There doesn't seem to be much support for supporting custom operators (see #818) in Rust. But what about calling normal binary functions as if they were operators, like haskell allows you to?

The syntax would be:

a `dot` b

to convey scalar product of two vectors a and b.

Another option suggested by @bluss:

a \dot b

Or if it possible without parsing conflicts (@thepowersgang: "but probably not dersirable"):

a dot b

Which is converted to

a.dot( b )

or, depending on the function:

dot( a, b )