Hands-On Design Patterns and Best Practices with Julia

Using QuoteNode for symbols

Symbols are quite special when they appear in expressions. They may appear in the head node of an expression object—for example, the = symbol in a variable assignment expression. They may also appear in the arguments of an expression object, in which case they would represent a variable:

Since symbols are already used to represent variables, how would we assign an actual symbol to a variable? To figure out how this works, we can use the same trick that we have learned so far—using the dump function to examine the expression object for such a statement:

As we can see, an actual symbol must be enclosed in a QuoteNode ...