Method parseNumberNode

packages/core/src/constraints/parser.ts:310–340

()

  }

  private parseNumberNode(): Readonly<{ kind: "number"; value: number }> {
    const start = this.pos;
    const first = this.peek();
    if (first === null || !isDigit(first)) {
      this.fail("Expected number");
    }

    while (true) {
      const ch = this.peek();
      if (ch === null || !isDigit(ch)) break;
      this.pos++;
    }

    if (this.peek() === ".") {
      this.pos++;
      const fractional = this.peek();
      if (fractional === null || !isDigit(fractional)) {
        this.fail("Expected digits after decimal point");
      }
      while (true) {
        const ch = this.peek();
        if (ch === null || !isDigit(ch)) break;
        this.pos++;
      }
    }

    const raw = this.source.slice(start, this.pos);
    const value = Number.parseFloat(raw);
    if (!Number.isFinite(value)) this.fail(`Invalid number "${raw}"`, start);
    return { kind: "number", value };
  }

  private readIdentifier(): string {
    const start = this.pos;