adapton

Macro let_memo

Source 
macro_rules! let_memo {
    { $var:ident = ( $thkvar1:ident ) = $rhs:expr; $body:expr } => { ... };
    { $var1:ident = ( $thkvar1:ident ) = $rhs1:expr ; $( $var2:ident = ( $thkvar2:ident ) = $rhs2:expr ),+ ; $body:expr} => { ... };
}
Expand description

Let-bind a nominal thunk, force it, and let-bind its result. Permits sequences of bindings.

Example usage and expansion: