Merge pull request #2177 from jches/export-codegen

more export codegen fixes

src/compile/Component.ts

@@ -820,29 +820,34 @@ export default class Component {
 							}
 
 							if (variable.export_name) {
-								if (variable.subscribable) {
-									coalesced_declarations.push({
-										kind: node.kind,
-										declarators: [declarator],
-										insert: get_insert(variable)
-									});
-									current_group = null;
-								} else {
 								if (current_group && current_group.kind !== node.kind) {
 									current_group = null;
 								}
 
-									if (!current_group) {
+								const insert = variable.subscribable
-										current_group = { kind: node.kind, declarators: [], insert: null };
+									? get_insert(variable)
+									: null;
+
+								if (!current_group || (current_group.insert && insert)) {
+									current_group = { kind: node.kind, declarators: [declarator], insert };
 									coalesced_declarations.push(current_group);
+								} else if (insert) {
+									current_group.insert = insert
+									current_group.declarators.push(declarator);
+								} else {
+									current_group.declarators.push(declarator);
 								}
 
-									current_group.declarators.push(declarator);
+								if (variable.name !== variable.export_name) {
+									code.prependRight(declarator.id.start, `${variable.export_name}:`)
 								}
 
 								if (next) {
 									const next_variable = component.var_lookup.get(next.id.name)
-									if (next_variable && !next_variable.export_name) {
+									const new_declaration = !next_variable.export_name
+										|| (current_group.insert && next_variable.subscribable)
+
+									if (new_declaration) {
 										code.overwrite(declarator.end, next.start, ` ${node.kind} `);
 									}
 								}
@@ -919,6 +924,11 @@ export default class Component {
 				const all_hoistable = node.declarations.every(d => {
 					if (!d.init) return false;
 					if (d.init.type !== 'Literal') return false;
+
+					const v = this.var_lookup.get(d.id.name)
+					if (v.reassigned) return false
+					if (v.export_name && v.export_name !== v.name) return false
+
 					if (this.var_lookup.get(d.id.name).reassigned) return false;
 					if (this.vars.find(variable => variable.name === d.id.name && variable.module)) return false;
 

test/runtime/samples/prop-exports/_config.js

@@ -0,0 +1,29 @@
+import { writable } from '../../../../store';
+
+export default {
+	props: {
+    s1: writable(42),
+    s2: writable(43),
+    p1: 2,
+    p3: 3,
+    a1: writable(1),
+    a2: 4,
+    a6: writable(29),
+    for: 'loop',
+    continue: '...',
+	},
+
+	html: `
+    $s1=42
+    $s2=43
+    p1=2
+    p3=3
+    $v1=1
+    v2=4
+    vi1=4
+    $vs1=1
+    vl1=test
+    $s3=29
+    loop...
+  `
+}

test/runtime/samples/prop-exports/main.svelte

@@ -0,0 +1,46 @@
+<script>
+  // export multiple subscribables in one line
+  export let u1, s1, u2, s2
+
+  let p1, p2, p3
+
+  // export previously declared props
+  export { p1, p3 }
+
+  // aliased props <component a1={...} a2={...}> assign to v1, v2
+  let v1, v2
+  export { v1 as a1, v2 as a2 }
+
+  // aliased export with initializer
+  let vi1 = v2
+  export { vi1 as a3 }
+
+  // aliased subscribable export
+  let vs1 = v1
+  export { vs1 as a4 }
+
+  // aliased with literal initializer
+  let vl1 = 'test'
+  export { vl1 as a5 }
+
+  // aliased store surrounded by non-aliased non-stores
+  let n1, n2, s3
+  export { n1, s3 as a6, n2 }
+
+  // keyword exports
+  let k1, k2
+  export { k1 as for, k2 as continue }
+
+</script>
+
+$s1={$s1}
+$s2={$s2}
+p1={p1}
+p3={p3}
+$v1={$v1}
+v2={v2}
+vi1={vi1}
+$vs1={$vs1}
+vl1={vl1}
+$s3={$s3}
+{k1}{k2}