\\grammarterm{}{text} with empty first argument causes malformed output

[lefticus]

Problem

The LaTeX pattern \\grammarterm{}{statement}{s} (with an empty first argument) in n3337 and n4140 source files causes malformed output in the converted markdown.

Affected Files

• n3337/stmt.md line 97
• n4140/stmt.md (multiple instances)

Expected Output

*statements* (italicized text)

Actual Output

**statement or \*\*{statement}{s} (garbled with raw LaTeX artifacts)

Root Cause

The empty first argument to \\grammarterm{}{}{} is malformed LaTeX that exists in the n3337 (C++11) and n4140 (C++14) source files. The current macro handler doesn't gracefully handle this edge case, leaving raw LaTeX escapes in the output.

Example from n3337/stmt.md line 97:

the contained **statement or \*\*{statement}{s} that appear in the

This should read: "the contained statement or statements that appear in the"

Scope

• Affects: n3337 (C++11) and n4140 (C++14)
• Does NOT affect: n4950 (C++23) and later - those sources don't have this malformed pattern

Severity

MAJOR - Text is garbled and unreadable in affected files.

Related Issues

• \grammarterm{} macro partially unconverted in definition contexts #16 - \\grammarterm{} macro partially unconverted in definition contexts
• \grammarterm{} not converted to italics in code blocks #10 - \\grammarterm{} not converted to italics in code blocks
• \grammartermnc{} grammar terminal macro not converted #50 - \\grammartermnc{} grammar terminal macro not converted

[lefticus]

Fixed in commit b362494

The \grammarterm{}{term} pattern with empty first argument now converts correctly to term.

Solution:

• Modified cpp-macros.lua to handle empty first argument cases
• Pattern \grammarterm{}{statement} now renders as *statement*
• Pattern \grammarterm{}{statement}{s} now renders as *statement*s (consistent with normal plural handling)

Testing:

• Added 3 unit tests covering all empty-arg patterns
• All 618 tests pass
• Fixed 64 lines in n3337/stmt.md and 48 lines in n4140/stmt.md