f619282af1
* Remove check narrowing only certain types, add test showing issues with this * string literal case test * Reconcile fix with CFA work * Defaultable -> NotNarrowable to align with use * Missed a defaultable in comments * Add test for narrowing to unions of string literals * Actually merge from master * Run fixupParentReferences when parsing isolated jsDocComment * initial revision of unit test support for project system in tsserver * Add non-widening forms of null and undefined * Create separate control flows for property declarations with initializers * Add regression test * Add tests * Remove unused variable * Add null check and CR feedback * Revert "Merge pull request #7235 from weswigham/narrow-all-types" This reverts commitef0f6c8fe4, reversing changes made to9f087cb62a. * reuse the fixupParentReferences function * Fix up error from merging with master
81 lines
1.4 KiB
Plaintext
81 lines
1.4 KiB
Plaintext
=== tests/cases/conformance/types/typeRelationships/widenedTypes/initializersWidened.ts ===
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// these are widened to any at the point of assignment
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var x1 = null;
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>x1 : any
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>null : null
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var y1 = undefined;
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>y1 : any
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>undefined : undefined
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var z1 = void 0;
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>z1 : any
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>void 0 : undefined
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>0 : number
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// these are not widened
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var x2: null;
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>x2 : null
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>null : null
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var y2: undefined;
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>y2 : undefined
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var x3: null = null;
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>x3 : null
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>null : null
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>null : null
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var y3: undefined = undefined;
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>y3 : undefined
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>undefined : undefined
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var z3: undefined = void 0;
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>z3 : undefined
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>void 0 : undefined
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>0 : number
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// widen only when all constituents of union are widening
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var x4 = null || null;
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>x4 : any
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>null || null : null
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>null : null
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>null : null
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var y4 = undefined || undefined;
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>y4 : any
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>undefined || undefined : undefined
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>undefined : undefined
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>undefined : undefined
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var z4 = void 0 || void 0;
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>z4 : any
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>void 0 || void 0 : undefined
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>void 0 : undefined
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>0 : number
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>void 0 : undefined
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>0 : number
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var x5 = null || x2;
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>x5 : null
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>null || x2 : null
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>null : null
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>x2 : null
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var y5 = undefined || y2;
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>y5 : undefined
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>undefined || y2 : undefined
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>undefined : undefined
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>y2 : undefined
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var z5 = void 0 || y2;
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>z5 : undefined
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>void 0 || y2 : undefined
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>void 0 : undefined
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>0 : number
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>y2 : undefined
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