Method readTokenInfo

internal/format/scanner.go:191–270

(n *ast.Node)

}

func (s *formattingScanner) readTokenInfo(n *ast.Node) tokenInfo {
	debug.Assert(s.isOnToken())

	// normally scanner returns the smallest available token
	// check the kind of context node to determine if scanner should have more greedy behavior and consume more text.

	var expectedScanAction scanAction
	if shouldRescanGreaterThanToken(n) {
		expectedScanAction = actionRescanGreaterThanToken
	} else if shouldRescanSlashToken(n) {
		expectedScanAction = actionRescanSlashToken
	} else if shouldRescanTemplateToken(n) {
		expectedScanAction = actionRescanTemplateToken
	} else if shouldRescanJsxIdentifier(n) {
		expectedScanAction = actionRescanJsxIdentifier
	} else if s.shouldRescanJsxText(n) {
		expectedScanAction = actionRescanJsxText
	} else if shouldRescanJsxAttributeValue(n) {
		expectedScanAction = actionRescanJsxAttributeValue
	} else {
		expectedScanAction = actionScan
	}

	if s.hasLastTokenInfo && expectedScanAction == s.lastScanAction {
		// readTokenInfo was called before with the same expected scan action.
		// No need to re-scan text, return existing 'lastTokenInfo'
		// it is ok to call fixTokenKind here since it does not affect
		// what portion of text is consumed. In contrast rescanning can change it,
		// i.e. for '>=' when originally scanner eats just one character
		// and rescanning forces it to consume more.
		s.lastTokenInfo = fixTokenKind(s.lastTokenInfo, n)
		return s.lastTokenInfo
	}

	if s.s.TokenFullStart() != s.savedPos {
		// readTokenInfo was called before but scan action differs - rescan text
		s.s.ResetTokenState(s.savedPos)
		s.s.Scan()
	}

	currentToken := s.getNextToken(n, expectedScanAction)

	token := NewTextRangeWithKind(
		s.s.TokenFullStart(),
		s.s.TokenEnd(),
		currentToken,
	)

	// consume trailing trivia
	s.trailingTrivia = nil
	for s.s.TokenFullStart() < s.endPos {
		currentToken = s.s.Scan()
		if !ast.IsTrivia(currentToken) {
			break
		}
		trivia := NewTextRangeWithKind(
			s.s.TokenFullStart(),
			s.s.TokenEnd(),