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spec: clarify that shift count must be non-negative 

Fixes #34056.

Change-Id: I2c9b7a20d19f458df5dcc376e29bee6be1f09f7a
Reviewed-on: https://go-review.googlesource.com/c/go/+/193277
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
This commit is contained in:
Robert Griesemer 2019-09-04 08:42:12 -07:00
parent 7b294cdd8d
commit 6fcc2d85be
1 changed files with 2 additions and 2 deletions
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4
doc/go_spec.html
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@ -1,6 +1,6 @@
<!--{ <!--{
"Title": "The Go Programming Language Specification", "Title": "The Go Programming Language Specification",
"Subtitle": "Version of Aug 26, 2019", "Subtitle": "Version of Sep 4, 2019",
"Path": "/ref/spec" "Path": "/ref/spec"
}--> }-->
@ -3732,7 +3732,7 @@ be replaced by a bitwise AND operation:
<p> <p>
The shift operators shift the left operand by the shift count specified by the The shift operators shift the left operand by the shift count specified by the
right operand, which must be positive. If the shift count is negative at run time, right operand, which must be non-negative. If the shift count is negative at run time,
a <a href="#Run_time_panics">run-time panic</a> occurs. a <a href="#Run_time_panics">run-time panic</a> occurs.
The shift operators implement arithmetic shifts if the left operand is a signed The shift operators implement arithmetic shifts if the left operand is a signed
integer and logical shifts if it is an unsigned integer. integer and logical shifts if it is an unsigned integer.