Operators

Operators

The lexer recognizes operators such as:

+ - * / % = == != > >= < <=

The parser determines how these operators are structured.

Operator precedence

Conceptually, NXL parses expressions through these precedence levels:

assignment
    │
    ▼
logical OR
    │
    ▼
logical AND
    │
    ▼
equality
    │
    ▼
comparison
    │
    ▼
term
    │
    ▼
factor
    │
    ▼
unary
    │
    ▼
call
    │
    ▼
primary

For:

let result = a + b * 2

the AST is:

      +
     /     a   *
       /       b   2

Therefore b * 2 is evaluated first, producing:

a + (b * 2)

This is handled by the parser, not the lexer. The lexer only identifies the individual tokens.