/**
 * Predicate union-narrowing guard emission for if-statements.
 * Handles predicate guards (`if (isUser(account)) { ... }`).
 */
import { IrStatement } from "@tsonic/frontend";
import { EmitterContext } from "../../../types.js";
import type { CSharpStatementAst } from "../../../core/format/backend-ast/types.js";
type IfStatement = Extract<IrStatement, {
    kind: "ifStatement";
}>;
type GuardResult = [readonly CSharpStatementAst[], EmitterContext] | undefined;
/**
 * Try to emit a predicate guard narrowing for `if (isUser(account)) { ... }`.
 * Returns undefined if the condition is not a matching predicate call.
 */
export declare const tryEmitPredicateGuard: (stmt: IfStatement, context: EmitterContext) => GuardResult;
export {};
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