# All files / src/generator export.js

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     // @flow
    import { GLOBAL_INDEX, FUNCTION_INDEX } from '../semantics/metadata';
    import {
      EXTERN_GLOBAL,
      EXTERN_MEMORY,
      EXTERN_TABLE,
      EXTERN_FUNCTION,
    } from '../emitter/external_kind';
    import type { NodeType, IntermediateExportType } from './flow/types';

    const externaKindMap = {
      Memory: EXTERN_MEMORY,
      Table: EXTERN_TABLE,
    };

    export default function generateExport(node: NodeType): IntermediateExportType {
      const functionIndexMeta = node.meta[FUNCTION_INDEX];
      const globalIndexMeta = node.meta[GLOBAL_INDEX];

      if (globalIndexMeta != null) {
        const kind = externaKindMap[String(node.type)] || EXTERN_GLOBAL;
        const index = [EXTERN_MEMORY, EXTERN_TABLE].includes(kind)
          ? 0
          : globalIndexMeta;
        return {
          index,
          kind,
          field: node.value,
        };
      }

      return {
        index: functionIndexMeta,
        kind: EXTERN_FUNCTION,
        field: node.value,
      };
    }