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Merge pull request #1640 from ethereum/docs-esoteric

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Remove obsolete esoteric features section
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chriseth 2017-02-06 13:05:31 +01:00 committed by GitHub
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docs/miscellaneous.rst
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@ -137,31 +137,6 @@ Different types have different rules for cleaning up invalid values:
| | |will be thrown |
+---------------+---------------+-------------------+
*****************
Esoteric Features
*****************
There are some types in Solidity's type system that have no counterpart in the syntax. One of these types are the types of functions. But still, using ``var`` it is possible to have local variables of these types::
contract FunctionSelector {
function select(bool useB, uint x) returns (uint z) {
var f = a;
if (useB) f = b;
return f(x);
}
function a(uint x) returns (uint z) {
return x * x;
}
function b(uint x) returns (uint z) {
return 2 * x;
}
}
Calling ``select(false, x)`` will compute ``x * x`` and ``select(true, x)`` will compute ``2 * x``.
.. index:: optimizer, common subexpression elimination, constant propagation
*************************