diogo/yap-6.3
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imake sure -1 is read independently of the current syntax operator.

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This commit is contained in:
Vitor Santos Costa 2011-04-26 18:51:02 +01:00
parent 697f7c650c
commit 9f6426fb95
1 changed files with 41 additions and 40 deletions
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81
C/parser.c
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@ -440,54 +440,55 @@ ParseTerm(int prio, JMPBUFF *FailBuff USES_REGS)
case Name_tok: case Name_tok:
t = Yap_tokptr->TokInfo; t = Yap_tokptr->TokInfo;
NextToken; NextToken;
/* special rules apply for +1, -2.3, etc... */
if (Yap_tokptr->Tok == Number_tok) {
if ((Atom)t == AtomMinus) {
t = Yap_tokptr->TokInfo;
if (IsIntTerm(t))
t = MkIntTerm(-IntOfTerm(t));
else if (IsFloatTerm(t))
t = MkFloatTerm(-FloatOfTerm(t));
#ifdef USE_GMP
else if (IsBigIntTerm(t)) {
t = Yap_gmp_neg_big(t);
}
#endif
else
t = MkLongIntTerm(-LongIntOfTerm(t));
NextToken;
break;
}
}
if ((Yap_tokptr->Tok != Ord(Ponctuation_tok) if ((Yap_tokptr->Tok != Ord(Ponctuation_tok)
|| Unsigned(Yap_tokptr->TokInfo) != 'l') || Unsigned(Yap_tokptr->TokInfo) != 'l')
&& IsPrefixOp((Atom)t, &opprio, &oprprio PASS_REGS) && IsPrefixOp((Atom)t, &opprio, &oprprio PASS_REGS)
) { ) {
/* special rules apply for +1, -2.3, etc... */ if (Yap_tokptr->Tok == Name_tok) {
if (Yap_tokptr->Tok == Number_tok) { Atom at = (Atom)Yap_tokptr->TokInfo;
if ((Atom)t == AtomMinus) {
t = Yap_tokptr->TokInfo;
if (IsIntTerm(t))
t = MkIntTerm(-IntOfTerm(t));
else if (IsFloatTerm(t))
t = MkFloatTerm(-FloatOfTerm(t));
#ifdef USE_GMP
else if (IsBigIntTerm(t)) {
t = Yap_gmp_neg_big(t);
}
#endif
else
t = MkLongIntTerm(-LongIntOfTerm(t));
NextToken;
break;
}
} else if (Yap_tokptr->Tok == Name_tok) {
Atom at = (Atom)Yap_tokptr->TokInfo;
#ifndef _MSC_VER #ifndef _MSC_VER
if ((Atom)t == AtomPlus) { if ((Atom)t == AtomPlus) {
if (at == AtomInf) { if (at == AtomInf) {
t = MkFloatTerm(INFINITY); t = MkFloatTerm(INFINITY);
NextToken; NextToken;
break;
} else if (at == AtomNan) {
t = MkFloatTerm(NAN);
NextToken;
break; break;
} else if (at == AtomNan) {
t = MkFloatTerm(NAN);
NextToken;
break;
}
} else if ((Atom)t == AtomMinus) {
if (at == AtomInf) {
t = MkFloatTerm(-INFINITY);
NextToken;
break;
} else if (at == AtomNan) {
t = MkFloatTerm(NAN);
NextToken;
break;
}
} }
} else if ((Atom)t == AtomMinus) {
if (at == AtomInf) {
t = MkFloatTerm(-INFINITY);
NextToken;
break;
} else if (at == AtomNan) {
t = MkFloatTerm(NAN);
NextToken;
break;
}
}
#endif #endif
} }
if (opprio <= prio) { if (opprio <= prio) {
/* try to parse as a prefix operator */ /* try to parse as a prefix operator */
TRY( TRY(