The Fortress Language Specification - CiteSeerX

40.1.4 opr [j: IndexInt]:T throws { IndexOutOfBoundsException }
40.1.5 opr nat k[j: IntegerStatick]: T where { k < n }
Subscripting returns element j of this linear sequence. Indexing is zero-origin; an IndexOutOfBoundsException is
thrown unless 0 ≤ j < n , where n is the length of the linear sequence. If the subscript is a static expression, then its
validity is checked statically, and no exception will occur at run time.
40.1.6 opr nat m[r:RangeOfStaticSizeIndexInt, m]:LinearSequenceT, m
throws { IndexOutOfBoundsException } where { m ≤ n }
40.1.7 opr int a,nat m,int c[r: StaticRangea, m, c]:LinearSequenceT, m
where { 0 ≤ a < n, 0 ≤ a + m · c < n }
Subscripting with a range of static size m returns the indicated subsequence of this linear sequence. Indexing is zeroorigin;
an IndexOutOfBoundsException is thrown unless r ⊆ 0 #n, where n is the length of the linear sequence.
If the subscript is a static range, then its validity is checked statically, and no exception will occur at run time. Element
k of the result sequence is the same as element r.lowerBound + k × r.stride of this linear sequence, for all
0 ≤ k < m .
40.1.8 opr [j: IndexInt] := (v: T):LinearSequenceT, n throws { IndexOutOfBoundsException }
40.1.9 opr nat k[j: IntegerStatick] := (v:T): LinearSequenceT, n where { k < n }
After subscripted value object assignment, element j of the subscripted variable is the same as the given value v ,
and all other elements are the same as before. Indexing is zero-origin; an IndexOutOfBoundsException is thrown
unless 0 ≤ j < n , where n is the length of the linear sequence. If the subscript is a static expression, then its validity
is checked statically, and no exception will occur at run time.
40.1.10 opr nat m[r:RangeOfStaticSizeIndexInt, m] := (v:LinearSequenceT, m):
LinearSequenceT, n
throws { IndexOutOfBoundsException } where { m ≤ n }
40.1.11 opr int a,nat m,int c[r: StaticRangea, m, c] := (v:LinearSequenceT, m):
LinearSequenceT, n
where { 0 ≤ a < n, 0 ≤ a + m · c < n }
After subscripted value object assignment, elements of the subscripted variable selected by r are the same as corresponding
elements of v , and all other elements are the same as before; specifically, element r.lowerBound + k × r.stride
of the updated variable is the same as element k of v , for all 0 ≤ k < m . Indexing is zero-origin; an IndexOutOfBoundsException
is thrown unless r ⊆ 0 #n, where n is the length of the linear sequence. If the subscript is a static range, then its
validity is checked statically, and no exception will occur at run time.
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