diff options
Diffstat (limited to 'Master/texmf-dist/source/latex/l3kernel/l3tl.dtx')
-rw-r--r-- | Master/texmf-dist/source/latex/l3kernel/l3tl.dtx | 31 |
1 files changed, 27 insertions, 4 deletions
diff --git a/Master/texmf-dist/source/latex/l3kernel/l3tl.dtx b/Master/texmf-dist/source/latex/l3kernel/l3tl.dtx index 9fa0a297d51..51fcddc242e 100644 --- a/Master/texmf-dist/source/latex/l3kernel/l3tl.dtx +++ b/Master/texmf-dist/source/latex/l3kernel/l3tl.dtx @@ -35,7 +35,7 @@ % %<*driver|package> \RequirePackage{l3names} -\GetIdInfo$Id: l3tl.dtx 3460 2012-02-26 12:16:41Z will $ +\GetIdInfo$Id: l3tl.dtx 3490 2012-03-04 01:00:53Z bruno $ {L3 Experimental token lists} %</driver|package> %<*driver> @@ -154,6 +154,15 @@ % \meta{tl~var2}. % \end{function} % +% \begin{function}[EXP, pTF, added=2012-03-03]{\tl_if_exist:N, \tl_if_exist:c} +% \begin{syntax} +% \cs{tl_if_exist_p:N} \meta{tl~var} +% \cs{tl_if_exist:NTF} \meta{tl~var} \Arg{true code} \Arg{false code} +% \end{syntax} +% Tests whether the \meta{tl~var} is currently defined. This does not +% check that the \meta{tl~var} really is a token list variable. +% \end{function} +% % \section{Adding data to token list variables} % % \begin{function} @@ -1100,9 +1109,9 @@ % Error checking will be sorted out by the parent function. % \begin{macrocode} \cs_new_protected:Npn \tl_clear_new:N #1 - { \cs_if_exist:NTF #1 { \tl_clear:N #1 } { \tl_new:N #1 } } + { \tl_if_exist:NTF #1 { \tl_clear:N #1 } { \tl_new:N #1 } } \cs_new_protected:Npn \tl_gclear_new:N #1 - { \cs_if_exist:NTF #1 { \tl_gclear:N #1 } { \tl_new:N #1 } } + { \tl_if_exist:NTF #1 { \tl_gclear:N #1 } { \tl_new:N #1 } } \cs_generate_variant:Nn \tl_clear_new:N { c } \cs_generate_variant:Nn \tl_gclear_new:N { c } % \end{macrocode} @@ -1125,6 +1134,20 @@ % \end{macro} % \end{macro} % +% \begin{macro}[pTF]{\tl_if_exist:N, \tl_if_exist:c} +% Copies of the \texttt{cs} functions defined in \pkg{l3basics}. +% \begin{macrocode} +\cs_new_eq:NN \tl_if_exist:NTF \cs_if_exist:NTF +\cs_new_eq:NN \tl_if_exist:NT \cs_if_exist:NT +\cs_new_eq:NN \tl_if_exist:NF \cs_if_exist:NF +\cs_new_eq:NN \tl_if_exist_p:N \cs_if_exist_p:N +\cs_new_eq:NN \tl_if_exist:cTF \cs_if_exist:cTF +\cs_new_eq:NN \tl_if_exist:cT \cs_if_exist:cT +\cs_new_eq:NN \tl_if_exist:cF \cs_if_exist:cF +\cs_new_eq:NN \tl_if_exist_p:c \cs_if_exist_p:c +% \end{macrocode} +% \end{macro} +% % \subsection{Adding to token list variables} % % \begin{macro} @@ -1787,7 +1810,7 @@ % \begin{macrocode} \cs_new:Npn \tl_use:N #1 { - \cs_if_exist:NTF #1 {#1} + \tl_if_exist:NTF #1 {#1} { \msg_expandable_kernel_error:nnn { kernel } { bad-var } {#1} } } \cs_generate_variant:Nn \tl_use:N { c } |