I found this reason to use a DSL today, and it is the best reason to use a DSL I have heard of so far.
"DSL allows business people to read through code and understand what is going on, so they can spot misinterpreted requirements."
I wonder if it is true in practice?
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I've read the text of a DSL out to a business person - not quite the business person reading the code, but close enough.
More often though, I use a DSL so *I* can read it :)
For example, my tests for a file management tool use a DSL for test data, that reads like:
TestDirBuilder.construct("root") do
dir "parent" do
dir "child" do
file "grandchild", "12345"
end
dir "emptychild"
end
end
somewhat more readable, by *me*, than building it in code!
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