Added annotated versions of the for macros that generate vectors.

They are purposedly left out of the documentation since the typchecker
can't currently handle their expansion.

original commit: a10d145f25dd4257dd216ea0b1e97184a29c7683

collects/tests/typed-scheme/xfail/for-inference.rkt

@@ -79,3 +79,9 @@
 (for/and: : Boolean
           ((i : Exact-Positive-Integer '(1 2 3)))
           (< i 3))
+
+;; for/vector: would need stronger inference. same for for*/vector and
+;; both flvector variants
+(for/vector: : (Vectorof Integer)
+             ((x : Integer (in-range 10)))
+             x)

collects/typed-scheme/private/prims.rkt

@@ -33,6 +33,7 @@ This file defines two sorts of primitives. All of them are provided into any mod
          (rename-in racket/contract [-> c->])
          "base-types.rkt"
          "base-types-extra.rkt"
+         racket/flonum ; for for/flvector and for*/flvector
          (for-syntax 
           syntax/parse
 	  syntax/private/util
@@ -511,8 +512,8 @@ This file defines two sorts of primitives. All of them are provided into any mod
      (quasisyntax/loc
          stx
        (begin (define-syntax name (define-for-variant #'untyped-name)) ...))]))
-;; for/hash{,eq,eqv}:, for/and:, for/first: and for/last:'s expansions
-;; can't currently be handled by the typechecker.
+;; for/hash{,eq,eqv}:, for/vector:, for/flvector:, for/and:, for/first: and
+;; for/last:'s expansions can't currently be handled by the typechecker.
 ;; They have been left out of the documentation.
 (define-for-variants
   (for/list: for/list)
@@ -522,7 +523,9 @@ This file defines two sorts of primitives. All of them are provided into any mod
   (for/and: for/and)
   (for/or: for/or)
   (for/first: for/first)
-  (for/last: for/last))
+  (for/last: for/last)
+  (for/vector: for/vector)
+  (for/flvector: for/flvector))
 
 ;; Unlike with the above, the inferencer can handle any number of #:when
 ;; clauses with these 2.
@@ -595,7 +598,9 @@ This file defines two sorts of primitives. All of them are provided into any mod
   (for*/and: for*/and)
   (for*/or: for*/or)
   (for*/first: for*/first)
-  (for*/last: for*/last))
+  (for*/last: for*/last)
+  (for*/vector: for*/vector)
+  (for*/flvector: for*/flvector))
 
 (define-for-syntax (define-for*-folding-variant name)
   (lambda (stx)

collects/typed-scheme/scribblings/ts-reference.scrbl

@@ -309,6 +309,8 @@ the return type of a @racket[for] form is optional. Unlike
 @;@defform[(for/hash: : u (for:-clause ...) expr ...+)] @; the ones that are commented out don't currently work
 @;@defform[(for/hasheq: : u (for:-clause ...) expr ...+)]
 @;@defform[(for/hasheqv: : u (for:-clause ...) expr ...+)]
+@;@defform[(for/vector: : u (for:-clause ...) expr ...+)]
+@;@defform[(for/flvector: : u (for:-clause ...) expr ...+)]
 @;@defform[(for/and: : u (for:-clause ...) expr ...+)]
 @defform[(for/or:   : u (for:-clause ...) expr ...+)]
 @;@defform[(for/first: : u (for:-clause ...) expr ...+)]