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-rw-r--r--support/splint/cweb/lo.w100
1 files changed, 43 insertions, 57 deletions
diff --git a/support/splint/cweb/lo.w b/support/splint/cweb/lo.w
index 68ef1b6595..c2461787a9 100644
--- a/support/splint/cweb/lo.w
+++ b/support/splint/cweb/lo.w
@@ -1,4 +1,4 @@
-@q Copyright 2012-2020 Alexander Shibakov@>
+@q Copyright 2012-2024 Alexander Shibakov@>
@q Copyright 2002-2014 Free Software Foundation, Inc.@>
@q This file is part of SPLinT@>
@@ -18,6 +18,7 @@
@**The scanner for \ifx\bison\UNDEFINED\.{bison}\else\bison\fi\ syntax.
\ifx\bison\UNDEFINED
\input limbo.sty
+ \input yystype.sty
\input grabstates.sty
\immediate\openout\stlist=lo_states.h
\fi
@@ -95,7 +96,7 @@ output it in the form of a header file for the `real' lexer output
@ {\it A \Cee-like comment in directives/rules}.
@<Grammar lexer states@>=
-@G
+@G(fs1)
%x SC_YACC_COMMENT
@g
@@ -106,22 +107,26 @@ output it in the form of a header file for the `real' lexer output
%\tracerulestrue
%\traceactionstrue
%\tracebadcharstrue
+%\traceparseresultstrue
+%\traceparserstatestrue
%\prodstyle{\%\%}%
-\traceparserstatesfalse
-\tracestacksfalse
-\tracerulesfalse
-\traceactionsfalse
-\tracebadcharsfalse
-\yyflexdebugfalse
@<Grammar lexer states@>=
-@G
+@G(fs1)
%x SC_ESCAPED_STRING SC_ESCAPED_CHARACTER
@g
@ {\it A identifier was just read in directives/rules. Special state
to capture the sequence `\.{identifier:}'}.
+\traceparserstatesfalse
+\tracestacksfalse
+\tracerulesfalse
+\traceactionsfalse
+\tracebadcharsfalse
+\yyflexdebugfalse
+\traceparseresultsfalse
+\traceparserstatesfalse
@<Grammar lexer states@>=
-@G
+@G(fs1)
%x SC_AFTER_IDENTIFIER
@g
@@ -131,7 +136,7 @@ disallow \prodstyle{NUL}, as this simplifies our implementation. We match
angle brackets in nested pairs: several languages use them for
generics/template types}.
@<Grammar lexer states@>=
-@G
+@G(fs1)
%x SC_TAG
@g
@@ -150,25 +155,25 @@ Four types of user code:
\aterm predicate (code between \.{\%?\{} and \.{\}} in middle section);
}%
@<Grammar lexer states@>=
-@G
+@G(fs1)
%x SC_PROLOGUE SC_BRACED_CODE SC_EPILOGUE SC_PREDICATE
@g
@ {\it \Cee\ and \Ceepp\ comments in code}.
@<Grammar lexer states@>=
-@G
+@G(fs1)
%x SC_COMMENT SC_LINE_COMMENT
@g
@ {\it Strings and characters in code}.
@<Grammar lexer states@>=
-@G
+@G(fs1)
%x SC_STRING SC_CHARACTER
@g
@ Bracketed identifiers support.
@<Grammar lexer states@>=
-@G
+@G(fs1)
%x SC_BRACKETED_ID SC_RETURN_BRACKETED_ID
@g
@@ -179,9 +184,9 @@ Four types of user code:
@ The code for the generated scanner is highly dependent on the options
supplied. Most of the options below are essential for the scheme
-adopted in this package to work.
+adopted in this package to work.\gtextidx{\flex\ options example}{flex options example}{\flexidxdomain}%
@<Grammar lexer options@>=
-@G
+@G(fs1)
%option bison-bridge
%option noyywrap nounput noinput reentrant
%option noyy_top_state
@@ -194,7 +199,6 @@ adopted in this package to work.
Here is a full list of regular expressions recognized by the \bison\ scanner.
@<Grammar token regular expressions@>=
@<Scan grammar white space@>@;
- @<Scan \flex\ directives and options@>@;
@<Scan \bison\ directives@>@;
@<Do not support zero characters@>@;
@<Scan after an identifier, check whether a colon is next@>@;
@@ -340,23 +344,11 @@ returns a pair of pointers as the value.
}
@g
-@ Some additional constructs needed to typeset simple \flex\
-declarations. This is not part of the original \bison\ scanner.
-@<Scan \flex\ directives and options@>=
-@G(fs2)
-<INITIAL>
-{
- "%option" {@> @[TeX_( "/yylexreturnptr{FLEX_OPTION}" );@]@=}
- "%x" {@> @[TeX_( "/yylexreturnptr{FLEX_STATE_X}" );@]@=}
- "%s" {@> @[TeX_( "/yylexreturnptr{FLEX_STATE_S}" );@]@=}
-}
-@g
-
@ We present the `bad character' code first, before going into the details
of the character matching by the rest of the lexer.
@<Process a bad character@>=
- @[TeX_( "/edef/next{/nx/csname lexspecial[/the/yytextpure]/nx/endcsname}" );@]@;
- @[TeX_( "/expandafter/expandafter/expandafter/ifx/next/relax" );@]@;
+ @[TeX_( "/expandafter/let/expandafter/next/csname lexspecial[/the/yytextpure]/endcsname" );@]@;
+ @[TeX_( "/ifx/next/relax" );@]@;
@[TeX_( " /iftracebadchars" );@]@;
@[TeX_( " /yyfatal{invalid character(s): /the/yytext}" );@]@;
@[TeX_( " /fi" );@]@;
@@ -436,13 +428,12 @@ later, after the context is known.
@ @<Process the bracketed part of an identifier@>=
@[TeX_( "/ifx/bracketedidstr/empty" );@]@;
@[TeX_( " /bracketedidcontextstate/YYSTART /yyBEGIN{SC_BRACKETED_ID}" );@]@;
- @[TeX_( " /let/next=/yylexnext" );@]@;
+ @[TeX_( " /yybreak/yylexnext" );@]@;
@[TeX_( "/else" );@]@;
@[TeX_( " /ROLLBACKCURRENTTOKEN" );@]@;
@[TeX_( " /yyBEGIN{SC_RETURN_BRACKETED_ID}" );@]@;
- @[TeX_( " /def/next{/yylexreturn{ID}}" );@]@;
- @[TeX_( "/fi" );@]@;
- @[TeX_( "/next" );@]@;
+ @[TeX_( " /yybreak{/yylexreturn{ID}}" );@]@;
+ @[TeX_( "/yycontinue" );@]@;
@ @<Process a colon after an identifier@>=
@[TeX_( "/ifx/bracketedidstr/empty" );@]@;
@@ -485,27 +476,25 @@ later, after the context is known.
@[TeX_( "/ifx/bracketedidstr/empty" );@]@;
@[TeX_( " /edef/bracketedidstr{{/the/yytextpure}{/the/yytext}" );@]@;
@[TeX_( " {/the/yyfmark}{/the/yysmark}}" );@]@;
- @[TeX_( " /let/next=/yylexnext" );@]@;
+ @[TeX_( " /yybreak/yylexnext" );@]@;
@[TeX_( "/else" );@]@;
- @[TeX_( " /def/next{/yywarn{unexpected identifier " );@]@;
+ @[TeX_( " /yybreak{/yywarn{unexpected identifier " );@]@;
@[TeX_( " in bracketed name: /the/yytext}}" );@]@;
- @[TeX_( "/fi" );@]@;
- @[TeX_( "/next" );@]@;
+ @[TeX_( "/yycontinue" );@]@;
@ @<Finish processing bracketed identifier@>=
@[TeX_( "/yyBEGINr/bracketedidcontextstate" );@]@;
@[TeX_( "/ifx/bracketedidstr/empty" );@]@;
- @[TeX_( " /def/next{/yywarn{an identifier expected}}" );@]@;
+ @[TeX_( " /yybreak{/yywarn{an identifier expected}}" );@]@;
@[TeX_( "/else" );@]@;
@[TeX_( " /ifnum/bracketedidcontextstate=/yylexstate{INITIAL}/relax" );@]@;
@[TeX_( " /expandafter/yylval/expandafter{/bracketedidstr}" );@]@;
@[TeX_( " /let/bracketedidstr=/empty" );@]@;
- @[TeX_( " /def/next{/yylexreturn{BRACKETED_ID}}" );@]@;
+ @[TeX_( " /yybreak@@{/yylexreturn{BRACKETED_ID}}" );@]@;
@[TeX_( " /else" );@]@;
- @[TeX_( " /let/next=/yylexnext" );@]@;
+ @[TeX_( " /yybreak@@/yylexnext" );@]@;
@[TeX_( " /fi" );@]@;
- @[TeX_( "/fi" );@]@;
- @[TeX_( "/next" );@]@;
+ @[TeX_( "/yycontinue" );@]@;
@ @<Complain about improper identifier characters@>=
@[TeX_( "/yyfatal{invalid character(s) in bracketed name: /the/yytext}" );@]@;
@@ -621,11 +610,10 @@ The initial quote is already eaten}.
@[TeX_( " {/the/yyfmark}{/the/yysmark}}}/next" );@]@;
@[TeX_( " /STRINGFREE" );@]@;
@[TeX_( " /yyBEGIN{INITIAL}" );@]@;
- @[TeX_( " /def/next{/yylexreturn{TAG}}" );@]@;
+ @[TeX_( " /yybreak{/yylexreturn{TAG}}" );@]@;
@[TeX_( "/else" );@]@;
- @[TeX_( " /STRINGGROW/let/next=/yylexnext" );@]@;
- @[TeX_( "/fi" );@]@;
- @[TeX_( "/next" );@]@;
+ @[TeX_( " /STRINGGROW/yybreak/yylexnext" );@]@;
+ @[TeX_( "/yycontinue" );@]@;
@ This is a slightly different rule from the original scanner. We do not perform |yyleng| computations,
so it makes sense to raise the nesting level one by one.
@@ -722,13 +710,12 @@ braced code.
@[TeX_( "/ifnum/lonesting</z@@" );@]@;
@[TeX_( " /STRINGFINISH" );@]@;
@[TeX_( " /edef/next{/yylval{{/the/laststring}{/the/yyfmark}{/the/yysmark}}}/next" );@]@;
- @[TeX_( " /def/next{/yylexreturn{BRACED_CODE}}" );@]@;
@[TeX_( " /yyBEGIN{INITIAL}" );@]@;
+ @[TeX_( " /yybreak{/yylexreturn{BRACED_CODE}}" );@]@;
@[TeX_( "/else" );@]@;
@[TeX_( " /STRINGGROW" );@]@;
- @[TeX_( " /let/next=/yylexnext" );@]@;
- @[TeX_( "/fi" );@]@;
- @[TeX_( "/next" );@]@;
+ @[TeX_( " /yybreak/yylexnext" );@]@;
+ @[TeX_( "/yycontinue" );@]@;
@ @<Add closing brace to a predicate@>=
@[TeX_( "/advance/lonesting/m@@ne" );@]@;
@@ -736,12 +723,11 @@ braced code.
@[TeX_( " /STRINGFINISH" );@]@;
@[TeX_( " /edef/next{/yylval{{/the/laststring}{/the/yyfmark}{/the/yysmark}}}/next" );@]@;
@[TeX_( " /yyBEGIN{INITIAL}" );@]@;
- @[TeX_( " /def/next{/yylexreturn{BRACED_PREDICATE}}" );@]@;
+ @[TeX_( " /yybreak{/yylexreturn{BRACED_PREDICATE}}" );@]@;
@[TeX_( "/else" );@]@;
@[TeX_( " /STRINGGROW" );@]@;
- @[TeX_( " /let/next=/yylexnext" );@]@;
- @[TeX_( "/fi" );@]@;
- @[TeX_( "/next" );@]@;
+ @[TeX_( " /yybreak/yylexnext" );@]@;
+ @[TeX_( "/yycontinue" );@]@;
@ {\it Scanning some prologue: from \.{\%\{} (already scanned) to \.{\%\}}}.
@<Scan prologue@>=
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-01 10:35:33 +0000