\grammarterm{} macro partially unconverted in definition contexts

[lefticus]

Problem

The \grammarterm{} macro is not being converted to italics in certain definition contexts. The LaTeX command appears as raw text in the output.

Location

File: n4950/intro.md
Lines: 440, 483

Current Behavior

Line 440:

⟨non-template friend function with trailing \grammarterm{requires-clause⟩

Line 483:

⟨\grammarterm{template-head⟩ template parameter list, excluding template

The \grammarterm{...} command appears as literal text instead of being converted to italics.

Expected Behavior

Line 440:

⟨non-template friend function with trailing *requires-clause*⟩

Line 483:

⟨*template-head*⟩ template parameter list, excluding template

The grammar term should be italicized using markdown *...* syntax.

Source Context

File: cplusplus-draft/source/intro.tex
Lines: 575-576, 628

\defnadj{target}{targets}%
\item \range{non-template friend function with trailing \grammarterm{requires-clause}}
\defnx{template parameter}{parameter!template}%
\item \range{\grammarterm{template-head}} template parameter list, excluding template

The \grammarterm{} macro is used within \range{} definitions.

Impact

• Severity: MAJOR
• Raw LaTeX macros appear in the visible output
• Makes the document look unprofessional
• Grammar terms should be distinguished from regular text
• Inconsistent with other \grammarterm{} conversions in the document (most work correctly)

Root Cause

The macro filter (cpp-macros.lua) is not handling \grammarterm{} when it appears within certain contexts, specifically:

1. Within \range{...} definitions
2. Possibly other definition-related contexts

This is a partial failure - most \grammarterm{} macros in the document convert correctly, but these specific instances within definition ranges do not.

Reproduction

1. Open n4950/intro.md
2. Navigate to line 440 or 483
3. Search for \grammarterm{
4. Observe the raw LaTeX macro in the output

Related Files

• src/cpp_std_converter/filters/cpp-macros.lua - Macro conversion logic
• src/cpp_std_converter/filters/cpp-definitions.lua - Definition processing
• May be related to the order of filter application or context-specific handling

Related Issues

• Similar to Issue \grammarterm{} not converted to italics in code blocks #10 (grammar terms not italicized in code blocks), but this is in prose/definition contexts
• Related to Issue \tcode{}, \keyword{}, and \term{} content silently dropped in definition notes #15 (content dropped in definition notes), suggesting definition-related contexts have special handling issues

[lefticus]

Fixed in commit e5d4d1c.

The issue was caused by two problems in cpp-definitions.lua:

1. Pattern [^}]* broke on nested braces - When extracting \defncontext{} content, the pattern stopped at the first }, so \defncontext{\grammarterm{requires-clause}} captured only \grammarterm{requires-clause (missing closing brace).

2. Context inserted as raw Str - Using pandoc.Str() created literal text that didn't process LaTeX macros.

Fix:

• Used extract_braced_content() from cpp-common.lua for balanced brace extraction
• Created build_context_inlines() to convert \grammarterm{term} to proper Pandoc Emph elements

Verification:

• Line 390: ⟨non-template friend function with trailing *requires-clause*⟩ ✓
• Line 436: ⟨*template-head*⟩ ✓

All 485 filter tests pass.