55ecda4ffd
The spec defines precise numeric constants which do not overflow. Consequently, +/-Inf and NaN values were excluded. The case was not clear for -0.0 but they are mostly of interest to determine the sign of infinities which don't exist. That said, the conversion rules explicitly say that T(x) (for a numeric x and floating-point type T) is the value after rounding per IEEE-754. The result is constant if x is constant. Rounding per IEEE-754 can produce a -0.0 which we cannot represent as a constant. Thus, the spec is inconsistent. Attempt to fix the inconsistency by adjusting the rounding rule rather than letting -0.0 into the language. For more details, see the issue below. Open to discussion. Fixes #12576. Change-Id: Ibe3c676372ab16d9229f1f9daaf316f761e074ee Reviewed-on: https://go-review.googlesource.com/14727 Reviewed-by: Rob Pike <r@golang.org> Reviewed-by: Ian Lance Taylor <iant@golang.org> Reviewed-by: Russ Cox <rsc@golang.org> |
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The Go Programming Language
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Binary Distribution Notes
If you have just untarred a binary Go distribution, you need to set the environment variable $GOROOT to the full path of the go directory (the one containing this file). You can omit the variable if you unpack it into /usr/local/go, or if you rebuild from sources by running all.bash (see doc/install-source.html). You should also add the Go binary directory $GOROOT/bin to your shell's path.
For example, if you extracted the tar file into $HOME/go, you might put the following in your .profile:
export GOROOT=$HOME/go
export PATH=$PATH:$GOROOT/bin
See https://golang.org/doc/install or doc/install.html for more details.