This file provides a list of the token types the language needs to support.

Notes on the initial version of lab4.lex
----------------------------------------

In the starter lab4.lex file, the following tokens have not yet been implemented:
   STRLIT, OROP, ANDOP, NOTOP, LTOP, FUNDEF, READCTRL
(all but STRLIT are simple hard-coded tokens).

The STRLIT token begins with a ", contains one or more non-"s, then ends with a ".


Hard-coded token types
----------------------
"|"                    OROP
"&"                    ANDOP
"!"                    NOTOP
"+"                    ADDOP
"-"                    SUBOP
"*"                    MULOP
"/"                    DIVOP
"="                    EQOP
"<"                    LTOP
":="                   SETOP
"["                    OPENBR
"]"                    CLOSEBR
"IF"                   IFCTRL
"READ"                 READCTRL
"PRINT"                PRTCTRL
"VAR"                  VARDEF
"ARRAY"                ARRDEF
"FUNCTION"             FUNDEF
"INTEGER"              INTTYPE
"STRING"               STRTYPE
"REAL"                 REALTYPE

Regex tokens*
-------------
digits.digits          REALLIT
digits                 INTLIT
alphas                 IDENT
quote non-quotes quote STRLIT
* the 'regexes' shown are descriptive, not syntactically valid lex