修改后台权限

node_modules/graphql/language/schemaCoordinateLexer.mjs

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+import { syntaxError } from '../error/syntaxError.mjs';
+import { Token } from './ast.mjs';
+import { isNameStart } from './characterClasses.mjs';
+import { createToken, printCodePointAt, readName } from './lexer.mjs';
+import { TokenKind } from './tokenKind.mjs';
+/**
+ * Given a Source schema coordinate, creates a Lexer for that source.
+ * A SchemaCoordinateLexer is a stateful stream generator in that every time
+ * it is advanced, it returns the next token in the Source. Assuming the
+ * source lexes, the final Token emitted by the lexer will be of kind
+ * EOF, after which the lexer will repeatedly return the same EOF token
+ * whenever called.
+ */
+
+export class SchemaCoordinateLexer {
+  /**
+   * The previously focused non-ignored token.
+   */
+
+  /**
+   * The currently focused non-ignored token.
+   */
+
+  /**
+   * The (1-indexed) line containing the current token.
+   * Since a schema coordinate may not contain newline, this value is always 1.
+   */
+  line = 1;
+  /**
+   * The character offset at which the current line begins.
+   * Since a schema coordinate may not contain newline, this value is always 0.
+   */
+
+  lineStart = 0;
+
+  constructor(source) {
+    const startOfFileToken = new Token(TokenKind.SOF, 0, 0, 0, 0);
+    this.source = source;
+    this.lastToken = startOfFileToken;
+    this.token = startOfFileToken;
+  }
+
+  get [Symbol.toStringTag]() {
+    return 'SchemaCoordinateLexer';
+  }
+  /**
+   * Advances the token stream to the next non-ignored token.
+   */
+
+  advance() {
+    this.lastToken = this.token;
+    const token = (this.token = this.lookahead());
+    return token;
+  }
+  /**
+   * Looks ahead and returns the next non-ignored token, but does not change
+   * the current Lexer token.
+   */
+
+  lookahead() {
+    let token = this.token;
+
+    if (token.kind !== TokenKind.EOF) {
+      // Read the next token and form a link in the token linked-list.
+      const nextToken = readNextToken(this, token.end); // @ts-expect-error next is only mutable during parsing.
+
+      token.next = nextToken; // @ts-expect-error prev is only mutable during parsing.
+
+      nextToken.prev = token;
+      token = nextToken;
+    }
+
+    return token;
+  }
+}
+/**
+ * Gets the next token from the source starting at the given position.
+ */
+
+function readNextToken(lexer, start) {
+  const body = lexer.source.body;
+  const bodyLength = body.length;
+  const position = start;
+
+  if (position < bodyLength) {
+    const code = body.charCodeAt(position);
+
+    switch (code) {
+      case 0x002e:
+        // .
+        return createToken(lexer, TokenKind.DOT, position, position + 1);
+
+      case 0x0028:
+        // (
+        return createToken(lexer, TokenKind.PAREN_L, position, position + 1);
+
+      case 0x0029:
+        // )
+        return createToken(lexer, TokenKind.PAREN_R, position, position + 1);
+
+      case 0x003a:
+        // :
+        return createToken(lexer, TokenKind.COLON, position, position + 1);
+
+      case 0x0040:
+        // @
+        return createToken(lexer, TokenKind.AT, position, position + 1);
+    } // Name
+
+    if (isNameStart(code)) {
+      return readName(lexer, position);
+    }
+
+    throw syntaxError(
+      lexer.source,
+      position,
+      `Invalid character: ${printCodePointAt(lexer, position)}.`,
+    );
+  }
+
+  return createToken(lexer, TokenKind.EOF, bodyLength, bodyLength);
+}