Thanks a lot, Ian, it works now.
On Thursday, June 11, 2020 at 2:17:23 PM UTC+8, Ian Lance Taylor wrote:
>
> On Wed, Jun 10, 2020 at 11:05 PM xiang...@gmail.com <javascript:>
> <xiang...@gmail.com <javascript:>> wrote:
> >
> > Wondering if the 'expression' part of an if-statement should be in one
> line only, given the following case, 'go tool compile' will report a syntax
> error
> >
> > Enter code here...
> > package p
> >
> > func cf1() int {
> > return 0
> > }
> >
> > func cf2() int {
> > return 10
> > }
> >
> > func f() {
> > if cf2() - 1
> > < cf1() {
> > println("tested")
> > }
> > }
> >
> >
> > ss.go:13:3: syntax error: unexpected <, expecting expression
> >
> > Guess there might be syntax specification rules but I failed to find
> out.
>
> It's because of automatic semicolon insertion. You need to put the
> "<" at the end of the "if" line, not at the start of the next line.
> See https://golang.org/ref/spec#Semicolons .
>
> Ian
>
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