Christopher Chedeau
3375cfe605
* new_tests * move_all_clobbered_tests * remove all the tests that no longer exist * re-run flow tests * Move all the flow tests to tests/flow and prettier to tests/ * Move prettier tests to their own folders * Add jsfmt files * run prettier snapshot tests
155 lines
2.3 KiB
JavaScript
155 lines
2.3 KiB
JavaScript
/***
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* test initialization tracking of hoisted stuff
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* @flow
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*/
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// for illustrative purposes only - Flow considers a throw possible
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// anywhere within a block
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function might_throw() {}
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// local use of annotated var within try is ok
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function f() {
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try {
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var x:number = 0;
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var y:number = x;
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} catch (e) {
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}
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}
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// and within catch
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function f() {
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try {
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} catch (e) {
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var x:number = 0;
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var y:number = x;
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}
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}
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// but not across try/catch
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function f() {
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try {
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might_throw();
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var x:number = 0;
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} catch (e) {
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var y:number = x; // error
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}
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}
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// or try/finally
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function f() {
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try {
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might_throw();
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var x:number = 0;
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} finally {
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var y:number = x; // error
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}
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}
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// or catch/finally
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function f() {
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try {
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} catch (e) {
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var x:number = 0;
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} finally {
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var y:number = x; // error
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}
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}
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// or try/catch/finally if init doesn't dominate
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function f() {
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try {
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var x:number = 0;
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} catch (e) {
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might_throw();
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var x:number = 0;
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} finally {
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var y:number = x; // error
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}
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}
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// post-use ok because init dominates here
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function f() {
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try {
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var x:number = 0;
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} catch (e) {
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might_throw(); // ...but if so, suffix is not reached
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var x:number = 0;
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}
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var y:number = x;
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}
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// and here
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function f() {
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try {
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} catch (e) {
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} finally {
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might_throw(); // ...but if so, suffix is not reached
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var x:number = 0;
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}
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var y:number = x;
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}
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// and here
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function f() {
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try {
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var x:number;
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} catch (e) {
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} finally {
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might_throw(); // ...but if so, suffix is not reached
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x = 0;
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}
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var y:number = x;
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}
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// and here, thank you JS for the wonder that is hoisting
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function f() {
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try {
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} catch (e) {
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var x:number;
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} finally {
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might_throw(); // ...but if so, suffix is not reached
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x = 0;
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}
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var y:number = x;
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}
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// error if used prior to init
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function f() {
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var y:number = x; // error
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try {
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var x:number = 0;
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} catch (e) {
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}
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}
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// another non-dominated post
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function f() {
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try {
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var x:number = 0;
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} catch (e) {
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}
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var y:number = x; // error
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}
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// ditto
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function f() {
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try {
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} catch (e) {
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var x:number = 0;
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}
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var y:number = x; // error
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}
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// ditto
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function f(b) {
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try {
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var x:number;
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if (b) {
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throw new Error();
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}
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x = 0;
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} catch (e) {
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}
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var y:number = x; // error
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}
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