⬅️ Back to Table of Contents

📄 interpolate.ts

📊 Analysis Summary

Metric	Count
🔧 Functions	2
📦 Imports	1

📚 Table of Contents

• Imports
• Functions

🛠️ File Location:

📂 packages/rule-tester/src/utils/interpolate.ts

📦 Imports

Name	Source
ReportDescriptorMessageData	@typescript-eslint/utils/ts-eslint

---

Functions

getPlaceholderMatcher(): RegExp

Code

export function getPlaceholderMatcher(): RegExp {
  return /\{\{([^{}]+)\}\}/gu;
}

• JSDoc:

  /**
   * Returns a global expression matching placeholders in messages.
   */
  

• Return Type: RegExp

interpolate(text: string, data: ReportDescriptorMessageData | undefined): string

Code

export function interpolate(
  text: string,
  data: ReportDescriptorMessageData | undefined,
): string {
  if (!data) {
    return text;
  }

  const matcher = getPlaceholderMatcher();

  // Substitution content for any {{ }} markers.
  return text.replace(matcher, (fullMatch, termWithWhitespace: string) => {
    const term = termWithWhitespace.trim();

    if (term in data) {
      return String(data[term]);
    }

    // Preserve old behavior: If parameter name not provided, don't replace it.
    return fullMatch;
  });
}

• Parameters:
• text: string
• data: ReportDescriptorMessageData | undefined
• Return Type: string
• Calls:
• getPlaceholderMatcher
• text.replace
• termWithWhitespace.trim
• String
• Internal Comments:

  // Substitution content for any {{ }} markers.
  // Preserve old behavior: If parameter name not provided, don't replace it.
  

---