130 lines
2.2 KiB
Plaintext
130 lines
2.2 KiB
Plaintext
=== tests/cases/conformance/expressions/binaryOperators/additionOperator/additionOperatorWithUndefinedValueAndValidOperator.ts ===
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// If one operand is the null or undefined value, it is treated as having the type of the other operand.
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enum E { a, b, c }
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>E : E
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>a : E
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>b : E
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>c : E
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var a: any;
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>a : any
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var b: number;
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>b : number
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var c: E;
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>c : E
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>E : E
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var d: string;
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>d : string
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// undefined + any
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var r1: any = undefined + a;
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>r1 : any
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>undefined + a : any
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>undefined : undefined
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>a : any
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var r2: any = a + undefined;
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>r2 : any
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>a + undefined : any
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>a : any
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>undefined : undefined
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// undefined + number/enum
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var r3 = undefined + b;
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>r3 : number
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>undefined + b : number
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>undefined : undefined
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>b : number
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var r4 = undefined + 1;
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>r4 : number
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>undefined + 1 : number
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>undefined : undefined
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>1 : number
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var r5 = undefined + c;
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>r5 : number
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>undefined + c : number
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>undefined : undefined
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>c : E
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var r6 = undefined + E.a;
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>r6 : number
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>undefined + E.a : number
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>undefined : undefined
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>E.a : E
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>E : typeof E
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>a : E
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var r7 = undefined + E['a'];
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>r7 : number
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>undefined + E['a'] : number
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>undefined : undefined
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>E['a'] : E
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>E : typeof E
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>'a' : string
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var r8 = b + undefined;
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>r8 : number
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>b + undefined : number
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>b : number
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>undefined : undefined
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var r9 = 1 + undefined;
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>r9 : number
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>1 + undefined : number
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>1 : number
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>undefined : undefined
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var r10 = c + undefined
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>r10 : number
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>c + undefined : number
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>c : E
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>undefined : undefined
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var r11 = E.a + undefined;
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>r11 : number
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>E.a + undefined : number
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>E.a : E
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>E : typeof E
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>a : E
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>undefined : undefined
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var r12 = E['a'] + undefined;
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>r12 : number
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>E['a'] + undefined : number
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>E['a'] : E
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>E : typeof E
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>'a' : string
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>undefined : undefined
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// undefined + string
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var r13 = undefined + d;
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>r13 : string
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>undefined + d : string
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>undefined : undefined
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>d : string
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var r14 = undefined + '';
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>r14 : string
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>undefined + '' : string
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>undefined : undefined
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>'' : string
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var r15 = d + undefined;
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>r15 : string
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>d + undefined : string
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>d : string
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>undefined : undefined
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var r16 = '' + undefined;
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>r16 : string
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>'' + undefined : string
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>'' : string
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>undefined : undefined
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