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feat(library/coercion): add for_each_coercion procedure

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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
This commit is contained in:
Leonardo de Moura 2014-05-25 07:24:58 -07:00
parent a408883c92
commit e9e61fec51
2 changed files with 74 additions and 8 deletions
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75
src/library/coercion.cpp
View file

@ -409,6 +409,37 @@ bool get_user_coercions(environment const & env, expr const & C, buffer<std::pai
return r; return r;
} }
template<typename F>
void for_each_coercion(environment const & env, F && f) {
coercion_ext const & ext = get_extension(env);
ext.m_from.for_each([&](name const & C, list<coercion_info> const & infos) {
for (auto const & info : infos) {
f(C, info);
}
});
}
void for_each_coercion_user(environment const & env,
std::function<void(name const &, name const &, expr const &, level_param_names const &, unsigned)> const & f) {
for_each_coercion(env, [&](name const & C, coercion_info const & info) {
if (info.m_to.kind() == coercion_class_kind::User) f(C, info.m_to.get_name(), info.m_fun, info.m_level_params, info.m_num_args);
});
}
void for_each_coercion_sort(environment const & env,
std::function<void(name const &, expr const &, level_param_names const &, unsigned)> const & f) {
for_each_coercion(env, [&](name const & C, coercion_info const & info) {
if (info.m_to.kind() == coercion_class_kind::Sort) f(C, info.m_fun, info.m_level_params, info.m_num_args);
});
}
void for_each_coercion_fun(environment const & env,
std::function<void(name const &, expr const &, level_param_names const &, unsigned)> const & f) {
for_each_coercion(env, [&](name const & C, coercion_info const & info) {
if (info.m_to.kind() == coercion_class_kind::Fun) f(C, info.m_fun, info.m_level_params, info.m_num_args);
});
}
static int add_coercion(lua_State * L) { static int add_coercion(lua_State * L) {
int nargs = lua_gettop(L); int nargs = lua_gettop(L);
if (nargs == 2) if (nargs == 2)
@ -453,14 +484,42 @@ static int get_user_coercions(lua_State * L) {
return 1; return 1;
} }
static int for_each_coercion(lua_State * L, coercion_class_kind k) {
environment env = to_environment(L, 1);
luaL_checktype(L, 2, LUA_TFUNCTION); // user-fun
for_each_coercion(env, [&](name const & C, coercion_info const & info) {
if (info.m_to.kind() != k)
return;
lua_pushvalue(L, 2); // push user-fun
push_name(L, C);
int nargs = 4;
if (info.m_to.kind() == coercion_class_kind::User) {
push_name(L, info.m_to.get_name());
nargs++;
}
push_expr(L, info.m_fun);
push_list_name(L, info.m_level_params);
push_integer(L, info.m_num_args);
pcall(L, nargs, 0, 0);
});
return 0;
}
static int for_each_coercion_user(lua_State * L) { return for_each_coercion(L, coercion_class_kind::User); }
static int for_each_coercion_sort(lua_State * L) { return for_each_coercion(L, coercion_class_kind::Sort); }
static int for_each_coercion_fun(lua_State * L) { return for_each_coercion(L, coercion_class_kind::Fun); }
void open_coercion(lua_State * L) { void open_coercion(lua_State * L) {
SET_GLOBAL_FUN(add_coercion, "add_coercion"); SET_GLOBAL_FUN(add_coercion, "add_coercion");
SET_GLOBAL_FUN(is_coercion, "is_coercion"); SET_GLOBAL_FUN(is_coercion, "is_coercion");
SET_GLOBAL_FUN(has_coercions_from, "has_coercions_from"); SET_GLOBAL_FUN(has_coercions_from, "has_coercions_from");
SET_GLOBAL_FUN(has_coercions_to, "has_coercions_to"); SET_GLOBAL_FUN(has_coercions_to, "has_coercions_to");
SET_GLOBAL_FUN(get_coercion, "get_coercion"); SET_GLOBAL_FUN(get_coercion, "get_coercion");
SET_GLOBAL_FUN(get_coercion_to_sort, "get_coercion_to_sort"); SET_GLOBAL_FUN(get_coercion_to_sort, "get_coercion_to_sort");
SET_GLOBAL_FUN(get_coercion_to_fun, "get_coercion_to_fun"); SET_GLOBAL_FUN(get_coercion_to_fun, "get_coercion_to_fun");
SET_GLOBAL_FUN(get_user_coercions, "get_user_coercions"); SET_GLOBAL_FUN(get_user_coercions, "get_user_coercions");
SET_GLOBAL_FUN(for_each_coercion_user, "for_each_coercion_user");
SET_GLOBAL_FUN(for_each_coercion_sort, "for_each_coercion_sort");
SET_GLOBAL_FUN(for_each_coercion_fun, "for_each_coercion_fun");
} }
} }

7
src/library/coercion.h
View file

@ -62,5 +62,12 @@ optional<expr> get_coercion_to_fun(environment const & env, expr const & C);
*/ */
bool get_user_coercions(environment const & env, expr const & C, buffer<std::pair<expr, name>> & result); bool get_user_coercions(environment const & env, expr const & C, buffer<std::pair<expr, name>> & result);
void for_each_coercion_user(environment const & env,
std::function<void(name const &, name const &, expr const &, level_param_names const &, unsigned)> const & f);
void for_each_coercion_sort(environment const & env,
std::function<void(name const &, expr const &, level_param_names const &, unsigned)> const & f);
void for_each_coercion_fun(environment const & env,
std::function<void(name const &, expr const &, level_param_names const &, unsigned)> const & f);
void open_coercion(lua_State * L); void open_coercion(lua_State * L);
} }