SQL: make foreign tags for 'interenal' functions

[masatake]

CREATE FUNCTION isnlt(ean13, ean13)
        RETURNS boolean
        AS 'int8lt'
        LANGUAGE 'internal'
        IMMUTABLE STRICT
        PARALLEL SAFE;

This change extracts int8lt as a function in the C language.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.01%. Comparing base (c71080d) to head (94a2a2a).
⚠️ Report is 6 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4240      +/-   ##
==========================================
+ Coverage   85.98%   86.01%   +0.02%     
==========================================
  Files         249      249              
  Lines       64102    64119      +17     
==========================================
+ Hits        55121    55154      +33     
+ Misses       8981     8965      -16     

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[Copilot]

Pull Request Overview

This PR adds support for creating foreign tags for PostgreSQL functions declared with LANGUAGE 'internal' or LANGUAGE internal. When such functions are encountered, the SQL parser now creates a foreign reference tag in the C language for the internal function name specified in the AS clause.

Key Changes:

• SQL parser now recognizes both quoted and unquoted 'internal' language declarations
• Internal function names (e.g., int8lt) are tagged as C function foreign calls
• New foreigncall role added to C parser's function kind

Reviewed Changes

Copilot reviewed 17 out of 17 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
parsers/sql.c	Adds logic to detect LANGUAGE 'internal' and create foreign C function tags; accepts both quoted and unquoted identifiers for language names
parsers/cxx/cxx_tag.h	Defines new CXXTagFUNCTIONRoleFOREIGNCALL enum value
parsers/cxx/cxx_tag.c	Adds foreigncall role definition for C functions
parsers/cxx/cxx.c	Bumps C parser version from 1.1 to 2.2
man/ctags-lang-c.7.rst.in	Documents the new foreigncall role in C parser changelog
docs/man/ctags-lang-c.7.rst	Generated documentation for the new role
Units/parser-sql.r/sql_pgSQL_with_language_internal.d/input.sql	Test input with PostgreSQL internal functions
Units/parser-sql.r/sql_pgSQL_with_language_internal.d/expected.tags	Expected output showing C foreign call tags
Units/parser-sql.r/sql_pgSQL_with_language_internal.d/args.ctags	Test configuration enabling reference tags
Units/parser-sql.r/funcions.d/expected.tags	Updated test expectations with new tag extras
Units/parser-sql.r/funcions.d/args.ctags	Added --extras=+g flag to test configuration
Tmain/version-option.d/stdout-expected.txt	Updated C parser version from 1.1 to 2.2
Tmain/nested-subparsers.d/stdout-expected.txt	Updated C function kind version from 1 to 2
Tmain/list-roles.d/stdout-expected.txt	Added foreigncall role entries throughout test output
Tmain/list-kinds-full.d/stdout-expected.txt	Updated C function kind version from 1 to 2
Tmain/json-output-format.d/stdout-expected.txt	Updated parser version and added foreigncall role description
Tmain/extras-field-for-pseudo-tags.d/stdout-expected.txt	Added foreigncall role description pseudo-tags

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[masatake]

Now we have version information for each kind, role, field, and extra. So the Changes section of the man pages is redundant.

[Copilot]

Pull Request Overview

Copilot reviewed 17 out of 17 changed files in this pull request and generated no new comments.

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