Add logInfo, logWarn, logError functions to filter expressions

[sdottaka]

Summary

Adds three logging functions (logInfo, logWarn, logError) to filter expressions for debugging purposes.

Changes

• New Functions:

  • logInfo(value1, value2, ...) - logs at information level
  • logWarn(value1, value2, ...) - logs at warning level
  • logError(value1, value2, ...) - logs at error level

• Features:

  • All arguments are converted to strings and concatenated with spaces
  • Returns the last argument value for use in filter expressions
  • Supports all value types including arrays, timestamps, file content refs

Usage Examples

• // Log and check file size logInfo("File size:", Size) > 1MB
• // Log processing with conditional Size > 1KB and logInfo("Large file:", Name) contains "test"
• // Log with multiple values logWarn("Processing:", Name) like "*.tmp"

[Copilot]

Pull request overview

This pull request adds three logging functions (logInfo, logWarn, logError) to WinMerge's filter expression system for debugging purposes. These functions concatenate and output their arguments to the log at different severity levels and return the last argument value, allowing them to be used inline within filter expressions.

Changes:

• Added C++ implementation of logging functions with string conversion support for various value types
• Updated logger signature to accept severity levels (error, warning, info)
• Added comprehensive documentation in English, Japanese, and Hebrew

Reviewed changes

Copilot reviewed 10 out of 10 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
Src/FilterEngine/FilterExpressionNodes.cpp	Implements ToStringValue helper and three logging functions (LogError, LogWarn, LogInfo) with function registration
Src/FilterEngine/FilterExpression.h	Updates logger signature to accept level parameter
Src/FilterEngine/FilterExpression.cpp	Updates logger calls to include level parameter
Src/DirDoc.cpp	Updates logger initialization to route messages by level
Translations/Docs/Manual/*.po	Updates translation files with new line number references
Docs/Manual/*/Filters.xml	Adds documentation for the new logging functions with examples

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