Prolog: new parser

[masatake]

Close #2628.

• improve the test coverage

[codecov]

Codecov Report

❌ Patch coverage is 94.86486% with 19 lines in your changes missing coverage. Please review.
✅ Project coverage is 85.98%. Comparing base (876e82a) to head (c99c2f4).
⚠️ Report is 7 commits behind head on master.

Files with missing lines	Patch %	Lines
parsers/prolog.c	96.81%	10 Missing ⚠️
main/tokeninfo.c	66.66%	9 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4249      +/-   ##
==========================================
+ Coverage   85.92%   85.98%   +0.06%     
==========================================
  Files         248      249       +1     
  Lines       63733    64102     +369     
==========================================
+ Hits        54765    55121     +356     
- Misses       8968     8981      +13     

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[Copilot]

Pull Request Overview

Adds a new Prolog parser to Universal Ctags, implementing comprehensive tag extraction for predicates, grammars, and modules in Prolog source files. The parser supports various Prolog syntax features including module-qualified atoms, DCG rules, string literals, and numeric literals.

• New Prolog parser with support for predicates, grammars, and modules
• Language selection mechanism to differentiate between Perl and Prolog files
• Integration with build system and test infrastructure

Reviewed Changes

Copilot reviewed 32 out of 32 changed files in this pull request and generated 7 comments.

Show a summary per file

File	Description
parsers/prolog.c	Main parser implementation with tokenizer and tag extraction
main/tokeninfo.c	Helper functions for token-based tag creation
main/tokeninfo.h	Header declarations for new token utilities
main/selectors.c	Language selection logic for Perl vs Prolog disambiguation
main/selectors.h	Header for language selector function
parsers/perl.c	Updated to use new language selector
main/parsers_p.h	Registration of Prolog parser
source.mak	Build system integration
win32/*	Visual Studio project files
docs/news/HEAD.rst	Documentation update
Units/parser-prolog.r/*	Test cases and expected outputs
misc/validators/validator-swipl	Validation script for SWI-Prolog
circle.yml	CI configuration update
Tmain/*	Updated test expectations

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[Copilot]

Pull Request Overview

Copilot reviewed 32 out of 32 changed files in this pull request and generated 3 comments.

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[Copilot]

Pull Request Overview

Copilot reviewed 36 out of 36 changed files in this pull request and generated 3 comments.

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[Copilot]

Pull Request Overview

Copilot reviewed 36 out of 36 changed files in this pull request and generated 1 comment.

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[Copilot]

Pull Request Overview

Copilot reviewed 36 out of 36 changed files in this pull request and generated 1 comment.

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[Copilot]

Pull Request Overview

Copilot reviewed 36 out of 36 changed files in this pull request and generated no new comments.

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