sed - please help me

From	Szyk <szyk100@o2.pl>
Newsgroups	alt.comp.linux, comp.os.linux.misc
Subject	sed - please help me
Date	2012-02-03 21:56 +0100
Organization	Netia S.A.
Message-ID	<jghhms$duc$1@mx1.internetia.pl> (permalink)

Cross-posted to 2 groups.

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Hi

I want extract class names from C++ file sources. So I think sed will 
perfeclty fit my needs. I wrote two almos identical sed commands, but 
second completly does not work. Please tell me why?

First command:
$ sed -n '/^class[[:space:]]\+[[:alpha:]]\+.*$/p' ./User.h
class RoomState
class UserBase
class UserData : public UserBase
class User : public UserBase

And similiar but with simple transformation:
$ sed -n 's/^class[[:space:]]\+\([[:alpha:]]\+\).*$/\1\n/' ./User.h
[no output]


thank you
Szyk

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sed - please help me Szyk <szyk100@o2.pl> - 2012-02-03 21:56 +0100
  Re: sed - please help me Baho Utot <baho-utot@invlaid.com> - 2012-02-03 17:59 -0500
  Re: sed - please help me Alexandre Aguiar <gnuhealth@asaguiar.net> - 2012-02-03 22:42 -0200
  Re: sed - please help me Szyk <szyk100@o2.pl> - 2012-02-04 15:18 +0100
    Re: sed - please help me Alexandre Aguiar <gnuhealth@asaguiar.net> - 2012-02-05 11:07 -0200

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