You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
63 lines
1.8 KiB
63 lines
1.8 KiB
'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;
|
|
|