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# class of type
https://en.wikipedia.org/wiki/Kind_(type_theory)
_nat_seq = %0 : %*S # x = n
_real_seq = %0 : %*S # x = r
_tag_seq = %0 : %*S # X = n
_type_seq = %0 : %*S,Type # X = t
_exp_seq = %0 : %*S,Type # x = a : t
_type_names = % 1.Set : % S/Z # X = t, updated in Kind.main via _exp_defs and _type_seq
# todo - generalize to name-types
name_nats = % 1.Set : % S/Z # x = n
name_reals = % 1.Set : % S/Z # x = r
name_tags = % 1.Set : % S/Z # X = n
name_types = % 1.Hash : % S/Type # X = t
name_funs = % 1.Hash : % S/(return:Type, args:Types) # f x0:t0 x1:t1 ... : t = a
name_exps = % 1.Hash : % S/Type # x, t for x = a : t
pre op:S x:Exp : Exp = x.Exp.spot, Pre op x
op type:Type : *S =
type.Exp.tree .
Op o? [o]
Pre o t? o, op t
Binary t o u? op t + (o, op u)
? Exp.seq_error $Fun 'invalid' [type]
unary x:S : B = List.in S.eq ['%', '!', '*'] x
predefined x:S : B = List.in S.eq ['Any', 'Mem', 'File'] x | tag x
tag x:S : B = List.in S.eq ['Term', 'Reg', 'Flag'] x # todo
name : S ? Term =
'Z'? Z_
'I'? I
'B'? B
'C'? C_
'N0'? N0
'N1'? N1
'N2'? N2
'N'? N
'S'? S_
'R'? R_
x? Name x
Fact (name 'Z' . str == 'Z')
Fact (name 'foo' . str == 'foo')
# checking well-formedness of type def
# !%t (! % t) -> (! (% t))
# !%!%t ((! % !) % t) -> (! (% (! (% t))))
# !!%t ((! !) % t) -> (! (! (% t)))
# todo - check if the return type, if polymorphic, is contrained by the input type, except Cast.*
of_type exp=spot,term:Type : Type = term .
Name '_'? spot, Name 'Any' # diff? Any vs _
Name 'Z'? spot, Z_
Name 'I'? spot, I
Name 'B'? spot, B
Name 'C'? spot, C_
Name 'N0'? spot, N0
Name 'N1'? spot, N1
Name 'N2'? spot, N2
Name 'N'? spot, N
Name 'S'? spot, S_
Name 'R'? spot, R_
Name x & (predefined x | Set.in S.eq !_type_names x)? exp
Tnat _? exp # for testing only?
Nat _? exp
Pre o t & List.in S.eq ['+', '*', '!', '%'] o? spot, Pre o t.of_type # seq list opt ref
Post t o & List.in S.eq ['^'] o? spot, Post t.of_type o # row
Binary t o u & unary o? of_type (List.sum_right (t.op + [o]) pre u) # % * 0 -> (% (* 0))
Binary t o u & List.in S.eq ['^', '?', '-', '/', '~'] o? spot, Binary t.of_type o u.of_type # row, fun, map, hash, tree
Binary x ':' t? spot, Binary x ':' t.of_type # key
Row s? spot, Row_ (s of_type)
Tree (_, Name 'Tag') s? spot, Name !Tag.name
Tree s? spot, Tree (s of_type) # todo - check arity
? Exp.seq_error $Fun 'invalid' [exp]
Fact (Exp.eq1 (of_type (Exp.of '!!S')) (Pre '!' (Spot.nil, Pre '!' (Spot.nil, S_))))
_exp_defs : Exp? Z =
_, Binary (spot, Name name) '=' (_, Binary body ':' type)? # x = a : t
Ref.seq_add _exp_seq (Type.name_full spot name),type
_, Binary (spot, Name name) '=' body? body.Exp.tree . #
Nat _? Ref.seq_add (S.is_capital name & _tag_seq | _nat_seq) (Type.name_full spot name) # x = n, X = n
Real _? Ref.seq_add _real_seq (Type.name_full spot name) # x = r
_ & S.is_capital name? Ref.seq_add _type_seq (name, body) # X = t
a? Exp.seq_error $Fun 'invalid' [(spot, a)]
arg_bind : Exp? S, Type = # x:t or x=a:t -> x:t
_, Binary (_, Name x) ':' t? x, t.of_type
_, Binary (_, Name x) '=' (_, Binary _ ':' t)? x, t.of_type
a? Exp.seq_error $Fun 'invalid' [a]
_fun_arg_type : Exp? S, Type =
spot, Binary (spot2, Name x) ':' t? x, (spot, Binary (spot2, Name x) ':' t.of_type)
spot, Binary (spot2, Name x) '=' (spot3, Binary a ':' t)? x, (spot, Binary (spot2, Name x) '=' (spot3, Binary a ':' t.of_type))
a? Exp.seq_error $Fun 'invalid' [a]
_fun_type : Exp? *(S, Type,Types) = # return type, argument types
spot, Binary (_, Binary (_, Tree (_, Name name),args) ':' return) '=' _? # function definition - f x:t.. : t = a
arg_types = List.map (List.map args _fun_arg_type) Row.at1 # Type.TODO_MAX_ARG
[(Type.name_full spot name, (of_type return, arg_types))]
main exps:Exps =
List.do exps _exp_defs
name_nats (!_nat_seq).List.set # x = n
name_reals (!_real_seq).List.set # x = r
name_tags (!_tag_seq).List.set # X = n
_type_names (Map.key_set !_type_seq)
name_types (Map.map1 of_type !_type_seq . List.hash) # after updating _type_names above
name_funs (List.map_add exps _fun_type . List.hash)
name_exps (Map.map1 of_type !_exp_seq).List.hash
of x:S : Type = x.Exp.type_of.of_type
Fact (Exp.eq1 (of 'S') S_)
Fact (Exp.eq1 (of '"42"') (Tnat 42))
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