Function extendAST

packages/effect/src/Schema.ts:3306–3307

(x: AST.AST, y: AST.AST, path: ReadonlyArray<PropertyKey>)

  asts.map((ast) => new AST.Refinement(ast, refinement.filter, preserveRefinementAnnotations(refinement)))

const extendAST = (x: AST.AST, y: AST.AST, path: ReadonlyArray<PropertyKey>): AST.AST =>
  AST.Union.make(intersectUnionMembers([x], [y], path))

const getTypes = (ast: AST.AST): ReadonlyArray<AST.AST> => AST.isUnion(ast) ? ast.types : [ast]