=== tests/cases/conformance/expressions/binaryOperators/additionOperator/additionOperatorWithNullValueAndValidOperator.ts ===
// If one operand is the null or undefined value, it is treated as having the type of the other operand.

enum E { a, b, c }
>E : E, Symbol(E, Decl(additionOperatorWithNullValueAndValidOperator.ts, 0, 0))
>a : E, Symbol(E.a, Decl(additionOperatorWithNullValueAndValidOperator.ts, 2, 8))
>b : E, Symbol(E.b, Decl(additionOperatorWithNullValueAndValidOperator.ts, 2, 11))
>c : E, Symbol(E.c, Decl(additionOperatorWithNullValueAndValidOperator.ts, 2, 14))

var a: any;
>a : any, Symbol(a, Decl(additionOperatorWithNullValueAndValidOperator.ts, 4, 3))

var b: number;
>b : number, Symbol(b, Decl(additionOperatorWithNullValueAndValidOperator.ts, 5, 3))

var c: E;
>c : E, Symbol(c, Decl(additionOperatorWithNullValueAndValidOperator.ts, 6, 3))
>E : E, Symbol(E, Decl(additionOperatorWithNullValueAndValidOperator.ts, 0, 0))

var d: string;
>d : string, Symbol(d, Decl(additionOperatorWithNullValueAndValidOperator.ts, 7, 3))

// null + any
var r1: any = null + a;
>r1 : any, Symbol(r1, Decl(additionOperatorWithNullValueAndValidOperator.ts, 10, 3))
>null + a : any
>null : null
>a : any, Symbol(a, Decl(additionOperatorWithNullValueAndValidOperator.ts, 4, 3))

var r2: any = a + null;
>r2 : any, Symbol(r2, Decl(additionOperatorWithNullValueAndValidOperator.ts, 11, 3))
>a + null : any
>a : any, Symbol(a, Decl(additionOperatorWithNullValueAndValidOperator.ts, 4, 3))
>null : null

// null + number/enum
var r3 = null + b;
>r3 : number, Symbol(r3, Decl(additionOperatorWithNullValueAndValidOperator.ts, 14, 3))
>null + b : number
>null : null
>b : number, Symbol(b, Decl(additionOperatorWithNullValueAndValidOperator.ts, 5, 3))

var r4 = null + 1;
>r4 : number, Symbol(r4, Decl(additionOperatorWithNullValueAndValidOperator.ts, 15, 3))
>null + 1 : number
>null : null
>1 : number

var r5 = null + c;
>r5 : number, Symbol(r5, Decl(additionOperatorWithNullValueAndValidOperator.ts, 16, 3))
>null + c : number
>null : null
>c : E, Symbol(c, Decl(additionOperatorWithNullValueAndValidOperator.ts, 6, 3))

var r6 = null + E.a;
>r6 : number, Symbol(r6, Decl(additionOperatorWithNullValueAndValidOperator.ts, 17, 3))
>null + E.a : number
>null : null
>E.a : E, Symbol(E.a, Decl(additionOperatorWithNullValueAndValidOperator.ts, 2, 8))
>E : typeof E, Symbol(E, Decl(additionOperatorWithNullValueAndValidOperator.ts, 0, 0))
>a : E, Symbol(E.a, Decl(additionOperatorWithNullValueAndValidOperator.ts, 2, 8))

var r7 = null + E['a'];
>r7 : number, Symbol(r7, Decl(additionOperatorWithNullValueAndValidOperator.ts, 18, 3))
>null + E['a'] : number
>null : null
>E['a'] : E
>E : typeof E, Symbol(E, Decl(additionOperatorWithNullValueAndValidOperator.ts, 0, 0))
>'a' : string, Symbol(E.a, Decl(additionOperatorWithNullValueAndValidOperator.ts, 2, 8))

var r8 = b + null;
>r8 : number, Symbol(r8, Decl(additionOperatorWithNullValueAndValidOperator.ts, 19, 3))
>b + null : number
>b : number, Symbol(b, Decl(additionOperatorWithNullValueAndValidOperator.ts, 5, 3))
>null : null

var r9 = 1 + null;
>r9 : number, Symbol(r9, Decl(additionOperatorWithNullValueAndValidOperator.ts, 20, 3))
>1 + null : number
>1 : number
>null : null

var r10 = c + null
>r10 : number, Symbol(r10, Decl(additionOperatorWithNullValueAndValidOperator.ts, 21, 3))
>c + null : number
>c : E, Symbol(c, Decl(additionOperatorWithNullValueAndValidOperator.ts, 6, 3))
>null : null

var r11 = E.a + null;
>r11 : number, Symbol(r11, Decl(additionOperatorWithNullValueAndValidOperator.ts, 22, 3))
>E.a + null : number
>E.a : E, Symbol(E.a, Decl(additionOperatorWithNullValueAndValidOperator.ts, 2, 8))
>E : typeof E, Symbol(E, Decl(additionOperatorWithNullValueAndValidOperator.ts, 0, 0))
>a : E, Symbol(E.a, Decl(additionOperatorWithNullValueAndValidOperator.ts, 2, 8))
>null : null

var r12 = E['a'] + null;
>r12 : number, Symbol(r12, Decl(additionOperatorWithNullValueAndValidOperator.ts, 23, 3))
>E['a'] + null : number
>E['a'] : E
>E : typeof E, Symbol(E, Decl(additionOperatorWithNullValueAndValidOperator.ts, 0, 0))
>'a' : string, Symbol(E.a, Decl(additionOperatorWithNullValueAndValidOperator.ts, 2, 8))
>null : null

// null + string
var r13 = null + d;
>r13 : string, Symbol(r13, Decl(additionOperatorWithNullValueAndValidOperator.ts, 26, 3))
>null + d : string
>null : null
>d : string, Symbol(d, Decl(additionOperatorWithNullValueAndValidOperator.ts, 7, 3))

var r14 = null + '';
>r14 : string, Symbol(r14, Decl(additionOperatorWithNullValueAndValidOperator.ts, 27, 3))
>null + '' : string
>null : null
>'' : string

var r15 = d + null;
>r15 : string, Symbol(r15, Decl(additionOperatorWithNullValueAndValidOperator.ts, 28, 3))
>d + null : string
>d : string, Symbol(d, Decl(additionOperatorWithNullValueAndValidOperator.ts, 7, 3))
>null : null

var r16 = '' + null;
>r16 : string, Symbol(r16, Decl(additionOperatorWithNullValueAndValidOperator.ts, 29, 3))
>'' + null : string
>'' : string
>null : null