155 lines
2.5 KiB
JavaScript
155 lines
2.5 KiB
JavaScript
var null_tests =
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[
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// expr != null
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function() {
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var x : ?string = "xxx";
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if (x != null) {
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var y : string = x; // ok
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}
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},
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function() {
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var x : ?string = "xxx";
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if (null != x) {
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var y : string = x; // ok
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}
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},
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function() {
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var x : {p:?string} = {p:"xxx"};
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if (x.p != null) {
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var y : string = x.p; // ok
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}
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},
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function() {
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var x : {p:{q:?string}} = {p:{q:"xxx"}};
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if (x.p.q != null) {
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var y : string = x.p.q; // ok
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}
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},
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// expr == null
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function() {
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var x : ?string = "xxx";
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if (x == null) {} else {
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var y : string = x; // ok
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}
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},
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function() {
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var x : {p:?string} = {p:"xxx"};
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if (x.p == null) {} else {
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var y : string = x.p; // ok
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}
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},
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function() {
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var x : {p:{q:?string}} = {p:{q:"xxx"}};
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if (x.p.q == null) {} else {
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var y : string = x.p.q; // ok
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}
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},
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// expr !== null
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function() {
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var x : ?string = "xxx";
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if (x !== null) {
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var y : string | void = x; // ok
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}
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},
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function() {
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var x : {p:?string} = {p:"xxx"};
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if (x.p !== null) {
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var y : string | void = x.p; // ok
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}
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},
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function() {
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var x : {p:{q:?string}} = {p:{q:"xxx"}};
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if (x.p.q !== null) {
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var y : string | void = x.p.q; // ok
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}
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},
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// expr === null
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function() {
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var x : ?string = "xxx";
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if (x === null) {} else {
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var y : string | void = x; // ok
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}
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},
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function() {
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var x : {p:?string} = {p:"xxx"};
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if (x.p === null) {} else {
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var y : string | void = x.p; // ok
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}
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},
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function() {
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var x : {p:{q:?string}} = {p:{q:"xxx"}};
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if (x.p.q === null) {} else {
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var y : string | void = x.p.q; // ok
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}
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},
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];
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// this.p op null
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class C {
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p: ?string;
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ensure0(): string {
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if (this.p != null)
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return this.p;
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else
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return "";
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}
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ensure1(): string {
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if (this.p == null)
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return "";
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return this.p;
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}
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ensure2(): string | void {
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if (this.p !== null)
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return this.p;
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else
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return "";
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}
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ensure3(): string | void {
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if (this.p === null)
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return "";
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return this.p;
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}
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}
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// super.p op null
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class D extends C {
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ensure100(): string {
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if (super.p != null)
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return super.p;
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else
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return "";
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}
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ensure101(): string {
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if (super.p == null)
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return "";
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else
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return super.p;
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}
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ensure103(): string {
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if (super.p != null) {
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alert("");
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return super.p; // not ok
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}
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return "";
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}
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}
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