lhs:rhs
. These expressions are used to define something in
Pico. Hence, the tree needs 2 children: left-hand-side being defined (in Pico
this is called the invocation, and can be v:...
, t[23]:...
or f(x,y):...
) and the right-hand-side being the initial value. The
invocation can be accessed using the DEF_INV_idx
. The initial value
expression is accessed through DEF_EXP_idx
.