[Nelson-numerical-software]

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Pull Request Overview

This PR adds support for ignoring function outputs using the tilde (~) syntax (e.g., [~, S, ~] = svd(A)), making Nelson compatible with MATLAB's syntax for unused outputs. This allows users to selectively capture only the outputs they need from multi-output functions.

Key changes:

• Enhanced the lexer to recognize and handle tilde placeholders in destructuring assignments
• Modified evaluator to skip variable assignment for placeholder identifiers
• Replaced manual "dummy" variables with tilde syntax throughout the codebase

Reviewed Changes

Copilot reviewed 18 out of 18 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
modules/interpreter/src/include/LexerContext.hpp	Added placeholder identifier tracking, constants, and helper function to identify placeholder variables
modules/interpreter/src/cpp/NelsonLexer.cpp	Implemented tilde detection logic including destructuring pattern recognition and placeholder generation
modules/interpreter/src/cpp/EvaluatorFunction.cpp	Modified multi-function call handling to skip variable insertion/display for placeholders
modules/interpreter/src/cpp/EvaluatorAssignment.cpp	Modified assignment to skip variable operations for placeholder identifiers
modules/interpreter/tests/test_tilde_output.m	Added comprehensive test cases covering valid/invalid tilde usage patterns
modules/interpreter/help/en_US/xml/ignore_outputs_function.xml	Added English documentation for the tilde syntax feature
modules/interpreter/help/fr_FR/xml/ignore_outputs_function.xml	Added French documentation for the tilde syntax feature
modules/statistics/functions/@tdigest/compress.m	Replaced dummy variable with tilde syntax
modules/random/functions/randperm.m	Replaced dummy variable with tilde syntax
modules/graphics/functions/spy.m	Replaced void variable with tilde syntax
modules/control_system/functions/*.m	Replaced dummy/void variables with tilde syntax across multiple files
CHANGELOG.md	Documented the new feature

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