Subject: Re: Ada Web

From: ngcr<@fs>@Princeton.EDU (Sylvester Fernandez)
Date: Thu, 10 Jan 91 15:22:39 CST

All the bugs I found were in the grammar. Here is the modified
version we are using now:

-----------
ada.spider
-----------
# Copyright 1989 by Norman Ramsey, Odyssey Research Associates
# Not to be sold, but may be used freely for any purpose
# For more information, see file COPYRIGHT in the parent directory

# Modified by Sylvester Fernandez

language Ada extension ada

at_sign @

module definition stmt use stmt

comment begin <dash-dash> end newline
macros begin
\def\commentbegin{{\tt -- }}
macros end

line begin <dash-dash-"line"> end <"">

default translation <*> mathness yes

token identifier category math mathness maybe
token number category math mathness yes
token newline category ignore_scrap translation <> mathness maybe 
token pseudo_semi translation <> category semi mathness maybe

macros begin
\let\R\relax
macros end

# Delimiters
token & category binop translation <"\\amp">
token ( category open 
token ) category close 
token * category binop
token + category unorbinop
token , category binop translation <",\\,"-opt-3>
token - category unorbinop
token . category binop
token / category binop
token : category binop 
token ; category semi translation <";"-space-opt-2> 
token < category binop
token = category binop
token > category binop
token | category binop translation <"\\mid"> 

# Compound delimiters

token => category arrow translation <"\\AR">
token .. category binop translation <"\\.{..}\\>">
token ** category binop translation <"\\mathbin{**}">
token := category binop translation <"\\mathbin{:=}">
token /= translation <"\\I"> category binop 
token >= translation <"\\G"> category binop 
token <= translation <"\\L"> category binop 
token << translation <"\\LL"> category openlabel 
token >> translation <"\\GG"> category closelabel 
token <> translation <"\\LG"> category math

# Hacks no ', and this becomes a binary op
token ' category binop mathness no 

token # category math translation <"\\#"> 

default mathness maybe translation <*>

reserved abort ilk math_like
reserved abs ilk unop_like
reserved accept ilk proc_like
reserved access ilk math_like
reserved all ilk math_like
reserved and ilk and_like
reserved array ilk math_like
reserved at ilk at_like
reserved begin ilk begin_like
reserved body ilk math_like
reserved case ilk case_like
reserved constant ilk math_like
reserved declare ilk decl_like
reserved delay ilk math_like
reserved delta ilk math_like
reserved digits ilk math_like
reserved do ilk do_like
reserved else ilk else_like
reserved elsif ilk elsif_like
reserved end ilk end_like
reserved entry ilk proc_like
reserved exception ilk ex_like
reserved exit ilk math_like
reserved for ilk math_like
reserved function ilk proc_like
reserved generic ilk gen_like
reserved goto ilk math_like
reserved if ilk if_like
reserved in ilk unorbinop_like
reserved is ilk is_like 
reserved limited ilk math_like
reserved loop ilk loop_like
reserved mod ilk binop_like
reserved new ilk unop_like
reserved not ilk unop_like
reserved null ilk math_like
reserved of ilk math_like
reserved or ilk or_like
reserved others ilk math_like
reserved out ilk math_like
reserved package ilk proc_like
reserved pragma ilk math_like
reserved private ilk private_like
reserved procedure ilk proc_like
reserved raise ilk math_like
reserved range ilk math_like
reserved record ilk record_like
reserved rem ilk binop_like
reserved renames ilk math_like
reserved return ilk math_like
reserved reverse ilk math_like
reserved select ilk select_like
reserved separate ilk separate_like
reserved subtype ilk math_like
reserved task ilk proc_like
reserved terminate ilk math_like
reserved then ilk then_like
reserved type ilk math_like
reserved use ilk math_like
reserved when ilk when_like
reserved while ilk math_like
reserved with ilk with_like
reserved xor ilk binop_like

ilk and_like translation <*> category and
ilk at_like translation <*> category at
ilk begin_like translation <*-indent> category beginning
ilk binop_like translation <"\\"-space-*-"\\"-space> category binop
ilk case_like translation <*> category case
ilk decl_like translation <*-indent> category declaration
ilk do_like translation <*> category do
ilk else_like translation <*> category else
ilk elsif_like translation <*> category elsif
ilk end_like translation <*> category close
ilk ex_like translation <*> category exception
ilk gen_like translation <*-indent> category generic
ilk if_like translation <*> category if
ilk is_like translation <*> category is
ilk loop_like translation <*> category loop
ilk math_like translation <*> category math
ilk or_like translation <*> category or
ilk private_like translation <*> category private
ilk proc_like translation <force-*> category proc
ilk record_like translation <*> category record
ilk select_like translation <*> category select
ilk separate_like translation <*> category separate
ilk then_like translation <*> category then
ilk unop_like translation <*-"\\"-space> category unop
ilk unorbinop_like translation <"\\"-space-*-"\\"-space> category resunorbinop
ilk when_like translation <*> category when
ilk with_like translation <*> category with

# \MC means ``math close'' and sets \MS to ``math set''
macros begin
\def\MC{\ifmmode\global\let\MS$\else\global\let\MS\relax\fi\relax\MS}
\def\LG{\mathord{<}\mathord{>}}
\let\IG=\ignorespaces
macros end

beginning <outdent-force> continuation <outdent-force> ending --> stmt
beginning <outdent-force> ending --> stmt
# beginning <force> (stmt|ignore_scrap) --> beginning
beginning <force> stmt --> beginning

case <"\\"-space> math <"\\"-space> is <indent-force> --> beginning

close semi --> ending
close <"\\"-space> ? semi --> ending
close <"\\"-space> ? <"\\"-space> ? semi --> ending

continuation <force> stmt --> continuation
continuation <outdent-force> continuation --> continuation

declaration <outdent-force> beginning <outdent-force> continuation <outdent-force> ending --> stmt
declaration <outdent-force> beginning <outdent-force> ending --> stmt
declaration <outdent-force> ending --> stmt
declaration <force> (declaration|stmt) --> declaration

else <indent-force> --> continuation
elsif <"\\"-space> math <"\\"-space> then <indent-force> --> continuation

exception <indent-force> --> continuation

generic <outdent-force> declaration --> declaration
generic <force> stmt --> generic

if <"\\"-space> math <"\\"-space> then --> ifthen
ifthen <indent-force> stmt --> beginning
ifthen <indent-force> <"\\"-space> math <"\\"-space> <outdent-force> else --> ifthen
ifthen <indent-force> <"\\"-space> math <"\\"-space> <outdent-force> close <"\\"-space> if --> math
ifthen <indent-force> <"\\"-space> math <"\\"-space> <outdent-force> elsif --> if

is --> math

loop <indent-force> --> beginning

math [ <"\\"-space> and <"\\"-space> then <"\\"-space> ] --> math binop
math [ <"\\"-space> and <"\\"-space> ] --> math binop

math (binop|unorbinop) math --> math
math <"\\"-space> resunorbinop <"\\"-space>  math --> math
(unorbinop|unop) math --> math
resunorbinop <"\\"-space>  math --> math
# This doesn't apply in Ada:  math unop --> math

math arrow --> math
math <"\\"-space> at --> math
math binop <"\\"-space> exception --> math
math <"\\"-space> is --> math
math <"\\"-space> loop --> loop
math <"\\"-space> math --> math
math [ <"\\"-space> or <"\\"-space> else <"\\"-space> ] --> math binop
math [ <"\\"-space> or <"\\"-space> ] --> math binop
math <"\\"-space> private --> math
math <"\\"-space> separate --> math
math <indent-force> stmt <outdent-force> --> stmt
math terminator --> stmt

open close --> math
open math close --> math
open [ math semi ] --> open math

<force-backup> openlabel math closelabel <force> --> math

or <indent-force> --> continuation

private <indent-force> --> beginning

proc <"\\"-space> math <"\\"-space> is <"\\"-space> unop --> math
proc <"\\"-space> math <"\\"-space> is <"\\"-space> separate --> math
proc <"\\"-space> math <"\\"-space> is <indent-force> --> declaration
proc <"\\"-space> math <"\\"-space> do <indent-force> --> beginning
proc <"\\"-space> math terminator <force> --> declaration

#record <"\\"-space> at <"\\"-space> math terminator <indent-force> --> beginning
record <indent-force> --> beginning

select <indent-force> --> beginning

semi --> terminator

separate math --> stmt

stmt <force> declaration --> declaration

stmt <force> stmt --> stmt

stmt <outdent-force> ending --> stmt

when <"\\"-space> math arrow <indent-force> --> whengroup
[ when <"\\"-space> math ] terminator --> math terminator
whengroup stmt <outdent-force> ending --> ending
whengroup stmt <outdent-force> continuation --> continuation
whengroup stmt <outdent-force> whengroup --> whengroup

with <"\\"-space> math --> math
with <"\\"-space> proc <"\\"-space> math --> math

? ignore_scrap --> #1

macros begin
\let\AR=\Longrightarrow
macros end
------------------
End of ada.spider
------------------

I'll let you know about the change you suggested. Until the problem 
has been fixed, I have asked users here not use bases larger than ten 
when specifying numeric constants.

						Sylvester Fernandez