diff options
Diffstat (limited to 'Master/texmf-dist')
| -rw-r--r-- | Master/texmf-dist/doc/plain/xintsession/README.md | 2 | ||||
| -rw-r--r-- | Master/texmf-dist/tex/plain/xintsession/xintsession.tex | 142 |
2 files changed, 64 insertions, 80 deletions
diff --git a/Master/texmf-dist/doc/plain/xintsession/README.md b/Master/texmf-dist/doc/plain/xintsession/README.md index c5bdd6b7b9f..5df362a399b 100644 --- a/Master/texmf-dist/doc/plain/xintsession/README.md +++ b/Master/texmf-dist/doc/plain/xintsession/README.md @@ -1,6 +1,6 @@ # xintsession README # -Release: 0.2 (2021-05-05) +Release: 0.2a (2021-05-06) ## Usage ## diff --git a/Master/texmf-dist/tex/plain/xintsession/xintsession.tex b/Master/texmf-dist/tex/plain/xintsession/xintsession.tex index aa0e8540d21..4bc478e85cb 100644 --- a/Master/texmf-dist/tex/plain/xintsession/xintsession.tex +++ b/Master/texmf-dist/tex/plain/xintsession/xintsession.tex @@ -1,4 +1,4 @@ -% Release 0.2 (2021-05-05) of xintsession.tex +% Release 0.2a (2021-05-06) of xintsession.tex % author: Jean-Francois Burnol % License: LPPL 1.3c (author-maintained) % Usage: execute etex or pdftex @@ -47,7 +47,7 @@ ___(_)________ /__________________ ________ /___(_)__ ______ __ /__ __ \ __/ _ \_ ___/ __ `/ ___/ __/_ /__ | / / _ \ _ / _ / / / /_ / __/ / / /_/ // /__ / /_ _ / __ |/ // __/ - /_/ /_/ /_/\__/ \___//_/ \__,_/ \___/ \__/ /_/ _____/ \___/ + /_/ /_/ /_/\__/ \___//_/ \__,_/ \___/ \__/ /_/ _____/ \___/% }% ?immediate?write128{% @@ -242,138 +242,122 @@ \catcode13\active\catcode32\active% \gdef\xintstart{\edef {\string }\xs_setcats\def {""J}\message{\xs_logo - Welcome to xintexpr interactive mode! + Welcome to xintexpr interactive mode! - input is `;'-terminated and can extend over multiple lines, - definitions must be done using the `:=' syntax, not `='. + - any line starting with a control sequence is executed in the + background, the interrupted numerical input resumes at prompt. - Any line starting with a control sequence is executed in the - background, the interrupted numerical input resumes at prompt. - Magic words: `&pause' (or `;'), `&help', `&bye'. - Mode toggles: `&exact', `&fp', `&int', `&pol'. Say for example - `&fp=24' at the prompt to work with Digits=24 (Digits range: 1 to 62) + Magic words: `&pause' (or `;'), `&help', `&bye', + `&exact', `&fp', `&int', `&pol'. + Say e.g. `&fp=24' to activate floating point mode with Digits=24. Starting in}\xs_magic@&exa\let =\xs_fetch}\gdef\xintresume{\edef {\string }\xs_storecats\xs_setcats% \message{Welcome back to xintexpr interactive mode!}\let =\xs_fetch}\catcode`?0\catcode`\\12?gdef?xs_help?xs_fetch_a{?def {""J}?edef {?string }?message{% - - Terminate inputs using the `;' character. - - - Input can extend over multiple lines (<RET> terminated). + - Terminate inputs using the `;' character. Input can extend over + multiple lines (<RET> terminated). - An empty input (`;' terminated) or the magic word `&pause' puts the session on hold and switches to normal TeX interaction. Use \xintresume to resume the session. + - Lines starting with any control sequence are handed over to + TeX, and numerical input resumes on next line. + - The numerical engine can work in various modes: - * exact mode means using \xintexpr context, - * fp mode uses \xintfloatexpr, - * int mode uses integer-only \xintiiexpr, - * pol mode makes function definitions using \poldef. + exact (uses \xintexpr), fp (uses \xintfloatexpr), int (uses + (\xintiiexpr), and pol (makes definitions using \poldef). To activate a mode enter `&<mode name>' at the prompt - - Lines starting with any control sequence are handed over to - TeX, and numerical input resumes on next line. + - Issue `&mode' if you forgot in what mode you are currently in. - - Say `&fp=<number>' for example `&fp=32' at the prompt to change - the Digits setting. This can be done in the midst of the - input of a multi-line computation! + - Say `&exact' resp. `&fp' to go back and forth between exact + and floating point mode -(1/5) HIT <RET> KEY +(1/5) HIT <RET> KEY% }?let =?xs_help_b}?gdef?xs_help_b{?def {""J}?message{% - - Say `&exact' resp. `&fp' to go back and forth between exact - and floating point mode + - Say `&fp=<number>' for example `&fp=32' at the prompt to activate + fp mode at a given Digits setting. This can be done in the midst + of the input of a multi-line computation! - - Issue `&mode' if you forgot in what mode you are currently in. + - Math functions are supported up to Digits=62 (since xint 1.4e); + sqrt() and powers with integer exponents work in fp mode with Digits + arbitrary. - Definitions (variables or functions) are done using `:='. - IMPORTANT: currently, using a `=' by oversight will cause - breakage because xintsession thinks it is then a numerical - evaluation, not a definition, but there is no `=' operator in - xintexpr syntax. - - Perhaps in future it will be allowed to make definitions using - `=' and xintsession will check if it is not misinterpreting a - `=' from `<=', `>=', `!=', `==' or `seq()' syntax but this - currently was considered to add too much overhead for the - benefit. - - - Parentheses present before the `:=' trigger a function - definition, else a variable definition is done. + * Parentheses present before the `:=' trigger a function + definition, else a variable definition is done. - - Functions defined in one mode are not available for usage in - other modes without further steps; check xintexpr doc. + * IMPORTANT: using a `=' by oversight will cause breakage as + xintsession thinks it is then handling a numerical evaluation, + not a definition, but there is no `=' operator in xintexpr syntax. -(2/5) HIT <RET> KEY +% Perhaps in future it will be allowed to make definitions using `=' +% and xintsession will check if it is not misinterpreting a `=' from +% `<=', `>=', `!=', `==' or `seq()' syntax but this currently was +% considered to add too much overhead for the benefit. +% +(2/5) HIT <RET> KEY% }?let =?xs_help_c}?gdef?xs_help_c{?def {""J}?message{% - - Polynomial definitions (pol mode) are function definitions (see - polexpr documentation). To use a polynomial also as a numerical - function when back in fp mode, issue - \PolGenFloatVariant{<polname>} at the prompt. + - Functions defined in one mode are not available for usage in + other modes without further steps; check xintexpr doc. - - Variables defined in any mode can be used in any mode except: - * polynomials can be used as variables only in the pol and the - exact modes, - * integer-only mode requires... integer-only variables, also - internally. Use in int mode num() or \xintiexpr...\relax as - wrapper around exact or fp variables, even integer-valued ones. + - Polynomials in pol mode are defined using polname(x):=expression; + (or with another letter). They can serve as functions in the exact + mode. To use a polynomial also as an fp mode function, issue + \PolGenFloatVariant{<polname>} at the prompt. - Whenever a variable is defined, or a computation is performed, - the result is assigned a label @_<integer>. These automatic - variables can then be used in subsequent computations. + the result is assigned a label @_<integer>. These labels are + variables which can then be used in subsequent computations. + + - The special variables @_, @__, and @___ hold the last, next + to last and next to next to last evaluation results. - In the case of a multi-variable assignment (see xintexpr doc) the automatic variable @_<integer> holds the whole thing, which may be a nutple or an ople, in addition to individual variables. - - The special variables @_, @__, and @___ hold the last, next - to last and next to next to last evaluation results. - -(3/5) HIT <RET> KEY +(3/5) HIT <RET> KEY% }?let =?xs_help_d}?gdef?xs_help_d{?def {""J}?message{% + - Variables defined in any mode can be used in any mode except: + * polynomials can be used as variables only in the pol and the + exact modes, + * integer-only mode requires... integer-only variables, also + internally. Use num() or \xintiexpr...\relax as wrappers in int + mode around exact or fp variables (even integer-valued ones). + Known issues: - The [P] optional argument of \xintfloateval can not be used because it is not recognized by \xintdeffloatvar, one can use the float() function with its second argument. - - An \xintexpr...\relax wrapper inside fp mode or an - \xintiexpr...\relax one inside int mode can not start a line, - as it would trigger control sequence execution. - Start with 0+ or use parentheses. - - - The definitive default output format of the exact and fp modes - are not yet decided at upstream xintexpr: - - trailing zeros are not trimmed, - - exact and fp modes print out floating point numbers in - diverging ways, - - exact mode does not reduce to lowest terms, use reduce(). + - An \xintexpr...\relax wrapper can not start a line, as it would + trigger control sequence execution. Use parentheses or 0+\... - - By default, the ** and ^ operators operate _only_ with integer - exponents in exact mode and with half-integers in fp mode. - Fractional powers are available via the pow(x,a) function. + - Exact mode does not reduce to lowest terms, use reduce(). -(4/5) HIT <RET> KEY +(4/5) HIT <RET> KEY% }?let =?xs_help_e}?gdef?xs_help_e{?def {""J}?message{% - Known issues (cont.): - - - Refer to xintexpr \poormanloghack documentation on how to let - fractional powers be available with ** or ^, and check polexpr - documentation for related information. - + (cont.) - A session transcript file is created which can be executed by eTeX to redo all calculations; however @_, @__, and @___ will not be defined in this context so need to be manually replaced - by the suitable @_<integer>. + by the suitable @_<integer>. The format of the transcript + is to be considered unstable at this stage. Future: @@ -387,7 +371,7 @@ case, try escaping using `S'. It does work sometimes. (5/5) You are back to the xintexpr interactive session! (mode: ?xs_mode) - Use `&bye' to terminate the session and the TeX run. + Use `&bye' to terminate the session and the TeX run.% }?let =?xs_fetch?xs_fetch_a}?endgroup \let\xs_magic@&hel\xs_help |