7c50bccec2
* migrate nullish coalescing commit * add more test case * add branch type check test * add more tests * fix nullish precedence * update public api * add rescan question question token to fix regression * update public api baseline * Added tests that emit for nullish coalescing operator conforming with grammar restrictions when assertions are used. * Fixed emit to hoist temporary variables (they previously went undeclared). Added tests to ensure calls and property accesses are only called once. * use not equal to null * rename factory * add grammar check * fix more cases * Fix handling of nullish coalescing oprator in expando objects. * Fixed classifier to support ?? operator. * update baseline * accept baseline * fix review * update emitter and more testcase * update control flow * make linter happy * update libs * avoid unnecessary assert * fix typooo * Fixes for control-flow analysis
41 lines
638 B
TypeScript
41 lines
638 B
TypeScript
// @strict: true
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declare const a: string | undefined
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declare const b: string | undefined
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declare const c: string | undefined
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// should be a syntax error
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a ?? b || c;
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// should be a syntax error
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a || b ?? c;
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// should be a syntax error
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a ?? b && c;
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// should be a syntax error
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a && b ?? c;
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// Valid according to spec
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a ?? (b || c);
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// Valid according to spec
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(a ?? b) || c;
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// Valid according to spec
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(a || b) ?? c;
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// Valid according to spec
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a || (b ?? c);
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// Valid according to spec
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a ?? (b && c);
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// Valid according to spec
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(a ?? b) && c;
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// Valid according to spec
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(a && b) ?? c;
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// Valid according to spec
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a && (b ?? c);
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