Function validate 

pub fn validate(file: &str, strict: bool) -> Result<(), String>

Validate a HEDL file for syntax and structural correctness.

Parses a HEDL file and reports whether it is syntactically valid. In strict mode, all entity references must resolve to defined entities.

Arguments

• file - Path to the HEDL file to validate
• strict - If true, enables strict reference validation (all references must resolve)

Returns

Returns Ok(()) if the file is valid, Err with a descriptive error message otherwise.

Errors

Returns Err if:

• The file cannot be read
• The file contains syntax errors
• In strict mode, if any entity references cannot be resolved

Examples

use hedl_cli::commands::validate;

// Validate a well-formed HEDL file
validate("valid.hedl", false)?;

// Strict validation requires all references to resolve
validate("references.hedl", true)?;

// Invalid syntax will fail
let result = validate("invalid.hedl", false);
assert!(result.is_err());

Output

Prints a summary to stdout including:

• File validation status (✓ or ✗)
• HEDL version
• Count of structs, aliases, and nests
• Strict mode indicator if enabled