uCalc Fast Math Parser &
Token-Aware Text Transformer
The unified parsing and text transformation SDK for modern C++, C#, and VB.NET.
- Windows (32-bit, 64-bit, arm64 Copilot+PC)
- macOS (Intel x64, arm64 M-series)
- Linux (x64, arm64)
Fast Math Parser
A high-performance, cross-platform engine to easily parse and evaluate complex mathematical expressions rapidly.
Text Transformer
Go beyond regex. Transform code and text using advanced yet intuitive, token-aware structural parsing and syntax manipulation.
Advanced String Library
A comprehensive string manipulation library for smart text processing operations.
A quick start example showing defining a variable, a function, and evaluating an expression.
ID: 1296
using uCalcSoftware;
var uc = new uCalc();
uc.DefineVariable("x = 10");
uc.DefineFunction("DoubleThis(n) = n * 2");
Console.WriteLine(uc.Eval("DoubleThis(x) + 5"));
25
#include <iostream>
#include "uCalc.h"
using namespace std;
using namespace uCalcSoftware;
int main() {
uCalc uc;
uc.DefineVariable("x = 10");
uc.DefineFunction("DoubleThis(n) = n * 2");
cout << uc.Eval("DoubleThis(x) + 5") << endl;
}
25
Imports System
Imports uCalcSoftware
Public Module Program
Public Sub Main()
Dim uc As New uCalc()
uc.DefineVariable("x = 10")
uc.DefineFunction("DoubleThis(n) = n * 2")
Console.WriteLine(uc.Eval("DoubleThis(x) + 5"))
End Sub
End Module
25Evaluate pre-parsed expressions rapidly
Achieve rapid execution speeds. uCalc separates the heavy lifting of parsing from the execution with its "Parse-Once, Evaluate-Many" architecture, making it blazing fast inside tight loops.
⚡ Benchmarking Tip: Clicking "Run" in this online example includes the overhead of network routing and remote compilation. To see the actual evaluation speed (which is near-instantaneous regardless of loop size), uncomment the StopWatch line to print the exact execution time of the loop itself, excluding online overhead.
Note: If you think the preview version is fast, wait until the optimized production release comes out.
Using the parse-evaluate pattern for high-performance calculations in a loop with a changing variable w/ stopwatch.
ID: 1460
using uCalcSoftware;
var uc = new uCalc();
var variableX = uc.DefineVariable("x");
var userExpression = "x * 2 + 5";
var Total = 0.0;
var UpperBound = 1000000; // One million
// Parse the expression just once before the loop begins.
var parsedExpr = uc.Parse(userExpression);
var stopwatch = System.Diagnostics.Stopwatch.StartNew();
for (double x = 1; x <= UpperBound; x++) {
variableX.Value(x);
Total = Total + parsedExpr.Evaluate();
}
stopwatch.Stop();
//Uncomment the following line to reveal the actual speed:
//Console.WriteLine($"Elapsed Milliseconds: {stopwatch.ElapsedMilliseconds} ms");
Console.Write("Sum(1, "); Console.Write(UpperBound); Console.Write(", "); Console.Write(userExpression); Console.Write(") = "); Console.Write(Total);
Sum(1, 1000000, x * 2 + 5) = 1000006000000
#include <iostream>
#include "uCalc.h"
using namespace std;
using namespace uCalcSoftware;
int main() {
uCalc uc;
auto variableX = uc.DefineVariable("x");
auto userExpression = "x * 2 + 5";
auto Total = 0.0;
auto UpperBound = 1000000; // One million
// Parse the expression just once before the loop begins.
auto parsedExpr = uc.Parse(userExpression);
for (double x = 1; x <= UpperBound; x++) {
variableX.Value(x);
Total = Total + parsedExpr.Evaluate();
}
cout << "Sum(1, " << UpperBound << ", " << userExpression << ") = " << (long long)Total;
}
Sum(1, 1000000, x * 2 + 5) = 1000006000000
Imports System
Imports uCalcSoftware
Public Module Program
Public Sub Main()
Dim uc As New uCalc()
Dim variableX = uc.DefineVariable("x")
Dim userExpression = "x * 2 + 5"
Dim Total = 0.0
Dim UpperBound = 1000000 '// One million
'// Parse the expression just once before the loop begins.
Dim parsedExpr = uc.Parse(userExpression)
Dim stopwatch = System.Diagnostics.Stopwatch.StartNew()
For x As Double = 1 To UpperBound
variableX.Value(x)
Total = Total + parsedExpr.Evaluate()
Next
stopwatch.Stop()
'//Uncomment the following line to reveal the actual speed:
'//Console.WriteLine($"Elapsed Milliseconds: {stopwatch.ElapsedMilliseconds} ms");
Console.Write("Sum(1, ")
Console.Write(UpperBound)
Console.Write(", ")
Console.Write(userExpression)
Console.Write(") = ")
Console.Write(Total)
End Sub
End Module
Sum(1, 1000000, x * 2 + 5) = 1000006000000A single-pass transformer that converts headers, list items, bold, and italic Markdown syntax to HTML.
ID: 1404
using uCalcSoftware;
var uc = new uCalc();
using (var t = new uCalc.Transformer()) {
t.DefaultRuleSet.RewindOnChange = true;
// 2. Define Rules (General rules first, specific rules last for LIFO precedence)
// -- Inline rules --
// Italic is defined before Bold, giving Bold higher precedence.
t.FromTo("*{text}*", "<i>{text}</i>");
t.FromTo("**{text}**", "<b>{text}</b>");
// -- Block-level rules --
t.FromTo("#{@Whitespace}{line}", "<h1>{line}</h1>");
t.FromTo("*{@Whitespace}{line}", "<li>{line}</li>");
t.FromTo("</li>{@nl}{@nl}", "</li>{@nl}</ul>{@nl}"); // {@nl} = NewLine
t.FromTo("{@nl}{@nl}*{@Whitespace}", "{@nl}<ul>{@nl}* ");
// 3. Define the input Markdown text
var markdown = """
# Main Header
* First list item
* Second list item with **bold** text.
* Third list item with *italic* text.
Another paragraph with **bold** and *italic*.
""";
// 4. Run the transformation and print the result
Console.WriteLine(t.Transform(markdown));
}
<h1>Main Header</h1>
<ul>
<li>First list item</li>
<li>Second list item with <b>bold</b> text.</li>
<li>Third list item with <i>italic</i> text.</li>
</ul>
Another paragraph with <b>bold</b> and <i>italic</i>.
#include <iostream>
#include "uCalc.h"
using namespace std;
using namespace uCalcSoftware;
int main() {
uCalc uc;
{
uCalc::Transformer t;
t.Owned(); // Causes t to be released when it goes out of scope
t.DefaultRuleSet().RewindOnChange(true);
// 2. Define Rules (General rules first, specific rules last for LIFO precedence)
// -- Inline rules --
// Italic is defined before Bold, giving Bold higher precedence.
t.FromTo("*{text}*", "<i>{text}</i>");
t.FromTo("**{text}**", "<b>{text}</b>");
// -- Block-level rules --
t.FromTo("#{@Whitespace}{line}", "<h1>{line}</h1>");
t.FromTo("*{@Whitespace}{line}", "<li>{line}</li>");
t.FromTo("</li>{@nl}{@nl}", "</li>{@nl}</ul>{@nl}"); // {@nl} = NewLine
t.FromTo("{@nl}{@nl}*{@Whitespace}", "{@nl}<ul>{@nl}* ");
// 3. Define the input Markdown text
auto markdown = R"(
# Main Header
* First list item
* Second list item with **bold** text.
* Third list item with *italic* text.
Another paragraph with **bold** and *italic*.
)";
// 4. Run the transformation and print the result
cout << t.Transform(markdown) << endl;
}
}
<h1>Main Header</h1>
<ul>
<li>First list item</li>
<li>Second list item with <b>bold</b> text.</li>
<li>Third list item with <i>italic</i> text.</li>
</ul>
Another paragraph with <b>bold</b> and <i>italic</i>.
Imports System
Imports uCalcSoftware
Public Module Program
Public Sub Main()
Dim uc As New uCalc()
Using t As New uCalc.Transformer()
t.DefaultRuleSet.RewindOnChange = true
'// 2. Define Rules (General rules first, specific rules last for LIFO precedence)
'// -- Inline rules --
'// Italic is defined before Bold, giving Bold higher precedence.
t.FromTo("*{text}*", "<i>{text}</i>")
t.FromTo("**{text}**", "<b>{text}</b>")
'// -- Block-level rules --
t.FromTo("#{@Whitespace}{line}", "<h1>{line}</h1>")
t.FromTo("*{@Whitespace}{line}", "<li>{line}</li>")
t.FromTo("</li>{@nl}{@nl}", "</li>{@nl}</ul>{@nl}") '// {@nl} = NewLine
t.FromTo("{@nl}{@nl}*{@Whitespace}", "{@nl}<ul>{@nl}* ")
'// 3. Define the input Markdown text
Dim markdown = "
# Main Header
* First list item
* Second list item with **bold** text.
* Third list item with *italic* text.
Another paragraph with **bold** and *italic*.
"
'// 4. Run the transformation and print the result
Console.WriteLine(t.Transform(markdown))
End Using
End Sub
End Module
<h1>Main Header</h1>
<ul>
<li>First list item</li>
<li>Second list item with <b>bold</b> text.</li>
<li>Third list item with <i>italic</i> text.</li>
</ul>
Another paragraph with <b>bold</b> and <i>italic</i>.Parse text the intuitive way
Ditch complicated character-based RegEx patterns and use uCalc's smart approach to transforming text with token-aware parsing that understands the structure of your text.
Dive deeper by clicking one of the following step-by-step guides to building a real-world project.
Project: Building a Markdown to HTML Converter
Build a simple Markdown-to-HTML converter using the declarative rules of the uCalc Transformer.
Project: Building a JSON Formatter and Minifier
Build a simple parser for INI-style configuration files using the uCalc Transformer's hierarchical parsing capabilities.
Project: Creating a Simple DSL for Financial Transactions
Build a simple, readable Domain-Specific Language (DSL) for processing financial transactions using the ExpressionTransformer.
Project: A Unit Conversion DSL
Build a simple, readable Domain-Specific Language (DSL) for unit conversions using the ExpressionTransformer.
Project: Implementing a Custom Syntax Highlighter
Build a static analysis tool (linter) to enforce coding standards on a custom scripting language using the uCalc Transformer.
Project: Extracting and Aggregating Metrics from Server Logs
Build a server log parser that extracts and aggregates key performance metrics using the uCalc Transformer.
Tools Built with uCalc
Transformer Desktop App
A standalone tool for heavy-duty text and code transformation using intuitive patterns.
Console Calculator
A lightweight command-line calculator. Perfect for power users.
Visual Studio Extension
Integrate the token-aware search and transformer tool directly into your IDE.