- Add a instruction value that contains the encoding, the address and a
flag to indicate if this instruction contains label references
- Add label value that contains an address
- Add reference value that contains offset, an absolute address and an
operand size
- define types for all value options in the union
- define accessor functions for all the values in the union
Before it kept track of a more specific node that referenced the symbol
in some way. Now it will only keep track of the actual label defining
statements. This is done to facilitate encoding. The encoder can now go
from a symbol name to the statement that defines the symbol.
Restructure the encoder to deal with this and pass the correct statement
to the symbol update function.
The linked list is doubly linked so the parser can look forward into it
and error reporting can look backward.
This commmit also reworks main to use the tokenlist instead of dealing
with the lexer manually.
