* lisp/emacs-lisp/comp-cstr.el (comp-range-negation): New
function.
(comp-cstr-union-homogeneous-no-range): Rename from
`comp-cstr-union-no-range'.
(comp-cstr-union-homogeneous): Rename from `comp-cstr-union'.
(comp-cstr-union-1): New function.
(comp-cstr-union-no-range, comp-cstr-union): Rewrite in function
of `comp-cstr-union-1'.
* test/lisp/emacs-lisp/comp-cstr-tests.el
(comp-cstr-typespec-tests-alist): Add a bunch of tests.
As the constraint logic of the compiler is not trivial and largely
independent from the rest of the code move it into comp-cstr.el to
ease separation and maintainability.
This commit improve the conversion type
specifier -> constraint for generality.
Lastly this should help with bootstrap time as comp.el compilation
unit is slimmed down.
* lisp/emacs-lisp/comp-cstr.el: New file.
(comp--typeof-types, comp--all-builtin-types): Move from comp.el.
(comp-cstr, comp-cstr-f): Same + rename.
(comp-cstr-ctxt): New struct.
(comp-supertypes, comp-common-supertype-2)
(comp-common-supertype, comp-subtype-p, comp-union-typesets)
(comp-range-1+, comp-range-1-, comp-range-<, comp-range-union)
(comp-range-intersection): Move from comp.el.
(comp-cstr-union-no-range, comp-cstr-union): Move from comp.el and
rename.
(comp-cstr-union-make): New function.
(comp-type-spec-to-cstr, comp-cstr-to-type-spec): Move from
comp.el, rename it and rework it.
* lisp/emacs-lisp/comp.el (comp-known-func-cstr-h): Rework.
(comp-ctxt): Remove two fields and include `comp-cstr-ctxt'.
(comp-mvar, comp-fwprop-call): Update for `comp-cstr' being
renamed.
(comp-fwprop-insn): Use `comp-cstr-union-no-range' or
`comp-cstr-union'.
(comp-ret-type-spec): Use `comp-cstr-union' and rework.
* test/lisp/emacs-lisp/comp-cstr-tests.el: New file.
(comp-cstr-test-ts, comp-cstr-typespec-test): New functions.
(comp-cstr-typespec-tests-alist): New defconst to generate tests
on.
(comp-cstr-generate-tests): New macro.
* test/src/comp-tests.el (comp-tests-type-spec-tests): Update.
(ret-type-spec): Initialize constraint context.
