The Abstract Truth

While reading a computer manual today, I came across the following:

When comparing objects, six different predicates can be useful: smaller, smaller or equal, equal, not equal, greater or equal, and greater. However, defining all of them is fastidious, especially since four out of these six can be expressed using the remaining two.

I have never seen fastidious used in the way, and I don’t think it’s right.

Answers.com defines fastidious as:

fas·tid·i·ous (fă-stĭd’ē-əs, fə-) adj.
1. Possessing or displaying careful, meticulous attention to detail.
2. Difficult to please; exacting.
3. Excessively scrupulous or sensitive, especially in matters of taste or propriety. See synonyms at meticulous.

A person can be fastidious, but I don’t think it can be used as an adjective for defining.