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go/parser: minor internal cleanups

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R=golang-dev, r
CC=golang-dev
https://golang.org/cl/6356046
This commit is contained in:
Robert Griesemer 2012-06-28 12:22:47 -07:00
parent 71de83b733
commit 72a2abf8ad
1 changed files with 7 additions and 6 deletions
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13
src/pkg/go/parser/parser.go
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@ -28,7 +28,7 @@ type parser struct {
// Tracing/debugging
mode Mode // parsing mode
trace bool // == (mode & Trace != 0)
indent uint // indentation used for tracing output
indent int // indentation used for tracing output
// Comments
comments []*ast.CommentGroup
@ -191,15 +191,16 @@ func (p *parser) resolve(x ast.Expr) {
// Parsing support
func (p *parser) printTrace(a ...interface{}) {
const dots = ". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . " +
". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "
const n = uint(len(dots))
const dots = ". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "
const n = len(dots)
pos := p.file.Position(p.pos)
fmt.Printf("%5d:%3d: ", pos.Line, pos.Column)
i := 2 * p.indent
for ; i > n; i -= n {
for i > n {
fmt.Print(dots)
i -= n
}
// i <= n
fmt.Print(dots[0:i])
fmt.Println(a...)
}
@ -210,7 +211,7 @@ func trace(p *parser, msg string) *parser {
return p
}
// Usage pattern: defer un(trace(p, "..."));
// Usage pattern: defer un(trace(p, "..."))
func un(p *parser) {
p.indent--
p.printTrace(")")