bool Parser::ParseCharacterStarLengthSpec(DeclSpec &DS) {
ExprResult Len;
if(ConsumeIfPresent(tok::l_paren)) {
if(ConsumeIfPresent(tok::star)) {
DS.setStartLengthSelector();
} else Len = ParseExpectedFollowupExpression("(");
if(!ExpectAndConsume(tok::r_paren))
return true;
}
else Len = ParseExpectedFollowupExpression("*");
if(Len.isInvalid()) return true;
if(Len.isUsable()) DS.setLengthSelector(Len.take());
return false;
}
/// ParseDeclarationTypeSpec - Parse a declaration type spec construct.
///
/// [R502]:
/// declaration-type-spec :=
/// intrinsic-type-spec
/// or TYPE ( derived-type-spec )
/// or CLASS ( derived-type-spec )
/// or CLASS ( * )
bool Parser::ParseDeclarationTypeSpec(DeclSpec &DS, bool AllowSelectors,
bool AllowOptionalCommaAfterCharLength) {
// [R403]:
// intrinsic-type-spec :=
// INTEGER [ kind-selector ]
// or REAL [ kind-selector ]
// or DOUBLE PRECISION
// or COMPLEX [ kind-selector ]
// or DOUBLE COMPLEX
// or CHARACTER [ char-selector ]
// or BYTE
// or LOGICAL [ kind-selector ]
switch (Tok.getKind()) {
default:
DS.SetTypeSpecType(DeclSpec::TST_unspecified);
break;
case tok::kw_INTEGER:
DS.SetTypeSpecType(DeclSpec::TST_integer);
break;
case tok::kw_REAL:
DS.SetTypeSpecType(DeclSpec::TST_real);
break;
case tok::kw_COMPLEX:
DS.SetTypeSpecType(DeclSpec::TST_complex);
break;
case tok::kw_CHARACTER:
DS.SetTypeSpecType(DeclSpec::TST_character);
break;
case tok::kw_BYTE:
DS.SetTypeSpecType(DeclSpec::TST_logical);
DS.setByte(); // equivalent to Kind = 1
break;
case tok::kw_LOGICAL:
DS.SetTypeSpecType(DeclSpec::TST_logical);
break;
case tok::kw_DOUBLEPRECISION:
DS.SetTypeSpecType(DeclSpec::TST_real);
DS.setDoublePrecision(); // equivalent to Kind = 8
break;
case tok::kw_DOUBLECOMPLEX:
DS.SetTypeSpecType(DeclSpec::TST_complex);
DS.setDoublePrecision(); // equivalent to Kind = 8
break;
}
if (DS.getTypeSpecType() == DeclSpec::TST_unspecified)
if (ParseTypeOrClassDeclTypeSpec(DS))
return true;
ExprResult Kind;
ExprResult Len;
// FIXME: no Kind for double complex, double precision and byte
switch (DS.getTypeSpecType()) {
case DeclSpec::TST_struct:
break;
default:
ConsumeToken();
if (ConsumeIfPresent(tok::star)) {
// FIXME: proper obsolete COMPLEX*16 support
ConsumeAnyToken();
DS.setDoublePrecision();
}
if (!AllowSelectors)
break;
if (ConsumeIfPresent(tok::l_paren)) {
Kind = ParseSelector(true);
if (Kind.isInvalid())
return true;
if(!ExpectAndConsume(tok::r_paren, 0, "", tok::r_paren))
return true;
}
break;
case DeclSpec::TST_character:
// [R424]:
// char-selector :=
// length-selector
// or ( LEN = type-param-value , KIND = scalar-int-initialization-expr )
// or ( type-param-value , #
// # [ KIND = ] scalar-int-initialization-expr )
// or ( KIND = scalar-int-initialization-expr [, LEN = type-param-value])
//
// [R425]:
// length-selector :=
// ( [ LEN = ] type-param-value )
// or * char-length [,]
//
// [R426]:
// char-length :=
// ( type-param-value )
// or scalar-int-literal-constant
//
// [R402]:
// type-param-value :=
// scalar-int-expr
// or *
// or :
ConsumeToken();
if(ConsumeIfPresent(tok::star)) {
ParseCharacterStarLengthSpec(DS);
if(AllowOptionalCommaAfterCharLength)
ConsumeIfPresent(tok::comma);
} else {
if (!AllowSelectors)
break;
if(ConsumeIfPresent(tok::l_paren)) {
if(IsPresent(tok::kw_LEN)) {
Len = ParseSelector(false);
if (Len.isInvalid())
return true;
} else if(IsPresent(tok::kw_KIND)) {
Kind = ParseSelector(true);
if (Kind.isInvalid())
return true;
} else {
Len = ParseExpectedFollowupExpression("(");
if(Len.isInvalid())
return true;
}
if(ConsumeIfPresent(tok::comma)) {
// FIXME:
if (Tok.is(tok::kw_LEN)) {
if (Len.isInvalid())
return Diag.ReportError(Tok.getLocation(),
"multiple LEN selectors for this type");
Len = ParseSelector(false);
if (Len.isInvalid())
return true;
} else if (Tok.is(tok::kw_KIND)) {
if (Kind.isInvalid())
return Diag.ReportError(Tok.getLocation(),
"multiple KIND selectors for this type");
Kind = ParseSelector(true);
if (Kind.isInvalid())
return true;
} else {
if (Kind.isInvalid())
return Diag.ReportError(Tok.getLocation(),
"multiple KIND selectors for this type");
ExprResult KindExpr = ParseExpression();
Kind = KindExpr;
}
}
if(!ExpectAndConsume(tok::r_paren))
return true;
}
}
break;
}
// Set the selectors for declspec.
if(Kind.isUsable()) DS.setKindSelector(Kind.get());
if(Len.isUsable()) DS.setLengthSelector(Len.get());
return false;
}