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use crate::{
Axiom,
Binder1,
BinderN,
Builder,
BType,
Comp,
InstMode,
InstRule,
LogOpN,
Oc,
Op,
OpCode,
OpMode,
Sig,
Val,
Ident,
VType,
substruct_code,
};
use std::collections::HashMap;
use std::collections::HashSet;
#[derive(Debug)]
pub struct Relevant {
base_types: HashSet<BType>,
ops: HashSet<OpCode>,
}
impl Relevant {
fn new() -> Self {
Self{
base_types: HashSet::new(),
ops: HashSet::new(),
}
}
pub fn union(self, other: Self) -> Self {
let base_types =
self.base_types.union(&other.base_types).cloned().collect();
let ops =
self.ops.union(&other.ops).cloned().collect();
Self { base_types, ops }
}
pub fn add_base_type(mut self, t: BType) -> Self {
self.base_types.insert(t);
self
}
pub fn add_op(mut self, ident: String, types: Vec<VType>) -> Self {
self.ops.insert(OpCode{ident,types,path: None});
self
}
pub fn add_substruct_rel(mut self, t: BType) -> Self {
self.ops.insert(substruct_code(t));
self
}
pub fn add_oc(mut self, oc: OpCode, sig: &Sig) -> Self {
if &oc.ident == "special_recursive" {
return self;
}
self.ops.insert(oc.clone());
match sig.get_applied_op_or_con(&oc).unwrap() {
Oc::Con(ts) => {
self = self.add_base_type(BType::ui_args(
oc.path.clone().unwrap(),
oc.types.clone(),
));
for t in ts {
for t in t.flatten() {
self = self.add_base_type(t.unwrap_base().unwrap());
}
}
}
Oc::Op(Op::Const(op)) => {
self = self.add_base_type(op.vtype.unwrap_base().unwrap());
}
Oc::Op(Op::Fun(op)) => {
for i in op.inputs {
for t in i.flatten() {
self = self.add_base_type(t.unwrap_base().unwrap());
}
}
for t in op.output.flatten() {
self = self.add_base_type(t.unwrap_base().unwrap());
}
}
Oc::Op(Op::Rec(op)) => {
for i in op.inputs {
for t in i.flatten() {
self = self.add_base_type(t.unwrap_base().unwrap());
}
}
for t in op.output.flatten() {
self = self.add_base_type(t.unwrap_base().unwrap());
}
}
Oc::Op(Op::Symbol(op)) => {
for i in op.inputs {
for t in i.flatten() {
self = self.add_base_type(t.unwrap_base().unwrap());
}
}
}
_ => {}
}
self
}
pub fn base_types(&self) -> &HashSet<BType> {
&self.base_types
}
pub fn ops(&self) -> &HashSet<OpCode> {
&self.ops
}
}
impl Comp {
pub fn relevant(&self, sig: &Sig) -> Relevant {
let mut rel = Relevant::new();
match self {
Self::Bind1(b, _x, m) => {
match b {
Binder1::LogQuantifier(_q, xs, body) => {
rel = rel.union(body.relevant(sig));
for (_x,t) in xs {
for bt in t.clone().flatten() {
rel =
rel.add_base_type(bt.unwrap_base().unwrap());
}
}
}
Binder1::LogOpN(op, vs) => {
for v in vs {
rel = rel.union(v.relevant(sig));
}
match op {
LogOpN::Or => {},
LogOpN::And => {},
LogOpN::Pred(code,_) => {
rel = rel.add_oc(code.clone(), sig);
}
}
}
Binder1::Eq(_, vs1, vs2) => {
for v in vs1 {
rel = rel.union(v.relevant(sig));
}
for v in vs2 {
rel = rel.union(v.relevant(sig));
}
}
b => todo!("relevant for {:?}", b),
}
rel = rel.union(m.relevant(sig));
}
Self::BindN(b, _xs, _m) => {
match b {
BinderN::Call(..) =>
todo!("relevant for BinderN::Call"),
b => todo!("relevant for BinderN {:?}", b),
}
}
Self::Ite(v, m1, m2) => {
rel = rel.union(v.relevant(sig));
rel = rel.union(m1.relevant(sig));
rel = rel.union(m2.relevant(sig));
}
Self::Return(..) => {},
m => todo!("relevant for {:?}", m),
}
rel
}
}
impl Val {
fn relevant(&self, sig: &Sig) -> Relevant {
let mut rel = Relevant::new();
match self {
Self::Literal(..) => {},
Self::OpCode(om, oc) => match om {
OpMode::Const | OpMode::ZeroArgAsConst(_) => {
rel = rel.add_oc(oc.clone(), sig);
}
OpMode::RelAbs => panic!("free RelAbs should be gone before checking 'relevant'"),
}
Self::Thunk(..) => panic!("Thunk should be gone before checking 'relevant'"),
Self::Tuple(vs) => {
for v in vs {
rel = rel.union(v.relevant(sig));
}
}
Self::Var(name, types, None, _is_neg) => {
match name {
Ident::Manual(s) => {
let code = OpCode {
ident: s.clone(),
types: types.clone(),
path: None,
};
match sig.get_applied_op(&code) {
Ok(Op::Const(op)) => {
for t in op.vtype.flatten() {
rel = rel.add_base_type(
t.unwrap_base().unwrap()
);
}
rel = rel.add_oc(code, sig);
}
Ok(op) => panic!("Found {:?} as a free value after normalization", &op),
Err(..) => {},
}
}
_ => {},
}
}
Self::Var(_name, types, Some(path), _is_neg) => {
// Just add the path (the enum type) as a base type,
// with its args.
rel = rel.add_base_type(BType::ui_args(path.clone(), types.clone()))
}
}
rel
}
}
impl Sig {
pub fn relevant_with_axioms(&self, term: &Comp) -> (Relevant, Vec<Comp>) {
let mut relevant = term.relevant(self);
for t in &relevant.base_types().clone() {
match self.get_con_codes_with_inputs_btype(t) {
Some(cs) => {
for (_code, inputs) in cs {
for i in inputs {
for a_t in i.clone().flatten() {
// println!("Adding {} due to association with {}", a_t.render(), t);
relevant =
relevant.add_base_type(
a_t.unwrap_base().unwrap()
);
}
}
}
}
None => {},
}
}
let mut inst_axioms: Vec<Comp> = Vec::new();
for a in &self.axioms {
if a.tas.len() == 0 {
let mut g = a.body.get_igen();
let a = a.body.clone().normal_form_single_case(self, &mut g);
inst_axioms.push(a);
} else {
for t in &relevant.base_types().clone() {
match a.inst_for_type(t) {
Some(a) => {
let mut g = a.get_igen();
let a = a.normal_form_single_case(self, &mut g);
inst_axioms.push(a);
}
None => {}
}
}
for c in relevant.ops() {
match a.inst_for_code(c) {
Some(a) => {
let mut g = a.get_igen();
let a = a.normal_form_single_case(self, &mut g);
inst_axioms.push(a);
}
None => {}
}
}
}
}
// Add relevant items from axioms
for a in &inst_axioms {
// println!("axiom: {:?}", &a);
relevant = relevant.union(a.relevant(self));
}
// Do not recurse...
// Add substruct relations and their axioms
if let Some(bases) = &self.inductive_bases {
for b in bases {
relevant = relevant.add_substruct_rel(b.clone());
match b.clone() {
BType::UI(name, ts) => {
let cons = self
.get_con_codes_with_inputs(&name, ts).unwrap();
for m in Builder::substruct_axioms(b.clone(), cons) {
let m = m.build_no_context();
let mut g = m.get_igen();
let a = m.normal_form_single_case(self, &mut g);
inst_axioms.push(a);
}
}
b => unreachable!("Unexpected inductive base {:?}", b),
}
}
}
// println!("Got relevant: {:?}", relevant);
(relevant, inst_axioms)
}
}
impl Axiom {
/// Instantiate for the given BType, if it triggers a rule.
pub fn inst_for_type(&self, b: &BType) -> Option<Comp> {
let rules = match &self.inst_mode {
InstMode::Code(_) => return None,
InstMode::Rules(rules) => rules,
};
for InstRule{left,right} in rules {
let l = left;
let r = right;
match (l,b) {
(BType::UI(name_l, args_l), BType::UI(name, args)) if name_l == name => {
// println!("Matching {} with {}", l, b);
let mut matches: HashMap<String,VType> = HashMap::new();
for (a_l,a) in args_l.iter().zip(args) {
match a_l.clone().unwrap_base().unwrap().get_ta() {
Some(s) => {
matches.insert(s.clone(), a.clone());
},
None => {}
}
}
let mut args = Vec::new();
for t in r.clone() {
args.push(t.expand_types(&matches));
}
// args.push(r.clone().expand_types(&matches));
// println!("Subbing types {:?} for {:?}", &args, &self.tas);
let body = self.body.clone().expand_types_from_call(
&args,
&self.tas
).unwrap();
// println!("Inst axiom body: {:?}", &body);
return Some(body);
}
(_l,_b) => {
// println!("Did not match {} with {}", l, b);
}
}
}
None
}
pub fn inst_for_code(&self, _code: &OpCode) -> Option<Comp> {
// todo: give this a non-trivial implementation
None
}
}