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preserve blank lines in // comments

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R=gri
DELTA=32  (13 added, 12 deleted, 7 changed)
OCL=35317
CL=35332
This commit is contained in:
Russ Cox 2009-10-05 11:24:01 -07:00
parent c5b056f24f
commit 7d85cebb1c
1 changed files with 19 additions and 18 deletions
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37
src/pkg/go/doc/comment.go
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@ -76,24 +76,12 @@ func CommentText(comment *ast.CommentGroup) string {
l = l[m[1] : len(l)];
}
// throw away leading blank lines
if w == 0 && l == "" {
continue;
}
cl[w] = l;
w++;
}
cl = cl[0:w];
// throw away trailing blank lines
for w > 0 && cl[w-1] == "" {
w--;
}
cl = cl[0 : w];
// add this comment to total list
// TODO: maybe separate with a single blank line
// if there is already a comment and len(cl) > 0?
// Add this comment to total list.
for _, l := range cl {
n := len(lines);
if n+1 >= cap(lines) {
@ -108,10 +96,23 @@ func CommentText(comment *ast.CommentGroup) string {
}
}
// add final "" entry to get trailing newline.
// loop always leaves room for one more.
n := len(lines);
lines = lines[0 : n+1];
// Remove leading blank lines; convert runs of
// interior blank lines to a single blank line.
n := 0;
for _, line := range lines {
if line != "" || n > 0 && lines[n-1] != "" {
lines[n] = line;
n++;
}
}
lines = lines[0 : n];
// Add final "" entry to get trailing newline from Join.
// The original loop always leaves room for one more.
if n > 0 && lines[n-1] != "" {
lines = lines[0 : n+1];
lines[n] = "";
}
return strings.Join(lines, "\n");
}