import type { Nullable } from '@glimmer/interfaces';
import type { EndTag, StartTag } from '../parser';
import type { NodeVisitor } from '../traversal/visitor';
import type * as ASTv1 from '../v1/api';
import type * as HBS from '../v1/handlebars-ast';
import print from '../generation/print';
import * as src from '../source/api';
import traverse from '../traversal/traverse';
import Walker from '../traversal/walker';
import publicBuilder from '../v1/public-builders';
import { HandlebarsNodeVisitors } from './handlebars-node-visitors';
export declare class TokenizerEventHandlers extends HandlebarsNodeVisitors {
    private tagOpenLine;
    private tagOpenColumn;
    reset(): void;
    beginComment(): void;
    appendToCommentData(char: string): void;
    finishComment(): void;
    beginData(): void;
    appendToData(char: string): void;
    finishData(): void;
    tagOpen(): void;
    beginStartTag(): void;
    beginEndTag(): void;
    finishTag(): void;
    finishStartTag(): void;
    finishEndTag(isVoid: boolean): void;
    markTagAsSelfClosing(): void;
    appendToTagName(char: string): void;
    beginAttribute(): void;
    appendToAttributeName(char: string): void;
    beginAttributeValue(isQuoted: boolean): void;
    appendToAttributeValue(char: string): void;
    finishAttributeValue(): void;
    private parsePossibleBlockParams;
    reportSyntaxError(message: string): void;
    assembleConcatenatedValue(parts: (ASTv1.MustacheStatement | ASTv1.TextNode)[]): ASTv1.ConcatStatement;
    validateEndTag(tag: StartTag | EndTag, element: ASTv1.ParentNode, selfClosing: boolean): asserts element is ASTv1.ElementNode;
    assembleAttributeValue(parts: ASTv1.AttrPart[], isQuoted: boolean, isDynamic: boolean, span: src.SourceSpan): ASTv1.AttrValue;
}
/**
  ASTPlugins can make changes to the Glimmer template AST before
  compilation begins.
*/
export interface ASTPluginBuilder<TEnv extends ASTPluginEnvironment = ASTPluginEnvironment> {
    (env: TEnv): ASTPlugin;
}
export interface ASTPlugin {
    name: string;
    visitor: NodeVisitor;
}
export interface ASTPluginEnvironment {
    meta?: object | undefined;
    syntax: Syntax;
}
interface HandlebarsParseOptions {
    srcName?: string;
    ignoreStandalone?: boolean;
}
export interface TemplateIdFn {
    (src: string): Nullable<string>;
}
export interface PrecompileOptions extends PreprocessOptions {
    id?: TemplateIdFn;
    /**
     * Additional non-native keywords.
     *
     * Local variables (block params or lexical scope) always takes precedence,
     * but otherwise, suitable free variable candidates (e.g. those are not part
     * of a path) are matched against this list and turned into keywords.
     *
     * In strict mode compilation, keywords suppresses the undefined reference
     * error and will be resolved by the runtime environment.
     *
     * In loose mode, keywords are currently ignored and since all free variables
     * are already resolved by the runtime environment.
     */
    keywords?: readonly string[];
    /**
     * In loose mode, this hook allows embedding environments to customize the name of an
     * angle-bracket component. In practice, this means that `<HelloWorld />` in Ember is
     * compiled by Glimmer as an invocation of a component named `hello-world`.
     *
     * It's a little weird that this is needed in addition to the resolver, but it's a
     * classic-only feature and it seems fine to leave it alone for classic consumers.
     */
    customizeComponentName?: ((input: string) => string) | undefined;
}
export interface PrecompileOptionsWithLexicalScope extends PrecompileOptions {
    lexicalScope: (variable: string) => boolean;
    /**
     * If `emit.debugSymbols` is set to `true`, the name of lexical local variables
     * will be included in the wire format.
     */
    emit?: {
        debugSymbols?: boolean;
    } | undefined;
}
export interface PreprocessOptions {
    strictMode?: boolean | undefined;
    locals?: string[] | undefined;
    meta?: {
        moduleName?: string | undefined;
    } | undefined;
    plugins?: {
        ast?: ASTPluginBuilder[] | undefined;
    } | undefined;
    parseOptions?: HandlebarsParseOptions | undefined;
    customizeComponentName?: ((input: string) => string) | undefined;
    /**
      Useful for specifying a group of options together.
  
      When `'codemod'` we disable all whitespace control in handlebars
      (to preserve as much as possible) and we also avoid any
      escaping/unescaping of HTML entity codes.
     */
    mode?: 'codemod' | 'precompile' | undefined;
}
export interface Syntax {
    parse: typeof preprocess;
    builders: typeof publicBuilder;
    print: typeof print;
    traverse: typeof traverse;
    Walker: typeof Walker;
}
export declare function preprocess(input: string | src.Source | HBS.Program, options?: PreprocessOptions): ASTv1.Template;
export {};