PI(1) BSD General Commands Manual PI(1)NAMEpi — Pascal interpreter code translator
SYNOPSISpi [-blnpstuwz] [-i name ...] name.p
DESCRIPTION
Pi translates the program in the file name.p leaving interpreter code in
the file obj in the current directory. The interpreter code can be exe‐
cuted using px. Pix performs the functions of pi and px for `load and
go' Pascal.
The following flags are interpreted by pi; the associated options can
also be controlled in comments within the program as described in the
Berkeley Pascal User's Manual.
-b Block buffer the file output.
-i Enable the listing for any specified procedures and functions and
while processing any specified include files.
-l Make a program listing during translation.
-n Begin each listed include file on a new page with a banner line.
-p Suppress the post-mortem control flow backtrace if an error
occurs; suppress statement limit counting.
-s Accept standard Pascal only; non-standard constructs cause warn‐
ing diagnostics.
-t Suppress runtime tests of subrange variables and treat assert
statements as comments.
-u Card image mode; only the first 72 characters of input lines are
used.
-w Suppress warning diagnostics.
-z Allow execution profiling with pxp by generating statement coun‐
ters, and arranging for the creation of the profile data file
pmon.out when the resulting object is executed.
FILES
file.p Input file.
file.i Include file(s).
/usr/lib/pi2.*strings Text of the error messages.
/usr/lib/how_pi* Basic usage explanation.
obj Interpreter code output.
SEE ALSOpix(1), px(1), pxp(1), pxref(1)
Berkeley Pascal User's Manual.
DIAGNOSTICS
For a basic explanation do
pi
In the diagnostic output of the translator, lines containing syntax
errors are listed with a flag indicating the point of error. Diagnostic
messages indicate the action which the recovery mechanism took in order
to be able to continue parsing. Some diagnostics indicate only that the
input is `malformed.' This occurs if the recovery can find no simple
correction to make the input syntactically valid.
Semantic error diagnostics indicate a line in the source text near the
point of error. Some errors evoke more than one diagnostic to help pin‐
point the error; the follow-up messages begin with an ellipsis `...'.
The first character of each error message indicates its class:
E Fatal error; no code will be generated.
e Non-fatal error.
w Warning - a potential problem.
s Non-standard Pascal construct warning.
If a severe error occurs which inhibits further processing, the transla‐
tor will give a diagnostic and then ‘QUIT’.
BUGS
The keyword packed is recognized but has no effect.
For clarity, semantic errors should be flagged at an appropriate place in
the source text, and multiple instances of the `same' semantic error
should be summarized at the end of a procedure or function rather than
evoking many diagnostics.
When include files are present, diagnostics relating to the last proce‐
dure in one file may appear after the beginning of the listing of the
next.
HISTORY
The Pi command appeared in 3.0BSD.
4th Berkeley Distribution June 6, 1993 4th Berkeley Distribution
