[groff] 14/24: [troff]: Slightly refactor `has_arg()`.

[G. Branden Robinson]

gbranden pushed a commit to branch master
in repository groff.

commit 497e7294ddfe7b020bb7262338a38231c2576bfa
Author: G. Branden Robinson <g.branden.robinson@gmail.com>
AuthorDate: Sat Nov 9 10:55:20 2024 -0600

    [troff]: Slightly refactor `has_arg()`.
    
    * src/roff/troff/input.cpp (has_args): Slightly refactor; use the same
      expression to compute the return value after having advaced the input
      pointer through spaces as is used at the top of the function.
---
 ChangeLog                | 7 +++++++
 src/roff/troff/input.cpp | 8 +++++++-
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/ChangeLog b/ChangeLog
index dbfbff457..4f5f531fa 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2024-11-09  G. Branden Robinson <g.branden.robinson@gmail.com>
+
+       * src/roff/troff/input.cpp (has_args): Slightly refactor; use
+       the same expression to compute the return value after having
+       advaced the input pointer through spaces as is used at the top
+       of the function.
+
 2024-11-09  G. Branden Robinson <g.branden.robinson@gmail.com>
 
        * src/roff/troff/env.cpp (add_hyphenation_exceptions):
diff --git a/src/roff/troff/input.cpp b/src/roff/troff/input.cpp
index 541797756..d330ba91a 100644
--- a/src/roff/troff/input.cpp
+++ b/src/roff/troff/input.cpp
@@ -1901,6 +1901,12 @@ void token::skip()
     next();
 }
 
+// Indicate whether an argument lies ahead on the current line in the
+// input stream, skipping over spaces.  This function is therefore not
+// appropriate for use when handling requests or escape sequences that
+// don't use space to separate their arguments, as with `.tr aAbB` or
+// `\o'^e'`.
+//
 // Specify `want_peek` if request reads the next argument in copy mode,
 // or otherwise must interpret it specially, as when reading a
 // conditional expression (`if`, `ie`, `while`), or expecting a
@@ -1923,7 +1929,7 @@ bool has_arg(bool want_peek)
   else {
     while (tok.is_space())
       tok.next();
-    return !tok.is_newline();
+    return !(tok.is_newline() || tok.is_eof());
   }
 }