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- 'use strict';
- /**
- * Stringify a CST document, token, or collection item
- *
- * Fair warning: This applies no validation whatsoever, and
- * simply concatenates the sources in their logical order.
- */
- const stringify = (cst) => 'type' in cst ? stringifyToken(cst) : stringifyItem(cst);
- function stringifyToken(token) {
- switch (token.type) {
- case 'block-scalar': {
- let res = '';
- for (const tok of token.props)
- res += stringifyToken(tok);
- return res + token.source;
- }
- case 'block-map':
- case 'block-seq': {
- let res = '';
- for (const item of token.items)
- res += stringifyItem(item);
- return res;
- }
- case 'flow-collection': {
- let res = token.start.source;
- for (const item of token.items)
- res += stringifyItem(item);
- for (const st of token.end)
- res += st.source;
- return res;
- }
- case 'document': {
- let res = stringifyItem(token);
- if (token.end)
- for (const st of token.end)
- res += st.source;
- return res;
- }
- default: {
- let res = token.source;
- if ('end' in token && token.end)
- for (const st of token.end)
- res += st.source;
- return res;
- }
- }
- }
- function stringifyItem({ start, key, sep, value }) {
- let res = '';
- for (const st of start)
- res += st.source;
- if (key)
- res += stringifyToken(key);
- if (sep)
- for (const st of sep)
- res += st.source;
- if (value)
- res += stringifyToken(value);
- return res;
- }
- exports.stringify = stringify;
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