| 1 | // |
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| 2 | // Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo |
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| 3 | // |
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| 4 | // The contents of this file are covered under the licence agreement in the |
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| 5 | // file "LICENCE" distributed with Cforall. |
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| 6 | // |
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| 7 | // iterator.h -- |
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| 8 | // |
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| 9 | // Author : Richard C. Bilson |
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| 10 | // Created On : Wed May 27 17:56:53 2015 |
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| 11 | // Last Modified By : Peter A. Buhr |
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| 12 | // Last Modified On : Wed May 27 18:41:57 2015 |
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| 13 | // Update Count : 3 |
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| 14 | // |
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| 15 | |
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| 16 | #ifndef ITERATOR_H |
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| 17 | #define ITERATOR_H |
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| 18 | |
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| 19 | #include "iostream.h" |
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| 20 | |
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| 21 | // An iterator can be used to traverse a data structure. |
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| 22 | context iterator( type iterator_type, type elt_type ) { |
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| 23 | // point to the next element |
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| 24 | // iterator_type ?++( iterator_type * ); |
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| 25 | iterator_type ++?( iterator_type * ); |
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| 26 | iterator_type --?( iterator_type * ); |
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| 27 | |
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| 28 | // can be tested for equality with other iterators |
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| 29 | int ?==?( iterator_type, iterator_type ); |
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| 30 | int ?!=?( iterator_type, iterator_type ); |
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| 31 | |
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| 32 | // dereference to get the pointed-at element |
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| 33 | lvalue elt_type *?( iterator_type ); |
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| 34 | }; |
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| 35 | |
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| 36 | context iterator_for ( type iterator_type, type collection_type, type elt_type | iterator( iterator_type, elt_type ) ) { |
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| 37 | // [ iterator_type begin, iterator_type end ] get_iterators( collection_type ); |
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| 38 | iterator_type begin( collection_type ); |
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| 39 | iterator_type end( collection_type ); |
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| 40 | }; |
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| 41 | |
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| 42 | forall( type iterator_type, type elt_type | iterator( iterator_type, elt_type ) ) |
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| 43 | void for_each( iterator_type begin, iterator_type end, void (*func)( elt_type ) ); |
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| 44 | |
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| 45 | // writes the range [begin, end) to the given stream |
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| 46 | forall( type elt_type | writeable( elt_type ), |
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| 47 | type iterator_type | iterator( iterator_type, elt_type ), |
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| 48 | dtype os_type | ostream( os_type ) ) |
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| 49 | void write_all( iterator_type begin, iterator_type end, os_type *os ); |
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| 50 | |
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| 51 | forall( type elt_type | writeable( elt_type ), |
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| 52 | type iterator_type | iterator( iterator_type, elt_type ), |
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| 53 | dtype os_type | ostream( os_type ) ) |
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| 54 | void write_reverse( iterator_type begin, iterator_type end, os_type *os ); |
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| 55 | |
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| 56 | #endif // ITERATOR_H |
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| 57 | |
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| 58 | // Local Variables: // |
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| 59 | // tab-width: 4 // |
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| 60 | // compile-command: "cfa iterator.c" // |
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| 61 | // End: // |
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