[[Property:title|Eiffel as an expression language]]
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A functional-programming style, or more generally a style involving more expressions and fewer instructions, is possible in Eiffel. In particular, the agent mechanism embeds a full functional-programming mechanism in the object-oriented framework of the language.

To make the notations simpler, a number of extensions have been proposed. They involve no fundamental new language mechanisms, but provide new, more concise notations for existing mechanisms. Examples are