uCalc API Version: 2.1.3-preview.2 Released: 6/17/2026

Warning

uCalc API Preview Release Notice:The documentation describes the intended behavior of the API. The current preview build contains incomplete features, unoptimized performance, and is subject to breaking changes.

Specialized

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Remarks

⚠️ Error & State‑Reset Functions

Function	Description
`Error(int) As Int`	Triggers an error using a numeric code. Returns an `ErrorHandlerResponse` enum value (0, 1, or 2).
`Error(string) As Int`	Triggers an error with a custom message. Returns an `ErrorHandlerResponse` enum value.
`Swap(ByHandle AnyType, ByHandle AnyType)`	Swaps the values of two variables by reference. No return value.
`Reset(ByHandle AnyType)`	Resets a variable to its default value (0 for numeric types, empty for strings, etc.). No return value.

🧭 Pointer & Memory‑Like Operations

Function	Description
`AddressOf(ByHandle AnyType) As SameTypeAs:0 Ptr`	Returns a pointer to the variable’s storage location.
`ValueAt(ByHandle AnyType Ptr, size_t = 0) As SameTypeAs:0`	Dereferences a typed pointer at the given index (pointer + index).
`ValueAtType(ByHandle AnyType, Pointer, size_t = 0) As SameTypeAs:0`	Dereferences a raw pointer using a specified data type.
`AddPtr(ByHandle AnyType, size_t = 1) As SameTypeAs:0`	Performs pointer arithmetic and returns the resulting pointer.
`SubtractPtr(ByHandle AnyType, size_t = 1) As SameTypeAs:0`	Same as `AddPtr` but subtracts the offset.
`SetVar(ByRef AnyType, SameTypeAs:0) As SameTypeAs:0`	Assigns a value to a variable by reference and returns the assigned value.

🧮 Conditional Functions

Function	Description
`IIf(bool, ByExpr AnyType, ByExpr SameTypeAs:1) As SameTypeAs:1`	Immediate‑if expression; evaluates only the selected branch.
`IIf(bool, ByExpr string, ByExpr string = …) As String`	String‑specific overload.
`IIf(bool, ByExpr Complex, ByExpr Complex) As Complex`	Complex‑number overload.

🧩 Argument Introspection & Expression Evaluation

Function	Description
`Arg(size_t)`	Returns the nth argument passed to the current function or expression.
`ArgCount() As Size_t`	Returns the number of arguments passed.
`Parse(string, string = "")`	Parses an expression using an optional data‑type string. Returns a pointer to the parsed expression.
`Eval(string)`	Evaluates an expression and returns a numeric result.
`EvalStr(string, bool = True) As String`	Evaluates an expression and returns a formatted string.
`Evaluate(Pointer) As Double`	Evaluates a previously parsed expression via pointer.
`EvaluateInt(Pointer) As Int`	Evaluates a parsed expression and returns an integer.
`EvaluateStr(Pointer, bool = True) As String`	Evaluates a parsed expression and returns a formatted string.

🔄 Expression & Environment Manipulation

Function	Description
`FromTo(string, string, bool = True)`	Defines a rewrite rule using uCalc’s pattern‑based transformer. Can be temporary or permanent.
`ExprPtr(AnyType) As Pointer`	Returns a pointer to the internal representation of an expression or value.
`Define(string, Pointer = 0, Pointer = 0)`	Defines a variable, operator, or function. Parameters: definition string, optional address, optional datatype handle.
`uCalcInstance() As Pointer`	Returns a pointer/handle to the current uCalc engine instance.
`Precedence(string, int64_t) As size_t`	Returns the precedence level of an operator.

🔁 Looping Constructs

Function	Description
`DoLoop(ByExpr bool, ByExpr AnyType, ByExpr bool = True) As Void`	Executes a do/loop construct inside an expression.
`ForLoop(ByHandle Counter, Start, Finish, Step, ByExpr AnyType)`	Executes a for‑loop with a counter variable and an expression body.

🔢 Numeric Utilities

Function	Description
`BaseConvert(string, int)`	Converts a number string from one base to another.
`Sgn(Number)`	Returns −1, 0, or +1 depending on the sign of the number.
`Inf() = 1/0`	Returns positive infinity.
`NaN() = 0/0`	Returns a NaN value.

Examples