ack/lang/pc/comp/em_pc.6

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Tune the installed manual pages. This commit slightly improves the formatting of the manuals. My OpenBSD machine uses mandoc(1) to format manuals. I check the manuals with `mandoc -T lint` and fix most of the warnings. I also make other changes where mandoc didn't warn me. roff(7) says, "Each sentence should terminate at the end of an input line," but we often forgot this rule. I insert some newlines after sentences that had ended mid-line. roff(7) also says that blank lines "are only permitted within literal contexts." I delete blank lines. This removes some extra blank lines from mandoc's output. If I do want a blank line in the output, I call ".sp 1" to make it in man(7). If I want a blank line in the source, but not the output, I put a plain dot "." so roff ignores it. Hyphens used for command-line options, like \-a, should be escaped by a backslash. I insert a few missing backslashes. mandoc warns if the date in .TH doesn't look like a date. Our manuals had a missing date or the RCS keyword "$Revision$". Git doesn't expand RCS keywords. I put in today's date, 2017-01-18. Some manuals used tab characters in filled mode. That doesn't work. I use .nf to turn off filled mode, or I use .IP in man(7) to make the indentation without a tab character. ack(1) defined a macro .SB but never used it, so I delete the definition. I also remove a call to the missing macro .RF. mandoc warns about empty paragraphs. I deleted them. mandoc also warned about these macro pairs in anm(1): .SM .B text The .SM did nothing because the .B text is on a different line. I changed each pair to .SB for small bold text. I make a few other small changes.
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.TH EM_PC 6 2017-01-18
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.ad
.SH NAME
em_pc \- Pascal compiler
.SH SYNOPSIS
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.B ~em/lib.bin/em_pc
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.RI [ option ]
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.I source
.I destination
.SH DESCRIPTION
.I Em_pc
is a compiler that translates Pascal programs into EM code.
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Normally the compiler is called by means of the user interface program
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\fIack\fR(1).
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.PP
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The input is taken from
.IR source ,
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while the EM code is written on
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.IR destination .
.br
.I Option
is a, possibly empty, sequence of the following combinations:
.IP \fB\-M\fP\fIn\fP
set maximum identifier length to \fIn\fP.
The minimum value for \fIn\fR is 9, because the keyword
"PROCEDURE" is that long.
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.IR n
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.IP \fB\-n\fR
do not generate EM register messages.
The user-declared variables will not be stored into registers on the target
machine.
.IP \fB\-L\fR
do not generate the EM \fBfil\fR and \fBlin\fR instructions that enable
an interpreter to keep track of the current location in the source code.
.IP \fB\-V\fIcm\fR.\fIn\fR,\ \fB\-V\fIcm\fR.\fIncm\fR.\fIn\fR\ ...
.br
set the size and alignment requirements.
The letter \fIc\fR indicates the simple type, which is one of
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\fBw\fR(word size), \fBi\fR(INTEGER), \fBl\fR(LONG), \fBr\fR(REAL),
\fBp\fR(POINTER).
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It may also be the letter \fBS\fR, indicating that an initial
record alignment follows.
The \fIm\fR parameter can be used to specify the length of the type (in bytes)
and the \fIn\fR parameter for the alignment of that type.
Absence of \fIm\fR or \fIn\fR causes a default value to be retained.
.IP \fB\-w\fR
suppress warning messages.
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.IP \fB\-R\fR
Tune the installed manual pages. This commit slightly improves the formatting of the manuals. My OpenBSD machine uses mandoc(1) to format manuals. I check the manuals with `mandoc -T lint` and fix most of the warnings. I also make other changes where mandoc didn't warn me. roff(7) says, "Each sentence should terminate at the end of an input line," but we often forgot this rule. I insert some newlines after sentences that had ended mid-line. roff(7) also says that blank lines "are only permitted within literal contexts." I delete blank lines. This removes some extra blank lines from mandoc's output. If I do want a blank line in the output, I call ".sp 1" to make it in man(7). If I want a blank line in the source, but not the output, I put a plain dot "." so roff ignores it. Hyphens used for command-line options, like \-a, should be escaped by a backslash. I insert a few missing backslashes. mandoc warns if the date in .TH doesn't look like a date. Our manuals had a missing date or the RCS keyword "$Revision$". Git doesn't expand RCS keywords. I put in today's date, 2017-01-18. Some manuals used tab characters in filled mode. That doesn't work. I use .nf to turn off filled mode, or I use .IP in man(7) to make the indentation without a tab character. ack(1) defined a macro .SB but never used it, so I delete the definition. I also remove a call to the missing macro .RF. mandoc warns about empty paragraphs. I deleted them. mandoc also warned about these macro pairs in anm(1): .SM .B text The .SM did nothing because the .B text is on a different line. I changed each pair to .SB for small bold text. I make a few other small changes.
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disable range checks.
Additionally, the run-time tests to see if
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a function is assigned, are skipped.
.IP \fB\-A\fR
enable extra array bound checks, for machines that do not implement the
EM ones.
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.IP \fB\-C\fR
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the lower case and upper case letters are treated differently.
.IP "\fB\-u\fR, \fB\-U\fR"
Tune the installed manual pages. This commit slightly improves the formatting of the manuals. My OpenBSD machine uses mandoc(1) to format manuals. I check the manuals with `mandoc -T lint` and fix most of the warnings. I also make other changes where mandoc didn't warn me. roff(7) says, "Each sentence should terminate at the end of an input line," but we often forgot this rule. I insert some newlines after sentences that had ended mid-line. roff(7) also says that blank lines "are only permitted within literal contexts." I delete blank lines. This removes some extra blank lines from mandoc's output. If I do want a blank line in the output, I call ".sp 1" to make it in man(7). If I want a blank line in the source, but not the output, I put a plain dot "." so roff ignores it. Hyphens used for command-line options, like \-a, should be escaped by a backslash. I insert a few missing backslashes. mandoc warns if the date in .TH doesn't look like a date. Our manuals had a missing date or the RCS keyword "$Revision$". Git doesn't expand RCS keywords. I put in today's date, 2017-01-18. Some manuals used tab characters in filled mode. That doesn't work. I use .nf to turn off filled mode, or I use .IP in man(7) to make the indentation without a tab character. ack(1) defined a macro .SB but never used it, so I delete the definition. I also remove a call to the missing macro .RF. mandoc warns about empty paragraphs. I deleted them. mandoc also warned about these macro pairs in anm(1): .SM .B text The .SM did nothing because the .B text is on a different line. I changed each pair to .SB for small bold text. I make a few other small changes.
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allow underscores in identifiers.
It is not allowed to start an identifier
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with an underscore.
.IP \fB\-a\fR
don't generate code for assertions.
.IP \fB\-c\fR
Tune the installed manual pages. This commit slightly improves the formatting of the manuals. My OpenBSD machine uses mandoc(1) to format manuals. I check the manuals with `mandoc -T lint` and fix most of the warnings. I also make other changes where mandoc didn't warn me. roff(7) says, "Each sentence should terminate at the end of an input line," but we often forgot this rule. I insert some newlines after sentences that had ended mid-line. roff(7) also says that blank lines "are only permitted within literal contexts." I delete blank lines. This removes some extra blank lines from mandoc's output. If I do want a blank line in the output, I call ".sp 1" to make it in man(7). If I want a blank line in the source, but not the output, I put a plain dot "." so roff ignores it. Hyphens used for command-line options, like \-a, should be escaped by a backslash. I insert a few missing backslashes. mandoc warns if the date in .TH doesn't look like a date. Our manuals had a missing date or the RCS keyword "$Revision$". Git doesn't expand RCS keywords. I put in today's date, 2017-01-18. Some manuals used tab characters in filled mode. That doesn't work. I use .nf to turn off filled mode, or I use .IP in man(7) to make the indentation without a tab character. ack(1) defined a macro .SB but never used it, so I delete the definition. I also remove a call to the missing macro .RF. mandoc warns about empty paragraphs. I deleted them. mandoc also warned about these macro pairs in anm(1): .SM .B text The .SM did nothing because the .B text is on a different line. I changed each pair to .SB for small bold text. I make a few other small changes.
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allow C-like strings.
This option is mainly intended for usage with C-functions.
This option will cause the type 'string' to be known.
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.IP \fB\-d\fR
allow the type 'long'.
.IP \fB\-i\fR\fIn\fR
set the size of integer sets to \fIn\fR. When not used, a default value is
retained.
.IP \fB\-s\fR
Tune the installed manual pages. This commit slightly improves the formatting of the manuals. My OpenBSD machine uses mandoc(1) to format manuals. I check the manuals with `mandoc -T lint` and fix most of the warnings. I also make other changes where mandoc didn't warn me. roff(7) says, "Each sentence should terminate at the end of an input line," but we often forgot this rule. I insert some newlines after sentences that had ended mid-line. roff(7) also says that blank lines "are only permitted within literal contexts." I delete blank lines. This removes some extra blank lines from mandoc's output. If I do want a blank line in the output, I call ".sp 1" to make it in man(7). If I want a blank line in the source, but not the output, I put a plain dot "." so roff ignores it. Hyphens used for command-line options, like \-a, should be escaped by a backslash. I insert a few missing backslashes. mandoc warns if the date in .TH doesn't look like a date. Our manuals had a missing date or the RCS keyword "$Revision$". Git doesn't expand RCS keywords. I put in today's date, 2017-01-18. Some manuals used tab characters in filled mode. That doesn't work. I use .nf to turn off filled mode, or I use .IP in man(7) to make the indentation without a tab character. ack(1) defined a macro .SB but never used it, so I delete the definition. I also remove a call to the missing macro .RF. mandoc warns about empty paragraphs. I deleted them. mandoc also warned about these macro pairs in anm(1): .SM .B text The .SM did nothing because the .B text is on a different line. I changed each pair to .SB for small bold text. I make a few other small changes.
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allow only standard Pascal.
This disables the \fB\-c\fR, \fB\-d\fR, \fB\-u\fR,
\fB\-U\fR and \fB\-C\fR options.
Furthermore, assertions are not recognized at all (instead of just
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being skipped).
.IP \fB\-t\fR
trace calls and exits of procedures and functions.
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.SH FILES
.IR ~em/lib/em_pc :
binary of the Pascal compiler.
.SH DIAGNOSTICS
All warning and error messages are written on standard error output.