gc: drop ideal bool

R=golang-dev, ken2
CC=golang-dev
https://golang.org/cl/5674098

src/cmd/gc/const.c

@@ -660,7 +660,6 @@ evconst(Node *n)
 		}
 		mpdivfltflt(v.u.fval, rv.u.fval);
 		break;
-
 	case TUP(OADD, CTCPLX):
 		mpaddfltflt(&v.u.cval->real, &rv.u.cval->real);
 		mpaddfltflt(&v.u.cval->imag, &rv.u.cval->imag);
@@ -936,7 +935,7 @@ nodlit(Val v)
 		n->type = idealstring;
 		break;
 	case CTBOOL:
-		n->type = idealbool;
+		n->type = types[TBOOL];
 		break;
 	case CTINT:
 	case CTRUNE:
@@ -1025,7 +1024,7 @@ defaultlit(Node **np, Type *t)
 			defaultlit(&n->left, t);
 			defaultlit(&n->right, t);
 		}
-		if(n->type == idealbool || n->type == idealstring)
+		if(n->type == types[TBOOL] || n->type == idealstring)
 			n->type = types[n->type->etype];
 		else
 			n->type = n->left->type;

src/cmd/gc/export.c

@@ -122,7 +122,7 @@ reexportdep(Node *n)
 
 	case OLITERAL:
 		t = n->type;
-		if(t != types[n->type->etype] && t != idealbool && t != idealstring) {
+		if(t != types[n->type->etype] && t != idealstring) {
 			if(isptr[t->etype])
 				t = t->type;
 			if (t && t->sym && t->sym->def && t->sym->pkg != localpkg  && t->sym->pkg != builtinpkg) {

src/cmd/gc/fmt.c

@@ -602,7 +602,7 @@ typefmt(Fmt *fp, Type *t)
 	}
 
 	if(t->etype < nelem(basicnames) && basicnames[t->etype] != nil) {
-		if(fmtmode == FErr && (t == idealbool || t == idealstring))
+		if(fmtmode == FErr && t == idealstring)
 			fmtstrcpy(fp, "ideal ");
 		return fmtstrcpy(fp, basicnames[t->etype]);
 	}
@@ -1086,7 +1086,7 @@ exprfmt(Fmt *f, Node *n, int prec)
 			return fmtprint(f, "%S", n->sym);
 		if(n->val.ctype == CTNIL)
 			n = n->orig; // if this node was a nil decorated with at type, print the original naked nil
-		if(n->type != types[n->type->etype] && n->type != idealbool && n->type != idealstring) {
+		if(n->type != types[n->type->etype] && n->type != idealstring) {
 			// Need parens when type begins with what might
 			// be misinterpreted as a unary operator: * or <-.
 			if(isptr[n->type->etype] || (n->type->etype == TCHAN && n->type->chan == Crecv))

src/cmd/gc/go.h

@@ -775,7 +775,6 @@ EXTERN	Idir*	idirs;
 
 EXTERN	Type*	types[NTYPE];
 EXTERN	Type*	idealstring;
-EXTERN	Type*	idealbool;
 EXTERN	Type*	bytetype;
 EXTERN	Type*	runetype;
 EXTERN	Type*	errortype;

src/cmd/gc/lex.c

@@ -1824,17 +1824,16 @@ lexinit(void)
 	// this is the ideal form
 	// (the type of x in const x = "hello").
 	idealstring = typ(TSTRING);
-	idealbool = typ(TBOOL);
 
 	s = pkglookup("true", builtinpkg);
 	s->def = nodbool(1);
 	s->def->sym = lookup("true");
-	s->def->type = idealbool;
+	s->def->type = types[TBOOL];
 
 	s = pkglookup("false", builtinpkg);
 	s->def = nodbool(0);
 	s->def->sym = lookup("false");
-	s->def->type = idealbool;
+	s->def->type = types[TBOOL];
 
 	s = lookup("_");
 	s->block = -100;

src/cmd/gc/subr.c

@@ -768,7 +768,7 @@ nodbool(int b)
 	c = nodintconst(0);
 	c->val.ctype = CTBOOL;
 	c->val.u.bval = b;
-	c->type = idealbool;
+	c->type = types[TBOOL];
 	return c;
 }
 
@@ -929,7 +929,7 @@ isideal(Type *t)
 {
 	if(t == T)
 		return 0;
-	if(t == idealstring || t == idealbool)
+	if(t == idealstring)
 		return 1;
 	switch(t->etype) {
 	case TNIL:

test/fixedbugs/bug285.go

@@ -20,7 +20,6 @@ func main() {
 	type B bool
 	b := B(false)
 	mb := make(map[B]int)
-	mb[false] = 42 // this should work: false is assignment compatible with B
 	mb[b] = 42
 
 	type Z int

test/named.go

@@ -31,7 +31,6 @@ func asString(String) {}
 
 func (Map) M() {}
 
-
 // These functions check at run time that the default type
 // (in the absence of any implicit conversion hints)
 // is the given type.
@@ -47,7 +46,7 @@ func isString(x interface{}) { _ = x.(String) }
 func main() {
 	var (
 		a     Array
-		b     Bool   = true
+		b     Bool   = Bool(true)
 		c     Chan   = make(Chan)
 		f     Float  = 1
 		i     Int    = 1
@@ -67,7 +66,6 @@ func main() {
 	isBool(b)
 	asBool(!b)
 	isBool(!b)
-	asBool(true)
 	asBool(*&b)
 	isBool(*&b)
 	asBool(Bool(true))

test/named1.go

@@ -26,7 +26,7 @@ type String string
 
 func main() {
 	var (
-		b    Bool = true
+		b    Bool = Bool(true)
 		i, j int
 		c    = make(chan int)
 		m    = make(Map)
@@ -34,7 +34,7 @@ func main() {
 
 	asBool(b)
 	asBool(!b)
-	asBool(true)
+	asBool(true) // ERROR "cannot use.*type bool.*as type Bool"
 	asBool(*&b)
 	asBool(Bool(true))
 	asBool(1 != 2) // ERROR "cannot use.*type bool.*as type Bool"