RCRPG/Tcl

From Rosetta Code
RCRPG/Tcl is part of RCRPG. You may find other members of RCRPG at Category:RCRPG.

This Tcl version of RCRPG was typed and tested on a cellphone, so pardon my brevity.

#!/usr/bin/env tclsh
proc help args {
return "RosettaCode 3D single user dungeon in Tcl. Type a command:
e(ast), w(est), n(orth), s(outh), u(p), d(own)
t(ake) sth|all, drop sth|all
a(ttack) direction: to break a hole in the wall (needs sledge)
describe  : get told where you are
i(nventory) : get told what you have
For going up, you also need a ladder."
}
 
proc main argv {
Room 0,0,0 StartRoom sledge
Room 1,1,5 PrizeRoom {gold gold gold}
array set ::Self {coords 0,0,0 items {}}
foreach i {east west north south up down} {
alias $i = go $i
alias [string index $i 0] = go $i
}
foreach {new old} {a attack i inventory t take} {
alias $new = $old
}
puts [help]
describe
while 1 { #-- Read-Eval-Print loop
puts -nonewline "> "; flush stdout
catch [gets stdin] res
if {$res ne ""} {puts $res}
}
}
 
proc Room {xyz {name {}} {items {}}} { #-- "constructor"
if {$name eq ""} {set name R.[incr ::R()]}
if {![llength $items]} {set items [lpick {sledge {} ladder gold}]}
array set ::R [list $xyz.name $name $xyz.items $items $xyz.exits {}]
}
 
proc Inverse where {
switch -- $where {
east {I west} west {I east}
north {I south} south {I north}
up {I down} down {I up}
default {error "bad direction $where"}
}
}
 
proc Normalize where {
switch -- $where {
e {I east} w {I west} n {I north} s {I south}
u {I up} d {I down}
default {I $where}
}
}
 
proc attack where {
if {"sledge" ni $::Self(items)} {return "need sledge to attack!"}
set where [Normalize $where]
set xyz $::Self(coords)
if {$where in $::R($xyz.exits)} {
puts "No need to attack.."
return [go $where]
}
if {$where eq "up" && "ladder" ni $::R($xyz.items)} {
return "You can't go up without a ladder."
}
lappend ::R($xyz.exits) $where
go $where 0
lappend ::R($::Self(coords).exits) [Inverse $where]
describe
}
 
proc describe {} {
set xyz $::Self(coords)
set name $::R($xyz.name)
set items [pretty $::R($xyz.items)]
puts "You are in $name ($xyz) and see $items."
if {$name eq "PrizeRoom"} {
puts "Congratulations - you won!"
exit
}
set exits $::R($xyz.exits)
if {![llength $exits]} {set exits nowhere}
puts "There are exits towards: [join $exits {, }]"
inventory
}
 
proc drop what {
set xyz $::Self(coords)
if {$what eq "all"} {set what $::Self(items)}
foreach i $what {
if {$i ni $::Self(items)} {return "You don't carry a $i."}
lremove ::Self(items) $i
lappend ::R($xyz.items) $i
}
inventory
}
 
proc go {where {describe 1}} {
set where [Normalize $where]
if {$where ni $::R($::Self(coords).exits)} {
return "No exit $where, consider an attack."
}
if {$where eq "up" && "ladder" ni $::R($::Self(coords).items)} {
return "You can't go up without a ladder."
}
foreach {x y z} [split $::Self(coords) ,] break
switch -- $where {
east {incr x} west {incr x -1}
north {incr y} south {incr y -1}
up {incr z} down {incr z -1}
}
set xyz $x,$y,$z
if {![info exists ::R($xyz.name)]} {Room $xyz}
set ::Self(coords) $xyz
if {$describe} describe
}
 
proc inventory {} {
return "You have [pretty $::Self(items)]."
}
 
proc name what {
set ::R($::Self(coords).name) $what
return "This room is now named $what."
}
 
proc take what {
set xyz $::Self(coords)
if {$what eq "all"} {set what $::R($xyz.items)}
foreach i $what {
if {$i ni $::R($xyz.items)} {return "There is no $i here."}
lremove ::R($xyz.items) $i
lappend ::Self(items) $i
}
inventory
}
 
#--- general utilities
proc alias {new = args} {interp alias {} $new {} {*}$args}
proc I x {return $x} ;# identity
proc lpick lst {lindex $lst [expr {int(rand()*[llength $lst])}]}
proc lremove {_lst what} {
upvar 1 $_lst lst
set pos [lsearch -exact $lst $what]
set lst [lreplace $lst $pos $pos]
}
proc pretty lst {
if {![llength $lst]} {return nothing}
foreach i $lst {lappend tmp "a $i"}
regsub {(.+),} [join $tmp ", "] {\1, and}
}
 
main $argv

Alternative Version[edit]

The following version is functionally identical, but uses a setter/getter function "@" to hide away the data representation from most of the code (except in the definition of "@" itself). Examples:

   @ my coords $x,$y,$z         ;#-- modify an "instance variable"
   set items [@ my items]       ;#-- items I carry
   set items [@ here items]     ;#-- items in the current room
   set items [@ $x,$y,$z items] ;#-- items in the given room
   lappend [@ my items &] teacup ;#-- returns a reference  
proc help args {
return "RosettaCode 3D single-user dungeon in Tcl. Type a command:
e(ast), s(outh), n(orth), w(est), u(p), d(own)
t(ake) something|all, drop something|all
a(ttack) direction: to break a wall (needs a sledge)
d(escribe): get told where you are
help: get this message
i(nventory): get told what you have
name something: give the current room another name
For going up, you also need a ladder."
}
 
proc main argv {
Room 0,0,0 StartRoom sledge
Room 1,1,5 PrizeRoom {gold gold gold}
@ my coords 0,0,0
@ my items {}
foreach i {east west north south up down} {
alias $i = go $i
alias [string index $i 0] = $i
}
foreach {new old} {a attack d describe i inventory t take} {
alias $new = $old
}
puts [help]
describe
while 1 { #-- REPL: Read-Eval-Print Loop
puts -nonewline "> "; flush stdout
catch [gets stdin] res
if {$res ne ""} {puts $res}
}
}
 
proc Room {xyz {name {}} {items {}}} { #-- "constructor"
if {$name eq ""} {set name R.[incr ::ID]}
if {$items eq {}} {set items [lpick {sledge {} ladder gold}]}
@ $xyz name $name
@ $xyz items $items
@ $xyz exits {}
}
 
proc Inverse where {
switch -- $where {
east {I west} west {I east}
north {I south} south {I north}
up {I down} down {I up}
default {error "No inverse defined for $where"}
}
}
 
proc Normalize where {
switch -- $where {
e {I east} w {I west} n {I north} s {I south} u {I up} d {I down}
default {I $where}
}
}
 
proc @ {coords what {value --}} { #-- universal setter/getter
if {$coords eq "my"} {
if {$value eq "--"} {return $::Self($what)}
return [expr {$value eq "&"? "::Self($what)" : [set ::Self($what) $value]}]
}
if {$coords eq "here"} {set coords $::Self(coords)}
if {$value eq "&"} {return ::R($coords.$what)} ;# reference
if {$value eq "--"} {
set ::R($coords.$what)
} else {set ::R($coords.$what) $value}
}
 
#------------------- commands in Afferbeck Lauder
proc attack where {
set where [Normalize $where]
set coords [@ my coords]
if {$where in [@ $coords exits]} {
puts "No need to attack $where, the road is open."
return [go $where]
} elseif {"sledge" ni [@ my items]} {
return "You can't attack without a sledge."
}
if {$where eq "up"} {
if {"ladder" ni [@ $coords items]} {
return "You can't go up without a ladder."
}
}
lappend [@ here exits &] $where
go $where 0 ;#-- describe later
lappend [@ here exits &] [Inverse $where]
describe
}
 
proc describe {} {
set coords [@ my coords]
set name [@ here name]
puts "You are in $name ($coords). You see [pretty [@ here items]]."
if {$name eq "PrizeRoom"} {
puts "Congratulations -- You Won!!!"; exit
}
set exits [@ here exits]
if {![llength $exits]} {set exits nowhere}
puts "There are exits towards: [join $exits {, }]."
inventory
}
 
proc drop what {
if {$what eq "all"} {set what [@ my items]}
foreach i $what {
if {$i ni [@ my items]} {return "You don't have a $i."}
lremove [@ my items &] $i
lappend [@ here items &] $i
}
inventory
}
 
proc go {where {describe 1}} {
set where [Normalize $where]
foreach {x y z} [split [@ my coords] ,] break
switch -- $where {
east {incr x} west {incr x -1}
north {incr y} south {incr y -1}
up {incr z} down {incr z -1}
default {return "usage: go (east|west|north|south|up|down)"}
}
set coords $x,$y,$z
if {$where eq "up" && "ladder" ni [@ here items]} {
return "You can't go up without a ladder."
}
if {$where ni [@ here exits]} {
return "No exit towards $where, consider an attack..."
}
if {[catch {@ $coords name}]} {Room $coords}
@ my coords $coords
if {$describe} describe
}
 
proc inventory {} {return "You have [pretty [@ my items]]."}
proc name what {
return "This room is now named [@ here name $what]."
}
 
proc take what {
if {$what eq "all"} {set what [@ here items]}
foreach i $what {
if {$i ni [@ here items]} {return "There is no $i here."}
lremove [@ here items &] $i
lappend [@ my items &] $i
}
inventory
}
 
#----------------------- general utilities
proc alias {new = args} {interp alias {} $new {} {*}$args}
proc I x {return $x} ;#-- Identity: simple but useful
proc lpick lst {lindex $lst [expr {int(rand()*[llength $lst])}]}
proc lremove {_lst what} {
upvar 1 $_lst lst
set pos [lsearch -exact $lst $what]
set lst [lreplace $lst $pos $pos]
}
proc pretty lst {
if {![llength $lst]} {return nothing}
foreach i $lst {lappend tmp [expr {$i eq "gold"? $i : "a $i"}]}
regsub {(.+),} [join $tmp ", "] {\1, and}
}
main $argv