BindingPower

const BindingPower: {
  Assignment: 10;
  BitwiseAnd: 22;
  BitwiseOr: 18;
  BitwiseXor: 20;
  Call: 80;
  Comparison: 23;
  Conditional: 24;
  Conjunction: 16;
  Exponent: 50;
  LogicalAnd: 14;
  LogicalOr: 12;
  Lowest: 0;
  Postfix: 70;
  Prefix: 60;
  Product: 40;
  Shift: 27;
  Sum: 30;
  Uncertainty: 45;
};

Defined in: packages/engine/src/parser/BindingPower.ts:12

Named precedence levels for the Pratt parser, from loosest (Lowest) to tightest (Call) binding. A custom infix parselet compares its own binding power against the current expression’s to decide whether to consume the next operator (higher power binds tighter, e.g. * over +).

Package authors reference these when declaring an infix parselet in a package’s infixParselets. See the built-in packages for examples of picking an appropriate level (e.g. arithmetic +/- use Sum, *// use Product).

Type Declaration

Assignment

readonly Assignment: 10 = 10;

BitwiseAnd

readonly BitwiseAnd: 22 = 22;

BitwiseOr

readonly BitwiseOr: 18 = 18;

BitwiseXor

readonly BitwiseXor: 20 = 20;

Call

readonly Call: 80 = 80;

Comparison

readonly Comparison: 23 = 23;

Conditional

readonly Conditional: 24 = 24;

Conjunction

readonly Conjunction: 16 = 16;

Exponent

readonly Exponent: 50 = 50;

LogicalAnd

readonly LogicalAnd: 14 = 14;

LogicalOr

readonly LogicalOr: 12 = 12;

Lowest

readonly Lowest: 0 = 0;

Postfix

readonly Postfix: 70 = 70;

Prefix

readonly Prefix: 60 = 60;

Product

readonly Product: 40 = 40;

Shift

readonly Shift: 27 = 27;

Sum

readonly Sum: 30 = 30;

Uncertainty

readonly Uncertainty: 45 = 45;