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go/doc: exclude lines ending in ':' from possible headings

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This is a more conservative approach to heading detection and
removes 11 headings from the current repository (several in
fmt). The current headscan output is:

/home/gri/go3/src/cmd/goinstall (package documentation)
        Remote Repositories
        The GOPATH Environment Variable
/home/gri/go3/src/pkg/exp/gotype (package documentation)
        Examples
/home/gri/go3/src/pkg/html/template (package template)
        Introduction
        Contexts
        Errors
        A fuller picture
        Contexts
        Typed Strings
        Security Model
/home/gri/go3/src/pkg/text/template (package template)
        Actions
        Arguments
        Pipelines
        Variables
        Examples
        Functions
        Associated templates
        Nested template definitions
18 headings found

R=golang-dev, adg, rsc
CC=golang-dev
https://golang.org/cl/5437105
This commit is contained in:
Robert Griesemer 2011-12-01 15:14:15 -08:00
parent 1e5aecf6ce
commit 6ea3a268b6
2 changed files with 7 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
src/pkg/go/doc/comment.go
View File

@ -241,8 +241,8 @@ func unindent(block []string) {
}
}
// heading returns the (possibly trimmed) line if it passes as a valid section
// heading; otherwise it returns the empty string.
// heading returns the trimmed line if it passes as a section heading;
// otherwise it returns the empty string.
func heading(line string) string {
line = strings.TrimSpace(line)
if len(line) == 0 {
@ -255,17 +255,12 @@ func heading(line string) string {
return ""
}
// it must end in a letter, digit or ':'
// it must end in a letter or digit:
r, _ = utf8.DecodeLastRuneInString(line)
if !unicode.IsLetter(r) && !unicode.IsDigit(r) && r != ':' {
if !unicode.IsLetter(r) && !unicode.IsDigit(r) {
return ""
}
// strip trailing ':', if any
if r == ':' {
line = line[0 : len(line)-1]
}
// exclude lines with illegal characters
if strings.IndexAny(line, ",.;:!?+*/=()[]{}_^°&§~%#@<\">\\") >= 0 {
return ""

5
src/pkg/go/doc/comment_test.go
View File

@ -18,7 +18,8 @@ var headingTests = []struct {
{"Foo 42", true},
{"", false},
{"section", false},
{"A typical usage:", true},
{"A typical usage:", false},
{"This code:", false},
{"δ is Greek", false},
{"Foo §", false},
{"Fermat's Last Sentence", true},
@ -26,7 +27,7 @@ var headingTests = []struct {
{"'sX", false},
{"Ted 'Too' Bar", false},
{"Use n+m", false},
{"Scanning:", true},
{"Scanning:", false},
{"N:M", false},
}