/**
 * Which runtime a Web program carries, and which of the compiler's own helpers
 * a Web lowering replaces.
 *
 * D115 P4 R3d: every one of these is a seam `JavaScriptEmitter` already asks
 * about — "does this module need the file-type helper", "what does an `is`
 * check on `Element` compile to" — so the family answers for Web and leaves the
 * base's answer to the host, which is the one thing a collaborator cannot call
 * for itself.
 */
import type { Expression, ValueType } from "@velarscript/compiler/extension";
import { type WebLookEntry as LookEntry } from "../ast.ts";
/**
 * What runtime-import selection reads on the emitter, plus the four base-class
 * answers a collaborator has no `super` of its own to ask for. `webOutput` and
 * the two `needs…` flags are live: `emitTypeCheck` sets one while statements
 * are still being emitted, and `additionalHelpers` reads it afterwards.
 */
export interface RuntimeImportHost {
    readonly lookKeywordProperties: ReadonlySet<string>;
    needsFileTypeHelper: boolean;
    readonly needsLookArithmeticRuntime: boolean;
    readonly webOutput: boolean;
    baseDetachedTaskHelpers(): readonly string[];
    baseIsCheck(type: ValueType, value: string): string;
    baseReactiveBridgeHelpers(needsJavaScriptCallBoundary: boolean, needsCollections: boolean, usedIdentifiers: ReadonlySet<string>): readonly string[];
    baseTypeCheck(type: ValueType, value: string, state: string): string;
    requireRuntimeModule(source: string): void;
    usesSharedRuntimeModules(): boolean;
}
export declare function emitTypeCheck(host: RuntimeImportHost, type: ValueType, value: string, state: string): string;
export declare function emitIsCheck(host: RuntimeImportHost, type: ValueType, value: string): string;
export declare function additionalHelpers(host: RuntimeImportHost): readonly string[];
export declare function reactiveBridgeHelpers(host: RuntimeImportHost, needsJavaScriptCallBoundary: boolean, needsCollections: boolean, usedIdentifiers: ReadonlySet<string>): readonly string[];
export declare function includesErrorNormalizationRuntime(host: RuntimeImportHost): boolean;
export declare function detachedTaskHelpers(host: RuntimeImportHost): readonly string[];
export declare function visitLookExpressions(entries: readonly LookEntry[], visit: (expression: Expression) => void): void;
export declare function containsUnitLiteral(value: unknown): boolean;
export declare function containsWebSyntax(value: unknown): boolean;
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