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/**
* 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;
}
export { stringify };
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