calculate_replacements() — svelte Function Reference

Architecture documentation for the calculate_replacements() function in replace_in_code.js from the svelte codebase.

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Compiler→ Migrator→ calculate_replacements() — svelte Function Reference

Dependency Diagram

graph TD
  f0ba6afb_7305_48fb_a52f_c06b289193e5["calculate_replacements()"]
  76cde72f_b08b_6c0b_1e04_dda16a7ac104["replace_in_code.js"]
  f0ba6afb_7305_48fb_a52f_c06b289193e5 -->|defined in| 76cde72f_b08b_6c0b_1e04_dda16a7ac104
  e504078b_ad3f_7265_675b_c14b85115247["replace_in_code()"]
  e504078b_ad3f_7265_675b_c14b85115247 -->|calls| f0ba6afb_7305_48fb_a52f_c06b289193e5
  style f0ba6afb_7305_48fb_a52f_c06b289193e5 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

packages/svelte/src/compiler/preprocess/replace_in_code.js lines 24–40

function calculate_replacements(re, get_replacement, source) {
	/**
	 * @type {Array<Promise<Replacement>>}
	 */
	const replacements = [];
	source.replace(re, (...match) => {
		replacements.push(
			get_replacement(...match).then((replacement) => {
				const matched_string = match[0];
				const offset = match[match.length - 2];
				return { offset, length: matched_string.length, replacement };
			})
		);
		return '';
	});
	return Promise.all(replacements);
}