755e06 [dev.typeparams] cmd/compile: enable parsing of generic code with new -G flag
+ 2020-10-13 7668f02d [dev.typeparams] cmd/compile/internal/syntax: add type parameter tests
+ 2020-10-13 b627988b [dev.typeparams] cmd/compile/internal/syntax: implement parsing of type parameters
+ 2020-10-13 617b6339 [dev.typeparams] cmd/compile/internal/syntax: prepare syntax nodes for type parameters
+ 2020-10-12 986cad14 [dev.typeparams] merge master into dev.typeparams

Change-Id: Ie0796a53af1fb5db49f4c748144461d3af598575