Parseasy

Parseasy is a modern and efficient alternative to Regex for text pattern matching and extraction in .NET applications. It provides a simple, type-safe API for parsing text based on patterns with typed placeholders.

Features

• Type-safe parsing: Extract values with automatic type conversion
• Simple pattern syntax: Use intuitive placeholders like {name:string}, {age:int}
• Performance optimized: Compiled patterns and efficient memory usage
• Thread-safe: Safe to use in multi-threaded applications
• Comprehensive API: TryParse, Parse, IsMatch, and FindAllMatches methods

Installation

dotnet add package Parseasy

Usage

Basic Parsing

using Parseasy;

string input = "Name: John, Age: 30";
string pattern = "Name: {name:string}, Age: {age:int}";

if (Parser.TryParse(input, pattern, out var result))
{
    string name = result.GetValue<string>("name");
    int age = result.GetValue<int>("age");
    Console.WriteLine($"Name: {name}, Age: {age}");
}

Parse Method (with Exception Handling)

try
{
    var result = Parser.Parse(input, pattern);
    string name = result.GetValue<string>("name");
    int age = result.GetValue<int>("age");
    Console.WriteLine($"Name: {name}, Age: {age}");
}
catch (ParseException ex)
{
    Console.WriteLine($"Parsing failed: {ex.Message}");
}

Checking if a String Matches a Pattern

if (Parser.IsMatch(input, pattern))
{
    Console.WriteLine("Input matches the pattern.");
}

Finding All Matches

string input = "Name: John, Age: 30\nName: Jane, Age: 25";
string pattern = "Name: {name:string}, Age: {age:int}";

var matches = Parser.FindAllMatches(input, pattern);
foreach (var match in matches)
{
    string name = match.GetValue<string>("name");
    int age = match.GetValue<int>("age");
    Console.WriteLine($"Name: {name}, Age: {age}");
}

string input = @"
# Server Configuration
host=192.168.1.10
port=8080
max_connections=100

# Database Configuration
db_host=localhost
db_port=5432
db_name=myapp
db_user=admin
";
string pattern = "{key:string}={value:string}";

var matches = Parser.FindAllMatches(input, pattern);
foreach (var entry in configEntries)
{
    string key = entry.GetValue<string>("key");
    string value = entry.GetValue<string>("value");
    config[key] = value;
    Console.WriteLine($"  {key} = {value}");
}

Supported Types

Parseasy supports the following types in placeholders:

• string: Any text
• int: Integer numbers
• decimal, double, float: Floating-point numbers
• bool: Boolean values (true/false)
• date, datetime: Date and time values
• guid: GUID values
• email: Email addresses
• url: URLs
• phone: Phone numbers
• ip: IP addresses

Performance Considerations

• Patterns are compiled and cached for optimal performance
• Memory usage is minimized by reusing pattern objects
• Thread-safe implementation for concurrent access

License

MIT