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Explain why

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-flag true
does not work although
	-flag=true
does.

Fixes #139.

R=iant
CC=golang-dev
https://golang.org/cl/154118
This commit is contained in:
Rob Pike 2009-11-13 13:15:18 -08:00
parent 662ee8704c
commit f9919ba323
1 changed files with 6 additions and 1 deletions
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7
src/pkg/flag/flag.go
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@ -31,8 +31,13 @@
Command line flag syntax: Command line flag syntax:
-flag -flag
-flag=x -flag=x
-flag x -flag x // non-boolean flags only
One or two minus signs may be used; they are equivalent. One or two minus signs may be used; they are equivalent.
The last form is not permitted for boolean flags because the
meaning of the command
cmd -x *
will change if there is a file called 0, false, etc. You must
use the -flag=false form to turn off a boolean flag.
Flag parsing stops just before the first non-flag argument Flag parsing stops just before the first non-flag argument
("-" is a non-flag argument) or after the terminator "--". ("-" is a non-flag argument) or after the terminator "--".