texlive[59120] Master/texmf-dist: xintsession (7may21)
commits+karl at tug.org
commits+karl at tug.org
Fri May 7 22:18:01 CEST 2021
Revision: 59120
http://tug.org/svn/texlive?view=revision&revision=59120
Author: karl
Date: 2021-05-07 22:18:01 +0200 (Fri, 07 May 2021)
Log Message:
-----------
xintsession (7may21)
Modified Paths:
--------------
trunk/Master/texmf-dist/doc/plain/xintsession/README.md
trunk/Master/texmf-dist/tex/plain/xintsession/xintsession.tex
Modified: trunk/Master/texmf-dist/doc/plain/xintsession/README.md
===================================================================
--- trunk/Master/texmf-dist/doc/plain/xintsession/README.md 2021-05-07 20:17:06 UTC (rev 59119)
+++ trunk/Master/texmf-dist/doc/plain/xintsession/README.md 2021-05-07 20:18:01 UTC (rev 59120)
@@ -1,6 +1,6 @@
# xintsession README #
-Release: 0.2 (2021-05-05)
+Release: 0.2a (2021-05-06)
## Usage ##
Modified: trunk/Master/texmf-dist/tex/plain/xintsession/xintsession.tex
===================================================================
--- trunk/Master/texmf-dist/tex/plain/xintsession/xintsession.tex 2021-05-07 20:17:06 UTC (rev 59119)
+++ trunk/Master/texmf-dist/tex/plain/xintsession/xintsession.tex 2021-05-07 20:18:01 UTC (rev 59120)
@@ -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{%
@@ -242,102 +242,101 @@
\catcode13\active\catcode32\active%
\gdef\xintstart{\edef {\string }\xs_setcats\def
{""J}\message{\xs_logo
+
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.
+ - Terminate inputs using the `;' character. Input can extend over
+ multiple lines (<RET> terminated).
- - 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.
+ * Parentheses present before the `:=' trigger a function
+ definition, else a variable definition is done.
- 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.
+ * 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.
+% 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{%
- Functions defined in one mode are not available for usage in
other modes without further steps; check xintexpr doc.
-(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
+ - 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.
- - 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.
-
- 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
@@ -344,36 +343,21 @@
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.
+ - An \xintexpr...\relax wrapper can not start a line, as it would
+ trigger control sequence execution. Use parentheses or 0+\...
- - 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().
+ - Exact mode does not reduce to lowest terms, use reduce().
- - 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.
-
-(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
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