func (p *noder) pragma(pos, line int, text string) syntax.Pragma {
switch {
case strings.HasPrefix(text, "line "):
// Want to use LastIndexByte below but it's not defined in Go1.4 and bootstrap fails.
i := strings.LastIndex(text, ":") // look from right (Windows filenames may contain ':')
if i < 0 {
break
}
n, err := strconv.Atoi(text[i+1:])
if err != nil {
// TODO: make this an error instead? it is almost certainly a bug.
break
}
if n > 1e8 {
p.error(syntax.Error{Pos: pos, Line: line, Msg: "line number out of range"})
errorexit()
}
if n <= 0 {
break
}
lexlineno = p.baseline + int32(line)
linehistupdate(text[5:i], n)
case strings.HasPrefix(text, "go:linkname "):
// Record line number so we can emit an error later if
// the file doesn't import package unsafe.
p.linknames = append(p.linknames, line)
f := strings.Fields(text)
if len(f) != 3 {
p.error(syntax.Error{Pos: pos, Line: line, Msg: "usage: //go:linkname localname linkname"})
break
}
lookup(f[1]).Linkname = f[2]
case strings.HasPrefix(text, "go:cgo_"):
pragcgobuf += pragcgo(text)
fallthrough // because of //go:cgo_unsafe_args
default:
verb := text
if i := strings.Index(text, " "); i >= 0 {
verb = verb[:i]
}
return syntax.Pragma(pragmaValue(verb))
}
return 0
}
func (p *noder) pragma(pos, line int, text string) syntax.Pragma {
switch {
case strings.HasPrefix(text, "line "):
i := strings.IndexByte(text, ':')
if i < 0 {
break
}
n, err := strconv.Atoi(text[i+1:])
if err != nil {
// todo: make this an error instead? it is almost certainly a bug.
break
}
if n > 1e8 {
p.error(pos, line, "line number out of range")
errorexit()
}
if n <= 0 {
break
}
lexlineno = p.baseline + int32(line)
linehistupdate(text[5:i], n)
case strings.HasPrefix(text, "go:linkname "):
// Record line number so we can emit an error later if
// the file doesn't import package unsafe.
p.linknames = append(p.linknames, line)
f := strings.Fields(text)
if len(f) != 3 {
p.error(pos, line, "usage: //go:linkname localname linkname")
break
}
lookup(f[1]).Linkname = f[2]
case strings.HasPrefix(text, "go:cgo_"):
pragcgobuf += pragcgo(text)
fallthrough // because of //go:cgo_unsafe_args
default:
verb := text
if i := strings.Index(text, " "); i >= 0 {
verb = verb[:i]
}
return syntax.Pragma(pragmaValue(verb))
}
return 0
}