boolexpr

Documentation

Overview

Package boolexpr evaluates boolean expressions over integers. Used by ExpressionRecognition (OCR node placeholders) and IMS R1 (cached item IDs).

Index

• Variables
• func ClampInt(value float64) int
• func Evaluate(expression string) (any, error)
• func ParseIntLiteral(raw string) (int, error)
• func ResolvePlaceholders(expression string, resolve ResolveFunc) (string, map[string]int, error)
• type ResolveFunc

Variables

var (
	// PlaceholderPattern matches {name} tokens in an expression.
	PlaceholderPattern = regexp.MustCompile(`\{([^{}]+)\}`)

	IntMax = int(^uint(0) >> 1)
	IntMin = -IntMax - 1
)

Functions

func ClampInt

func ClampInt(value float64) int

ClampInt clamps a float64 into platform int range.

func Evaluate

func Evaluate(expression string) (any, error)

Evaluate parses and evaluates a boolean or integer expression. Callers that need a recognition hit must assert the result is bool.

func ParseIntLiteral

func ParseIntLiteral(raw string) (int, error)

ParseIntLiteral parses an integer literal; out-of-range values clamp to IntMax/IntMin.

func ResolvePlaceholders

func ResolvePlaceholders(expression string, resolve ResolveFunc) (string, map[string]int, error)

ResolvePlaceholders replaces every {name} in expression via resolve. Returns the numeric expression string and a map of placeholder → value.

Types

type ResolveFunc

type ResolveFunc func(name string) (int, error)

ResolveFunc maps a placeholder name to an integer value.