declarationEmitBindingPatternsFunctionExpr.symbols

//// [tests/cases/compiler/declarationEmitBindingPatternsFunctionExpr.ts] ////

=== declarationEmitBindingPatternsFunctionExpr.ts ===
type Named = { name: string }
>Named : Symbol(Named, Decl(declarationEmitBindingPatternsFunctionExpr.ts, 0, 0))
>name : Symbol(name, Decl(declarationEmitBindingPatternsFunctionExpr.ts, 0, 14))

// Tempting to remove alias if unused 
let notReferenced = ({ name: alias }: Named) => { }
>notReferenced : Symbol(notReferenced, Decl(declarationEmitBindingPatternsFunctionExpr.ts, 2, 3))
>name : Symbol(name, Decl(declarationEmitBindingPatternsFunctionExpr.ts, 0, 14))
>alias : Symbol(alias, Decl(declarationEmitBindingPatternsFunctionExpr.ts, 2, 22))
>Named : Symbol(Named, Decl(declarationEmitBindingPatternsFunctionExpr.ts, 0, 0))

// Resons we can't remove aliases that are not used in the function signature: 

// 1.Causes duplicate identifier if we remove alias
const duplicateIndetifiers = ({ name: alias, name: alias2 }: Named) => { }
>duplicateIndetifiers : Symbol(duplicateIndetifiers, Decl(declarationEmitBindingPatternsFunctionExpr.ts, 7, 5))
>name : Symbol(name, Decl(declarationEmitBindingPatternsFunctionExpr.ts, 0, 14))
>alias : Symbol(alias, Decl(declarationEmitBindingPatternsFunctionExpr.ts, 7, 31))
>name : Symbol(name, Decl(declarationEmitBindingPatternsFunctionExpr.ts, 0, 14))
>alias2 : Symbol(alias2, Decl(declarationEmitBindingPatternsFunctionExpr.ts, 7, 44))
>Named : Symbol(Named, Decl(declarationEmitBindingPatternsFunctionExpr.ts, 0, 0))

const duplicateIndetifiers2 = (name: string, { name: alias }: Named) => { }
>duplicateIndetifiers2 : Symbol(duplicateIndetifiers2, Decl(declarationEmitBindingPatternsFunctionExpr.ts, 8, 5))
>name : Symbol(name, Decl(declarationEmitBindingPatternsFunctionExpr.ts, 8, 31))
>name : Symbol(name, Decl(declarationEmitBindingPatternsFunctionExpr.ts, 0, 14))
>alias : Symbol(alias, Decl(declarationEmitBindingPatternsFunctionExpr.ts, 8, 46))
>Named : Symbol(Named, Decl(declarationEmitBindingPatternsFunctionExpr.ts, 0, 0))

const duplicateIndetifiers3 = ({ name: alias }: Named, { name: alias2 }: Named) => { }
>duplicateIndetifiers3 : Symbol(duplicateIndetifiers3, Decl(declarationEmitBindingPatternsFunctionExpr.ts, 9, 5))
>name : Symbol(name, Decl(declarationEmitBindingPatternsFunctionExpr.ts, 0, 14))
>alias : Symbol(alias, Decl(declarationEmitBindingPatternsFunctionExpr.ts, 9, 32))
>Named : Symbol(Named, Decl(declarationEmitBindingPatternsFunctionExpr.ts, 0, 0))
>name : Symbol(name, Decl(declarationEmitBindingPatternsFunctionExpr.ts, 0, 14))
>alias2 : Symbol(alias2, Decl(declarationEmitBindingPatternsFunctionExpr.ts, 9, 56))
>Named : Symbol(Named, Decl(declarationEmitBindingPatternsFunctionExpr.ts, 0, 0))

let value = "";
>value : Symbol(value, Decl(declarationEmitBindingPatternsFunctionExpr.ts, 11, 3))

// 2.Can change in meaning for typeof value if we remove alias
const shadowedVariable = ({ value: alias }: { value: string }): typeof value => value;
>shadowedVariable : Symbol(shadowedVariable, Decl(declarationEmitBindingPatternsFunctionExpr.ts, 13, 5))
>value : Symbol(value, Decl(declarationEmitBindingPatternsFunctionExpr.ts, 13, 45))
>alias : Symbol(alias, Decl(declarationEmitBindingPatternsFunctionExpr.ts, 13, 27))
>value : Symbol(value, Decl(declarationEmitBindingPatternsFunctionExpr.ts, 13, 45))
>value : Symbol(value, Decl(declarationEmitBindingPatternsFunctionExpr.ts, 11, 3))
>value : Symbol(value, Decl(declarationEmitBindingPatternsFunctionExpr.ts, 11, 3))