feat: support named members in tuples

- Add NamedSchema interface with optional name property
- Update TupleSchema.elements to use NamedSchema[]
- Add parseNamedSchema() to support [x: number; y: number] syntax
- Update validator to parse named members in tuple values
- Fix schemaToTypeString in csv-loader for NamedSchema
- Fix createValidator to handle NamedSchema.schema
- Ensure single named element stays as tuple (not array)

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

src/csv-loader/loader.ts

@@ -40,12 +40,12 @@ function schemaToTypeString(schema: Schema): string {
       return 'boolean';
     case 'array':
       if (schema.element.type === 'tuple') {
-        const tupleElements = schema.element.elements.map(schemaToTypeString);
+        const tupleElements = schema.element.elements.map((el) => schemaToTypeString(el.schema));
         return `[${tupleElements.join(', ')}]`;
       }
       return `${schemaToTypeString(schema.element)}[]`;
     case 'tuple':
-      const tupleElements = schema.elements.map(schemaToTypeString);
+      const tupleElements = schema.elements.map((el) => schemaToTypeString(el.schema));
       return `[${tupleElements.join(', ')}]`;
     default:
       return 'unknown';

src/parser.ts

@@ -1,4 +1,4 @@
-import type { Schema, PrimitiveSchema, TupleSchema, ArraySchema } from './types';
+import type { Schema, PrimitiveSchema, TupleSchema, ArraySchema, NamedSchema } from './types';
 
 export class ParseError extends Error {
   constructor(message: string, public position?: number) {
@@ -86,7 +86,7 @@ class Parser {
     }
     
     if (this.consumeStr('[')) {
-      const elements: Schema[] = [];
+      const elements: NamedSchema[] = [];
       this.skipWhitespace();
 
       if (this.peek() === ']') {
@@ -94,14 +94,14 @@ class Parser {
         throw new ParseError('Empty array/tuple not allowed', this.pos);
       }
 
-      elements.push(this.parseSchema());
+      elements.push(this.parseNamedSchema());
       this.skipWhitespace();
 
       if (this.consumeStr(';')) {
-        const remainingElements: Schema[] = [];
+        const remainingElements: NamedSchema[] = [];
         while (true) {
           this.skipWhitespace();
-          remainingElements.push(this.parseSchema());
+          remainingElements.push(this.parseNamedSchema());
           this.skipWhitespace();
 
           if (!this.consumeStr(';')) {
@@ -122,14 +122,14 @@ class Parser {
         if (!this.consumeStr(']')) {
           throw new ParseError('Expected ]', this.pos);
         }
-        if (elements.length === 1) {
-          return { type: 'array', element: elements[0] };
+        if (elements.length === 1 && !elements[0].name) {
+          return { type: 'array', element: elements[0].schema };
         }
         return { type: 'array', element: { type: 'tuple', elements } };
       }
 
-      if (elements.length === 1) {
-        return { type: 'array', element: elements[0] };
+      if (elements.length === 1 && !elements[0].name) {
+        return { type: 'array', element: elements[0].schema };
       }
       return { type: 'tuple', elements };
     }
@@ -152,6 +152,34 @@ class Parser {
     
     throw new ParseError(`Unexpected character: ${this.peek()}`, this.pos);
   }
+
+  private parseNamedSchema(): NamedSchema {
+    this.skipWhitespace();
+    
+    const startpos = this.pos;
+    let identifier = '';
+    
+    while (this.pos < this.input.length && /[a-zA-Z0-9\-_]/.test(this.peek())) {
+      identifier += this.consume();
+    }
+    
+    if (identifier.length === 0) {
+      throw new ParseError('Expected schema or named schema', this.pos);
+    }
+    
+    this.skipWhitespace();
+    
+    if (this.consumeStr(':')) {
+      this.skipWhitespace();
+      const name = identifier;
+      const schema = this.parseSchema();
+      return { name, schema };
+    } else {
+      this.pos = startpos;
+      const schema = this.parseSchema();
+      return { schema };
+    }
+  }
 }
 
 export function parseSchema(schemaString: string): Schema {

src/test.ts

@@ -18,6 +18,11 @@ const testCases = [
   { schema: 'string', value: 'hello\\[world', description: 'Escaped bracket' },
   { schema: 'string', value: 'hello\\\\world', description: 'Escaped backslash' },
   { schema: '[string; string]', value: 'hello\\;world; test', description: 'Tuple with escaped semicolon' },
+  { schema: '[x: number; y: number]', value: '[x: 10; y: 20]', description: 'Named tuple' },
+  { schema: '[x: number; y: number]', value: 'x: 10; y: 20', description: 'Named tuple without brackets' },
+  { schema: '[name: string; age: number; active: boolean]', value: '[name: Alice; age: 30; active: true]', description: 'Named tuple with mixed types' },
+  { schema: '[name: string; age: number]', value: 'name: Bob; age: 25', description: 'Named tuple without brackets' },
+  { schema: '[point: [x: number; y: number]]', value: '[point: [x: 5; y: 10]]', description: 'Nested named tuple' },
 ];
 
 testCases.forEach(({ schema, value, description }) => {

src/types.ts

@@ -4,9 +4,14 @@ export interface PrimitiveSchema {
   type: SchemaType;
 }
 
+export interface NamedSchema {
+  name?: string;
+  schema: Schema;
+}
+
 export interface TupleSchema {
   type: 'tuple';
-  elements: Schema[];
+  elements: NamedSchema[];
 }
 
 export interface ArraySchema {

src/validator.ts

@@ -1,4 +1,4 @@
-import type { Schema, PrimitiveSchema, TupleSchema, ArraySchema } from './types';
+import type { Schema, PrimitiveSchema, TupleSchema, ArraySchema, NamedSchema } from './types';
 import { ParseError } from './parser';
 
 class ValueParser {
@@ -114,7 +114,17 @@ class ValueParser {
     const result: unknown[] = [];
     for (let i = 0; i < schema.elements.length; i++) {
       this.skipWhitespace();
-      result.push(this.parseValue(schema.elements[i], false));
+      const elementSchema = schema.elements[i];
+      
+      if (elementSchema.name) {
+        this.skipWhitespace();
+        if (!this.consumeStr(`${elementSchema.name}:`)) {
+          throw new ParseError(`Expected ${elementSchema.name}:`, this.pos);
+        }
+        this.skipWhitespace();
+      }
+      
+      result.push(this.parseValue(elementSchema.schema, false));
       this.skipWhitespace();
 
       if (i < schema.elements.length - 1) {
@@ -216,7 +226,7 @@ export function createValidator(schema: Schema): (value: unknown) => boolean {
         if (!Array.isArray(value)) return false;
         if (value.length !== schema.elements.length) return false;
         return schema.elements.every((elementSchema, index) =>
-          createValidator(elementSchema)(value[index])
+          createValidator(elementSchema.schema)(value[index])
         );
       case 'array':
         if (!Array.isArray(value)) return false;