2fecc132ab
From spec: Note that type guards affect types of variables and parameters only and have no effect on members of objects such as properties
48 lines
1.2 KiB
TypeScript
48 lines
1.2 KiB
TypeScript
//// [typeGuardsInExternalModule.ts]
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// Note that type guards affect types of variables and parameters only and
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// have no effect on members of objects such as properties.
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// local variable in external module
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var num: number;
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var var1: string | number;
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if (typeof var1 === "string") {
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num = var1.length; // string
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}
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else {
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num = var1; // number
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}
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// exported variable in external module
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var strOrNum: string | number;
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export var var2: string | number;
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if (typeof var2 === "string") {
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// export makes the var property and not variable
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strOrNum = var2; // string | number
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}
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else {
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strOrNum = var2; // number | string
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}
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//// [typeGuardsInExternalModule.js]
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// Note that type guards affect types of variables and parameters only and
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// have no effect on members of objects such as properties.
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// local variable in external module
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var num;
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var var1;
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if (typeof var1 === "string") {
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num = var1.length; // string
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}
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else {
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num = var1; // number
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}
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// exported variable in external module
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var strOrNum;
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exports.var2;
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if (typeof exports.var2 === "string") {
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// export makes the var property and not variable
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strOrNum = exports.var2; // string | number
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}
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else {
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strOrNum = exports.var2; // number | string
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}
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