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Prevent usage of reserved words in grammars #749

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merged 3 commits into from
Nov 7, 2022
Merged

Prevent usage of reserved words in grammars #749

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b5c4dda
Prevent usage of reserved JS words in grammars
msujew Nov 1, 2022
48b6787
Add type attribute validation
msujew Nov 1, 2022
17699dc
Remove keywords from reserved names
msujew Nov 2, 2022
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122 changes: 117 additions & 5 deletions packages/langium/src/grammar/langium-grammar-validator.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -9,7 +9,7 @@ import { Utils } from 'vscode-uri';
import { NamedAstNode } from '../references/name-provider';
import { References } from '../references/references';
import { LangiumServices } from '../services';
import { AstNode, Reference } from '../syntax-tree';
import { AstNode, Properties, Reference } from '../syntax-tree';
import { getContainerOfType, getDocument, streamAllContents } from '../utils/ast-util';
import { MultiMap } from '../utils/collections';
import { toDocumentSegment } from '../utils/cst-util';
Expand All @@ -29,21 +29,27 @@ export class LangiumGrammarValidationRegistry extends ValidationRegistry {
super(services);
const validator = services.validation.LangiumGrammarValidator;
const checks: ValidationChecks<ast.LangiumGrammarAstType> = {
Action: validator.checkActionTypeUnions,
Action: [
validator.checkActionTypeUnions,
validator.checkAssignmentReservedName
],
AbstractRule: validator.checkRuleName,
Assignment: [
validator.checkAssignmentWithFeatureName,
validator.checkAssignmentToFragmentRule
validator.checkAssignmentToFragmentRule,
validator.checkAssignmentReservedName
],
ParserRule: [
validator.checkParserRuleDataType,
validator.checkRuleParametersUsed
validator.checkRuleParametersUsed,
validator.checkParserRuleReservedName,
],
TerminalRule: [
validator.checkTerminalRuleReturnType,
validator.checkHiddenTerminalRule,
validator.checkEmptyTerminalRule
],
InferredType: validator.checkTypeReservedName,
Keyword: validator.checkKeyword,
UnorderedGroup: validator.checkUnorderedGroup,
Grammar: [
Expand All @@ -63,6 +69,9 @@ export class LangiumGrammarValidationRegistry extends ValidationRegistry {
],
GrammarImport: validator.checkPackageImport,
CharacterRange: validator.checkInvalidCharacterRange,
Interface: validator.checkTypeReservedName,
Type: validator.checkTypeReservedName,
TypeAttribute: validator.checkTypeReservedName,
RuleCall: [
validator.checkUsedHiddenTerminalRule,
validator.checkUsedFragmentTerminalRule,
Expand Down Expand Up @@ -548,11 +557,39 @@ export class LangiumGrammarValidator {
if (rule.name && !isEmptyRule(rule)) {
const firstChar = rule.name.substring(0, 1);
if (firstChar.toUpperCase() !== firstChar) {
accept('warning', 'Rule name should start with an upper case letter.', { node: rule, property: 'name', code: IssueCodes.RuleNameUppercase });
accept('warning', 'Rule name should start with an upper case letter.', {
node: rule,
property: 'name',
code: IssueCodes.RuleNameUppercase
});
}
}
}

checkTypeReservedName(type: ast.Interface | ast.TypeAttribute | ast.Type | ast.InferredType, accept: ValidationAcceptor): void {
this.checkReservedName(type, 'name', accept);
}

checkAssignmentReservedName(assignment: ast.Assignment | ast.Action, accept: ValidationAcceptor): void {
this.checkReservedName(assignment, 'feature', accept);
}

checkParserRuleReservedName(rule: ast.ParserRule, accept: ValidationAcceptor): void {
if (!rule.inferredType) {
this.checkReservedName(rule, 'name', accept);
}
}

private checkReservedName<N extends AstNode>(node: N, property: Properties<N>, accept: ValidationAcceptor): void {
const name = node[property as keyof N];
if (typeof name === 'string' && reservedNames.has(name)) {
accept('error', `'${name}' is a reserved name of the JavaScript runtime.`, {
node,
property
});
}
}

checkKeyword(keyword: ast.Keyword, accept: ValidationAcceptor): void {
if (keyword.value.length === 0) {
accept('error', 'Keywords cannot be empty.', { node: keyword });
Expand Down Expand Up @@ -684,3 +721,78 @@ function isPrimitiveType(type: string): boolean {
function isEmptyRule(rule: ast.AbstractRule): boolean {
return !rule.definition || !rule.definition.$cstNode || rule.definition.$cstNode.length === 0;
}

const reservedNames = new Set([
// Built-in objects, properties and methods
// Collections
'Array',
'Int8Array',
'Uint8Array',
'Uint8ClampedArray',
'Int16Array',
'Uint16Array',
'Int32Array',
'Uint32Array',
'Float32Array',
'Float64Array',
'BigInt64Array',
'BigUint64Array',
// Keyed collections
'Map',
'Set',
'WeakMap',
'WeakSet',
// Errors
'Error',
'AggregateError',
'EvalError',
'InternalError',
'RangeError',
'ReferenceError',
'SyntaxError',
'TypeError',
'URIError',
// Primitives
'BigInt',
'RegExp',
'Number',
'Object',
'Function',
'Symbol',
'String',
// Math
'Math',
'NaN',
'Infinity',
'isFinite',
'isNaN',
// Structured data
'Buffer',
'ArrayBuffer',
'SharedArrayBuffer',
'Atomics',
'DataView',
'JSON',
'globalThis',
'decodeURIComponent',
'decodeURI',
'encodeURIComponent',
'encodeURI',
'parseInt',
'parseFloat',
// Control abstraction
'Promise',
'Generator',
'GeneratorFunction',
'AsyncFunction',
'AsyncGenerator',
'AsyncGeneratorFunction',
// Reflection
'Reflect',
'Proxy',
// Others
'Date',
'Intl',
'eval',
'undefined'
]);
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