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feat(frontends/lean/server): give preference to prefix matches

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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
This commit is contained in:
Leonardo de Moura 2014-09-05 21:57:35 -07:00
parent 629feb77ef
commit bdb91f6783
1 changed files with 37 additions and 5 deletions
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42
src/frontends/lean/server.cpp
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@ -489,6 +489,33 @@ void server::display_decl(name const & short_name, name const & long_name, envir
out << short_name << "|" << mk_pair(flatten(out.get_formatter()(d.get_type())), o) << "\n";
}
optional<name> is_uniquely_aliased(environment const & env, name const & n) {
if (auto it = is_expr_aliased(env, n))
if (length(get_expr_aliases(env, *it)) == 1)
return it;
return optional<name>();
}
/** \brief Return an (atomic) name if \c n can be referenced by this atomic
name in the given environment. */
optional<name> is_essentially_atomic(environment const & env, name const & n) {
if (n.is_atomic())
return optional<name>(n);
list<name> const & ns_list = get_namespaces(env);
for (name const & ns : ns_list) {
if (is_prefix_of(ns, n)) {
auto n_prime = n.replace_prefix(ns, name());
if (n_prime.is_atomic())
return optional<name>(n_prime);
break;
}
}
if (auto it = is_uniquely_aliased(env, n))
if (it->is_atomic())
return it;
return optional<name>();
}
void server::display_decl(name const & d, environment const & env, options const & o) {
// using namespace override resolution rule
list<name> const & ns_list = get_namespaces(env);
@ -499,11 +526,8 @@ void server::display_decl(name const & d, environment const & env, options const
}
}
// if the alias is unique use it
if (auto it = is_expr_aliased(env, d)) {
if (length(get_expr_aliases(env, *it)) == 1)
display_decl(*it, d, env, o);
else
display_decl(d, d, env, o);
if (auto it = is_uniquely_aliased(env, d)) {
display_decl(*it, d, env, o);
} else {
display_decl(d, d, env, o);
}
@ -546,6 +570,14 @@ void server::find_pattern(unsigned line_num, std::string const & pattern) {
bitap_fuzzy_search matcher(pattern, max_errors);
env.for_each_declaration([&](declaration const & d) {
std::string text = d.get_name().to_string();
if (auto it = is_essentially_atomic(env, d.get_name())) {
std::string it_str = it->to_string();
// if pattern "perfectly" matches beginning of declaration name, we just display d on the top of the list
if (it_str.compare(0, pattern.size(), pattern) == 0) {
display_decl(*it, d.get_name(), env, opts);
return;
}
}
if (matcher.match(text))
selected.emplace_back(text, d.get_name());
});