typescript-estree
Version:
A parser that converts TypeScript source code into an ESTree compatible form
82 lines (81 loc) • 4.97 kB
JavaScript
;
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
const typescript_1 = __importDefault(require("typescript"));
/**
* By default, diagnostics from the TypeScript compiler contain all errors - regardless of whether
* they are related to generic ECMAScript standards, or TypeScript-specific constructs.
*
* Therefore, we filter out all diagnostics, except for the ones we explicitly want to consider when
* the user opts in to throwing errors on semantic issues.
*/
function getFirstSemanticOrSyntacticError(program, ast) {
try {
const supportedSyntacticDiagnostics = whitelistSupportedDiagnostics(program.getSyntacticDiagnostics(ast));
if (supportedSyntacticDiagnostics.length) {
return convertDiagnosticToSemanticOrSyntacticError(supportedSyntacticDiagnostics[0]);
}
const supportedSemanticDiagnostics = whitelistSupportedDiagnostics(program.getSemanticDiagnostics(ast));
if (supportedSemanticDiagnostics.length) {
return convertDiagnosticToSemanticOrSyntacticError(supportedSemanticDiagnostics[0]);
}
return undefined;
}
catch (e) {
/**
* TypeScript compiler has certain Debug.fail() statements in, which will cause the diagnostics
* retrieval above to throw.
*
* E.g. from ast-alignment-tests
* "Debug Failure. Shouldn't ever directly check a JsxOpeningElement"
*
* For our current use-cases this is undesired behavior, so we just suppress it
* and log a a warning.
*/
console.warn(`Warning From TSC: "${e.message}`);
return undefined;
}
}
exports.getFirstSemanticOrSyntacticError = getFirstSemanticOrSyntacticError;
function whitelistSupportedDiagnostics(diagnostics) {
return diagnostics.filter(diagnostic => {
switch (diagnostic.code) {
case 1014: // ts 3.2 "A rest parameter must be last in a parameter list."
case 1044: // ts 3.2 "'{0}' modifier cannot appear on a module or namespace element."
case 1045: // ts 3.2 "A '{0}' modifier cannot be used with an interface declaration."
case 1048: // ts 3.2 "A rest parameter cannot have an initializer."
case 1049: // ts 3.2 "A 'set' accessor must have exactly one parameter."
case 1070: // ts 3.2 "'{0}' modifier cannot appear on a type member."
case 1071: // ts 3.2 "'{0}' modifier cannot appear on an index signature."
case 1090: // ts 3.2 "'{0}' modifier cannot appear on a parameter."
case 1096: // ts 3.2 "An index signature must have exactly one parameter."
case 1097: // ts 3.2 "'{0}' list cannot be empty."
case 1117: // ts 3.2 "An object literal cannot have multiple properties with the same name in strict mode."
case 1121: // ts 3.2 "Octal literals are not allowed in strict mode."
case 1123: // ts 3.2: "Variable declaration list cannot be empty."
case 1141: // ts 3.2 "String literal expected."
case 1172: // ts 3.2 "'extends' clause already seen."
case 1173: // ts 3.2 "'extends' clause must precede 'implements' clause."
case 1175: // ts 3.2 "'implements' clause already seen."
case 1176: // ts 3.2 "Interface declaration cannot have 'implements' clause."
case 1190: // ts 3.2 "The variable declaration of a 'for...of' statement cannot have an initializer."
case 1200: // ts 3.2 "Line terminator not permitted before arrow."
case 1206: // ts 3.2 "Decorators are not valid here."
case 1211: // ts 3.2 "A class declaration without the 'default' modifier must have a name."
case 1242: // ts 3.2 "'abstract' modifier can only appear on a class, method, or property declaration."
case 1246: // ts 3.2 "An interface property cannot have an initializer."
case 2364: // ts 3.2 "The left-hand side of an assignment expression must be a variable or a property access."
case 2369: // ts 3.2 "A parameter property is only allowed in a constructor implementation."
case 2462: // ts 3.2 "A rest element must be last in a destructuring pattern."
case 17012: // ts 3.2 "'{0}' is not a valid meta-property for keyword '{1}'. Did you mean '{2}'?"
case 17013: // ts 3.2 "Meta-property '{0}' is only allowed in the body of a function declaration, function expression, or constructor."
return true;
}
return false;
});
}
function convertDiagnosticToSemanticOrSyntacticError(diagnostic) {
return Object.assign({}, diagnostic, { message: typescript_1.default.flattenDiagnosticMessageText(diagnostic.messageText, typescript_1.default.sys.newLine) });
}