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template:

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* do full lookup for {.section},
  	so that it is always allowed to replace
	{Foo} with {.section Foo}{@}{.end}
  * treat False as empty so that .section can
  	be used to test bools

R=r
DELTA=29  (21 added, 0 deleted, 8 changed)
OCL=34215
CL=34219
This commit is contained in:
Russ Cox 2009-09-01 16:31:49 -07:00
parent f56e6fd786
commit 59db1f7bb1
2 changed files with 28 additions and 7 deletions
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16
src/pkg/template/template.go
View File

@ -595,6 +595,8 @@ func empty(v reflect.Value) bool {
return true
}
switch v := v.(type) {
case *reflect.BoolValue:
return v.Get() == false;
case *reflect.StringValue:
return v.Get() == "";
case *reflect.StructValue:
@ -608,13 +610,13 @@ func empty(v reflect.Value) bool {
}
// Look up a variable, up through the parent if necessary.
func (t *Template) varValue(v *variableElement, st *state) reflect.Value {
field := st.findVar(v.name);
func (t *Template) varValue(name string, st *state) reflect.Value {
field := st.findVar(name);
if field == nil {
if st.parent == nil {
t.execError(st, t.linenum, "name not found: %s", v.name)
t.execError(st, t.linenum, "name not found: %s", name)
}
return t.varValue(v, st.parent);
return t.varValue(name, st.parent);
}
return field;
}
@ -623,7 +625,7 @@ func (t *Template) varValue(v *variableElement, st *state) reflect.Value {
// If it has a formatter attached ({var|formatter}) run that too.
func (t *Template) writeVariable(v *variableElement, st *state) {
formatter := v.formatter;
val := t.varValue(v, st).Interface();
val := t.varValue(v.name, st).Interface();
// is it in user-supplied map?
if t.fmap != nil {
if fn, ok := t.fmap[v.formatter]; ok {
@ -673,7 +675,7 @@ func (t *Template) execute(start, end int, st *state) {
// Execute a .section
func (t *Template) executeSection(s *sectionElement, st *state) {
// Find driver data for this section. It must be in the current struct.
field := st.findVar(s.field);
field := t.varValue(s.field, st);
if field == nil {
t.execError(st, s.linenum, ".section: cannot find field %s in %s", s.field, reflect.Indirect(st.data).Type());
}
@ -718,7 +720,7 @@ func iter(v reflect.Value) *reflect.ChanValue {
// Execute a .repeated section
func (t *Template) executeRepeated(r *repeatedElement, st *state) {
// Find driver data for this section. It must be in the current struct.
field := st.findVar(r.field);
field := t.varValue(r.field, st);
if field == nil {
t.execError(st, r.linenum, ".repeated: cannot find field %s in %s", r.field, reflect.Indirect(st.data).Type());
}

19
src/pkg/template/template_test.go
View File

@ -35,6 +35,8 @@ type S struct {
emptystring string;
null []*T;
vec *vector.Vector;
true bool;
false bool;
}
var t1 = T{ "ItemNumber1", "ValueNumber1" }
@ -234,6 +236,14 @@ var tests = []*Test {
out: "ItemNumber1=ValueNumber1\n"
},
&Test{
in: "{.section @ }\n"
"{innerT.item}={.section innerT}{.section value}{@}{.end}{.end}\n"
"{.end}",
out: "ItemNumber1=ValueNumber1\n"
},
// Formatters
&Test{
@ -260,6 +270,13 @@ var tests = []*Test {
out: "\nheader\n"
},
&Test {
in: "{.section true}1{.or}2{.end}\n"
"{.section false}3{.or}4{.end}\n",
out: "1\n4\n"
},
}
func TestAll(t *testing.T) {
@ -276,6 +293,8 @@ func TestAll(t *testing.T) {
s.vec = vector.New(0);
s.vec.Push("elt1");
s.vec.Push("elt2");
s.true = true;
s.false = false;
var buf bytes.Buffer;
for i, test := range tests {