Christopher Chedeau
cf45afba61
- This brings in the flow test suite that contains a ton of JavaScript parsing edge cases - This creates snapshot tests using the pretty printer for all of them - If uncomment `RUN_AST_TESTS` line in `tests/run_specs.js`, it checks ast(pretty_print(x)) == ast(x). Right now, "178 failed, 197 passed, 375 of 377 total". So half of the tests are not passing, most of them are crashes and many of the rest are subtle issues.
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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