124 lines
5.3 KiB
Rust
124 lines
5.3 KiB
Rust
// Copyright 2016 Mozilla
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License"); you may not use
|
|
// this file except in compliance with the License. You may obtain a copy of the
|
|
// License at http://www.apache.org/licenses/LICENSE-2.0
|
|
// Unless required by applicable law or agreed to in writing, software distributed
|
|
// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
|
|
// 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::{
|
|
TypedValue,
|
|
ValueType,
|
|
};
|
|
|
|
use mentat_query::{
|
|
FnArg,
|
|
NonIntegerConstant,
|
|
PlainSymbol,
|
|
};
|
|
|
|
use clauses::ConjoiningClauses;
|
|
|
|
use errors::{
|
|
Result,
|
|
Error,
|
|
ErrorKind,
|
|
};
|
|
|
|
use types::{
|
|
EmptyBecause,
|
|
QueryValue,
|
|
};
|
|
|
|
/// Argument resolution.
|
|
impl ConjoiningClauses {
|
|
/// Take a function argument and turn it into a `QueryValue` suitable for use in a concrete
|
|
/// constraint.
|
|
/// Additionally, do two things:
|
|
/// - Mark the pattern as known-empty if any argument is known non-numeric.
|
|
/// - Mark any variables encountered as numeric.
|
|
pub fn resolve_numeric_argument(&mut self, function: &PlainSymbol, position: usize, arg: FnArg) -> Result<QueryValue> {
|
|
use self::FnArg::*;
|
|
match arg {
|
|
FnArg::Variable(var) => {
|
|
self.constrain_var_to_numeric(var.clone());
|
|
self.column_bindings
|
|
.get(&var)
|
|
.and_then(|cols| cols.first().map(|col| QueryValue::Column(col.clone())))
|
|
.ok_or_else(|| Error::from_kind(ErrorKind::UnboundVariable(var.name())))
|
|
},
|
|
// Can't be an entid.
|
|
EntidOrInteger(i) => Ok(QueryValue::TypedValue(TypedValue::Long(i))),
|
|
IdentOrKeyword(_) |
|
|
SrcVar(_) |
|
|
Constant(NonIntegerConstant::Boolean(_)) |
|
|
Constant(NonIntegerConstant::Text(_)) |
|
|
Constant(NonIntegerConstant::Uuid(_)) |
|
|
Constant(NonIntegerConstant::Instant(_)) | // Instants are covered below.
|
|
Constant(NonIntegerConstant::BigInteger(_)) |
|
|
Vector(_) => {
|
|
self.mark_known_empty(EmptyBecause::NonNumericArgument);
|
|
bail!(ErrorKind::InvalidArgument(function.clone(), "numeric", position));
|
|
},
|
|
Constant(NonIntegerConstant::Float(f)) => Ok(QueryValue::TypedValue(TypedValue::Double(f))),
|
|
}
|
|
}
|
|
|
|
/// Just like `resolve_numeric_argument`, but for `ValueType::Instant`.
|
|
pub fn resolve_instant_argument(&mut self, function: &PlainSymbol, position: usize, arg: FnArg) -> Result<QueryValue> {
|
|
use self::FnArg::*;
|
|
match arg {
|
|
FnArg::Variable(var) => {
|
|
self.constrain_var_to_type(var.clone(), ValueType::Instant);
|
|
self.column_bindings
|
|
.get(&var)
|
|
.and_then(|cols| cols.first().map(|col| QueryValue::Column(col.clone())))
|
|
.ok_or_else(|| Error::from_kind(ErrorKind::UnboundVariable(var.name())))
|
|
},
|
|
Constant(NonIntegerConstant::Instant(v)) => {
|
|
Ok(QueryValue::TypedValue(TypedValue::Instant(v)))
|
|
},
|
|
|
|
// TODO: should we allow integers if they seem to be timestamps? It's ambiguous…
|
|
EntidOrInteger(_) |
|
|
IdentOrKeyword(_) |
|
|
SrcVar(_) |
|
|
Constant(NonIntegerConstant::Boolean(_)) |
|
|
Constant(NonIntegerConstant::Float(_)) |
|
|
Constant(NonIntegerConstant::Text(_)) |
|
|
Constant(NonIntegerConstant::Uuid(_)) |
|
|
Constant(NonIntegerConstant::BigInteger(_)) |
|
|
Vector(_) => {
|
|
self.mark_known_empty(EmptyBecause::NonInstantArgument);
|
|
bail!(ErrorKind::InvalidArgument(function.clone(), "instant", position));
|
|
},
|
|
}
|
|
}
|
|
|
|
/// Take a function argument and turn it into a `QueryValue` suitable for use in a concrete
|
|
/// constraint.
|
|
#[allow(dead_code)]
|
|
fn resolve_argument(&self, arg: FnArg) -> Result<QueryValue> {
|
|
use self::FnArg::*;
|
|
match arg {
|
|
FnArg::Variable(var) => {
|
|
self.column_bindings
|
|
.get(&var)
|
|
.and_then(|cols| cols.first().map(|col| QueryValue::Column(col.clone())))
|
|
.ok_or_else(|| Error::from_kind(ErrorKind::UnboundVariable(var.name())))
|
|
},
|
|
EntidOrInteger(i) => Ok(QueryValue::PrimitiveLong(i)),
|
|
IdentOrKeyword(_) => unimplemented!(), // TODO
|
|
Constant(NonIntegerConstant::Boolean(val)) => Ok(QueryValue::TypedValue(TypedValue::Boolean(val))),
|
|
Constant(NonIntegerConstant::Float(f)) => Ok(QueryValue::TypedValue(TypedValue::Double(f))),
|
|
Constant(NonIntegerConstant::Text(s)) => Ok(QueryValue::TypedValue(TypedValue::typed_string(s.as_str()))),
|
|
Constant(NonIntegerConstant::Uuid(u)) => Ok(QueryValue::TypedValue(TypedValue::Uuid(u))),
|
|
Constant(NonIntegerConstant::Instant(u)) => Ok(QueryValue::TypedValue(TypedValue::Instant(u))),
|
|
Constant(NonIntegerConstant::BigInteger(_)) => unimplemented!(),
|
|
SrcVar(_) => unimplemented!(),
|
|
Vector(_) => unimplemented!(), // TODO
|
|
}
|
|
}
|
|
}
|