by using a SK_OverloadedConstructor instead of a SK_Constructor

add type constraints in constructors and function arguments with universal quantifier (from iTask branch)

add constructors PE_Matches and IsConstructor in module syntax

g
  # (_,a=:b) = g
  = (a,b)

remove import of StdCompare in checksupport.dcl,
changed some other imports

call instance functions for OBJECT, CONS and FIELD directly, with generic info

because OBJECT, CONS and FIELD have this kind and are the only types using generic info

fix error message for failed qualified import

it is not used because dcl macros cannot use icl macros.

use UniqueSingleArraySelector for a![i] instead of NormalSelector and
add UniqueSingleArraySelectorUniqueElementResult

and is explicitly imported

rhs (for example Macro:==1+1) is used in a pattern

"demanded attribute cannot be offered by shared object" error
message more accurate,
store position in CaseAlt (added field calt_position)

they are represented by the TFA constructor for types

a few others)

s/\<mod_name\>/mod_ident/g
s/\<ps_field_name\>/ps_field_ident/g
s/\<ps_selector_name\>/ps_selector_ident/g
s/\<pc_cons_name\>/pc_cons_ident/g
s/\<class_name\>/class_ident/g
s/\<gen_name\>/gen_ident/g
s/\<gen_member_name\>/gen_member_ident/g
s/\<gc_name\>/gc_ident/g
s/\<gc_gname\>/gc_gident/g
s/\<fs_name\>/fs_ident/g
s/\<td_name\>/td_ident/g
s/\<fv_name\>/fv_ident/g
s/\<var_name\>/var_ident/g
s/\<type_name\>/type_ident/g
s/\<symb_name\>/symb_ident/g
s/\<tv_name\>/tv_ident/g
s/\<av_name\>/av_ident/g
s/\<me_symb\>/me_ident/g
s/\<ft_symb\>/ft_ident/g
s/\<fun_symb\>/fun_ident/g
s/\<cons_symb\>/cons_ident/g
s/\<sd_symb\>/sd__ident/g

a compiler crash in transform when a macro uses another macro
in a pattern, that are both defined in the same module

with existential variables)

to record constructor only for records with existential
variables, fix line numbers in case expressions generated
from guards

a bug if an exported macro uses an exported function from
the current module