Function format_validation_error 

pub fn format_validation_error(
    code: &str,
    file_path: &str,
    error_kind: &str,
    line_num: usize,
    col_num: usize,
    message: &str,
    help: &str,
    underline_length: usize,
) -> String

Format a validation error with beautiful Rust/Gleam-style output

This function creates consistent error messages across all Tana systems:

• tana-runtime (native Rust)
• tana-edge (native Rust)
• playground (WASM in browser)
• CLI tools (WASM in Bun/Node)

Arguments

• code - The source code containing the error
• file_path - Path to the file (e.g., “contract.ts”)
• error_kind - Category of error (e.g., “Invalid Import”, “Type Error”)
• line_num - Line number (1-indexed)
• col_num - Column number (1-indexed)
• message - Error message
• help - Help text explaining how to fix
• underline_length - Number of characters to underline (for ^^^)

Example

use tana_validation::format_validation_error;

let error = format_validation_error(
    "import { console } from 'tana/invalid';",
    "contract.ts",
    "Invalid Import",
    1,
    26,
    "Module 'tana/invalid' not found",
    "Available modules: tana/core, tana/kv, tana/block",
    12
);

// Produces:
// Validation Error
// ❌ Invalid Import
//
// ┌─ contract.ts:1:26
// │
//   1 │ import { console } from 'tana/invalid';
//     │                          ^^^^^^^^^^^^ Module 'tana/invalid' not found
// │
// = help: Available modules: tana/core, tana/kv, tana/block
// │
// └─