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| author | Rob Findley <rfindley@google.com> | 2021-02-11 10:23:41 -0500 |
|---|---|---|
| committer | Robert Findley <rfindley@google.com> | 2021-02-13 00:40:18 +0000 |
| commit | b81efb7ec4348951211058cf4fdfc045c75255d6 (patch) | |
| tree | 262b756be7647299688e37d153cefaa180eb570f /src/go/types/expr.go | |
| parent | a7e9b4b94804a1fbefc0c012ec510f4ee0837ffa (diff) | |
| download | go-b81efb7ec4348951211058cf4fdfc045c75255d6.tar.gz go-b81efb7ec4348951211058cf4fdfc045c75255d6.zip | |
[dev.regabi] go/types: add support for language version checking
This is a port of CL 289509 to go/types. It differs from that CL in
codes added to errors, to fit the new factoring of check_test.go, and to
allow go/types to import regexp in deps_test.go
For #31793
Change-Id: Ia9e4c7f5aac1493001189184227c2ebc79a76e77
Reviewed-on: https://go-review.googlesource.com/c/go/+/291317
Trust: Robert Findley <rfindley@google.com>
Run-TryBot: Robert Findley <rfindley@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
Diffstat (limited to 'src/go/types/expr.go')
| -rw-r--r-- | src/go/types/expr.go | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/go/types/expr.go b/src/go/types/expr.go index 7f8aaed411..aec3172327 100644 --- a/src/go/types/expr.go +++ b/src/go/types/expr.go @@ -772,6 +772,10 @@ func (check *Checker) shift(x, y *operand, e ast.Expr, op token.Token) { check.invalidOp(y, _InvalidShiftCount, "shift count %s must be integer", y) x.mode = invalid return + } else if !isUnsigned(y.typ) && !check.allowVersion(check.pkg, 1, 13) { + check.invalidOp(y, _InvalidShiftCount, "signed shift count %s requires go1.13 or later", y) + x.mode = invalid + return } var yval constant.Value @@ -1152,6 +1156,7 @@ func (check *Checker) exprInternal(x *operand, e ast.Expr, hint Type) exprKind { case *ast.BasicLit: switch e.Kind { case token.INT, token.FLOAT, token.IMAG: + check.langCompat(e) // The max. mantissa precision for untyped numeric values // is 512 bits, or 4048 bits for each of the two integer // parts of a fraction for floating-point numbers that are |