uCalc SDK Interactive Examples

Practical: Modifies the default alphanumeric token to include hyphens, allowing it to match hyphenated identifiers as single words.

Practical: Re-categorizes the newline token as whitespace to allow a pattern to match across multiple lines, a common requirement for parsing HTML or XML.

Practical: Re-filters a result set to show only 'focusable' matches without re-running the search.

Practical: Shows how disabling statement sensitivity is essential for parsing multi-line HTML/XML blocks.

Practical: Traces the recursive expansion of a custom `MySum` function, showing how it is broken down into a standard arithmetic expression.

Practical: Using the C++ style `Format()` function for currency and text alignment.

Practical: Validates a configuration file format by enforcing the number of times specific keys must appear.

Practical: Validating log file entries. If more than 2 'WARNING' entries exist, they are ignored, but 'ERROR' entries are still processed.

Processes a log file but stops after finding the first error message to focus on the initial problem.

Quick Start

Quick Start: Getting and Setting the Default Type

Quick Start: Inspects the regex pattern for a single, common token type (alphanumeric identifiers).

Quickly defines the mathematical constant pi (MY_PI) and uses it in a simple calculation.

Quickly evaluates several basic mathematical and function-based expressions.

QuoteSensitive

RaiseErrorOnDivideByZero

Raises an error in a callback using a customized message with ErrorRaiseMessage

Raises an error with a dynamic message if a validation check fails within a callback.

Raising an error in a callback with ErrorRaise

Raising floating point errors with FloatingPointErrorsToTrap

Recursive Nesting: Alternation -> Optional -> Alternation.

Registers a handler to log when division by zero occurs.

Renames the Cos function (which is in Radian) to CosR and defines Cos in Degrees

Replacement()

Replacing all horizontal whitespace with a visible underscore for debugging.

Replacing all platform-specific newlines with a generic visible tag.

Replacing double quotes with single quotes.

Retrieves a built-in token by its name and inspects its regex pattern.

Retrieves a double-precision value from a pointer, with and without formatting.

Retrieves a Tokens collection's parent uCalc instance and verifies its identity by reading a description.

Retrieves and displays the name of a built-in data type.

Retrieves the full definition string for a user-defined function.

Retrieves the generic message for a specific error code and compares it to the last error message.

Retrieves the primary alphanumeric token definition using `ByType`.

Retrieving the element count of an array and the parameter count of a function.

Retrieving the precedence levels of built-in arithmetic operators to compare their binding strength.

Retrieving the text of the first match found in a simple search.

Return and other type-specific versions of Return

Returning a pointer with ReturnPtr

Returning a string (from a callback)

Returning the data type of an expression

Returns Start and End positions of Transformer matches

Returns Start and End positions of Transformer matches

Returns the default list of tokens (index, description, name, regex) in a transformer

RewindOnChange

Rule Name

Rule NextOverload and Tag

Rule StartAfter()

Rule uCalc

RulePatternTransformer

Safely renames a variable without corrupting a string literal, demonstrating the Transformer's token-awareness.

Sample example

Searching for two different words in parallel.

Sets a data type as the default

Sets and retrieves a description for the main uCalc object.

Sets the default data type to `Int32` for implicit variable definitions.

SetScalar

Setting a token data type

Setting a variable value by pointer

Setting and retrieving a description for a single variable Item.