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minor tweak to null handling in stringify

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This commit is contained in:
Ron Buckton 2015-11-24 16:26:57 -08:00
parent 5c23a5f11e
commit aa5e57668f
1 changed files with 10 additions and 6 deletions
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16
src/compiler/utilities.ts
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@ -2415,24 +2415,28 @@ namespace ts {
}
export const stringify: (value: any) => string = JSON && JSON.stringify ? JSON.stringify : function stringify(value: any): string {
return value === undefined ? undefined : stringifyValue(value);
};
function stringifyValue(value: any): string {
/* tslint:disable:no-null */
return value == null ? "null"
return value === null ? "null" // explicit test for `null` as `typeof null` is "object"
: typeof value === "string" ? `"${escapeString(value)}"`
: typeof value === "number" ? String(value)
: typeof value === "boolean" ? value ? "true" : "false"
: isArray(value) ? `[${reduceLeft(value, stringifyElement, "")}]`
: typeof value === "object" ? `{${reduceProperties(value, stringifyProperty, "")}}`
: "null";
: /*fallback*/ "null";
/* tslint:enable:no-null */
};
}
function stringifyElement(memo: string, value: any) {
return (memo ? memo + "," : memo) + stringify(value);
return (memo ? memo + "," : memo) + stringifyValue(value);
}
function stringifyProperty(memo: string, value: any, key: string) {
return value === undefined ? memo
: (memo ? memo + "," : memo) + `"${escapeString(key)}":${stringify(value)}`;
return value === undefined || typeof value === "function" ? memo
: (memo ? memo + "," : memo) + `"${escapeString(key)}":${stringifyValue(value)}`;
}
const base64Digits = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";