blob: 1c9ee5b98e11619bf979780b3627fe2e7bb18728 [file] [log] [blame]
"use strict";
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
Object.defineProperty(o, k2, { enumerable: true, get: function() { return m[k]; } });
}) : (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
__setModuleDefault(result, mod);
return result;
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.getTypeName = void 0;
const ts = __importStar(require("typescript"));
/**
* Get the type name of a given type.
* @param typeChecker The context sensitive TypeScript TypeChecker.
* @param type The type to get the name of.
*/
function getTypeName(typeChecker, type) {
// It handles `string` and string literal types as string.
if ((type.flags & ts.TypeFlags.StringLike) !== 0) {
return 'string';
}
// If the type is a type parameter which extends primitive string types,
// but it was not recognized as a string like. So check the constraint
// type of the type parameter.
if ((type.flags & ts.TypeFlags.TypeParameter) !== 0) {
// `type.getConstraint()` method doesn't return the constraint type of
// the type parameter for some reason. So this gets the constraint type
// via AST.
const symbol = type.getSymbol();
const decls = symbol === null || symbol === void 0 ? void 0 : symbol.getDeclarations();
const typeParamDecl = decls === null || decls === void 0 ? void 0 : decls[0];
if (ts.isTypeParameterDeclaration(typeParamDecl) &&
typeParamDecl.constraint != null) {
return getTypeName(typeChecker, typeChecker.getTypeFromTypeNode(typeParamDecl.constraint));
}
}
// If the type is a union and all types in the union are string like,
// return `string`. For example:
// - `"a" | "b"` is string.
// - `string | string[]` is not string.
if (type.isUnion() &&
type.types
.map(value => getTypeName(typeChecker, value))
.every(t => t === 'string')) {
return 'string';
}
// If the type is an intersection and a type in the intersection is string
// like, return `string`. For example: `string & {__htmlEscaped: void}`
if (type.isIntersection() &&
type.types
.map(value => getTypeName(typeChecker, value))
.some(t => t === 'string')) {
return 'string';
}
return typeChecker.typeToString(type);
}
exports.getTypeName = getTypeName;
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