/**
 * Verb for SubstitutionTracker.add()
 */
export declare enum SubstitutionUse {
    /** outputs this marker into context (e.g. transform to= or key to=) */
    emit = 0,
    /** consumes this marker out of the context (e.g. transform from=) */
    consume = 1,
    /** matches the marker, but doesn't consume (e.g. display to=) */
    match = 2,
    /** variable definition: might consume, emit, or match. */
    variable = 3
}
type SubstitutionSet = Set<string>;
/** Tracks usage of markers */
export declare class SubstitutionTracker {
    /** markers that were emitted */
    emitted: SubstitutionSet;
    /** markers that were consumed and removed from the context */
    consumed: SubstitutionSet;
    /** markers that were matched, but not necessarily consumed */
    matched: SubstitutionSet;
    /** all markers */
    all: SubstitutionSet;
    constructor();
    /**
     *
     * @param verb what kind of use we are adding
     * @param markers list of substitutions to add
     */
    add(verb: SubstitutionUse, markers: string[]): void;
}
/** rollup of several substitution types */
export declare class Substitutions {
    addSetAndStringSubtitution(verb: SubstitutionUse, str?: string): void;
    /** add a string that can have string var substitutions or markers */
    addStringAndMarkerSubstitution(verb: SubstitutionUse, str?: string): void;
    addStringSubstitution(verb: SubstitutionUse, str?: string): void;
    /** add a string that's just markers */
    addMarkers(verb: SubstitutionUse, str?: string): void;
    markers: SubstitutionTracker;
    badMarkers: Set<string>;
    set: SubstitutionTracker;
    string: SubstitutionTracker;
    uset: SubstitutionTracker;
    constructor();
}
export {};
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