Author: bernhard Date: Sun Jan 11 04:40:38 2009 New Revision: 35410 Modified: trunk/docs/pdds/draft/pdd08_keys.pod
Log: [codingstd] shorten long lines. Modified: trunk/docs/pdds/draft/pdd08_keys.pod ============================================================================== --- trunk/docs/pdds/draft/pdd08_keys.pod (original) +++ trunk/docs/pdds/draft/pdd08_keys.pod Sun Jan 11 04:40:38 2009 @@ -19,10 +19,11 @@ specific indexed element of an aggregate PMC. Examples of a aggregate PMCs include C<Hash>, C<FixedIntegerArray> and C<ResizablePMCArray>. -Non-aggregates may also support C<_keyed> variants of the VTABLE functions, but -they not do anything particularly clever. For instance, PMC types implementing -Perl references will merely pass the index on to the referent. These aren't -aggregates because they don't directly store or reference elements. +Non-aggregates may also support C<_keyed> variants of the VTABLE functions, +but they not do anything particularly clever. For instance, PMC types +implementing Perl references will merely pass the index on to the referent. +These aren't aggregates because they don't directly store or reference +elements. Indexing operations take one or more aggregate B<keys>. At runtime these operations will index into the B<aggregate> using the C<key> and return a @@ -32,8 +33,8 @@ The B<key> here is the constant integer C<12> The aggregate is the C<Perl6Array> C<@a>. In the process of this assignment, Parrot will have to -extract the PMC in element 12 of the array, producing a C<value>. C<$b> is then -assigned to this value. +extract the PMC in element 12 of the array, producing a C<value>. +C<$b> is then assigned to this value. Now, how does this all get implemented? @@ -52,8 +53,8 @@ C<PMC_int_val(key)>). For example, indexing the multidimensional array C<@foo[$a,12;"hi"]> -produces three PMCs; one with a PMC type, one with an integer type and one with -a string type. +produces three PMCs; one with a PMC type, one with an integer type +and one with a string type. The key type is encoded in the PMC flags using 8 bits based on the following scheme (from includes/parrot/key.h):
