Skip to main content

Type Alias: Ast

type Ast = 
  | {
  k: "lit";
  o: number;
  v: string | number | boolean | null;
}
  | {
  k: "ref";
  meta: boolean;
  o: number;
  path: RefSegment[];
  root: boolean;
  up: number;
}
  | {
  k: "dot";
  o: number;
}
  | {
  k: "col";
  name: string;
  o: number;
}
  | {
  a: Ast;
  k: "un";
  o: number;
  op: UnaryOp;
}
  | {
  a: Ast;
  b: Ast;
  k: "bin";
  o: number;
  op: BinaryOp;
}
  | {
  a: Ast;
  b: Ast;
  k: "cond";
  o: number;
  test: Ast;
}
  | {
  args: Ast[];
  k: "call";
  name: string;
  o: number;
}
  | {
  items: Ast[];
  k: "arr";
  o: number;
}
  | {
  a: Ast;
  k: "member";
  name: string;
  o: number;
}
  | {
  a: Ast;
  i: Ast;
  k: "index";
  o: number;
};

Defined in: packages/core/src/expr/ast.ts:33

Union Members​

Type Literal​

{
  k: "lit";
  o: number;
  v: string | number | boolean | null;
}

Literal: number, string, boolean or null.

Type Literal​

{
  k: "ref";
  meta: boolean;
  o: number;
  path: RefSegment[];
  root: boolean;
  up: number;
}

${…} reference. up = number of ../ hops; root = leading /.

Type Literal​

{
  k: "dot";
  o: number;
}

. — the owner element's own value.

Type Literal​

{
  k: "col";
  name: string;
  o: number;
}

Bare identifier naming a choice column (legal in choiceFilter only).

Type Literal​

{
  a: Ast;
  k: "un";
  o: number;
  op: UnaryOp;
}

Type Literal​

{
  a: Ast;
  b: Ast;
  k: "bin";
  o: number;
  op: BinaryOp;
}

Type Literal​

{
  a: Ast;
  b: Ast;
  k: "cond";
  o: number;
  test: Ast;
}

Type Literal​

{
  args: Ast[];
  k: "call";
  name: string;
  o: number;
}

Type Literal​

{
  items: Ast[];
  k: "arr";
  o: number;
}

Type Literal​

{
  a: Ast;
  k: "member";
  name: string;
  o: number;
}

expr.key — static member access on an object value.

Type Literal​

{
  a: Ast;
  i: Ast;
  k: "index";
  o: number;
}

expr[i] — dynamic index (1-based for repeat collections).