Exemplo n.º 1
0
func zeroFor(targ *cc.Type) *cc.Expr {
	if targ != nil {
		k := targ.Def().Kind
		switch k {
		case c2go.String:
			return &cc.Expr{Op: cc.String, Texts: []string{`""`}}

		case c2go.Slice, cc.Ptr:
			return &cc.Expr{Op: cc.Name, Text: "nil"}

		case cc.Struct, cc.Array:
			return &cc.Expr{Op: cc.CastInit, Type: targ, Init: &cc.Init{}}

		case c2go.Bool:
			return &cc.Expr{Op: cc.Name, Text: "false"}
		}

		if c2go.Int8 <= k && k <= c2go.Float64 {
			return &cc.Expr{Op: cc.Number, Text: "0"}
		}
		return &cc.Expr{Op: cc.Number, Text: "0 /*" + targ.String() + "*/"}
	}

	return &cc.Expr{Op: cc.Number, Text: "0 /*untyped*/"}
}
Exemplo n.º 2
0
func inferCompatible(t1, t2 *cc.Type) bool {
	t1 = t1.Def()
	t2 = t2.Def()
	if isNumericCType(t1) && isNumericCType(t2) {
		return true
	}
	if t1.Kind == cc.Ptr && t1.Base.Kind == cc.Func {
		t1 = t1.Base
	}
	if t2.Kind == cc.Ptr && t2.Base.Kind == cc.Func {
		t2 = t2.Base
	}
	if sameType(t1, t2) {
		return true
	}
	if t1.Kind > t2.Kind {
		t1, t2 = t2, t1
	}
	if t1.Kind == cc.Ptr && t2.Kind == cc.Array && (t1.Base.Is(cc.Void) || sameType(t1.Base, t2.Base)) {
		return true
	}
	if t1.Kind == cc.Ptr && t2.Kind == cc.Ptr && (t1.Base.Is(cc.Void) || t2.Base.Is(cc.Void)) {
		return true
	}
	return false
}
Exemplo n.º 3
0
func sameType(t, u *cc.Type) bool {
	t = t.Def()
	u = u.Def()
	if t == u {
		return true
	}
	if t == nil || u == nil {
		return false
	}
	if t.Kind != u.Kind {
		return false
	}
	if t.Name != "" || u.Name != "" {
		return t.Name == u.Name
	}
	if !sameType(t.Base, u.Base) || len(t.Decls) != len(u.Decls) {
		return false
	}
	for i, td := range t.Decls {
		ud := u.Decls[i]
		if !sameType(td.Type, ud.Type) || t.Kind == cc.Struct && td.Name != ud.Name {
			return false
		}
	}
	return true
}
Exemplo n.º 4
0
func (p *Printer) printInit(typ *cc.Type, x *cc.Init) {
	p.Print(x.Comments.Before)
	defer p.Print(x.Comments.Suffix, x.Comments.After)

	if len(x.Prefix) > 0 {
		for _, pre := range x.Prefix {
			p.Print(pre)
		}
	}
	if x.Expr != nil {
		if x.Expr.Op == cc.Number && (typ.Is(cc.Ptr) || typ.Is(Slice)) {
			p.Print("nil")
			return
		}
		p.printExpr(x.Expr, precComma)
		return
	}

	nl := len(x.Braced) > 0 && x.Braced[0].Span.Start.Line != x.Braced[len(x.Braced)-1].Span.End.Line
	if typ != nil {
		p.printType(typ)
	}
	p.Print("{")
	if nl {
		p.Print(Indent)
	}
	warned := false
	for i, y := range x.Braced {
		if nl {
			p.Print(Newline)
		} else if i > 0 {
			p.Print(" ")
		}
		var subtyp *cc.Type
		if typ != nil {
			if typ.Is(cc.Struct) && i < len(typ.Def().Decls) && len(y.Prefix) == 0 {
				subtyp = typ.Def().Decls[i].Type
			} else if typ.Is(cc.Struct) && len(y.Prefix) == 1 && y.Prefix[0].XDecl != nil {
				subtyp = y.Prefix[0].XDecl.Type
			} else if typ.Is(cc.Array) || typ.Is(Slice) {
				subtyp = typ.Def().Base
			} else if !warned {
				warned = true
				fprintf(x.Span, "too many fields in braced initializer of %s", GoString(typ))
			}
		}
		p.printInit(subtyp, y)
		p.Print(",")
	}
	if typ != nil && typ.Is(cc.Struct) && len(x.Braced) > 0 && len(x.Braced[0].Prefix) == 0 && len(x.Braced) < len(typ.Def().Decls) {
		for i := len(x.Braced); i < len(typ.Def().Decls); i++ {
			subtyp := typ.Def().Decls[i].Type
			if subtyp.Is(cc.Ptr) || subtyp.Is(Slice) {
				p.Print(" nil,")
			} else if subtyp.Is(cc.Array) {
				p.Print(" ", subtyp, "{},")
			} else {
				p.Print(" 0,")
			}
		}
	}
	if nl {
		p.Print(Unindent, Newline)
	}
	p.Print("}")
}