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Make note of list indexing in Hocon.md

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Ryan O'Neill 2015-05-04 14:43:49 -07:00
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HOCON.md
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@ -1025,6 +1025,19 @@ Then the `${x}` in "foo.conf", which has been fixed up to
`${a.x}`, would evaluate to `42` rather than to `10`.
Substitution happens _after_ parsing the whole configuration.
Includes inside of lists use the list index as a path segment when
fixing up substitutions.
Example:
{
a : [ { include "foo.conf" } ]
a.0.x : 42
}
Since the `${x}` in "foo.conf" would be fixed up to `${a.0.x}' we
get our expected value of 42.
However, there are plenty of cases where the included file might
intend to refer to the application's root config. For example, to
get a value from a system property or from the reference