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2.5.2.1.1 Numeric Values

All numeric data values inherit VBNumericTypedValue. This common base simplifies implementing semantics that involve "any numeric type" specifications.

VBNumericTypedValue implements INumericValue, a non-generic base abstraction. INumericValue ensures every numeric type minimally has a double managed representation.

Numeric Data Values

A numeric data value can be one of the following:

Each intrinsic type stores its own exact managed type: a short for Integer and an int for Long, not one integer type for both.

👉 Because each intrinsic type stores its own managed type, the declared type is preserved across the dispatch of an external call. See RD-VBAL §6.1.2.11 Strings (Len / LenB).

Static Values

Each numeric value type minimally defines a typed representation of its MinValue, MaxValue and Zero. A numeric value type may define other static values as required by runtime semantics.

Significant Digits

Floating-point types also define a SignificantIntegerDigits. It is used to represent floating-point values correctly as VBStringValue in conversions and coercions to String; see RD-VBAL §5.5.1.2 Runtime semantics.

Value type VBType SignificantIntegerDigits
VBSingleValue VBSingleType 7
VBDoubleValue VBDoubleType 15

The SignificantIntegerDigits constant is declared on the VBType: VBSingleType.SignificantIntegerDigits and VBDoubleType.SignificantIntegerDigits.

Precompiler Constants

Precompiler constants are interpreted as Integer values. A precompiler constant value is an additional numeric data value:

Conditional compilation expressions are described in RD-VBAL §5.6.16 Constrained Expressions.

⏮️ RD-VBAL §2.5.2.1 Intrinsic Type Values | ⏭️ RD-VBAL §2.5.2.1.2 Array Values

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