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resource MutationsGla = open CharactersGla in {
param Mutation = Unmutated|Lenition1|Lenition1DNTLS|Lenition2|PrefixT|PrefixH;
--Turns a string into a mutation table
oper mutate : (_ : Str) -> (Mutation => Str) = \str -> table {
Unmutated => str ;
Lenition1 => lenition1 str ;
Lenition1DNTLS => lenition1dntls str ;
Lenition2 => lenition2 str ;
PrefixT => prefixT str ;
PrefixH => prefixH str
};
--Performs lenition 1: inserts "h" if the word begins with a lenitable character
oper lenition1 : Str -> Str = \str -> case str of {
start@("p"|"b"|"m"|"f"|"t"|"d"|"c"|"g") + rest => start + "h" + rest ;
start@("P"|"B"|"M"|"F"|"T"|"D"|"C"|"G") + rest => start + "h" + rest ;
("s"|"S") + ("p"|"t"|"c") + _ => str ; --the sequences "sp", "st", "sc" are never mutated
start@("s"|"S") + rest => start + "h" + rest ;
_ => str
};
--Performs lenition 1 with dentals: same as lenition 1 but leaves "d", "t" and "s" unmutated
oper lenition1dntls : Str -> Str = \str -> case str of {
start@("p"|"b"|"m"|"f"|"c"|"g") + rest => start + "h" + rest ;
start@("P"|"B"|"M"|"F"|"C"|"G") + rest => start + "h" + rest ;
_ => str
};
--Performs lenition 2: same as lenition 1 with dentals but also changes "s" into "ts"
oper lenition2 : Str -> Str = \str -> case str of {
start@("p"|"b"|"m"|"f"|"c"|"g") + rest => start + "h" + rest ;
start@("P"|"B"|"M"|"F"|"C"|"G") + rest => start + "h" + rest ;
("s"|"S") + ("p"|"t"|"c") + _ => str ; --the sequences "sp", "st", "sc" are never mutated
start@("s"|"S") + rest => "t-" + start + rest ;
_ => str
};
--Prefixes a "t" to words beginning with a vowel
oper prefixT : Str -> Str = \str -> case str of {
start@(#vowel) + rest => "t-" + start + rest ;
start@(#vowelCap) + rest => "t-" + start + rest ;
_ => str
};
--Prefixes a "h" to words beginning with a vowel
oper prefixH : Str -> Str = \str -> case str of {
start@(#vowel) + rest => "h-" + start + rest ;
start@(#vowelCap) + rest => "h-" + start + rest ;
_ => str
};
}
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