232 lines
3.8 KiB
Plaintext
232 lines
3.8 KiB
Plaintext
=== tests/cases/conformance/expressions/typeGuards/typeGuardFunction.ts ===
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class A {
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>A : A
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propA: number;
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>propA : number
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}
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class B {
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>B : B
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propB: number;
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>propB : number
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}
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class C extends A {
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>C : C
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>A : A
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propC: number;
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>propC : number
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}
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declare function isA(p1: any): p1 is A;
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>isA : (p1: any) => boolean
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>p1 : any
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>p1 : any
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>A : A
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declare function isB(p1: any): p1 is B;
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>isB : (p1: any) => boolean
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>p1 : any
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>p1 : any
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>B : B
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declare function isC(p1: any): p1 is C;
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>isC : (p1: any) => boolean
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>p1 : any
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>p1 : any
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>C : C
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declare function retC(): C;
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>retC : () => C
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>C : C
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var a: A;
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>a : A
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>A : A
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var b: B;
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>b : B
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>B : B
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// Basic
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if (isC(a)) {
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>isC(a) : boolean
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>isC : (p1: any) => boolean
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>a : A
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a.propC;
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>a.propC : number
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>a : C
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>propC : number
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}
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// Sub type
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var subType: C;
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>subType : C
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>C : C
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if(isA(subType)) {
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>isA(subType) : boolean
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>isA : (p1: any) => boolean
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>subType : C
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subType.propC;
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>subType.propC : number
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>subType : C
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>propC : number
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}
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// Union type
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var union: A | B;
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>union : A | B
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>A : A
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>B : B
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if(isA(union)) {
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>isA(union) : boolean
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>isA : (p1: any) => boolean
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>union : A | B
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union.propA;
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>union.propA : number
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>union : A
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>propA : number
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}
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// Call signature
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interface I1 {
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>I1 : I1
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(p1: A): p1 is C;
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>p1 : A
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>A : A
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>p1 : any
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>C : C
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}
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// The parameter index and argument index for the type guard target is matching.
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// The type predicate type is assignable to the parameter type.
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declare function isC_multipleParams(p1, p2): p1 is C;
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>isC_multipleParams : (p1: any, p2: any) => boolean
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>p1 : any
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>p2 : any
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>p1 : any
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>C : C
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if (isC_multipleParams(a, 0)) {
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>isC_multipleParams(a, 0) : boolean
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>isC_multipleParams : (p1: any, p2: any) => boolean
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>a : A
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>0 : number
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a.propC;
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>a.propC : number
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>a : C
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>propC : number
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}
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// Methods
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var obj: {
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>obj : { func1(p1: A): boolean; }
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func1(p1: A): p1 is C;
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>func1 : (p1: A) => boolean
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>p1 : A
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>A : A
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>p1 : any
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>C : C
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}
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class D {
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>D : D
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method1(p1: A): p1 is C {
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>method1 : (p1: A) => boolean
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>p1 : A
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>A : A
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>p1 : any
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>C : C
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return true;
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>true : boolean
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}
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}
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// Arrow function
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let f1 = (p1: A): p1 is C => false;
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>f1 : (p1: A) => boolean
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>(p1: A): p1 is C => false : (p1: A) => boolean
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>p1 : A
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>A : A
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>p1 : any
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>C : C
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>false : boolean
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// Function type
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declare function f2(p1: (p1: A) => p1 is C);
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>f2 : (p1: (p1: A) => boolean) => any
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>p1 : (p1: A) => boolean
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>p1 : A
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>A : A
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>p1 : any
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>C : C
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// Function expressions
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f2(function(p1: A): p1 is C {
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>f2(function(p1: A): p1 is C { return true;}) : any
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>f2 : (p1: (p1: A) => boolean) => any
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>function(p1: A): p1 is C { return true;} : (p1: A) => boolean
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>p1 : A
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>A : A
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>p1 : any
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>C : C
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return true;
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>true : boolean
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});
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// Evaluations are asssignable to boolean.
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declare function acceptingBoolean(a: boolean);
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>acceptingBoolean : (a: boolean) => any
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>a : boolean
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acceptingBoolean(isA(a));
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>acceptingBoolean(isA(a)) : any
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>acceptingBoolean : (a: boolean) => any
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>isA(a) : boolean
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>isA : (p1: any) => boolean
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>a : A
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// Type predicates with different parameter name.
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declare function acceptingTypeGuardFunction(p1: (item) => item is A);
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>acceptingTypeGuardFunction : (p1: (item: any) => boolean) => any
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>p1 : (item: any) => boolean
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>item : any
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>item : any
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>A : A
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acceptingTypeGuardFunction(isA);
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>acceptingTypeGuardFunction(isA) : any
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>acceptingTypeGuardFunction : (p1: (item: any) => boolean) => any
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>isA : (p1: any) => boolean
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// Binary expressions
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let union2: C | B;
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>union2 : B | C
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>C : C
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>B : B
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let union3: boolean | B = isA(union2) || union2;
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>union3 : boolean | B
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>B : B
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>isA(union2) || union2 : boolean | B
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>isA(union2) : boolean
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>isA : (p1: any) => boolean
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>union2 : B | C
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>union2 : B
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