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[Maude-help] why have syntax error when same as example in book

From: Lee Martin CCNP <tesleft AT hotmail.com>
To: "maude-help AT cs.uiuc.edu" <maude-help AT cs.uiuc.edu>
Subject: [Maude-help] why have syntax error when same as example in book
Date: Thu, 8 May 2014 21:44:56 +0800
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book All about maude page 133

Maude> load vend2.maude
Warning: "vend2.maude", line 4 (mod VENDING-MACHINE): syntax error

vend2.maude
mod VENDING-MACHINE is
    including VENDING-MACHINE-SIGNATURE .
    var M : Marking .
    r1 [add-q] : M => M q .
    r1 [add-$] : M => M $ .
    r1 [buy-c] : $ => c .
    r1 [buy-a] : $ => a q .
    r1 [change] : q q q q => $ .
endm

vend1.maude
fmod VENDING-MACHINE-SIGNATURE is
    sorts Coin Item Marking .
    subsorts Coin Item < Marking .
    op __ : Marking Marking -> Marking [assoc comm id: null] .
    op null : -> Marking .
    op $ : -> Coin [format (r! o)] .
    op q : -> Coin [format (r! o)] .
    op a : -> Coin [format (b! o)] .
    op c : -> Coin [format (b! o)] .
endfm

[Maude-help] why have syntax error when same as example in book, Lee Martin CCNP, 05/08/2014
- Re: [Maude-help] why have syntax error when same as example in book, Francisco Durán, 05/08/2014