{`package a1; const _ = 0`, `0`, `untyped int`, `0`},
		{`package a2; const _ = 'A'`, `'A'`, `untyped rune`, `65`},
		{`package a3; const _ = 0.`, `0.`, `untyped float`, `0`},
		{`package a4; const _ = 0i`, `0i`, `untyped complex`, `(0 + 0i)`},
		{`package a5; const _ = "foo"`, `"foo"`, `untyped string`, `"foo"`},

		{`package b0; var _ = false`, `false`, `bool`, `false`},
		{`package b1; var _ = 0`, `0`, `int`, `0`},

		{`package a1; const _ = 0`, `0`, `untyped int`, `0`},
		{`package a2; const _ = 'A'`, `'A'`, `untyped rune`, `65`},
		{`package a3; const _ = 0.`, `0.`, `untyped float`, `0`},
		{`package a4; const _ = 0i`, `0i`, `untyped complex`, `(0 + 0i)`},
		{`package a5; const _ = "foo"`, `"foo"`, `untyped string`, `"foo"`},

		{`package b0; var _ = false`, `false`, `bool`, `false`},
		{`package b1; var _ = 0`, `0`, `int`, `0`},

	},
	err: "xml: EncodeToken of ProcInst with invalid Target",
}, {
	desc: "directive",
	toks: []Token{
		Directive("foo"),
	},
	want: `<!foo>`,
}, {
	desc: "more complex directive",
	toks: []Token{
		Directive("DOCTYPE doc [ <!ELEMENT doc '>'> <!-- com>ment --> ]"),
	},
	want: `<!DOCTYPE doc [ <!ELEMENT doc '>'> <!-- com>ment --> ]>`,
}, {

		// to the g0 stack to run host C code.
		// We can't reliably unwind the SP (we might not even be on
		// the stack we think we are), so stop the traceback here.
		//
		// The one exception (encoded in the complex condition above) is that
		// we assume if we're doing a precise traceback, and this is the
		// innermost frame, that the SPWRITE function voluntarily preempted itself on entry