diff options
Diffstat (limited to 'share/doc')
| -rw-r--r-- | share/doc/psd/16.lex/Makefile | 19 | ||||
| -rw-r--r-- | share/doc/psd/16.lex/lex.ms | 98 |
2 files changed, 82 insertions, 35 deletions
diff --git a/share/doc/psd/16.lex/Makefile b/share/doc/psd/16.lex/Makefile index db04f12..6f18b52 100644 --- a/share/doc/psd/16.lex/Makefile +++ b/share/doc/psd/16.lex/Makefile @@ -3,9 +3,24 @@ DIR= psd/16.lex SRCS= lex.ms -MACROS= -msU +MACROS= -ms +GROFF= groff + +all: paper.ps paper.ascii paper.ps: ${SRCS} - ${TBL} ${SRCS} | ${ROFF} > ${.TARGET} + ${TBL} ${SRCS} | ${GROFF} ${MACROS} - > ${.TARGET} + +paper.ascii: ${SRCS} + ${TBL} ${SRCS} | ${ROFF} ${MACROS} - > ${.TARGET} + +paper.ascii.gz: paper.ascii +paper.ps.gz: paper.ps + +paper.ascii.gz paper.ps.gz: + gzip -f ${.TARGET:.gz=} + +clean: + rm -f paper.* *.spell errs Errs make.out Make.log *~ .include <bsd.doc.mk> diff --git a/share/doc/psd/16.lex/lex.ms b/share/doc/psd/16.lex/lex.ms index f4e35c4..36aa783 100644 --- a/share/doc/psd/16.lex/lex.ms +++ b/share/doc/psd/16.lex/lex.ms @@ -1,10 +1,45 @@ -.\" This module is believed to contain source code proprietary to AT&T. -.\" Use and redistribution is subject to the Berkeley Software License -.\" Agreement and your Software Agreement with AT&T (Western Electric). -.\" +.\" Copyright (C) Caldera International Inc. 2001-2002. All rights reserved. +.\" +.\" Redistribution and use in source and binary forms, with or without +.\" modification, are permitted provided that the following conditions are +.\" met: +.\" +.\" Redistributions of source code and documentation must retain the above +.\" copyright notice, this list of conditions and the following +.\" disclaimer. +.\" +.\" Redistributions in binary form must reproduce the above copyright +.\" notice, this list of conditions and the following disclaimer in the +.\" documentation and/or other materials provided with the distribution. +.\" +.\" All advertising materials mentioning features or use of this software +.\" must display the following acknowledgement: +.\" +.\" This product includes software developed or owned by Caldera +.\" International, Inc. Neither the name of Caldera International, Inc. +.\" nor the names of other contributors may be used to endorse or promote +.\" products derived from this software without specific prior written +.\" permission. +.\" +.\" USE OF THE SOFTWARE PROVIDED FOR UNDER THIS LICENSE BY CALDERA +.\" INTERNATIONAL, INC. AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR +.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED +.\" WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE +.\" DISCLAIMED. IN NO EVENT SHALL CALDERA INTERNATIONAL, INC. BE LIABLE +.\" FOR ANY DIRECT, INDIRECT INCIDENTAL, SPECIAL, EXEMPLARY, OR +.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF +.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR +.\" BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, +.\" WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE +.\" OR OTHERWISE) RISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN +.\" IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +.\" .\" @(#)lex.ms 8.1 (Berkeley) 6/8/93 .\" .\" $FreeBSD$ +.de MH +Bell Laboratories, Murray Hill, NJ 07974. +.. .EH 'PSD:16-%''Lex \- A Lexical Analyzer Generator' .OH 'Lex \- A Lexical Analyzer Generator''PSD:16-%' .hc ~ @@ -12,11 +47,11 @@ .de TS .br .nf -.SP 1v +.sp 1v .ul 0 .. .de TE -.SP 1v +.sp 1v .fi .. .\".de PT @@ -108,9 +143,6 @@ program fragments. As each expression appears in the input to the program written by Lex, the corresponding fragment is executed. .PP -.de MH -Bell Laboratories, Murray Hill, NJ 07974. -.. The user supplies the additional code beyond expression matching needed to complete his tasks, possibly @@ -169,7 +201,7 @@ input in this memo) and perform the specified actions for each expression as it is detected. See Figure 1. -.GS +.\" .GS .TS center; l _ r @@ -191,7 +223,7 @@ Input \(-> yylex \(-> Output An overview of Lex Figure 1 .TE -.GE +.\" .GE .PP For a trivial example, consider a program to delete from the input @@ -257,7 +289,7 @@ Additional programs, written by other generators or by hand, can be added easily to programs written by Lex. -.BS 2 +.\" .BS 2 .ps 9 .vs 11 .TS @@ -290,7 +322,7 @@ Input \(-> yylex \(-> yyparse \(-> Parsed input .TE .ps 10 .vs 12 -.BE +.\" .BE Yacc users will realize that the name .ul @@ -857,11 +889,11 @@ Another easy way to avoid writing actions is the action character for the next rule. The previous example could also have been written .TS -center; +center, tab(#); l l. -" " | -"\et" | -"\en" ; +" "#| +"\et"#| +"\en"#; .TE with the same result, although in different style. The quotes around \en and \et are not required. @@ -1505,15 +1537,15 @@ by the {name} syntax in a rule. Using {D} for the digits and {E} for an exponent field, for example, might abbreviate rules to recognize numbers: .TS -center; +center, tab(#); l l. -D [0\-9] -E [DEde][\-+]?{D}+ +D#[0\-9] +E#[DEde][\-+]?{D}+ %% -{D}+ printf("integer"); -{D}+"."{D}\(**({E})? | -{D}\(**"."{D}+({E})? | -{D}+{E} printf("real"); +{D}+#printf("integer"); +{D}+"."{D}\(**({E})?#| +{D}\(**"."{D}+({E})?#| +{D}+{E}#printf("real"); .TE Note the first two rules for real numbers; both require a decimal point and contain @@ -1833,7 +1865,7 @@ to find the letter .I d or .I D . -The program than adds +The program then adds .c .I \(fme\(fm\-\(fmd\(fm , which converts @@ -1874,11 +1906,11 @@ l l. And one routine must have initial \fId\fR changed to initial \fIr\fR: .TS -center; +center, tab(#); l l. -{d}1{m}{a}{c}{h} {yytext[0] =+ \(fmr\(fm \- \(fmd\(fm; - ECHO; - } +{d}1{m}{a}{c}{h}#{yytext[0] =+ \(fmr\(fm \- \(fmd\(fm; +#ECHO; +#} .TE To avoid such names as \fIdsinx\fR being detected as instances of \fIdsin\fR, some final rules pick up longer words as identifiers @@ -1969,7 +2001,7 @@ magic { { case \(fma\(fm: printf("first"); break; case \(fmb\(fm: printf("second"); break; - case \(fmc\(fm: printf("third"); break; + case \(fmc\(fm: printf("third"); break; default: ECHO; break; } } @@ -2083,7 +2115,7 @@ l. .TE which indicate the value associated with each character. Thus the next example -.GS 2 +.\" .GS 2 .TS center; l l. @@ -2104,7 +2136,7 @@ l l. .sp .ce 1 Sample character table. -.GE +.\" .GE maps the lower and upper case letters together into the integers 1 through 26, newline into 27, + and \- into 28 and 29, and the digits into 30 through 39. @@ -2256,7 +2288,7 @@ and debugged by Eric Schmidt. .2C .NH References. -.SP 1v +.sp 1v .IP 1. B. W. Kernighan and D. M. Ritchie, .I |
