{
  "version": 3,
  "sources": ["../../../src/optimizer/transforms/alternation-to-class.ts"],
  "sourcesContent": ["import type {AlternativeNode, CharacterClassNode, CharacterNode, CharacterSetNode, NodeCharacterSetKind} from '../../parser/parse.js';\nimport type {Visitor} from '../../traverser/traverse.js';\nimport {isAlternativeContainer} from '../../parser/node-utils.js';\nimport {createAlternative, createCharacterClass} from '../../parser/parse.js';\n\n/**\nUse character classes for adjacent alternatives with single-length values.\n*/\nconst alternationToClass: Visitor = {\n  '*'({node}) {\n    if (!isAlternativeContainer(node) || node.body.length < 2) {\n      return;\n    }\n    const newAlts = [];\n    let ccNodes = [];\n    for (const alt of node.body) {\n      const kid = alt.body[0];\n      if (\n        alt.body.length === 1 &&\n        ( kid.type === 'Character' ||\n          kid.type === 'CharacterClass' ||\n          (kid.type === 'CharacterSet' && universalCharacterSetKinds.has(kid.kind))\n        )\n      ) {\n        ccNodes.push(kid);\n      } else {\n        if (ccNodes.length) {\n          newAlts.push(createAlternativeWithCombinedNodes(ccNodes));\n          ccNodes = [];\n        }\n        newAlts.push(alt);\n      }\n    }\n    if (ccNodes.length) {\n      newAlts.push(createAlternativeWithCombinedNodes(ccNodes));\n    }\n    node.body = newAlts;\n  },\n};\n\nfunction createAlternativeWithCombinedNodes(nodes: Array<CharacterNode | CharacterClassNode | CharacterSetNode>): AlternativeNode {\n  const alt = createAlternative();\n  const node = nodes.length > 1 ? createCharacterClass({body: nodes}) : nodes[0];\n  if (node) {\n    alt.body.push(node);\n  }\n  return alt;\n}\n\n// Character set kinds that can appear inside and outside of character classes, and can be inverted\n// by setting `negate`. Some but not all of those excluded use `variableLength: true`\nconst universalCharacterSetKinds = new Set<NodeCharacterSetKind>([\n  'digit',\n  'hex',\n  'posix',\n  'property',\n  'space',\n  'word',\n]);\n\nexport {\n  alternationToClass,\n};\n"],
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  "names": ["isAlternativeContainer", "createAlternative", "createCharacterClass", "alternationToClass", "node", "newAlts", "ccNodes", "alt", "kid", "universalCharacterSetKinds", "createAlternativeWithCombinedNodes", "nodes"]
}