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Post: Use choice instead of or.

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This commit is contained in:
Nick Alexander 2017-05-05 13:14:37 -07:00
parent d1ac752de6
commit 409a2ea78f
1 changed files with 8 additions and 4 deletions
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12
tx-parser/src/lib.rs
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@ -21,11 +21,13 @@ extern crate mentat_tx;
extern crate mentat_parser_utils;
use combine::{
choice,
eof,
many,
parser,
satisfy,
satisfy_map,
try,
Parser,
ParseResult,
};
@ -90,10 +92,12 @@ def_parser!(Tx, nested_vector, Vec<AtomOrLookupRefOrVectorOrMapNotation>, {
});
def_parser!(Tx, atom_or_lookup_ref_or_vector, AtomOrLookupRefOrVectorOrMapNotation, {
Tx::lookup_ref().map(AtomOrLookupRefOrVectorOrMapNotation::LookupRef)
.or(Tx::nested_vector().map(AtomOrLookupRefOrVectorOrMapNotation::Vector))
.or(Tx::map_notation().map(AtomOrLookupRefOrVectorOrMapNotation::MapNotation))
.or(Tx::atom().map(|x| x.clone()).map(AtomOrLookupRefOrVectorOrMapNotation::Atom))
choice::<[&mut Parser<Input = _, Output = AtomOrLookupRefOrVectorOrMapNotation>; 4], _>
([&mut try(Tx::lookup_ref().map(AtomOrLookupRefOrVectorOrMapNotation::LookupRef)),
&mut Tx::nested_vector().map(AtomOrLookupRefOrVectorOrMapNotation::Vector),
&mut Tx::map_notation().map(AtomOrLookupRefOrVectorOrMapNotation::MapNotation),
&mut Tx::atom().map(|x| x.clone()).map(AtomOrLookupRefOrVectorOrMapNotation::Atom)
])
});
def_matches_namespaced_keyword!(Tx, literal_db_add, "db", "add");