/**
 * What a value is, seen as a response: the shapes `velar/serve` builds, the
 * predicates that decide whether a route may return one, and the two
 * constructors that carry a response's compile-time metadata alongside it.
 *
 * D115 P4 R4a. `Data` is the recursive half — a record whose every field is
 * itself Data — and it is asked here rather than in the analyzer because the
 * intrinsics, the handlers and the OpenAPI derivation all ask it, and one
 * question answered in three places is how three answers start to differ.
 */
import { type CompilerIntrinsicAnalysisContext, type ValueType } from "@velarscript/compiler/extension";
import { type RouteParameterKind } from "../contracts.ts";
export declare function literalStatus(expression: ReturnType<CompilerIntrinsicAnalysisContext["argumentAt"]>, fallback: number): number | null;
export declare function nodeResponseValue(body: "json" | "text" | "stream", value: ValueType, status: number | null, contentType: string): ValueType;
export declare function nodeOutcomeValue(value: ValueType, status: number | null): ValueType;
export declare function scalarKind(type: ValueType): Extract<RouteParameterKind, "string" | "number" | "bool" | "enum" | "list"> | null;
export declare function isNamedDataRecord(type: ValueType, fieldsOf: (identity: string) => ReadonlyMap<string, ValueType> | null, seen: ReadonlySet<string>): boolean;
export declare function isResponseShape(type: ValueType): boolean;
export declare function requireResponseValue(context: CompilerIntrinsicAnalysisContext, type: ValueType, span: Parameters<CompilerIntrinsicAnalysisContext["typeError"]>[1]): void;
export declare function isRouteResult(type: ValueType, fieldsOf: (identity: string) => ReadonlyMap<string, ValueType> | null, seen: ReadonlySet<string>): boolean;
/**
 * 响应策略是语义结果到最终表示的最后一步，因此不能再返回一个 HttpOutcome；
 * 否则会形成第二轮策略选择，并让“只编码一次”的边界变得含糊。
 */
export declare function isResponsePolicyResult(type: ValueType, fieldsOf: (identity: string) => ReadonlyMap<string, ValueType> | null, seen: ReadonlySet<string>): boolean;
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