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A first general restructuration of the doc according to the pattern [tour|tutorial|reference]. In the reference part, objects are documented per topic. In each topic, [definition|c++|python|hdf5] (not yet implemented)
45 lines
1.1 KiB
ReStructuredText
45 lines
1.1 KiB
ReStructuredText
.. highlight:: c
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.. _arr_range:
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range
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=========
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`range` mimics the Python `range`. Arguments of the constructor can be:
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* no argument: it then takes the whole set of indices in the dimension (like `:` in python) ::
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A(range(), 0) // take the first column of A
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* two arguments to specify a range ::
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A(range (0,3), 0) // means A(0,0), A(1,0), A(2,0)
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.. warning::
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the second element is excluded: range(0,3) is 0,1,2, like in Python.
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* three arguments : a range with a step ::
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A(range(0,4,2), 0) // means A(0,0), A(2,0)
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.. _arr_ellipsis:
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ellipsis
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===============
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* Ellipsis can be provided in place of `range`, as in python. The type `ellipsis` is similar to range
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except that it is implicitely repeated to as much as necessary.
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* Example:
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.. triqs_example:: ./range_ell_0.cpp
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* NB: there can be at most one ellipsis per expression (otherwise it would be meaningless).
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* Example of usage:
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Ellipsis are useful to write generic algorithms. For example, imagine that you want to sum
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arrays on their first index :
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.. triqs_example:: ./range_ell_1.cpp
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