# PathAst.QueryParams

A collection of declared query-parameter AST nodes.

## Signatures

```ts
type QueryParams = {
    type: "query-params";
    value: ReadonlyArray<PathAst.QueryParam>;
};
```

## Why

Only declared query keys participate in matching and decoding; undeclared keys are ignored.

## Ownership and lifetime

`QueryParams` describes plain readonly AST data. Routes and Matchers retain the concrete nodes they receive by reference; the type itself owns no resource.

## Property: type

Discriminates the query-declaration collection.

## Property: type: Why

Query parsing begins only for explicitly declared query nodes.

## Property: type: Ownership and lifetime

The literal tag is retained with this plain node and owns no URL state.

## Property: value

Query declarations in source order.

## Property: value: Why

Formatting and schema-field derivation preserve declaration order.

## Property: value: Ownership and lifetime

The node retains the supplied readonly array by reference; callers must not mutate it after
constructing the AST.