idris-lang/Idris2
1
1
Fork 0
mirror of https://github.com/idris-lang/Idris2.git synced 2024-12-25 12:42:02 +03:00
Code Issues Projects Releases Wiki Activity

Returning function names evalConAlt and evalTree in Core.Normalise.Eval

Browse Source
This commit is contained in:
Asafov Alexander 2023-05-03 00:18:59 +03:00 committed by CodingCellist
parent f93c927952
commit 2cafbe217b
1 changed files with 22 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

43
src/Core/Normalise/Eval.idr
View File

@ -85,7 +85,7 @@ data CaseResult a
record TermWithEnv (free : List Name) where
constructor MkTermEnv
varsEnv : List Name
{ varsEnv : List Name }
locEnv : LocalEnv free varsEnv
term : Term $ varsEnv ++ free
@ -322,7 +322,8 @@ parameters (defs : Defs, topopts : EvalOpts)
getCaseBound (arg :: args) [] loc = Nothing -- mismatched arg length
getCaseBound (arg :: args) (n :: ns) loc = (arg ::) <$> getCaseBound args ns loc
conAltTerm : {auto c : Ref Ctxt Defs} ->
-- Returns the case term from the matched pattern with the LocalEnv (arguments from constructor pattern ConCase)
evalConAlt : {auto c : Ref Ctxt Defs} ->
{more, free : _} ->
Env Term free ->
LocalEnv free more -> EvalOpts -> FC ->
@ -331,10 +332,10 @@ parameters (defs : Defs, topopts : EvalOpts)
List (Closure free) ->
CaseTree (args ++ more) ->
Core (CaseResult (TermWithEnv free))
conAltTerm env loc opts fc stk args args' sc
evalConAlt env loc opts fc stk args args' sc
= do let Just bound = getCaseBound args' args loc
| Nothing => pure GotStuck
caseTermTree env bound opts fc stk sc
evalTree env bound opts fc stk sc
tryAlt : {auto c : Ref Ctxt Defs} ->
{free, more : _} ->
@ -348,41 +349,41 @@ parameters (defs : Defs, topopts : EvalOpts)
-- Ordinary constructor matching
tryAlt {more} env loc opts fc stk (NDCon _ nm tag' arity args') (ConCase x tag args sc)
= if tag == tag'
then conAltTerm env loc opts fc stk args (map snd args') sc
then evalConAlt env loc opts fc stk args (map snd args') sc
else pure NoMatch
-- Type constructor matching, in typecase
tryAlt {more} env loc opts fc stk (NTCon _ nm tag' arity args') (ConCase nm' tag args sc)
= if nm == nm'
then conAltTerm env loc opts fc stk args (map snd args') sc
then evalConAlt env loc opts fc stk args (map snd args') sc
else pure NoMatch
-- Primitive type matching, in typecase
tryAlt env loc opts fc stk (NPrimVal _ c) (ConCase nm tag args sc)
= case args of -- can't just test for it in the `if` for typing reasons
[] => if UN (Basic $ show c) == nm
then caseTermTree env loc opts fc stk sc
then evalTree env loc opts fc stk sc
else pure NoMatch
_ => pure NoMatch
-- Type of type matching, in typecase
tryAlt env loc opts fc stk (NType _ _) (ConCase (UN (Basic "Type")) tag [] sc)
= caseTermTree env loc opts fc stk sc
= evalTree env loc opts fc stk sc
-- Arrow matching, in typecase
tryAlt {more}
env loc opts fc stk (NBind pfc x (Pi fc' r e aty) scty) (ConCase (UN (Basic "->")) tag [s,t] sc)
= conAltTerm {more} env loc opts fc stk [s,t]
= evalConAlt {more} env loc opts fc stk [s,t]
[aty,
MkNFClosure opts env (NBind pfc x (Lam fc' r e aty) scty)]
sc
-- Delay matching
tryAlt env loc opts fc stk (NDelay _ _ ty arg) (DelayCase tyn argn sc)
= caseTermTree env (ty :: arg :: loc) opts fc stk sc
= evalTree env (ty :: arg :: loc) opts fc stk sc
-- Constant matching
tryAlt env loc opts fc stk (NPrimVal _ c') (ConstCase c sc)
= if c == c' then caseTermTree env loc opts fc stk sc
= if c == c' then evalTree env loc opts fc stk sc
else pure NoMatch
-- Default case matches against any *concrete* value
tryAlt env loc opts fc stk val (DefaultCase sc)
= if concrete val
then caseTermTree env loc opts fc stk sc
then evalTree env loc opts fc stk sc
else pure GotStuck
where
concrete : NF free -> Bool
@ -405,7 +406,7 @@ parameters (defs : Defs, topopts : EvalOpts)
log "eval.casetree.stuck" 2 "Ran out of alternatives"
pure GotStuck
findAlt env loc opts fc stk val (x :: xs)
= do (Result (MkTermEnv vars newLoc val)) <- tryAlt env loc opts fc stk val x
= do (Result (MkTermEnv newLoc val)) <- tryAlt env loc opts fc stk val x
| NoMatch => findAlt env loc opts fc stk val xs
| GotStuck => do
logC "eval.casetree.stuck" 5 $ do
@ -413,14 +414,14 @@ parameters (defs : Defs, topopts : EvalOpts)
x <- toFullNames x
pure $ "Got stuck matching \{show val} against \{show x}"
pure GotStuck
pure (Result (MkTermEnv vars newLoc val))
pure (Result (MkTermEnv newLoc val))
caseTermTree : {auto c : Ref Ctxt Defs} ->
evalTree : {auto c : Ref Ctxt Defs} ->
{args, free : _} -> Env Term free -> LocalEnv free args ->
EvalOpts -> FC ->
Stack free -> CaseTree args ->
Core (CaseResult (TermWithEnv free))
caseTermTree env loc opts fc stk (Case {name} idx x _ alts)
evalTree env loc opts fc stk (Case {name} idx x _ alts)
= do xval <- evalLocal env fc Nothing idx (varExtend x) [] loc
-- we have not defined quote yet (it depends on eval itself) so we show the NF
-- i.e. only the top-level constructor.
@ -429,9 +430,9 @@ parameters (defs : Defs, topopts : EvalOpts)
pure "Evaluated \{show name} to \{show xval}"
let loc' = updateLocal opts env idx (varExtend x) loc xval
findAlt env loc' opts fc stk xval alts
caseTermTree env loc opts fc stk (STerm _ tm)
= pure (Result $ MkTermEnv _ loc $ embed tm)
caseTermTree env loc opts fc stk _ = pure GotStuck
evalTree env loc opts fc stk (STerm _ tm)
= pure (Result $ MkTermEnv loc $ embed tm)
evalTree env loc opts fc stk _ = pure GotStuck
-- Take arguments from the stack, as long as there's enough.
-- Returns the arguments, and the rest of the stack
@ -506,10 +507,10 @@ parameters (defs : Defs, topopts : EvalOpts)
pure "Cannot reduce under-applied \{show def}"
pure def
Just (locs', stk') =>
do (Result (MkTermEnv _ newLoc res)) <- caseTermTree env locs' opts fc stk' tree
do (Result (MkTermEnv newLoc res)) <- evalTree env locs' opts fc stk' tree
| _ => do logC "eval.def.stuck" 50 $ do
def <- toFullNames def
pure "caseTermTree failed on \{show def}"
pure "evalTree failed on \{show def}"
pure def
case fuel opts of
Nothing => evalWithOpts defs opts env newLoc res stk'