Docs

1 files changed, 78 insertions, 0 deletions

diff --git a/node_modules/browserslist/parse.js b/node_modules/browserslist/parse.js
new file mode 100644
index 0000000..56b534a
--- /dev/null
+++ b/node_modules/browserslist/parse.js
@@ -0,0 +1,78 @@
+var AND_REGEXP = /^\s+and\s+(.*)/i
+var OR_REGEXP = /^(?:,\s*|\s+or\s+)(.*)/i
+
+function flatten(array) {
+  if (!Array.isArray(array)) return [array]
+  return array.reduce(function (a, b) {
+    return a.concat(flatten(b))
+  }, [])
+}
+
+function find(string, predicate) {
+  for (var n = 1, max = string.length; n <= max; n++) {
+    var parsed = string.substr(-n, n)
+    if (predicate(parsed, n, max)) {
+      return string.slice(0, -n)
+    }
+  }
+  return ''
+}
+
+function matchQuery(all, query) {
+  var node = { query: query }
+  if (query.indexOf('not ') === 0) {
+    node.not = true
+    query = query.slice(4)
+  }
+
+  for (var name in all) {
+    var type = all[name]
+    var match = query.match(type.regexp)
+    if (match) {
+      node.type = name
+      for (var i = 0; i < type.matches.length; i++) {
+        node[type.matches[i]] = match[i + 1]
+      }
+      return node
+    }
+  }
+
+  node.type = 'unknown'
+  return node
+}
+
+function matchBlock(all, string, qs) {
+  var node
+  return find(string, function (parsed, n, max) {
+    if (AND_REGEXP.test(parsed)) {
+      node = matchQuery(all, parsed.match(AND_REGEXP)[1])
+      node.compose = 'and'
+      qs.unshift(node)
+      return true
+    } else if (OR_REGEXP.test(parsed)) {
+      node = matchQuery(all, parsed.match(OR_REGEXP)[1])
+      node.compose = 'or'
+      qs.unshift(node)
+      return true
+    } else if (n === max) {
+      node = matchQuery(all, parsed.trim())
+      node.compose = 'or'
+      qs.unshift(node)
+      return true
+    }
+    return false
+  })
+}
+
+module.exports = function parse(all, queries) {
+  if (!Array.isArray(queries)) queries = [queries]
+  return flatten(
+    queries.map(function (block) {
+      var qs = []
+      do {
+        block = matchBlock(all, block, qs)
+      } while (block)
+      return qs
+    })
+  )
+}