analyze_module() — svelte Function Reference

Architecture documentation for the analyze_module() function in index.js from the svelte codebase.

Function javascript Compiler Transformer calls 9 called by 1

Entity Profile

Compiler→ Transformer→ analyze_module() — svelte Function Reference

Dependency Diagram

graph TD
  05334dc2_42b5_e2cb_fe55_aa3f6a2de9df["analyze_module()"]
  4aa8a188_84d4_0274_ed83_cac0ab1d3572["index.js"]
  05334dc2_42b5_e2cb_fe55_aa3f6a2de9df -->|defined in| 4aa8a188_84d4_0274_ed83_cac0ab1d3572
  39054977_bbc9_e3d5_4935_6918741df7be["compileModule()"]
  39054977_bbc9_e3d5_4935_6918741df7be -->|calls| 05334dc2_42b5_e2cb_fe55_aa3f6a2de9df
  3c435eeb_8c73_85a6_1db6_39a90111f42e["set_source()"]
  05334dc2_42b5_e2cb_fe55_aa3f6a2de9df -->|calls| 3c435eeb_8c73_85a6_1db6_39a90111f42e
  f47134ed_b840_afa5_bf63_d93768eb2045["parse()"]
  05334dc2_42b5_e2cb_fe55_aa3f6a2de9df -->|calls| f47134ed_b840_afa5_bf63_d93768eb2045
  c531899f_2ddc_b054_bfe1_2cfdfd2b1c7f["create_scopes()"]
  05334dc2_42b5_e2cb_fe55_aa3f6a2de9df -->|calls| c531899f_2ddc_b054_bfe1_2cfdfd2b1c7f
  14aee6bc_58b8_9da9_3853_23ecd1ef30fe["global_reference_invalid()"]
  05334dc2_42b5_e2cb_fe55_aa3f6a2de9df -->|calls| 14aee6bc_58b8_9da9_3853_23ecd1ef30fe
  627dc2f8_4dbc_5bb1_8f54_cee503e17098["get()"]
  05334dc2_42b5_e2cb_fe55_aa3f6a2de9df -->|calls| 627dc2f8_4dbc_5bb1_8f54_cee503e17098
  96840921_f43d_a26b_1d2e_cd28c0fd6d73["is_rune()"]
  05334dc2_42b5_e2cb_fe55_aa3f6a2de9df -->|calls| 96840921_f43d_a26b_1d2e_cd28c0fd6d73
  184f48cb_76c9_9db4_9fd7_3c5e91a5b286["store_invalid_subscription_module()"]
  05334dc2_42b5_e2cb_fe55_aa3f6a2de9df -->|calls| 184f48cb_76c9_9db4_9fd7_3c5e91a5b286
  784480d0_767d_ac40_b03e_ae8ddcc82684["Set()"]
  05334dc2_42b5_e2cb_fe55_aa3f6a2de9df -->|calls| 784480d0_767d_ac40_b03e_ae8ddcc82684
  235c8d25_76a1_8477_bb76_fbb408b6a46d["adjust()"]
  05334dc2_42b5_e2cb_fe55_aa3f6a2de9df -->|calls| 235c8d25_76a1_8477_bb76_fbb408b6a46d
  style 05334dc2_42b5_e2cb_fe55_aa3f6a2de9df fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

packages/svelte/src/compiler/phases/2-analyze/index.js lines 256–322

export function analyze_module(source, options) {
	/** @type {AST.JSComment[]} */
	const comments = [];

	state.set_source(source);
	const ast = parse(source, comments, false, false);

	const { scope, scopes, has_await } = create_scopes(ast, new ScopeRoot(), false, null);

	for (const [name, references] of scope.references) {
		if (name[0] !== '$' || RESERVED.includes(name)) continue;
		if (name === '$' || name[1] === '$') {
			e.global_reference_invalid(references[0].node, name);
		}

		const binding = scope.get(name.slice(1));

		if (binding !== null && !is_rune(name)) {
			e.store_invalid_subscription_module(references[0].node);
		}
	}

	/** @type {Analysis} */
	const analysis = {
		module: { ast, scope, scopes, has_await },
		name: options.filename,
		accessors: false,
		runes: true,
		immutable: true,
		tracing: false,
		async_deriveds: new Set(),
		comments,
		classes: new Map(),
		pickled_awaits: new Set()
	};

	state.adjust({
		dev: options.dev,
		rootDir: options.rootDir,
		runes: true
	});

	walk(
		/** @type {ESTree.Node} */ (ast),
		{
			scope,
			scopes,
			analysis: /** @type {ComponentAnalysis} */ (analysis),
			state_fields: new Map(),
			// TODO the following are not needed for modules, but we have to pass them in order to avoid type error,
			// and reducing the type would result in a lot of tedious type casts elsewhere - find a good solution one day
			ast_type: /** @type {any} */ (null),
			component_slots: /** @type {Set<string>} */ (new Set()),
			expression: null,
			function_depth: 0,
			has_props_rune: false,
			options: /** @type {ValidatedCompileOptions} */ (options),
			fragment: null,
			parent_element: null,
			reactive_statement: null,
			derived_function_depth: -1
		},
		visitors
	);

	return analysis;
}