type s, t

class b < {x . x < s}

%% assume s < t

class a < {x . x < t}

class a < b

class a < {y . y < t}

%% ok (but only for simple tokens)

class a < {y . y < s}

class c, d < Type

class a < (c, d)

class e < a

%% ok

class h < e

%% ok

class h < (a, b)

%% ok

class e < {x . x < t}

%% Classes ---------------------------------------------------------------

a < ({y . y < s}, {x . x < t}, b, c, d)

b < {x . x < s}

c < Type

d < Type

e < ({x . x < t}, a)

h < (a, b, e)

%% Type Constructors -----------------------------------------------------

Logical : Type := Unit ->? Unit

Pred : Type -> Type := \ a : Type . a_v-1 ->? Unit

Unit : Type

__*__ : +Type -> +Type -> Type

__-->__ : -Type -> +Type -> Type < (__-->?__, __->__)

__-->?__ : -Type -> +Type -> Type < __->?__

__->__ : -Type -> +Type -> Type < __->?__

__->?__ : -Type -> +Type -> Type

s : Type

t : Type

%% Assumptions -----------------------------------------------------------

__/\__ : ? Unit * ? Unit ->? Unit %(fun)%

__<=>__ : ? Unit * ? Unit ->? Unit %(fun)%

__=__ : forall a : Type . a_v-1 * a_v-1 ->? Unit %(fun)%

__=>__ : ? Unit * ? Unit ->? Unit %(fun)%

__=e=__ : forall a : Type . a_v-1 * a_v-1 ->? Unit %(fun)%

__\/__ : ? Unit * ? Unit ->? Unit %(fun)%

__if__ : ? Unit * ? Unit ->? Unit %(fun)%

__when__else__

: forall a : Type . a_v-1 * ? Unit * a_v-1 ->? a_v-1 %(fun)%

bottom : forall a : Type . a_v-1 %(fun)%

def__ : forall a : Type . a_v-1 ->? Unit %(fun)%

false : Unit %(fun)%

not__ : ? Unit ->? Unit %(fun)%

true : Unit %(fun)%

�__ : ? Unit ->? Unit %(fun)%

%% Diagnostics -----------------------------------------------------------

*** Warning 7.7, redeclared class 'a'

*** Warning 9.7, redeclared class 'a'

*** Warning 11.7, redeclared class 'a'

*** Warning 15.7, redeclared class 'a'

*** Warning 21.7, redeclared class 'h'

*** Warning 23.7, redeclared class 'e'