Pre: Move core/types.rs into core_traits

core-traits/Cargo.toml

@@ -7,5 +7,16 @@ workspace = ".."
 name = "core_traits"
 path = "lib.rs"
 
+[dependencies]
+chrono = { version = "0.4", features = ["serde"] }
+enum-set = "0.0.7"
+lazy_static = "0.2"
+indexmap = "1"
+ordered-float = { version = "0.5", features = ["serde"] }
+uuid = { version = "0.5", features = ["v4", "serde"] }
+serde = { version = "1.0", features = ["rc"] }
+serde_derive = "1.0"
+
 [dependencies.edn]
 path = "../edn"
+features = ["serde_support"]

core-traits/lib.rs

@@ -8,7 +8,61 @@
 // CONDITIONS OF ANY KIND, either express or implied. See the License for the
 // specific language governing permissions and limitations under the License.
 
+extern crate enum_set;
+extern crate ordered_float;
+extern crate chrono;
+extern crate indexmap;
+#[macro_use] extern crate serde_derive;
+extern crate uuid;
 extern crate edn;
+#[macro_use]
+extern crate lazy_static;
+
+use std::fmt;
+
+use std::ffi::{
+    CString,
+};
+
+use std::ops::{
+    Deref,
+};
+
+use std::os::raw::{
+    c_char,
+};
+
+use std::rc::{
+    Rc,
+};
+
+use std::sync::{
+    Arc,
+};
+
+use indexmap::{
+    IndexMap,
+};
+
+use enum_set::EnumSet;
+
+use ordered_float::OrderedFloat;
+
+use chrono::{
+    DateTime,
+    Timelike,
+};
+
+use uuid::Uuid;
+
+use edn::{
+    Cloned,
+    ValueRc,
+    Utc,
+    Keyword,
+    FromMicros,
+    FromRc,
+};
 
 use edn::entities::{
     AttributePlace,
@@ -18,6 +72,8 @@ use edn::entities::{
     TransactableValueMarker,
 };
 
+pub mod values;
+
 /// Represents one entid in the entid space.
 ///
 /// Per https://www.sqlite.org/datatype3.html (see also http://stackoverflow.com/a/8499544), SQLite
@@ -53,3 +109,752 @@ impl<V: TransactableValueMarker> Into<ValuePlace<V>> for KnownEntid {
         ValuePlace::Entid(EntidOrIdent::Entid(self.0))
     }
 }
+
+/// The attribute of each Mentat assertion has a :db/valueType constraining the value to a
+/// particular set.  Mentat recognizes the following :db/valueType values.
+#[derive(Clone, Copy, Debug, Eq, Hash, Ord, PartialOrd, PartialEq)]
+#[repr(u32)]
+pub enum ValueType {
+    Ref,
+    Boolean,
+    Instant,
+    Long,
+    Double,
+    String,
+    Keyword,
+    Uuid,
+}
+
+impl ValueType {
+    pub fn all_enums() -> EnumSet<ValueType> {
+        // TODO: lazy_static.
+        let mut s = EnumSet::new();
+        s.insert(ValueType::Ref);
+        s.insert(ValueType::Boolean);
+        s.insert(ValueType::Instant);
+        s.insert(ValueType::Long);
+        s.insert(ValueType::Double);
+        s.insert(ValueType::String);
+        s.insert(ValueType::Keyword);
+        s.insert(ValueType::Uuid);
+        s
+    }
+}
+
+
+impl ::enum_set::CLike for ValueType {
+    fn to_u32(&self) -> u32 {
+        *self as u32
+    }
+
+    unsafe fn from_u32(v: u32) -> ValueType {
+        ::std::mem::transmute(v)
+    }
+}
+
+impl ValueType {
+    pub fn into_keyword(self) -> Keyword {
+        Keyword::namespaced("db.type", match self {
+            ValueType::Ref => "ref",
+            ValueType::Boolean => "boolean",
+            ValueType::Instant => "instant",
+            ValueType::Long => "long",
+            ValueType::Double => "double",
+            ValueType::String => "string",
+            ValueType::Keyword => "keyword",
+            ValueType::Uuid => "uuid",
+        })
+    }
+
+    pub fn from_keyword(keyword: &Keyword) -> Option<Self> {
+        if keyword.namespace() != Some("db.type") {
+            return None;
+        }
+
+        return match keyword.name() {
+            "ref" => Some(ValueType::Ref),
+            "boolean" => Some(ValueType::Boolean),
+            "instant" => Some(ValueType::Instant),
+            "long" => Some(ValueType::Long),
+            "double" => Some(ValueType::Double),
+            "string" => Some(ValueType::String),
+            "keyword" => Some(ValueType::Keyword),
+            "uuid" => Some(ValueType::Uuid),
+            _ => None,
+        }
+    }
+
+    pub fn into_typed_value(self) -> TypedValue {
+        TypedValue::typed_ns_keyword("db.type", match self {
+            ValueType::Ref => "ref",
+            ValueType::Boolean => "boolean",
+            ValueType::Instant => "instant",
+            ValueType::Long => "long",
+            ValueType::Double => "double",
+            ValueType::String => "string",
+            ValueType::Keyword => "keyword",
+            ValueType::Uuid => "uuid",
+        })
+    }
+
+    pub fn into_edn_value(self) -> edn::Value {
+        match self {
+            ValueType::Ref => values::DB_TYPE_REF.clone(),
+            ValueType::Boolean => values::DB_TYPE_BOOLEAN.clone(),
+            ValueType::Instant => values::DB_TYPE_INSTANT.clone(),
+            ValueType::Long => values::DB_TYPE_LONG.clone(),
+            ValueType::Double => values::DB_TYPE_DOUBLE.clone(),
+            ValueType::String => values::DB_TYPE_STRING.clone(),
+            ValueType::Keyword => values::DB_TYPE_KEYWORD.clone(),
+            ValueType::Uuid => values::DB_TYPE_UUID.clone(),
+        }
+    }
+
+    pub fn is_numeric(&self) -> bool {
+        match self {
+            &ValueType::Long | &ValueType::Double => true,
+            _ => false
+        }
+    }
+}
+
+impl fmt::Display for ValueType {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "{}", match *self {
+            ValueType::Ref =>     ":db.type/ref",
+            ValueType::Boolean => ":db.type/boolean",
+            ValueType::Instant => ":db.type/instant",
+            ValueType::Long =>    ":db.type/long",
+            ValueType::Double =>  ":db.type/double",
+            ValueType::String =>  ":db.type/string",
+            ValueType::Keyword => ":db.type/keyword",
+            ValueType::Uuid =>    ":db.type/uuid",
+        })
+    }
+}
+
+/// `TypedValue` is the value type for programmatic use in transaction builders.
+impl TransactableValueMarker for TypedValue {}
+
+/// Represents a value that can be stored in a Mentat store.
+// TODO: expand to include :db.type/uri. https://github.com/mozilla/mentat/issues/201
+// TODO: JSON data type? https://github.com/mozilla/mentat/issues/31
+// TODO: BigInt? Bytes?
+#[derive(Clone, Debug, Eq, Hash, Ord, PartialOrd, PartialEq, Serialize, Deserialize)]
+pub enum TypedValue {
+    Ref(Entid),
+    Boolean(bool),
+    Long(i64),
+    Double(OrderedFloat<f64>),
+    Instant(DateTime<Utc>),               // Use `into()` to ensure truncation.
+    // TODO: &str throughout?
+    String(ValueRc<String>),
+    Keyword(ValueRc<Keyword>),
+    Uuid(Uuid),                        // It's only 128 bits, so this should be acceptable to clone.
+}
+
+impl From<KnownEntid> for TypedValue {
+    fn from(k: KnownEntid) -> TypedValue {
+        TypedValue::Ref(k.0)
+    }
+}
+
+impl TypedValue {
+    /// Returns true if the provided type is `Some` and matches this value's type, or if the
+    /// provided type is `None`.
+    #[inline]
+    pub fn is_congruent_with<T: Into<Option<ValueType>>>(&self, t: T) -> bool {
+        t.into().map_or(true, |x| self.matches_type(x))
+    }
+
+    #[inline]
+    pub fn matches_type(&self, t: ValueType) -> bool {
+        self.value_type() == t
+    }
+
+    pub fn value_type(&self) -> ValueType {
+        match self {
+            &TypedValue::Ref(_) => ValueType::Ref,
+            &TypedValue::Boolean(_) => ValueType::Boolean,
+            &TypedValue::Long(_) => ValueType::Long,
+            &TypedValue::Instant(_) => ValueType::Instant,
+            &TypedValue::Double(_) => ValueType::Double,
+            &TypedValue::String(_) => ValueType::String,
+            &TypedValue::Keyword(_) => ValueType::Keyword,
+            &TypedValue::Uuid(_) => ValueType::Uuid,
+        }
+    }
+
+    /// Construct a new `TypedValue::Keyword` instance by cloning the provided
+    /// values and wrapping them in a new `ValueRc`. This is expensive, so this might
+    /// be best limited to tests.
+    pub fn typed_ns_keyword<S: AsRef<str>, T: AsRef<str>>(ns: S, name: T) -> TypedValue {
+        Keyword::namespaced(ns.as_ref(), name.as_ref()).into()
+    }
+
+    /// Construct a new `TypedValue::String` instance by cloning the provided
+    /// value and wrapping it in a new `ValueRc`. This is expensive, so this might
+    /// be best limited to tests.
+    pub fn typed_string<S: AsRef<str>>(s: S) -> TypedValue {
+        s.as_ref().into()
+    }
+
+    pub fn current_instant() -> TypedValue {
+        Utc::now().into()
+    }
+
+    /// Construct a new `TypedValue::Instant` instance from the provided
+    /// microsecond timestamp.
+    pub fn instant(micros: i64) -> TypedValue {
+        DateTime::<Utc>::from_micros(micros).into()
+    }
+
+    pub fn into_known_entid(self) -> Option<KnownEntid> {
+        match self {
+            TypedValue::Ref(v) => Some(KnownEntid(v)),
+            _ => None,
+        }
+    }
+
+    pub fn into_entid(self) -> Option<Entid> {
+        match self {
+            TypedValue::Ref(v) => Some(v),
+            _ => None,
+        }
+    }
+
+    pub fn into_kw(self) -> Option<ValueRc<Keyword>> {
+        match self {
+            TypedValue::Keyword(v) => Some(v),
+            _ => None,
+        }
+    }
+
+    pub fn into_boolean(self) -> Option<bool> {
+        match self {
+            TypedValue::Boolean(v) => Some(v),
+            _ => None,
+        }
+    }
+
+    pub fn into_long(self) -> Option<i64> {
+        match self {
+            TypedValue::Long(v) => Some(v),
+            _ => None,
+        }
+    }
+
+    pub fn into_double(self) -> Option<f64> {
+        match self {
+            TypedValue::Double(v) => Some(v.into_inner()),
+            _ => None,
+        }
+    }
+
+    pub fn into_instant(self) -> Option<DateTime<Utc>> {
+        match self {
+            TypedValue::Instant(v) => Some(v),
+            _ => None,
+        }
+    }
+
+    pub fn into_timestamp(self) -> Option<i64> {
+        match self {
+            TypedValue::Instant(v) => Some(v.timestamp()),
+            _ => None,
+        }
+    }
+
+    pub fn into_string(self) -> Option<ValueRc<String>> {
+        match self {
+            TypedValue::String(v) => Some(v),
+            _ => None,
+        }
+    }
+
+    pub fn into_c_string(self) -> Option<*mut c_char> {
+        match self {
+            TypedValue::String(v) => {
+                // Get an independent copy of the string.
+                let s: String = v.cloned();
+
+                // Make a CString out of the new bytes.
+                let c: CString = CString::new(s).expect("String conversion failed!");
+
+                // Return a C-owned pointer.
+                Some(c.into_raw())
+            },
+            _ => None,
+        }
+    }
+
+    pub fn into_kw_c_string(self) -> Option<*mut c_char> {
+        match self {
+            TypedValue::Keyword(v) => {
+                // Get an independent copy of the string.
+                let s: String = v.to_string();
+
+                // Make a CString out of the new bytes.
+                let c: CString = CString::new(s).expect("String conversion failed!");
+
+                // Return a C-owned pointer.
+                Some(c.into_raw())
+            },
+            _ => None,
+        }
+    }
+
+    pub fn into_uuid_c_string(self) -> Option<*mut c_char> {
+        match self {
+            TypedValue::Uuid(v) => {
+                // Get an independent copy of the string.
+                let s: String = v.hyphenated().to_string();
+
+                // Make a CString out of the new bytes.
+                let c: CString = CString::new(s).expect("String conversion failed!");
+
+                // Return a C-owned pointer.
+                Some(c.into_raw())
+            },
+            _ => None,
+        }
+    }
+
+    pub fn into_uuid(self) -> Option<Uuid> {
+        match self {
+            TypedValue::Uuid(v) => Some(v),
+            _ => None,
+        }
+    }
+
+    pub fn into_uuid_string(self) -> Option<String> {
+        match self {
+            TypedValue::Uuid(v) => Some(v.hyphenated().to_string()),
+            _ => None,
+        }
+    }
+}
+
+// We don't do From<i64> or From<Entid> 'cos it's ambiguous.
+
+impl From<bool> for TypedValue {
+    fn from(value: bool) -> TypedValue {
+        TypedValue::Boolean(value)
+    }
+}
+
+/// Truncate the provided `DateTime` to microsecond precision, and return the corresponding
+/// `TypedValue::Instant`.
+impl From<DateTime<Utc>> for TypedValue {
+    fn from(value: DateTime<Utc>) -> TypedValue {
+        TypedValue::Instant(value.microsecond_precision())
+    }
+}
+
+impl From<Uuid> for TypedValue {
+    fn from(value: Uuid) -> TypedValue {
+        TypedValue::Uuid(value)
+    }
+}
+
+impl<'a> From<&'a str> for TypedValue {
+    fn from(value: &'a str) -> TypedValue {
+        TypedValue::String(ValueRc::new(value.to_string()))
+    }
+}
+
+impl From<Arc<String>> for TypedValue {
+    fn from(value: Arc<String>) -> TypedValue {
+        TypedValue::String(ValueRc::from_arc(value))
+    }
+}
+
+impl From<Rc<String>> for TypedValue {
+    fn from(value: Rc<String>) -> TypedValue {
+        TypedValue::String(ValueRc::from_rc(value))
+    }
+}
+
+impl From<Box<String>> for TypedValue {
+    fn from(value: Box<String>) -> TypedValue {
+        TypedValue::String(ValueRc::new(*value))
+    }
+}
+
+impl From<String> for TypedValue {
+    fn from(value: String) -> TypedValue {
+        TypedValue::String(ValueRc::new(value))
+    }
+}
+
+impl From<Arc<Keyword>> for TypedValue {
+    fn from(value: Arc<Keyword>) -> TypedValue {
+        TypedValue::Keyword(ValueRc::from_arc(value))
+    }
+}
+
+impl From<Rc<Keyword>> for TypedValue {
+    fn from(value: Rc<Keyword>) -> TypedValue {
+        TypedValue::Keyword(ValueRc::from_rc(value))
+    }
+}
+
+impl From<Keyword> for TypedValue {
+    fn from(value: Keyword) -> TypedValue {
+        TypedValue::Keyword(ValueRc::new(value))
+    }
+}
+
+impl From<u32> for TypedValue {
+    fn from(value: u32) -> TypedValue {
+        TypedValue::Long(value as i64)
+    }
+}
+
+impl From<i32> for TypedValue {
+    fn from(value: i32) -> TypedValue {
+        TypedValue::Long(value as i64)
+    }
+}
+
+impl From<f64> for TypedValue {
+    fn from(value: f64) -> TypedValue {
+        TypedValue::Double(OrderedFloat(value))
+    }
+}
+
+trait MicrosecondPrecision {
+    /// Truncate the provided `DateTime` to microsecond precision.
+    fn microsecond_precision(self) -> Self;
+}
+
+impl MicrosecondPrecision for DateTime<Utc> {
+    fn microsecond_precision(self) -> DateTime<Utc> {
+        let nanoseconds = self.nanosecond();
+        if nanoseconds % 1000 == 0 {
+            return self;
+        }
+        let microseconds = nanoseconds / 1000;
+        let truncated = microseconds * 1000;
+        self.with_nanosecond(truncated).expect("valid timestamp")
+    }
+}
+
+
+/// The values bound in a query specification can be:
+///
+/// * Vecs of structured values, for multi-valued component attributes or nested expressions.
+/// * Single structured values, for single-valued component attributes or nested expressions.
+/// * Single typed values, for simple attributes.
+///
+/// The `Binding` enum defines these three options.
+///
+/// Datomic also supports structured inputs; at present Mentat does not, but this type
+/// would also serve that purpose.
+///
+/// Note that maps are not ordered, and so `Binding` is neither `Ord` nor `PartialOrd`.
+#[derive(Clone, Debug, Eq, PartialEq)]
+pub enum Binding {
+    Scalar(TypedValue),
+    Vec(ValueRc<Vec<Binding>>),
+    Map(ValueRc<StructuredMap>),
+}
+
+impl<T> From<T> for Binding where T: Into<TypedValue> {
+    fn from(value: T) -> Self {
+        Binding::Scalar(value.into())
+    }
+}
+
+impl From<StructuredMap> for Binding {
+    fn from(value: StructuredMap) -> Self {
+        Binding::Map(ValueRc::new(value))
+    }
+}
+
+impl From<Vec<Binding>> for Binding {
+    fn from(value: Vec<Binding>) -> Self {
+        Binding::Vec(ValueRc::new(value))
+    }
+}
+
+impl Binding {
+    pub fn into_scalar(self) -> Option<TypedValue> {
+        match self {
+            Binding::Scalar(v) => Some(v),
+            _ => None,
+        }
+    }
+
+    pub fn into_vec(self) -> Option<ValueRc<Vec<Binding>>> {
+        match self {
+            Binding::Vec(v) => Some(v),
+            _ => None,
+        }
+    }
+
+    pub fn into_map(self) -> Option<ValueRc<StructuredMap>> {
+        match self {
+            Binding::Map(v) => Some(v),
+            _ => None,
+        }
+    }
+
+    pub fn as_scalar(&self) -> Option<&TypedValue> {
+        match self {
+            &Binding::Scalar(ref v) => Some(v),
+            _ => None,
+        }
+    }
+
+    pub fn as_vec(&self) -> Option<&Vec<Binding>> {
+        match self {
+            &Binding::Vec(ref v) => Some(v),
+            _ => None,
+        }
+    }
+
+    pub fn as_map(&self) -> Option<&StructuredMap> {
+        match self {
+            &Binding::Map(ref v) => Some(v),
+            _ => None,
+        }
+    }
+}
+
+/// A pull expression expands a binding into a structure. The returned structure
+/// associates attributes named in the input or retrieved from the store with values.
+/// This association is a `StructuredMap`.
+///
+/// Note that 'attributes' in Datomic's case can mean:
+/// - Reversed attribute keywords (:artist/_country).
+/// - An alias using `:as` (:artist/name :as "Band name").
+///
+/// We entirely support the former, and partially support the latter -- you can alias
+/// using a different keyword only.
+#[derive(Clone, Debug, Default, Eq, PartialEq)]
+pub struct StructuredMap(pub IndexMap<ValueRc<Keyword>, Binding>);
+
+impl Deref for StructuredMap {
+    type Target = IndexMap<ValueRc<Keyword>, Binding>;
+
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+
+impl StructuredMap {
+    pub fn insert<N, B>(&mut self, name: N, value: B) where N: Into<ValueRc<Keyword>>, B: Into<Binding> {
+        self.0.insert(name.into(), value.into());
+    }
+}
+
+impl From<IndexMap<ValueRc<Keyword>, Binding>> for StructuredMap {
+    fn from(src: IndexMap<ValueRc<Keyword>, Binding>) -> Self {
+        StructuredMap(src)
+    }
+}
+
+// Mostly for testing.
+impl<T> From<Vec<(Keyword, T)>> for StructuredMap where T: Into<Binding> {
+    fn from(value: Vec<(Keyword, T)>) -> Self {
+        let mut sm = StructuredMap::default();
+        for (k, v) in value.into_iter() {
+            sm.insert(k, v);
+        }
+        sm
+    }
+}
+
+impl Binding {
+    /// Returns true if the provided type is `Some` and matches this value's type, or if the
+    /// provided type is `None`.
+    #[inline]
+    pub fn is_congruent_with<T: Into<Option<ValueType>>>(&self, t: T) -> bool {
+        t.into().map_or(true, |x| self.matches_type(x))
+    }
+
+    #[inline]
+    pub fn matches_type(&self, t: ValueType) -> bool {
+        self.value_type() == Some(t)
+    }
+
+    pub fn value_type(&self) -> Option<ValueType> {
+        match self {
+            &Binding::Scalar(ref v) => Some(v.value_type()),
+
+            &Binding::Map(_) => None,
+            &Binding::Vec(_) => None,
+        }
+    }
+}
+
+/// Return the current time as a UTC `DateTime` instance with microsecond precision.
+pub fn now() -> DateTime<Utc> {
+    Utc::now().microsecond_precision()
+}
+
+impl Binding {
+    pub fn into_known_entid(self) -> Option<KnownEntid> {
+        match self {
+            Binding::Scalar(TypedValue::Ref(v)) => Some(KnownEntid(v)),
+            _ => None,
+        }
+    }
+
+    pub fn into_entid(self) -> Option<Entid> {
+        match self {
+            Binding::Scalar(TypedValue::Ref(v)) => Some(v),
+            _ => None,
+        }
+    }
+
+    pub fn into_kw(self) -> Option<ValueRc<Keyword>> {
+        match self {
+            Binding::Scalar(TypedValue::Keyword(v)) => Some(v),
+            _ => None,
+        }
+    }
+
+    pub fn into_boolean(self) -> Option<bool> {
+        match self {
+            Binding::Scalar(TypedValue::Boolean(v)) => Some(v),
+            _ => None,
+        }
+    }
+
+    pub fn into_long(self) -> Option<i64> {
+        match self {
+            Binding::Scalar(TypedValue::Long(v)) => Some(v),
+            _ => None,
+        }
+    }
+
+    pub fn into_double(self) -> Option<f64> {
+        match self {
+            Binding::Scalar(TypedValue::Double(v)) => Some(v.into_inner()),
+            _ => None,
+        }
+    }
+
+    pub fn into_instant(self) -> Option<DateTime<Utc>> {
+        match self {
+            Binding::Scalar(TypedValue::Instant(v)) => Some(v),
+            _ => None,
+        }
+    }
+
+    pub fn into_timestamp(self) -> Option<i64> {
+        match self {
+            Binding::Scalar(TypedValue::Instant(v)) => Some(v.timestamp()),
+            _ => None,
+        }
+    }
+
+    pub fn into_string(self) -> Option<ValueRc<String>> {
+        match self {
+            Binding::Scalar(TypedValue::String(v)) => Some(v),
+            _ => None,
+        }
+    }
+
+    pub fn into_uuid(self) -> Option<Uuid> {
+        match self {
+            Binding::Scalar(TypedValue::Uuid(v)) => Some(v),
+            _ => None,
+        }
+    }
+
+    pub fn into_uuid_string(self) -> Option<String> {
+        match self {
+            Binding::Scalar(TypedValue::Uuid(v)) => Some(v.hyphenated().to_string()),
+            _ => None,
+        }
+    }
+
+    pub fn into_c_string(self) -> Option<*mut c_char> {
+        match self {
+            Binding::Scalar(v) => v.into_c_string(),
+            _ => None,
+        }
+    }
+
+    pub fn into_kw_c_string(self) -> Option<*mut c_char> {
+        match self {
+            Binding::Scalar(v) => v.into_kw_c_string(),
+            _ => None,
+        }
+    }
+
+    pub fn into_uuid_c_string(self) -> Option<*mut c_char> {
+        match self {
+            Binding::Scalar(v) => v.into_uuid_c_string(),
+            _ => None,
+        }
+    }
+
+    pub fn as_entid(&self) -> Option<&Entid> {
+        match self {
+            &Binding::Scalar(TypedValue::Ref(ref v)) => Some(v),
+            _ => None,
+        }
+    }
+
+    pub fn as_kw(&self) -> Option<&ValueRc<Keyword>> {
+        match self {
+            &Binding::Scalar(TypedValue::Keyword(ref v)) => Some(v),
+            _ => None,
+        }
+    }
+
+    pub fn as_boolean(&self) -> Option<&bool> {
+        match self {
+            &Binding::Scalar(TypedValue::Boolean(ref v)) => Some(v),
+            _ => None,
+        }
+    }
+
+    pub fn as_long(&self) -> Option<&i64> {
+        match self {
+            &Binding::Scalar(TypedValue::Long(ref v)) => Some(v),
+            _ => None,
+        }
+    }
+
+    pub fn as_double(&self) -> Option<&f64> {
+        match self {
+            &Binding::Scalar(TypedValue::Double(ref v)) => Some(&v.0),
+            _ => None,
+        }
+    }
+
+    pub fn as_instant(&self) -> Option<&DateTime<Utc>> {
+        match self {
+            &Binding::Scalar(TypedValue::Instant(ref v)) => Some(v),
+            _ => None,
+        }
+    }
+
+    pub fn as_string(&self) -> Option<&ValueRc<String>> {
+        match self {
+            &Binding::Scalar(TypedValue::String(ref v)) => Some(v),
+            _ => None,
+        }
+    }
+
+    pub fn as_uuid(&self) -> Option<&Uuid> {
+        match self {
+            &Binding::Scalar(TypedValue::Uuid(ref v)) => Some(v),
+            _ => None,
+        }
+    }
+}
+
+#[test]
+fn test_typed_value() {
+    assert!(TypedValue::Boolean(false).is_congruent_with(None));
+    assert!(TypedValue::Boolean(false).is_congruent_with(ValueType::Boolean));
+    assert!(!TypedValue::typed_string("foo").is_congruent_with(ValueType::Boolean));
+    assert!(TypedValue::typed_string("foo").is_congruent_with(ValueType::String));
+    assert!(TypedValue::typed_string("foo").is_congruent_with(None));
+}

core/Cargo.toml

@@ -8,11 +8,8 @@ chrono = { version = "0.4", features = ["serde"] }
 enum-set = "0.0.7"
 failure = "0.1.1"
 indexmap = "1"
-lazy_static = "0.2"
 ordered-float = { version = "0.5", features = ["serde"] }
 uuid = { version = "0.5", features = ["v4", "serde"] }
-serde = { version = "1.0", features = ["rc"] }
-serde_derive = "1.0"
 
 [dependencies.core_traits]
 path = "../core-traits"

core/src/cache.rs

@@ -16,11 +16,11 @@ use std::collections::{
 
 use core_traits::{
     Entid,
+    TypedValue,
 };
 
 use ::{
     Schema,
-    TypedValue,
 };
 
 pub trait CachedAttributes {

core/src/lib.rs

@@ -14,24 +14,18 @@ extern crate failure;
 extern crate indexmap;
 extern crate ordered_float;
 extern crate uuid;
-extern crate serde;
 
 extern crate core_traits;
 
-#[macro_use]
-extern crate lazy_static;
-
-#[macro_use]
-extern crate serde_derive;
-
 extern crate edn;
 
 use core_traits::{
     Entid,
     KnownEntid,
+    values,
+    ValueType,
 };
 
-pub mod values;
 mod cache;
 
 use std::collections::{
@@ -76,12 +70,7 @@ pub use tx_report::{
 };
 
 pub use types::{
-    Binding,
-    StructuredMap,
-    TypedValue,
-    ValueType,
     ValueTypeTag,
-    now,
 };
 
 pub use value_type_set::{
@@ -106,7 +95,9 @@ pub enum AttributeBitFlags {
 }
 
 pub mod attribute {
-    use TypedValue;
+    use core_traits::{
+        TypedValue,
+    };
 
     #[derive(Clone, Copy, Debug, Eq, Hash, Ord, PartialOrd, PartialEq)]
     pub enum Unique {
@@ -423,6 +414,10 @@ mod test {
 
     use std::str::FromStr;
 
+    use core_traits::{
+        TypedValue,
+    };
+
     fn associate_ident(schema: &mut Schema, i: Keyword, e: Entid) {
         schema.entid_map.insert(e, i.clone());
         schema.ident_map.insert(i, e);

core/src/sql_types.rs

@@ -12,8 +12,11 @@ use std::collections::{
     BTreeSet,
 };
 
-use types::{
+use core_traits::{
     ValueType,
+};
+
+use types::{
     ValueTypeTag,
 };
 
@@ -70,7 +73,10 @@ impl SQLValueType for ValueType {
     /// example, `1` is how we encode `true`.
     ///
     /// ```
-    /// use mentat_core::{ValueType, SQLValueType};
+    /// extern crate core_traits;
+    /// extern crate mentat_core;
+    /// use core_traits::ValueType;
+    /// use mentat_core::SQLValueType;
     /// assert!(!ValueType::Instant.accommodates_integer(1493399581314));
     /// assert!(!ValueType::Instant.accommodates_integer(1493399581314000));
     /// assert!(ValueType::Boolean.accommodates_integer(1));

core/src/types.rs

@@ -8,814 +8,4 @@
 // CONDITIONS OF ANY KIND, either express or implied. See the License for the
 // specific language governing permissions and limitations under the License.
 
-use ::std::convert::{
-    AsRef,
-};
-
-use ::std::ffi::{
-    CString,
-};
-
-use ::std::ops::{
-    Deref,
-};
-
-use ::std::os::raw::c_char;
-
-use ::std::rc::{
-    Rc,
-};
-
-use ::std::sync::{
-    Arc,
-};
-
-use std::fmt;
-use ::enum_set::EnumSet;
-
-use ::ordered_float::OrderedFloat;
-
-use ::uuid::Uuid;
-
-use ::chrono::{
-    DateTime,
-    Timelike,       // For truncation.
-};
-
-use ::indexmap::{
-    IndexMap,
-};
-
-use ::edn::{
-    self,
-    Cloned,
-    FromMicros,
-    FromRc,
-    Keyword,
-    Utc,
-    ValueRc,
-};
-
-use ::edn::entities::{
-    TransactableValueMarker,
-};
-
-use values;
-
-use core_traits::{
-    Entid,
-    KnownEntid,
-};
-
-impl From<KnownEntid> for TypedValue {
-    fn from(k: KnownEntid) -> TypedValue {
-        TypedValue::Ref(k.0)
-    }
-}
-
-/// The attribute of each Mentat assertion has a :db/valueType constraining the value to a
-/// particular set.  Mentat recognizes the following :db/valueType values.
-#[derive(Clone, Copy, Debug, Eq, Hash, Ord, PartialOrd, PartialEq)]
-#[repr(u32)]
-pub enum ValueType {
-    Ref,
-    Boolean,
-    Instant,
-    Long,
-    Double,
-    String,
-    Keyword,
-    Uuid,
-}
-
 pub type ValueTypeTag = i32;
-
-impl ValueType {
-    pub fn all_enums() -> EnumSet<ValueType> {
-        // TODO: lazy_static.
-        let mut s = EnumSet::new();
-        s.insert(ValueType::Ref);
-        s.insert(ValueType::Boolean);
-        s.insert(ValueType::Instant);
-        s.insert(ValueType::Long);
-        s.insert(ValueType::Double);
-        s.insert(ValueType::String);
-        s.insert(ValueType::Keyword);
-        s.insert(ValueType::Uuid);
-        s
-    }
-}
-
-
-impl ::enum_set::CLike for ValueType {
-    fn to_u32(&self) -> u32 {
-        *self as u32
-    }
-
-    unsafe fn from_u32(v: u32) -> ValueType {
-        ::std::mem::transmute(v)
-    }
-}
-
-impl ValueType {
-    pub fn into_keyword(self) -> Keyword {
-        Keyword::namespaced("db.type", match self {
-            ValueType::Ref => "ref",
-            ValueType::Boolean => "boolean",
-            ValueType::Instant => "instant",
-            ValueType::Long => "long",
-            ValueType::Double => "double",
-            ValueType::String => "string",
-            ValueType::Keyword => "keyword",
-            ValueType::Uuid => "uuid",
-        })
-    }
-
-    pub fn from_keyword(keyword: &Keyword) -> Option<Self> {
-        if keyword.namespace() != Some("db.type") {
-            return None;
-        }
-
-        return match keyword.name() {
-            "ref" => Some(ValueType::Ref),
-            "boolean" => Some(ValueType::Boolean),
-            "instant" => Some(ValueType::Instant),
-            "long" => Some(ValueType::Long),
-            "double" => Some(ValueType::Double),
-            "string" => Some(ValueType::String),
-            "keyword" => Some(ValueType::Keyword),
-            "uuid" => Some(ValueType::Uuid),
-            _ => None,
-        }
-    }
-
-    pub fn into_typed_value(self) -> TypedValue {
-        TypedValue::typed_ns_keyword("db.type", match self {
-            ValueType::Ref => "ref",
-            ValueType::Boolean => "boolean",
-            ValueType::Instant => "instant",
-            ValueType::Long => "long",
-            ValueType::Double => "double",
-            ValueType::String => "string",
-            ValueType::Keyword => "keyword",
-            ValueType::Uuid => "uuid",
-        })
-    }
-
-    pub fn into_edn_value(self) -> edn::Value {
-        match self {
-            ValueType::Ref => values::DB_TYPE_REF.clone(),
-            ValueType::Boolean => values::DB_TYPE_BOOLEAN.clone(),
-            ValueType::Instant => values::DB_TYPE_INSTANT.clone(),
-            ValueType::Long => values::DB_TYPE_LONG.clone(),
-            ValueType::Double => values::DB_TYPE_DOUBLE.clone(),
-            ValueType::String => values::DB_TYPE_STRING.clone(),
-            ValueType::Keyword => values::DB_TYPE_KEYWORD.clone(),
-            ValueType::Uuid => values::DB_TYPE_UUID.clone(),
-        }
-    }
-
-    pub fn is_numeric(&self) -> bool {
-        match self {
-            &ValueType::Long | &ValueType::Double => true,
-            _ => false
-        }
-    }
-}
-
-impl fmt::Display for ValueType {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        write!(f, "{}", match *self {
-            ValueType::Ref =>     ":db.type/ref",
-            ValueType::Boolean => ":db.type/boolean",
-            ValueType::Instant => ":db.type/instant",
-            ValueType::Long =>    ":db.type/long",
-            ValueType::Double =>  ":db.type/double",
-            ValueType::String =>  ":db.type/string",
-            ValueType::Keyword => ":db.type/keyword",
-            ValueType::Uuid =>    ":db.type/uuid",
-        })
-    }
-}
-
-/// Represents a value that can be stored in a Mentat store.
-// TODO: expand to include :db.type/uri. https://github.com/mozilla/mentat/issues/201
-// TODO: JSON data type? https://github.com/mozilla/mentat/issues/31
-// TODO: BigInt? Bytes?
-#[derive(Clone, Debug, Eq, Hash, Ord, PartialOrd, PartialEq, Serialize, Deserialize)]
-pub enum TypedValue {
-    Ref(Entid),
-    Boolean(bool),
-    Long(i64),
-    Double(OrderedFloat<f64>),
-    Instant(DateTime<Utc>),               // Use `into()` to ensure truncation.
-    // TODO: &str throughout?
-    String(ValueRc<String>),
-    Keyword(ValueRc<Keyword>),
-    Uuid(Uuid),                        // It's only 128 bits, so this should be acceptable to clone.
-}
-
-/// `TypedValue` is the value type for programmatic use in transaction builders.
-impl TransactableValueMarker for TypedValue {}
-
-/// The values bound in a query specification can be:
-///
-/// * Vecs of structured values, for multi-valued component attributes or nested expressions.
-/// * Single structured values, for single-valued component attributes or nested expressions.
-/// * Single typed values, for simple attributes.
-///
-/// The `Binding` enum defines these three options.
-///
-/// Datomic also supports structured inputs; at present Mentat does not, but this type
-/// would also serve that purpose.
-///
-/// Note that maps are not ordered, and so `Binding` is neither `Ord` nor `PartialOrd`.
-#[derive(Clone, Debug, Eq, PartialEq)]
-pub enum Binding {
-    Scalar(TypedValue),
-    Vec(ValueRc<Vec<Binding>>),
-    Map(ValueRc<StructuredMap>),
-}
-
-impl<T> From<T> for Binding where T: Into<TypedValue> {
-    fn from(value: T) -> Self {
-        Binding::Scalar(value.into())
-    }
-}
-
-impl From<StructuredMap> for Binding {
-    fn from(value: StructuredMap) -> Self {
-        Binding::Map(ValueRc::new(value))
-    }
-}
-
-impl From<Vec<Binding>> for Binding {
-    fn from(value: Vec<Binding>) -> Self {
-        Binding::Vec(ValueRc::new(value))
-    }
-}
-
-impl Binding {
-    pub fn into_scalar(self) -> Option<TypedValue> {
-        match self {
-            Binding::Scalar(v) => Some(v),
-            _ => None,
-        }
-    }
-
-    pub fn into_vec(self) -> Option<ValueRc<Vec<Binding>>> {
-        match self {
-            Binding::Vec(v) => Some(v),
-            _ => None,
-        }
-    }
-
-    pub fn into_map(self) -> Option<ValueRc<StructuredMap>> {
-        match self {
-            Binding::Map(v) => Some(v),
-            _ => None,
-        }
-    }
-
-    pub fn as_scalar(&self) -> Option<&TypedValue> {
-        match self {
-            &Binding::Scalar(ref v) => Some(v),
-            _ => None,
-        }
-    }
-
-    pub fn as_vec(&self) -> Option<&Vec<Binding>> {
-        match self {
-            &Binding::Vec(ref v) => Some(v),
-            _ => None,
-        }
-    }
-
-    pub fn as_map(&self) -> Option<&StructuredMap> {
-        match self {
-            &Binding::Map(ref v) => Some(v),
-            _ => None,
-        }
-    }
-}
-
-/// A pull expression expands a binding into a structure. The returned structure
-/// associates attributes named in the input or retrieved from the store with values.
-/// This association is a `StructuredMap`.
-///
-/// Note that 'attributes' in Datomic's case can mean:
-/// - Reversed attribute keywords (:artist/_country).
-/// - An alias using `:as` (:artist/name :as "Band name").
-///
-/// We entirely support the former, and partially support the latter -- you can alias
-/// using a different keyword only.
-#[derive(Clone, Debug, Default, Eq, PartialEq)]
-pub struct StructuredMap(pub IndexMap<ValueRc<Keyword>, Binding>);
-
-impl Deref for StructuredMap {
-    type Target = IndexMap<ValueRc<Keyword>, Binding>;
-
-    fn deref(&self) -> &Self::Target {
-        &self.0
-    }
-}
-
-impl StructuredMap {
-    pub fn insert<N, B>(&mut self, name: N, value: B) where N: Into<ValueRc<Keyword>>, B: Into<Binding> {
-        self.0.insert(name.into(), value.into());
-    }
-}
-
-impl From<IndexMap<ValueRc<Keyword>, Binding>> for StructuredMap {
-    fn from(src: IndexMap<ValueRc<Keyword>, Binding>) -> Self {
-        StructuredMap(src)
-    }
-}
-
-// Mostly for testing.
-impl<T> From<Vec<(Keyword, T)>> for StructuredMap where T: Into<Binding> {
-    fn from(value: Vec<(Keyword, T)>) -> Self {
-        let mut sm = StructuredMap::default();
-        for (k, v) in value.into_iter() {
-            sm.insert(k, v);
-        }
-        sm
-    }
-}
-
-impl Binding {
-    /// Returns true if the provided type is `Some` and matches this value's type, or if the
-    /// provided type is `None`.
-    #[inline]
-    pub fn is_congruent_with<T: Into<Option<ValueType>>>(&self, t: T) -> bool {
-        t.into().map_or(true, |x| self.matches_type(x))
-    }
-
-    #[inline]
-    pub fn matches_type(&self, t: ValueType) -> bool {
-        self.value_type() == Some(t)
-    }
-
-    pub fn value_type(&self) -> Option<ValueType> {
-        match self {
-            &Binding::Scalar(ref v) => Some(v.value_type()),
-
-            &Binding::Map(_) => None,
-            &Binding::Vec(_) => None,
-        }
-    }
-}
-
-
-impl TypedValue {
-    /// Returns true if the provided type is `Some` and matches this value's type, or if the
-    /// provided type is `None`.
-    #[inline]
-    pub fn is_congruent_with<T: Into<Option<ValueType>>>(&self, t: T) -> bool {
-        t.into().map_or(true, |x| self.matches_type(x))
-    }
-
-    #[inline]
-    pub fn matches_type(&self, t: ValueType) -> bool {
-        self.value_type() == t
-    }
-
-    pub fn value_type(&self) -> ValueType {
-        match self {
-            &TypedValue::Ref(_) => ValueType::Ref,
-            &TypedValue::Boolean(_) => ValueType::Boolean,
-            &TypedValue::Long(_) => ValueType::Long,
-            &TypedValue::Instant(_) => ValueType::Instant,
-            &TypedValue::Double(_) => ValueType::Double,
-            &TypedValue::String(_) => ValueType::String,
-            &TypedValue::Keyword(_) => ValueType::Keyword,
-            &TypedValue::Uuid(_) => ValueType::Uuid,
-        }
-    }
-
-    /// Construct a new `TypedValue::Keyword` instance by cloning the provided
-    /// values and wrapping them in a new `ValueRc`. This is expensive, so this might
-    /// be best limited to tests.
-    pub fn typed_ns_keyword<S: AsRef<str>, T: AsRef<str>>(ns: S, name: T) -> TypedValue {
-        Keyword::namespaced(ns.as_ref(), name.as_ref()).into()
-    }
-
-    /// Construct a new `TypedValue::String` instance by cloning the provided
-    /// value and wrapping it in a new `ValueRc`. This is expensive, so this might
-    /// be best limited to tests.
-    pub fn typed_string<S: AsRef<str>>(s: S) -> TypedValue {
-        s.as_ref().into()
-    }
-
-    pub fn current_instant() -> TypedValue {
-        Utc::now().into()
-    }
-
-    /// Construct a new `TypedValue::Instant` instance from the provided
-    /// microsecond timestamp.
-    pub fn instant(micros: i64) -> TypedValue {
-        DateTime::<Utc>::from_micros(micros).into()
-    }
-}
-
-trait MicrosecondPrecision {
-    /// Truncate the provided `DateTime` to microsecond precision.
-    fn microsecond_precision(self) -> Self;
-}
-
-impl MicrosecondPrecision for DateTime<Utc> {
-    fn microsecond_precision(self) -> DateTime<Utc> {
-        let nanoseconds = self.nanosecond();
-        if nanoseconds % 1000 == 0 {
-            return self;
-        }
-        let microseconds = nanoseconds / 1000;
-        let truncated = microseconds * 1000;
-        self.with_nanosecond(truncated).expect("valid timestamp")
-    }
-}
-
-/// Return the current time as a UTC `DateTime` instance with microsecond precision.
-pub fn now() -> DateTime<Utc> {
-    Utc::now().microsecond_precision()
-}
-
-// We don't do From<i64> or From<Entid> 'cos it's ambiguous.
-
-impl From<bool> for TypedValue {
-    fn from(value: bool) -> TypedValue {
-        TypedValue::Boolean(value)
-    }
-}
-
-/// Truncate the provided `DateTime` to microsecond precision, and return the corresponding
-/// `TypedValue::Instant`.
-impl From<DateTime<Utc>> for TypedValue {
-    fn from(value: DateTime<Utc>) -> TypedValue {
-        TypedValue::Instant(value.microsecond_precision())
-    }
-}
-
-impl From<Uuid> for TypedValue {
-    fn from(value: Uuid) -> TypedValue {
-        TypedValue::Uuid(value)
-    }
-}
-
-impl<'a> From<&'a str> for TypedValue {
-    fn from(value: &'a str) -> TypedValue {
-        TypedValue::String(ValueRc::new(value.to_string()))
-    }
-}
-
-impl From<Arc<String>> for TypedValue {
-    fn from(value: Arc<String>) -> TypedValue {
-        TypedValue::String(ValueRc::from_arc(value))
-    }
-}
-
-impl From<Rc<String>> for TypedValue {
-    fn from(value: Rc<String>) -> TypedValue {
-        TypedValue::String(ValueRc::from_rc(value))
-    }
-}
-
-impl From<Box<String>> for TypedValue {
-    fn from(value: Box<String>) -> TypedValue {
-        TypedValue::String(ValueRc::new(*value))
-    }
-}
-
-impl From<String> for TypedValue {
-    fn from(value: String) -> TypedValue {
-        TypedValue::String(ValueRc::new(value))
-    }
-}
-
-impl From<Arc<Keyword>> for TypedValue {
-    fn from(value: Arc<Keyword>) -> TypedValue {
-        TypedValue::Keyword(ValueRc::from_arc(value))
-    }
-}
-
-impl From<Rc<Keyword>> for TypedValue {
-    fn from(value: Rc<Keyword>) -> TypedValue {
-        TypedValue::Keyword(ValueRc::from_rc(value))
-    }
-}
-
-impl From<Keyword> for TypedValue {
-    fn from(value: Keyword) -> TypedValue {
-        TypedValue::Keyword(ValueRc::new(value))
-    }
-}
-
-impl From<u32> for TypedValue {
-    fn from(value: u32) -> TypedValue {
-        TypedValue::Long(value as i64)
-    }
-}
-
-impl From<i32> for TypedValue {
-    fn from(value: i32) -> TypedValue {
-        TypedValue::Long(value as i64)
-    }
-}
-
-impl From<f64> for TypedValue {
-    fn from(value: f64) -> TypedValue {
-        TypedValue::Double(OrderedFloat(value))
-    }
-}
-
-impl TypedValue {
-    pub fn into_known_entid(self) -> Option<KnownEntid> {
-        match self {
-            TypedValue::Ref(v) => Some(KnownEntid(v)),
-            _ => None,
-        }
-    }
-
-    pub fn into_entid(self) -> Option<Entid> {
-        match self {
-            TypedValue::Ref(v) => Some(v),
-            _ => None,
-        }
-    }
-
-    pub fn into_kw(self) -> Option<ValueRc<Keyword>> {
-        match self {
-            TypedValue::Keyword(v) => Some(v),
-            _ => None,
-        }
-    }
-
-    pub fn into_boolean(self) -> Option<bool> {
-        match self {
-            TypedValue::Boolean(v) => Some(v),
-            _ => None,
-        }
-    }
-
-    pub fn into_long(self) -> Option<i64> {
-        match self {
-            TypedValue::Long(v) => Some(v),
-            _ => None,
-        }
-    }
-
-    pub fn into_double(self) -> Option<f64> {
-        match self {
-            TypedValue::Double(v) => Some(v.into_inner()),
-            _ => None,
-        }
-    }
-
-    pub fn into_instant(self) -> Option<DateTime<Utc>> {
-        match self {
-            TypedValue::Instant(v) => Some(v),
-            _ => None,
-        }
-    }
-
-    pub fn into_timestamp(self) -> Option<i64> {
-        match self {
-            TypedValue::Instant(v) => Some(v.timestamp()),
-            _ => None,
-        }
-    }
-
-    pub fn into_string(self) -> Option<ValueRc<String>> {
-        match self {
-            TypedValue::String(v) => Some(v),
-            _ => None,
-        }
-    }
-
-    pub fn into_c_string(self) -> Option<*mut c_char> {
-        match self {
-            TypedValue::String(v) => {
-                // Get an independent copy of the string.
-                let s: String = v.cloned();
-
-                // Make a CString out of the new bytes.
-                let c: CString = CString::new(s).expect("String conversion failed!");
-
-                // Return a C-owned pointer.
-                Some(c.into_raw())
-            },
-            _ => None,
-        }
-    }
-
-    pub fn into_kw_c_string(self) -> Option<*mut c_char> {
-        match self {
-            TypedValue::Keyword(v) => {
-                // Get an independent copy of the string.
-                let s: String = v.to_string();
-
-                // Make a CString out of the new bytes.
-                let c: CString = CString::new(s).expect("String conversion failed!");
-
-                // Return a C-owned pointer.
-                Some(c.into_raw())
-            },
-            _ => None,
-        }
-    }
-
-    pub fn into_uuid_c_string(self) -> Option<*mut c_char> {
-        match self {
-            TypedValue::Uuid(v) => {
-                // Get an independent copy of the string.
-                let s: String = v.hyphenated().to_string();
-
-                // Make a CString out of the new bytes.
-                let c: CString = CString::new(s).expect("String conversion failed!");
-
-                // Return a C-owned pointer.
-                Some(c.into_raw())
-            },
-            _ => None,
-        }
-    }
-
-    pub fn into_uuid(self) -> Option<Uuid> {
-        match self {
-            TypedValue::Uuid(v) => Some(v),
-            _ => None,
-        }
-    }
-
-    pub fn into_uuid_string(self) -> Option<String> {
-        match self {
-            TypedValue::Uuid(v) => Some(v.hyphenated().to_string()),
-            _ => None,
-        }
-    }
-}
-
-impl Binding {
-    pub fn into_known_entid(self) -> Option<KnownEntid> {
-        match self {
-            Binding::Scalar(TypedValue::Ref(v)) => Some(KnownEntid(v)),
-            _ => None,
-        }
-    }
-
-    pub fn into_entid(self) -> Option<Entid> {
-        match self {
-            Binding::Scalar(TypedValue::Ref(v)) => Some(v),
-            _ => None,
-        }
-    }
-
-    pub fn into_kw(self) -> Option<ValueRc<Keyword>> {
-        match self {
-            Binding::Scalar(TypedValue::Keyword(v)) => Some(v),
-            _ => None,
-        }
-    }
-
-    pub fn into_boolean(self) -> Option<bool> {
-        match self {
-            Binding::Scalar(TypedValue::Boolean(v)) => Some(v),
-            _ => None,
-        }
-    }
-
-    pub fn into_long(self) -> Option<i64> {
-        match self {
-            Binding::Scalar(TypedValue::Long(v)) => Some(v),
-            _ => None,
-        }
-    }
-
-    pub fn into_double(self) -> Option<f64> {
-        match self {
-            Binding::Scalar(TypedValue::Double(v)) => Some(v.into_inner()),
-            _ => None,
-        }
-    }
-
-    pub fn into_instant(self) -> Option<DateTime<Utc>> {
-        match self {
-            Binding::Scalar(TypedValue::Instant(v)) => Some(v),
-            _ => None,
-        }
-    }
-
-    pub fn into_timestamp(self) -> Option<i64> {
-        match self {
-            Binding::Scalar(TypedValue::Instant(v)) => Some(v.timestamp()),
-            _ => None,
-        }
-    }
-
-    pub fn into_string(self) -> Option<ValueRc<String>> {
-        match self {
-            Binding::Scalar(TypedValue::String(v)) => Some(v),
-            _ => None,
-        }
-    }
-
-    pub fn into_uuid(self) -> Option<Uuid> {
-        match self {
-            Binding::Scalar(TypedValue::Uuid(v)) => Some(v),
-            _ => None,
-        }
-    }
-
-    pub fn into_uuid_string(self) -> Option<String> {
-        match self {
-            Binding::Scalar(TypedValue::Uuid(v)) => Some(v.hyphenated().to_string()),
-            _ => None,
-        }
-    }
-
-    pub fn into_c_string(self) -> Option<*mut c_char> {
-        match self {
-            Binding::Scalar(v) => v.into_c_string(),
-            _ => None,
-        }
-    }
-
-    pub fn into_kw_c_string(self) -> Option<*mut c_char> {
-        match self {
-            Binding::Scalar(v) => v.into_kw_c_string(),
-            _ => None,
-        }
-    }
-
-    pub fn into_uuid_c_string(self) -> Option<*mut c_char> {
-        match self {
-            Binding::Scalar(v) => v.into_uuid_c_string(),
-            _ => None,
-        }
-    }
-
-    pub fn as_entid(&self) -> Option<&Entid> {
-        match self {
-            &Binding::Scalar(TypedValue::Ref(ref v)) => Some(v),
-            _ => None,
-        }
-    }
-
-    pub fn as_kw(&self) -> Option<&ValueRc<Keyword>> {
-        match self {
-            &Binding::Scalar(TypedValue::Keyword(ref v)) => Some(v),
-            _ => None,
-        }
-    }
-
-    pub fn as_boolean(&self) -> Option<&bool> {
-        match self {
-            &Binding::Scalar(TypedValue::Boolean(ref v)) => Some(v),
-            _ => None,
-        }
-    }
-
-    pub fn as_long(&self) -> Option<&i64> {
-        match self {
-            &Binding::Scalar(TypedValue::Long(ref v)) => Some(v),
-            _ => None,
-        }
-    }
-
-    pub fn as_double(&self) -> Option<&f64> {
-        match self {
-            &Binding::Scalar(TypedValue::Double(ref v)) => Some(&v.0),
-            _ => None,
-        }
-    }
-
-    pub fn as_instant(&self) -> Option<&DateTime<Utc>> {
-        match self {
-            &Binding::Scalar(TypedValue::Instant(ref v)) => Some(v),
-            _ => None,
-        }
-    }
-
-    pub fn as_string(&self) -> Option<&ValueRc<String>> {
-        match self {
-            &Binding::Scalar(TypedValue::String(ref v)) => Some(v),
-            _ => None,
-        }
-    }
-
-    pub fn as_uuid(&self) -> Option<&Uuid> {
-        match self {
-            &Binding::Scalar(TypedValue::Uuid(ref v)) => Some(v),
-            _ => None,
-        }
-    }
-}
-
-#[test]
-fn test_typed_value() {
-    assert!(TypedValue::Boolean(false).is_congruent_with(None));
-    assert!(TypedValue::Boolean(false).is_congruent_with(ValueType::Boolean));
-    assert!(!TypedValue::typed_string("foo").is_congruent_with(ValueType::Boolean));
-    assert!(TypedValue::typed_string("foo").is_congruent_with(ValueType::String));
-    assert!(TypedValue::typed_string("foo").is_congruent_with(None));
-}

core/src/value_type_set.rs

@@ -12,7 +12,7 @@ use ::enum_set::{
     EnumSet,
 };
 
-use ::types::{
+use core_traits::{
     ValueType,
 };
 

db/src/bootstrap.rs

@@ -20,11 +20,15 @@ use edn::symbols;
 use entids;
 use db::TypedSQLValue;
 use edn::entities::Entity;
+
+use core_traits::{
+    TypedValue,
+    values,
+};
+
 use mentat_core::{
     IdentMap,
     Schema,
-    TypedValue,
-    values,
 };
 use schema::SchemaBuilding;
 use types::{Partition, PartitionMap};

db/src/cache.rs

@@ -79,15 +79,15 @@ use failure::{
 use rusqlite;
 
 use core_traits::{
+    Binding,
     Entid,
+    TypedValue,
 };
 
 use mentat_core::{
-    Binding,
     CachedAttributes,
     HasSchema,
     Schema,
-    TypedValue,
     UpdateableCache,
     ValueRc,
 };

db/src/db.rs

@@ -43,6 +43,8 @@ use entids;
 
 use core_traits::{
     Entid,
+    TypedValue,
+    ValueType,
 };
 
 use mentat_core::{
@@ -53,9 +55,7 @@ use mentat_core::{
     IdentMap,
     Schema,
     AttributeMap,
-    TypedValue,
     ToMicros,
-    ValueType,
     ValueRc,
 };
 

db/src/debug.rs

@@ -69,14 +69,14 @@ use errors::Result;
 
 use core_traits::{
     Entid,
+    TypedValue,
+    ValueType,
 };
 
 use mentat_core::{
     HasSchema,
     SQLValueType,
     TxReport,
-    TypedValue,
-    ValueType,
 };
 use edn::{
     InternSet,

db/src/errors.rs

@@ -30,9 +30,6 @@ use edn::entities::{
 use core_traits::{
     Entid,
     KnownEntid,
-};
-
-use types::{
     TypedValue,
     ValueType,
 };

db/src/internal_types.rs

@@ -21,6 +21,8 @@ use std::collections::{
 use core_traits::{
     Entid,
     KnownEntid,
+    TypedValue,
+    ValueType,
 };
 
 use mentat_core::util::Either;
@@ -53,8 +55,6 @@ use types::{
     AVPair,
     Schema,
     TransactableValue,
-    TypedValue,
-    ValueType,
 };
 
 impl TransactableValue for ValueAndSpan {

db/src/metadata.rs

@@ -41,14 +41,14 @@ use errors::{
 
 use core_traits::{
     Entid,
+    TypedValue,
+    ValueType,
 };
 
 use mentat_core::{
     attribute,
     Schema,
     AttributeMap,
-    TypedValue,
-    ValueType,
 };
 
 use schema::{

db/src/schema.rs

@@ -21,6 +21,8 @@ use edn::symbols;
 use core_traits::{
     Entid,
     KnownEntid,
+    TypedValue,
+    ValueType,
 };
 
 use mentat_core::{
@@ -31,8 +33,6 @@ use mentat_core::{
     IdentMap,
     Schema,
     AttributeMap,
-    TypedValue,
-    ValueType,
 };
 use metadata;
 use metadata::{

db/src/timelines.rs

@@ -20,11 +20,11 @@ use errors::{
 use core_traits::{
     Entid,
     KnownEntid,
+    TypedValue,
 };
 
 use mentat_core::{
     Schema,
-    TypedValue,
 };
 
 use edn::{

db/src/tx.rs

@@ -92,6 +92,9 @@ use mentat_core::util::Either;
 use core_traits::{
     Entid,
     KnownEntid,
+    TypedValue,
+    ValueType,
+    now,
 };
 
 use mentat_core::{
@@ -100,7 +103,6 @@ use mentat_core::{
     TxReport,
     Utc,
     attribute,
-    now,
 };
 
 use edn::entities as entmod;
@@ -122,8 +124,6 @@ use types::{
     Attribute,
     PartitionMap,
     TransactableValue,
-    TypedValue,
-    ValueType,
 };
 use upsert_resolution::{
     FinalPopulations,

db/src/tx_checking.rs

@@ -15,9 +15,6 @@ use std::collections::{
 
 use core_traits::{
     Entid,
-};
-
-use mentat_core::{
     TypedValue,
     ValueType,
 };

db/src/tx_observer.rs

@@ -28,11 +28,11 @@ use indexmap::{
 
 use core_traits::{
     Entid,
+    TypedValue,
 };
 
 use mentat_core::{
     Schema,
-    TypedValue,
 };
 
 use edn::entities::{

db/src/types.rs

@@ -28,6 +28,8 @@ extern crate mentat_core;
 
 use core_traits::{
     Entid,
+    TypedValue,
+    ValueType,
 };
 
 pub use self::mentat_core::{
@@ -35,9 +37,7 @@ pub use self::mentat_core::{
     AttributeBitFlags,
     DateTime,
     Schema,
-    TypedValue,
     Utc,
-    ValueType,
 };
 
 use edn::entities::{

db/src/upsert_resolution.rs

@@ -42,13 +42,13 @@ use mentat_core::util::Either::*;
 
 use core_traits::{
     Entid,
+    TypedValue,
 };
 
 use mentat_core::{
     attribute,
     Attribute,
     Schema,
-    TypedValue,
 };
 use edn::entities::OpType;
 use schema::SchemaBuilding;

db/src/watcher.rs

@@ -19,11 +19,11 @@
 
 use core_traits::{
     Entid,
+    TypedValue,
 };
 
 use mentat_core::{
     Schema,
-    TypedValue,
 };
 
 use edn::entities::{

db/tests/value_tests.rs

@@ -9,7 +9,7 @@
 // specific language governing permissions and limitations under the License.
 
 extern crate edn;
-extern crate mentat_core;
+extern crate core_traits;
 extern crate mentat_db;
 extern crate ordered_float;
 extern crate rusqlite;
@@ -18,7 +18,10 @@ use ordered_float::OrderedFloat;
 
 use edn::symbols;
 
-use mentat_core::{TypedValue, ValueType};
+use core_traits::{
+    TypedValue,
+    ValueType,
+};
 use mentat_db::db::TypedSQLValue;
 
 // It's not possible to test to_sql_value_pair since rusqlite::ToSqlOutput doesn't implement

query-algebrizer/src/clauses/convert.rs

@@ -8,12 +8,15 @@
 // CONDITIONS OF ANY KIND, either express or implied. See the License for the
 // specific language governing permissions and limitations under the License.
 
+use core_traits::{
+    ValueType,
+    TypedValue,
+};
+
 use mentat_core::{
     HasSchema,
     Schema,
     SQLValueType,
-    TypedValue,
-    ValueType,
     ValueTypeSet,
 };
 

query-algebrizer/src/clauses/fulltext.rs

@@ -8,10 +8,13 @@
 // CONDITIONS OF ANY KIND, either express or implied. See the License for the
 // specific language governing permissions and limitations under the License.
 
+use core_traits::{
+    ValueType,
+    TypedValue,
+};
+
 use mentat_core::{
     HasSchema,
-    TypedValue,
-    ValueType,
 };
 
 use mentat_core::util::Either;
@@ -261,10 +264,13 @@ impl ConjoiningClauses {
 mod testing {
     use super::*;
 
+    use core_traits::{
+        ValueType,
+    };
+
     use mentat_core::{
         Attribute,
         Schema,
-        ValueType,
     };
 
     use mentat_query::{

query-algebrizer/src/clauses/ground.rs

@@ -8,10 +8,13 @@
 // CONDITIONS OF ANY KIND, either express or implied. See the License for the
 // specific language governing permissions and limitations under the License.
 
+use core_traits::{
+    ValueType,
+    TypedValue,
+};
+
 use mentat_core::{
     Schema,
-    TypedValue,
-    ValueType,
     ValueTypeSet,
 };
 
@@ -321,9 +324,12 @@ impl ConjoiningClauses {
 mod testing {
     use super::*;
 
+    use core_traits::{
+        ValueType,
+    };
+
     use mentat_core::{
         Attribute,
-        ValueType,
     };
 
     use mentat_query::{

query-algebrizer/src/clauses/inputs.rs

@@ -10,9 +10,9 @@
 
 use std::collections::BTreeMap;
 
-use mentat_core::{
-    TypedValue,
+use core_traits::{
     ValueType,
+    TypedValue,
 };
 
 use mentat_query::{

query-algebrizer/src/clauses/mod.rs

@@ -28,6 +28,8 @@ use std::fmt::{
 use core_traits::{
     Entid,
     KnownEntid,
+    ValueType,
+    TypedValue,
 };
 
 use mentat_core::{
@@ -35,8 +37,6 @@ use mentat_core::{
     Cloned,
     HasSchema,
     Schema,
-    TypedValue,
-    ValueType,
     ValueTypeSet,
 };
 

query-algebrizer/src/clauses/not.rs

@@ -90,11 +90,14 @@ mod testing {
 
     use super::*;
 
+    use core_traits::{
+        TypedValue,
+        ValueType,
+    };
+
     use mentat_core::{
         Attribute,
         Schema,
-        TypedValue,
-        ValueType,
         ValueTypeSet,
     };
 

query-algebrizer/src/clauses/or.rs

@@ -753,11 +753,14 @@ fn union_types(into: &mut BTreeMap<Variable, ValueTypeSet>,
 mod testing {
     use super::*;
 
+    use core_traits::{
+        ValueType,
+        TypedValue,
+    };
+
     use mentat_core::{
         Attribute,
         Schema,
-        TypedValue,
-        ValueType,
     };
 
     use mentat_query::{

query-algebrizer/src/clauses/pattern.rs

@@ -10,13 +10,13 @@
 
 use core_traits::{
     Entid,
+    ValueType,
+    TypedValue,
 };
 
 use mentat_core::{
     Cloned,
     HasSchema,
-    TypedValue,
-    ValueType,
     ValueTypeSet,
 };
 

query-algebrizer/src/clauses/predicate.rs

@@ -8,9 +8,12 @@
 // CONDITIONS OF ANY KIND, either express or implied. See the License for the
 // specific language governing permissions and limitations under the License.
 
+use core_traits::{
+    ValueType,
+};
+
 use mentat_core::{
     Schema,
-    ValueType,
     ValueTypeSet,
 };
 
@@ -188,11 +191,13 @@ mod testing {
     use super::*;
 
     use mentat_core::attribute::Unique;
-    use mentat_core::{
-        Attribute,
+    use core_traits::{
         TypedValue,
         ValueType,
     };
+    use mentat_core::{
+        Attribute,
+    };
 
     use mentat_query::{
         FnArg,

query-algebrizer/src/clauses/resolve.rs

@@ -8,11 +8,14 @@
 // CONDITIONS OF ANY KIND, either express or implied. See the License for the
 // specific language governing permissions and limitations under the License.
 
+use core_traits::{
+    ValueType,
+    TypedValue,
+};
+
 use mentat_core::{
     HasSchema,
     Schema,
-    TypedValue,
-    ValueType,
 };
 
 use mentat_query::{

query-algebrizer/src/clauses/tx_log_api.rs

@@ -8,7 +8,7 @@
 // CONDITIONS OF ANY KIND, either express or implied. See the License for the
 // specific language governing permissions and limitations under the License.
 
-use mentat_core::{
+use core_traits::{
     ValueType,
 };
 
@@ -248,12 +248,15 @@ impl ConjoiningClauses {
 mod testing {
     use super::*;
 
-    use mentat_core::{
-        Schema,
+    use core_traits::{
         TypedValue,
         ValueType,
     };
 
+    use mentat_core::{
+        Schema,
+    };
+
     use mentat_query::{
         Binding,
         FnArg,

query-algebrizer/src/errors.rs

@@ -12,9 +12,12 @@ extern crate mentat_query;
 
 use std; // To refer to std::result::Result.
 
+use core_traits::{
+    ValueType,
+};
+
 use mentat_core::{
     EdnParseError,
-    ValueType,
     ValueTypeSet,
 };
 

query-algebrizer/src/lib.rs

@@ -28,13 +28,13 @@ mod clauses;
 
 use core_traits::{
     Entid,
+    TypedValue,
+    ValueType,
 };
 
 use mentat_core::{
     CachedAttributes,
     Schema,
-    TypedValue,
-    ValueType,
     parse_query,
 };
 

query-algebrizer/src/types.rs

@@ -16,12 +16,12 @@ use std::fmt::{
 
 use core_traits::{
     Entid,
+    TypedValue,
+    ValueType,
 };
 
 use mentat_core::{
-    TypedValue,
     ValueRc,
-    ValueType,
     ValueTypeSet,
 };
 

query-algebrizer/tests/fulltext.rs

@@ -15,10 +15,13 @@ extern crate mentat_query_algebrizer;
 
 mod utils;
 
+use core_traits::{
+    ValueType,
+};
+
 use mentat_core::{
     Attribute,
     Schema,
-    ValueType,
 };
 
 use mentat_query::{

query-algebrizer/tests/ground.rs

@@ -17,11 +17,14 @@ mod utils;
 
 use std::collections::BTreeMap;
 
+use core_traits::{
+    ValueType,
+    TypedValue,
+};
+
 use mentat_core::{
     Attribute,
     Schema,
-    ValueType,
-    TypedValue,
 };
 
 use mentat_query::{

query-algebrizer/tests/predicate.rs

@@ -15,13 +15,16 @@ extern crate mentat_query_algebrizer;
 
 mod utils;
 
+use core_traits::{
+    ValueType,
+    TypedValue,
+};
+
 use mentat_core::{
     Attribute,
     DateTime,
     Schema,
-    TypedValue,
     Utc,
-    ValueType,
     ValueTypeSet,
 };
 

query-algebrizer/tests/type_reqs.rs

@@ -8,8 +8,8 @@
 // CONDITIONS OF ANY KIND, either express or implied. See the License for the
 // specific language governing permissions and limitations under the License.
 
-extern crate mentat_core;
 extern crate core_traits;
+extern crate mentat_core;
 extern crate mentat_query;
 extern crate mentat_query_algebrizer;
 
@@ -21,9 +21,12 @@ use utils::{
     bails,
 };
 
+use core_traits::{
+    ValueType,
+};
+
 use mentat_core::{
     Schema,
-    ValueType,
 };
 
 use mentat_query_algebrizer::Known;

query-algebrizer/tests/utils/mod.rs

@@ -15,12 +15,12 @@
 
 use core_traits::{
     Entid,
+    ValueType,
 };
 
 use mentat_core::{
     Attribute,
     Schema,
-    ValueType,
 };
 
 use mentat_query::{

query-projector/src/aggregates.rs

@@ -8,8 +8,11 @@
 // CONDITIONS OF ANY KIND, either express or implied. See the License for the
 // specific language governing permissions and limitations under the License.
 
-use mentat_core::{
+use core_traits::{
     ValueType,
+};
+
+use mentat_core::{
     ValueTypeSet,
 };
 

query-projector/src/binding_tuple.rs

@@ -8,7 +8,7 @@
 // CONDITIONS OF ANY KIND, either express or implied. See the License for the
 // specific language governing permissions and limitations under the License.
 
-use mentat_core::{
+use core_traits::{
     Binding,
 };
 

query-projector/src/lib.rs

@@ -37,11 +37,14 @@ use rusqlite::{
     Rows,
 };
 
-use mentat_core::{
+use core_traits::{
     Binding,
-    Schema,
     TypedValue,
     ValueType,
+};
+
+use mentat_core::{
+    Schema,
     ValueTypeTag,
 };
 

query-projector/src/pull.rs

@@ -14,14 +14,14 @@ use std::collections::{
 };
 
 use core_traits::{
+    Binding,
     Entid,
+    StructuredMap,
+    TypedValue,
 };
 
 use mentat_core::{
-    Binding,
     Schema,
-    StructuredMap,
-    TypedValue,
     ValueRc,
 };
 

query-projector/src/relresult.rs

@@ -8,7 +8,7 @@
 // CONDITIONS OF ANY KIND, either express or implied. See the License for the
 // specific language governing permissions and limitations under the License.
 
-use mentat_core::{
+use core_traits::{
     Binding,
     TypedValue,
 };

query-projector/tests/aggregates.rs

@@ -16,12 +16,12 @@ extern crate mentat_query_projector;
 
 use core_traits::{
     Entid,
+    ValueType,
 };
 
 use mentat_core::{
     Attribute,
     Schema,
-    ValueType,
 };
 
 use mentat_query::{

query-pull/src/lib.rs

@@ -82,17 +82,17 @@ use std::iter::{
 };
 
 use core_traits::{
+    Binding,
     Entid,
+    TypedValue,
+    StructuredMap,
 };
 
 use mentat_core::{
-    Binding,
     Cloned,
     HasSchema,
     Keyword,
     Schema,
-    StructuredMap,
-    TypedValue,
     ValueRc,
 };
 

query-sql/src/lib.rs

@@ -18,12 +18,12 @@ use std::boxed::Box;
 
 use core_traits::{
     Entid,
+    TypedValue,
+    ValueType,
 };
 
 use mentat_core::{
     SQLTypeAffinity,
-    TypedValue,
-    ValueType,
 };
 
 use mentat_query::{

query-translator/src/lib.rs

@@ -10,6 +10,7 @@
 
 extern crate failure;
 
+extern crate core_traits;
 extern crate mentat_core;
 extern crate mentat_query;
 extern crate mentat_query_algebrizer;

query-translator/src/translate.rs

@@ -8,13 +8,16 @@
 // CONDITIONS OF ANY KIND, either express or implied. See the License for the
 // specific language governing permissions and limitations under the License.
 
+use core_traits::{
+    TypedValue,
+    ValueType,
+};
+
 use mentat_core::{
     Schema,
     SQLTypeAffinity,
     SQLValueType,
     SQLValueTypeSet,
-    TypedValue,
-    ValueType,
     ValueTypeTag,
     ValueTypeSet,
 };

query-translator/tests/translate.rs

@@ -28,13 +28,13 @@ use mentat_query::{
 
 use core_traits::{
     Entid,
+    TypedValue,
+    ValueType,
 };
 
 use mentat_core::{
     Attribute,
     Schema,
-    TypedValue,
-    ValueType,
 };
 
 use mentat_query_algebrizer::{

sql/Cargo.toml

@@ -12,5 +12,8 @@ ordered-float = "0.5"
 version = "0.13"
 features = ["limits"]
 
+[dependencies.core_traits]
+path = "../core-traits"
+
 [dependencies.mentat_core]
 path = "../core"

sql/src/lib.rs

@@ -13,6 +13,7 @@ extern crate failure;
 extern crate ordered_float;
 extern crate rusqlite;
 
+extern crate core_traits;
 extern crate mentat_core;
 
 use std::rc::Rc;
@@ -21,9 +22,12 @@ use std::collections::HashMap;
 
 use ordered_float::OrderedFloat;
 
+use core_traits::{
+    TypedValue,
+};
+
 use mentat_core::{
     ToMicros,
-    TypedValue,
     ValueRc,
 };
 

src/conn.rs

@@ -48,6 +48,9 @@ use edn::{
 pub use core_traits::{
     Entid,
     KnownEntid,
+    StructuredMap,
+    TypedValue,
+    ValueType,
 };
 
 use mentat_core::{
@@ -55,11 +58,8 @@ use mentat_core::{
     HasSchema,
     Keyword,
     Schema,
-    StructuredMap,
     TxReport,
-    TypedValue,
     ValueRc,
-    ValueType,
 };
 
 use mentat_db::cache::{
@@ -861,12 +861,15 @@ mod tests {
         Instant,
     };
 
-    use mentat_core::{
-        CachedAttributes,
+    use core_traits::{
         Binding,
         TypedValue,
     };
 
+    use mentat_core::{
+        CachedAttributes,
+    };
+
     use ::query::{
         Variable,
     };

src/entity_builder.rs

@@ -68,9 +68,12 @@ use edn::entities::{
     ValuePlace,
 };
 
+use core_traits::{
+    TypedValue,
+};
+
 use mentat_core::{
     TxReport,
-    TypedValue,
 };
 
 use conn::{

src/errors.rs

@@ -18,9 +18,12 @@ use rusqlite;
 
 use edn;
 
+use core_traits::{
+    ValueType,
+};
+
 use mentat_core::{
     Attribute,
-    ValueType,
 };
 
 use mentat_db;

src/lib.rs

@@ -36,24 +36,24 @@ extern crate mentat_sql;
 extern crate mentat_tolstoy;
 
 pub use core_traits::{
+    Binding,
     Entid,
     KnownEntid,
+    StructuredMap,
+    TypedValue,
+    ValueType,
+    now,
 };
 
 pub use mentat_core::{
     Attribute,
-    Binding,
     DateTime,
     HasSchema,
     Keyword,
     Schema,
-    StructuredMap,
     TxReport,
-    TypedValue,
     Utc,
     Uuid,
-    ValueType,
-    now,
 };
 
 pub use mentat_query::{

src/query.rs

@@ -14,15 +14,15 @@ use rusqlite::types::ToSql;
 use std::rc::Rc;
 
 use core_traits::{
+    Binding,
     Entid,
     KnownEntid,
+    TypedValue,
 };
 
 use mentat_core::{
-    Binding,
     HasSchema,
     Schema,
-    TypedValue,
 };
 
 use mentat_query_algebrizer::{

src/query_builder.rs

@@ -15,15 +15,15 @@ use std::collections::{
 
 pub use core_traits::{
     Entid,
+    Binding,
+    TypedValue,
+    ValueType,
 };
 
 use mentat_core::{
     DateTime,
     Keyword,
-    Binding,
-    TypedValue,
     Utc,
-    ValueType,
 };
 
 use ::{

src/store.rs

@@ -28,13 +28,13 @@ use edn;
 
 use core_traits::{
     Entid,
+    StructuredMap,
+    TypedValue,
 };
 
 use mentat_core::{
     Keyword,
-    StructuredMap,
     TxReport,
-    TypedValue,
     ValueRc,
 };
 use mentat_db::{
@@ -280,11 +280,14 @@ mod tests {
         SQLiteAttributeCache,
     };
 
+    use core_traits::{
+        TypedValue,
+        ValueType,
+    };
+
     use mentat_core::{
         CachedAttributes,
         HasSchema,
-        TypedValue,
-        ValueType,
     };
 
     use ::entity_builder::{

tests/pull.rs

@@ -11,6 +11,7 @@
 #[macro_use]
 extern crate mentat;
 extern crate mentat_core;
+extern crate core_traits;
 extern crate mentat_query_pull;
 
 use std::collections::{
@@ -23,10 +24,13 @@ use std::path::{
     PathBuf,
 };
 
-// TODO: re-export from Mentat.
-use mentat_core::{
+use core_traits::{
     Binding,
     StructuredMap,
+};
+
+// TODO: re-export from Mentat.
+use mentat_core::{
     ValueRc,
 };
 

tests/query.rs

@@ -29,6 +29,7 @@ use chrono::FixedOffset;
 use core_traits::{
     Entid,
     KnownEntid,
+    ValueType,
 };
 
 use mentat_core::{
@@ -36,7 +37,6 @@ use mentat_core::{
     HasSchema,
     Utc,
     Uuid,
-    ValueType,
     ValueTypeSet,
 };
 

tests/tolstoy.rs

@@ -9,7 +9,6 @@
 // specific language governing permissions and limitations under the License.
 
 extern crate mentat;
-extern crate mentat_core;
 extern crate core_traits;
 
 #[cfg(feature = "syncable")]
@@ -30,8 +29,6 @@ mod tests {
     use mentat_tolstoy::errors::Result;
     use core_traits::{
         Entid,
-    };
-    use mentat_core::{
         TypedValue,
         ValueType,
     };

tolstoy/src/tx_processor.rs

@@ -21,9 +21,6 @@ use mentat_db::{
 
 use core_traits::{
     Entid,
-};
-
-use mentat_core::{
     TypedValue,
 };
 

tools/cli/Cargo.toml

@@ -46,8 +46,8 @@ path = "../../edn"
 [dependencies.mentat_query]
 path = "../../query"
 
-[dependencies.mentat_core]
-path = "../../core"
+[dependencies.core_traits]
+path = "../../core-traits"
 
 [dependencies.mentat_db]
 path = "../../db"

tools/cli/src/mentat_cli/lib.rs

@@ -31,7 +31,7 @@ extern crate time;
 extern crate mentat;
 extern crate edn;
 extern crate mentat_query;
-extern crate mentat_core;
+extern crate core_traits;
 extern crate mentat_db;
 
 use getopts::Options;

tools/cli/src/mentat_cli/repl.rs

@@ -30,7 +30,7 @@ use time::{
     PreciseTime,
 };
 
-use mentat_core::{
+use core_traits::{
     StructuredMap,
 };