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28 lines
935 B
JavaScript
28 lines
935 B
JavaScript
// @flow
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import type {Type} from './types.js';
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import type ParsingContext from './parsing_context.js';
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import type EvaluationContext from './evaluation_context.js';
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export type SerializedExpression = Array<mixed> | Array<string> | string | number | boolean | null;
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export interface Expression {
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+type: Type;
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evaluate(ctx: EvaluationContext): any;
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eachChild(fn: Expression => void): void;
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/**
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* Statically analyze the expression, attempting to enumerate possible outputs. Returns
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* false if the complete set of outputs is statically undecidable, otherwise true.
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*/
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outputDefined(): boolean;
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serialize(): SerializedExpression;
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}
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export type ExpressionParser = (args: $ReadOnlyArray<mixed>, context: ParsingContext) => ?Expression;
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export type ExpressionRegistration = Class<Expression> & { +parse: ExpressionParser };
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export type ExpressionRegistry = {[_: string]: ExpressionRegistration};
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