LaTeX reader: improve handling of plain TeX macro primitives.

- Fixed semantics for `\let`.
- Implement `\edef`, `\gdef`, and `\xdef`.
- Add comment noting that currently `\def` and `\edef` set global
  macros (so are equivalent to `\gdef` and `\xdef`).  This should be
  fixed by scoping macro definitions to groups, in a future commit.

Closes #7474.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/Text/Pandoc/Readers/LaTeX/Parsing.hs b/src/Text/Pandoc/Readers/LaTeX/Parsing.hs
index 9dac4d6ef..8d6791abb 100644
--- a/src/Text/Pandoc/Readers/LaTeX/Parsing.hs
+++ b/src/Text/Pandoc/Readers/LaTeX/Parsing.hs
@@ -267,7 +267,7 @@ rawLaTeXParser toks retokenize parser valParser = do
        Right (endpos, toks') -> do
          res <- lift $ runParserT (do when retokenize $ do
                                         -- retokenize, applying macros
-                                        ts <- many (satisfyTok (const True))
+                                        ts <- many anyTok
                                         setInput ts
                                       rawparser)
                         lstate' "chunk" toks'
@@ -296,7 +296,7 @@ rawLaTeXParser toks retokenize parser valParser = do
 applyMacros :: (PandocMonad m, HasMacros s, HasReaderOptions s)
             => Text -> ParserT Sources s m Text
 applyMacros s = (guardDisabled Ext_latex_macros >> return s) <|>
-   do let retokenize = untokenize <$> many (satisfyTok (const True))
+   do let retokenize = untokenize <$> many anyTok
       pstate <- getState
       let lstate = def{ sOptions = extractReaderOptions pstate
                       , sMacros  = extractMacros pstate }