/* --------------------------------------------------------------------------
* Input functions, lexical analysis parsing etc...
*
- * Hugs 98 is Copyright (c) Mark P Jones, Alastair Reid and the Yale
- * Haskell Group 1994-99, and is distributed as Open Source software
- * under the Artistic License; see the file "Artistic" that is included
- * in the distribution for details.
+ * The Hugs 98 system is Copyright (c) Mark P Jones, Alastair Reid, the
+ * Yale Haskell Group, and the Oregon Graduate Institute of Science and
+ * Technology, 1994-1999, All rights reserved. It is distributed as
+ * free software under the license in the file "License", which is
+ * included in the distribution.
*
* $RCSfile: input.c,v $
- * $Revision: 1.7 $
- * $Date: 1999/10/15 11:02:12 $
+ * $Revision: 1.27 $
+ * $Date: 2000/04/06 00:36:12 $
* ------------------------------------------------------------------------*/
-#include "prelude.h"
+#include "hugsbasictypes.h"
#include "storage.h"
-#include "backend.h"
#include "connect.h"
-#include "command.h"
#include "errors.h"
-#include "link.h"
+
#include <ctype.h>
#if HAVE_GETDELIM_H
#include "getdelim.h"
#endif
-#if HUGS_FOR_WINDOWS
+#if IS_WIN32
+#include <windows.h>
+#endif
+
+#if IS_WIN32
#undef IN
#endif
+#if HAVE_LIBREADLINE && HAVE_READLINE_READLINE_H && HAVE_READLINE_HISTORY_H
+#define USE_READLINE 1
+#else
+#define USE_READLINE 0
+#endif
+
+#if USE_READLINE
+#include <readline/readline.h>
+#include <readline/history.h>
+#endif
+
+
/* --------------------------------------------------------------------------
* Global data:
* ------------------------------------------------------------------------*/
-List tyconDefns = NIL; /* type constructor definitions */
-List typeInDefns = NIL; /* type synonym restrictions */
-List valDefns = NIL; /* value definitions in script */
-List classDefns = NIL; /* class defns in script */
-List instDefns = NIL; /* instance defns in script */
-List selDefns = NIL; /* list of selector lists */
-List genDefns = NIL; /* list of generated names */
-List unqualImports = NIL; /* unqualified import list */
-List foreignImports = NIL; /* foreign imports */
-List foreignExports = NIL; /* foreign exportsd */
-List defaultDefns = NIL; /* default definitions (if any) */
-Int defaultLine = 0; /* line in which default defs occur*/
-List evalDefaults = NIL; /* defaults for evaluator */
-
-Cell inputExpr = NIL; /* input expression */
-Bool literateScripts = FALSE; /* TRUE => default to lit scripts */
-Bool literateErrors = TRUE; /* TRUE => report errs in lit scrs */
-Bool offsideON = TRUE; /* TRUE => implement offside rule */
+List tyconDefns = NIL; /* type constructor definitions */
+List typeInDefns = NIL; /* type synonym restrictions */
+List valDefns = NIL; /* value definitions in script */
+List classDefns = NIL; /* class defns in script */
+List instDefns = NIL; /* instance defns in script */
+List selDefns = NIL; /* list of selector lists */
+List genDefns = NIL; /* list of generated names */
+List unqualImports = NIL; /* unqualified import list */
+List foreignImports = NIL; /* foreign imports */
+List foreignExports = NIL; /* foreign exportsd */
+List defaultDefns = NIL; /* default definitions (if any) */
+Int defaultLine = 0; /* line in which default defs occur*/
+List evalDefaults = NIL; /* defaults for evaluator */
+
+Cell inputExpr = NIL; /* input expression */
+Cell inputContext = NIL; /* input context */
+Bool literateScripts = FALSE; /* TRUE => default to lit scripts */
+Bool literateErrors = TRUE; /* TRUE => report errs in lit scrs */
+Bool offsideON = TRUE; /* TRUE => implement offside rule */
+Bool readingInterface = FALSE;
String repeatStr = 0; /* Repeat last expr */
* Local function prototypes:
* ------------------------------------------------------------------------*/
-static Void local initCharTab Args((Void));
-static Void local fileInput Args((String,Long));
-static Bool local literateMode Args((String));
-static Bool local linecmp Args((String,String));
-static Int local nextLine Args((Void));
-static Void local skip Args((Void));
-static Void local thisLineIs Args((Int));
-static Void local newlineSkip Args((Void));
-static Void local closeAnyInput Args((Void));
-
- Int yyparse Args((Void)); /* can't stop yacc making this */
+static Void local initCharTab ( Void );
+static Void local fileInput ( String,Long );
+static Bool local literateMode ( String );
+static Bool local linecmp ( String,String );
+static Int local nextLine ( Void );
+static Void local skip ( Void );
+static Void local thisLineIs ( Int );
+static Void local newlineSkip ( Void );
+static Void local closeAnyInput ( Void );
+
+ Int yyparse ( Void ); /* can't stop yacc making this */
/* public, but don't advertise */
/* it in a header file. */
-static Void local endToken Args((Void));
-static Text local readOperator Args((Void));
-static Text local readIdent Args((Void));
-static Cell local readRadixNumber Args((Int));
-static Cell local readNumber Args((Void));
-static Cell local readChar Args((Void));
-static Cell local readString Args((Void));
-static Void local saveStrChr Args((Char));
-static Cell local readAChar Args((Bool));
+static Void local endToken ( Void );
+static Text local readOperator ( Void );
+static Text local readIdent ( Void );
+static Cell local readRadixNumber ( Int );
+static Cell local readNumber ( Void );
+static Cell local readChar ( Void );
+static Cell local readString ( Void );
+static Void local saveStrChr ( Char );
+static Cell local readAChar ( Bool );
-static Bool local lazyReadMatches Args((String));
-static Cell local readEscapeChar Args((Bool));
-static Void local skipGap Args((Void));
-static Cell local readCtrlChar Args((Void));
-static Cell local readOctChar Args((Void));
-static Cell local readHexChar Args((Void));
-static Int local readHexDigit Args((Char));
-static Cell local readDecChar Args((Void));
+static Bool local lazyReadMatches ( String );
+static Cell local readEscapeChar ( Bool );
+static Void local skipGap ( Void );
+static Cell local readCtrlChar ( Void );
+static Cell local readOctChar ( Void );
+static Cell local readHexChar ( Void );
+static Int local readHexDigit ( Char );
+static Cell local readDecChar ( Void );
-static Void local goOffside Args((Int));
-static Void local unOffside Args((Void));
-static Bool local canUnOffside Args((Void));
+static Void local goOffside ( Int );
+static Void local unOffside ( Void );
+static Bool local canUnOffside ( Void );
-static Void local skipWhitespace Args((Void));
-static Int local yylex Args((Void));
-static Int local repeatLast Args((Void));
+static Void local skipWhitespace ( Void );
+static Int local yylex ( Void );
+static Int local repeatLast ( Void );
-static Void local parseInput Args((Int));
+static Cell local parseInput ( Int );
-static Bool local doesNotExceed Args((String,Int,Int));
-static Int local stringToInt Args((String,Int));
+static Bool local doesNotExceed ( String,Int,Int );
+static Int local stringToInt ( String,Int );
/* --------------------------------------------------------------------------
static Text textThen, textElse, textWhere, textLet, textIn;
static Text textInfix, textInfixl, textInfixr, textForeign, textNewtype;
static Text textDefault, textDeriving, textDo, textClass, textInstance;
+#if IPARAM
+static Text textWith, textDlet;
+#endif
static Text textCoco, textEq, textUpto, textAs, textLambda;
static Text textBar, textMinus, textFrom, textArrow, textLazy;
static Text textWildcard;
static Text textModule, textImport, textInterface, textInstImport;
-static Text textHiding, textQualified, textAsMod;
+static Text textHiding, textQualified, textAsMod, textPrivileged;
static Text textExport, textDynamic, textUUExport;
-static Text textUnsafe, textUUAll;
+static Text textUnsafe, textUUAll, textUUUsage;
+
+Text textCcall; /* ccall */
+Text textStdcall; /* stdcall */
Text textNum; /* Num */
+Text textPrelPrim; /* PrelPrim */
Text textPrelude; /* Prelude */
Text textPlus; /* (+) */
#define LARGE 0x04
#define SYMBOL 0x08
#define IDAFTER 0x10
-#define SPACE 0x20
+#define ZPACE 0x20
#define PRINT 0x40
static Void local initCharTab() { /* Initialize char decode table */
setChar (IDAFTER, '\''); /* Characters in identifier */
setCopy (IDAFTER, (DIGIT|SMALL|LARGE));
- setChar (SPACE, ' '); /* ASCII space character */
- setChar (SPACE, 160); /* ISO non breaking space */
- setRange(SPACE, 9,13); /* special whitespace: \t\n\v\f\r */
+ setChar (ZPACE, ' '); /* ASCII space character */
+ setChar (ZPACE, 160); /* ISO non breaking space */
+ setRange(ZPACE, 9,13); /* special whitespace: \t\n\v\f\r */
setChars(PRINT, "(),;[]_`{}"); /* Special characters */
setChars(PRINT, " '\""); /* Space and quotes */
*
* At the lowest level of input, characters are read one at a time, with the
* current character held in c0 and the following (lookahead) character in
- * c1. The corrdinates of c0 within the file are held in (column,row).
+ * c1. The coordinates of c0 within the file are held in (column,row).
* The input stream is advanced by one character using the skip() function.
* ------------------------------------------------------------------------*/
static String nextChar;
#define nextConsoleChar() \
(unsigned char)(*nextChar=='\0' ? '\n' : *nextChar++)
-extern Void add_history Args((String));
-extern String readline Args((String));
#else
#define nextConsoleChar() getc(stdin)
#endif
if (s[i] != '\0') { /* check s `isPrefixOf` line */
return FALSE;
}
- while (isIn(line[i], SPACE)) { /* allow whitespace at end of line */
+ while (isIn(line[i], ZPACE)) { /* allow whitespace at end of line */
++i;
}
return (line[i] == '\0');
closeAnyInput();
}
else if (reading==KEYBOARD) {
- allowBreak();
+ /* allowBreak(); */
if (c0=='\n')
c1 = EOF;
else {
c1 = nextConsoleChar();
- /* On Win32, hitting ctrl-C causes the next getchar to
- * fail - returning "-1" to indicate an error.
- * This is one of the rare cases where "-1" does not mean EOF.
- */
- if (EOF == c1 && !feof(stdin)) {
+#if IS_WIN32
+ Sleep(0);
+#endif
+ /* On Win32, hitting ctrl-C causes the next getchar to
+ * fail - returning "-1" to indicate an error.
+ * This is one of the rare cases where "-1" does not mean EOF.
+ */
+ if (EOF == c1 && (!feof(stdin) /* || broken==TRUE */)) {
c1 = ' ';
}
}
litLines++;
return;
}
- while (c0 != '\n' && isIn(c0,SPACE)) /* maybe line is blank? */
+ while (c0 != '\n' && isIn(c0,ZPACE)) /* maybe line is blank? */
skip();
if (c0=='\n' || c0==EOF)
thisLineIs(BLANKLINE);
} while (isISO(c0) && isIn(c0,IDAFTER));
endToken();
identType = isIn(tokenStr[0],LARGE) ? CONID : VARID;
- return findText(tokenStr);
+ if (readingInterface)
+ return unZcodeThenFindText(tokenStr); else
+ return findText(tokenStr);
}
ERRMSG(row) "Illegal escape sequence"
EEND;
}
- else if (isIn(c0,SPACE)) {
+ else if (isIn(c0,ZPACE)) {
if (isStrLit) {
skipGap();
return NIL;
newlineSkip();
else
skip();
- while (isISO(c0) && isIn(c0,SPACE));
+ while (isISO(c0) && isIn(c0,ZPACE));
if (c0!='\\') {
ERRMSG(row) "Missing `\\' terminating string literal gap"
EEND;
String t = s;
Char c;
while ((c = *t)!=0 && isISO(c)
- && isIn(c,PRINT) && c!='"' && !isIn(c,SPACE)) {
+ && isIn(c,PRINT) && c!='"' && !isIn(c,ZPACE)) {
t++;
}
if (*t) {
do { /* which is empty */
saveTokenChar(c0);
skip();
- } while (c0!=EOF && !isIn(c0,SPACE));
+ } while (c0!=EOF && !isIn(c0,ZPACE));
endToken();
for (; cmds->cmdString; ++cmds)
return 0;
startToken();
- while (c0!=EOF && !isIn(c0,SPACE)) {
+ while (c0!=EOF && !isIn(c0,ZPACE)) {
if (c0=='"') {
skip();
while (c0!=EOF && c0!='\"') {
* - Otherwise, if no `{' follows the keywords WHERE/LET or OF, a SOFT `{'
* is inserted with the column number of the first token after the
* WHERE/LET/OF keyword.
- * - When a soft indentation is uppermost on the indetation stack with
+ * - When a soft indentation is uppermost on the indentation stack with
* column col' we insert:
* `}' in front of token with column<col' and pop indentation off stack,
* `;' in front of token with column==col'.
static Void local goOffside(col) /* insert offside marker */
Int col; { /* for specified column */
-assert(offsideON);
+ assert(offsideON);
if (indentDepth>=MAXINDENT) {
ERRMSG(row) "Too many levels of program nesting"
EEND;
}
static Void local unOffside() { /* leave layout rule area */
-assert(offsideON);
+ assert(offsideON);
indentDepth--;
}
static Bool local canUnOffside() { /* Decide if unoffside permitted */
-assert(offsideON);
+ assert(offsideON);
return indentDepth>=0 && layout[indentDepth]!=HARD;
}
return; /* report allows ... */
else if (c0=='\n')
newlineSkip();
- else if (isIn(c0,SPACE))
+ else if (isIn(c0,ZPACE))
skip();
else if (c0=='{' && c1=='-') { /* (potentially) nested comment */
Int nesting = 1;
* Now try to identify token type:
* --------------------------------------------------------------------*/
+ if (readingInterface) {
+ if (c0 == '(' && c1 == '#') { skip(); skip(); return UTL; };
+ if (c0 == '#' && c1 == ')') { skip(); skip(); return UTR; };
+ }
+
switch (c0) {
case EOF : return 0; /* End of file/input */
return STRINGLIT;
}
+#if IPARAM
+ if (c0=='?' && isIn(c1,SMALL) && !haskell98) {
+ Text it; /* Look for implicit param name */
+ skip();
+ it = readIdent();
+ top() = yylval = ap(IPVAR,it);
+ return identType=IPVARID;
+ }
+#endif
#if TREX
if (c0=='#' && isIn(c1,SMALL) && !haskell98) {
Text it; /* Look for record selector name */
if (it==textImport) return IMPORT;
if (it==textExport) return EXPORT;
if (it==textDynamic) return DYNAMIC;
+ if (it==textCcall) return CCALL;
+ if (it==textStdcall) return STDKALL;
if (it==textUUExport) return UUEXPORT;
if (it==textHiding) return HIDING;
if (it==textQualified) return QUALIFIED;
if (it==textAsMod) return ASMOD;
if (it==textWildcard) return '_';
if (it==textAll && !haskell98) return ALL;
+#if IPARAM
+ if (it==textWith && !haskell98) lookAhead(WITH);
+ if (it==textDlet && !haskell98) lookAhead(DLET);
+#endif
if (it==textUUAll) return ALL;
+ if (it==textUUUsage) return UUUSAGE;
if (it==textRepeat && reading==KEYBOARD)
return repeatLast();
* main entry points to parser/lexer:
* ------------------------------------------------------------------------*/
-static Void local parseInput(startWith)/* Parse input with given first tok,*/
+static Cell local parseInput(startWith)/* Parse input with given first tok,*/
Int startWith; { /* determining whether to read a */
- firstToken = TRUE; /* script or an expression */
+ Cell final = NIL; /* script or an expression */
+ firstToken = TRUE;
firstTokenIs = startWith;
- if (startWith==INTERFACE)
- offsideON = FALSE; else
- offsideON = TRUE;
+ if (startWith==INTERFACE) {
+ offsideON = FALSE; readingInterface = TRUE;
+ } else {
+ offsideON = TRUE; readingInterface = FALSE;
+ }
clearStack();
if (yyparse()) { /* This can only be parser overflow */
ERRMSG(row) "Parser overflow" /* as all syntax errors are caught */
EEND; /* in the parser... */
}
- drop();
- if (!stackEmpty()) /* stack should now be empty */
- internal("parseInput");
-}
-#ifdef HSCRIPT
-static String memPrefix = "@mem@";
-static Int lenMemPrefix = 5; /* strlen(memPrefix)*/
+ if (startWith==SCRIPT) pop(); /* zap spurious closing } token */
+ final = pop();
-Void makeMemScript(mem,fname)
-String mem;
-String fname; {
- strcat(fname,memPrefix);
- itoa((int)mem, fname+strlen(fname), 10);
+ if (!stackEmpty()) /* stack should now be empty */
+ internal("parseInput");
+ return final;
}
-Bool isMemScript(fname)
-String fname; {
- return (strstr(fname,memPrefix) != NULL);
+Void parseExp() { /* Read an expression to evaluate */
+ parseInput(EXPR);
+ setLastExpr(inputExpr);
}
-String memScriptString(fname)
-String fname; {
- String p = strstr(fname,memPrefix);
- if (p) {
- return (String)atoi(p+lenMemPrefix);
- } else {
- return NULL;
- }
+#if EXPLAIN_INSTANCE_RESOLUTION
+Void parseContext() { /* Read a context to prove */
+ parseInput(CONTEXT);
}
+#endif
-Void parseScript(fname,len) /* Read a script, possibly from mem */
-String fname;
-Long len; {
- input(RESET);
- if (isMemScript(fname)) {
- char* s = memScriptString(fname);
- stringInput(s);
- } else {
- fileInput(fname,len);
- }
- parseInput(SCRIPT);
-}
-#else
-Void parseScript(nm,len) /* Read a script */
+Cell parseInterface(nm,len) /* Read a GHC interface file */
String nm;
Long len; { /* Used to set a target for reading */
- input(RESET);
- fileInput(nm,len);
- parseInput(SCRIPT);
+ input(RESET);
+ Printf("Reading interface \"%s\"\n", nm );
+ fileInput(nm,len);
+ return parseInput(INTERFACE);
}
-#endif
-Void parseExp() { /* Read an expression to evaluate */
- parseInput(EXPR);
- setLastExpr(inputExpr);
-}
-
-Void parseInterface(nm,len) /* Read a GHC interface file */
+Cell parseModule(nm,len) /* Read a module */
String nm;
Long len; { /* Used to set a target for reading */
input(RESET);
+ Printf("Reading source file \"%s\"\n", nm );
fileInput(nm,len);
- parseInput(INTERFACE);
+ return parseInput(SCRIPT);
}
Void input(what)
Int what; {
switch (what) {
- case INSTALL : initCharTab();
+ case POSTPREL: break;
+
+ case PREPREL : initCharTab();
textCase = findText("case");
textOfK = findText("of");
textData = findText("data");
textDeriving = findText("deriving");
textDo = findText("do");
textClass = findText("class");
+#if IPARAM
+ textWith = findText("with");
+ textDlet = findText("dlet");
+#endif
textInstance = findText("instance");
textCoco = findText("::");
textEq = findText("=");
textBang = findText("!");
textDot = findText(".");
textImplies = findText("=>");
+ textPrelPrim = findText("PrelPrim");
textPrelude = findText("Prelude");
textNum = findText("Num");
textModule = findText("module");
textInstImport = findText("__instimport");
textExport = findText("export");
textDynamic = findText("dynamic");
+ textCcall = findText("ccall");
+ textStdcall = findText("stdcall");
textUUExport = findText("__export");
textImport = findText("import");
textHiding = findText("hiding");
textWildcard = findText("_");
textAll = findText("forall");
textUUAll = findText("__forall");
+ textUUUsage = findText("__u");
varMinus = mkVar(textMinus);
varPlus = mkVar(textPlus);
varBang = mkVar(textBang);
instDefns = NIL;
selDefns = NIL;
genDefns = NIL;
- //primDefns = NIL;
unqualImports= NIL;
foreignImports= NIL;
foreignExports= NIL;
mark(instDefns);
mark(selDefns);
mark(genDefns);
- //mark(primDefns);
mark(unqualImports);
mark(foreignImports);
mark(foreignExports);
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