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############################################################################
#
# File: plural.icn
#
# Subject: Procedures to produce plural of English noun
#
# Author: Ralph E. Griswold
#
# Date: July 15, 1995
#
############################################################################
#
# This file is in the public domain.
#
############################################################################
#
# This procedure produces the plural form of a singular English noun.
# The procedure here is rudimentary and does not work in all cases.
#
############################################################################
procedure plural(word) #: produce plural of word
local lcword
static plural_map, plural_id, plural_s
initial {
plural_map := table()
plural_map["mouse"] := "mice"
plural_map["louse"] := "lice"
plural_map["goose"] := "geese"
plural_map["datum"] := "data"
plural_id := set()
every insert(plural_id,"chassis" | "fish" | "sheep" | "semantics")
plural_s := set()
every insert(plural_s,"roman" | "norman" | "human" | "shaman" |
"german" | "talisman" | "superhuman")
}
lcword := map(word)
if member(plural_id,lcword) then return word
if member(plural_s,lcword) then return word || "s"
(lcword := \plural_map[lcword]) | {
lcword ?:= {
(tab(-3) || (match("man") & "men")) |
(tab(-3) || (match("sis") & "ses")) |
(tab(-2) || =("ch" | "sh" | "ss") || "es") |
(tab(-3) || (="tus" & "ti")) |
(tab(-2) || tab(any('cbdghmnprstvxz')) || (match("y") & "ies")) |
(tab(-1) || tab(any('xz')) || "es") |
(tab(0) || "s")
}
}
if word ? any(&ucase) then lcword ?:= {
map(move(1),&lcase,&ucase) || tab(0)
}
return lcword
end
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