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change template function interface to

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func(w io.Write, value interface{}, format string)

R=r
DELTA=16  (3 added, 3 deleted, 10 changed)
OCL=27399
CL=27401
This commit is contained in:
Russ Cox 2009-04-13 19:29:23 -07:00
parent a20a50b0b2
commit 6d617a881a
2 changed files with 13 additions and 13 deletions
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11
src/lib/template/format.go
View File

@ -8,21 +8,20 @@ package template
import (
"fmt";
"io";
"reflect";
)
// HtmlFormatter formats arbitrary values for HTML
// TODO: do something for real.
func HtmlFormatter(v reflect.Value) string {
s := fmt.Sprint(reflect.Indirect(v).Interface());
return s;
func HtmlFormatter(w io.Write, value interface{}, format string) {
fmt.Fprint(w, value);
}
// StringFormatter formats returns the default string representation.
// It is stored under the name "str" and is the default formatter.
// You can override the default formatter by storing your default
// under the name "" in your custom formatter map.
func StringFormatter(v reflect.Value) string {
s := fmt.Sprint(reflect.Indirect(v).Interface());
return s;
func StringFormatter(w io.Write, value interface{}, format string) {
fmt.Fprint(w, value);
}

15
src/lib/template/template.go
View File

@ -48,8 +48,7 @@ const (
// FormatterMap is the type describing the mapping from formatter
// names to the functions that implement them.
// TODO(rsc): Maybe func should take interface{} instead?
type FormatterMap map[string] func(reflect.Value) string
type FormatterMap map[string] func(io.Write, interface{}, string)
// Built-in formatters.
var builtins = FormatterMap {
@ -437,7 +436,7 @@ func (t *template) varValue(name string) reflect.Value {
// Evalute a variable, looking up through the parent if necessary.
// If it has a formatter attached ({var|formatter}) run that too.
func (t *template) evalVariable(name_formatter string) string {
func (t *template) writeVariable(w io.Write, name_formatter string) {
name := name_formatter;
formatter := "";
bar := strings.Index(name_formatter, "|");
@ -445,16 +444,18 @@ func (t *template) evalVariable(name_formatter string) string {
name = name_formatter[0:bar];
formatter = name_formatter[bar+1:len(name_formatter)];
}
val := t.varValue(name);
val := t.varValue(name).Interface();
// is it in user-supplied map?
if t.fmap != nil {
if fn, ok := t.fmap[formatter]; ok {
return fn(val)
fn(w, val, formatter);
return;
}
}
// is it in builtin map?
if fn, ok := builtins[formatter]; ok {
return fn(val)
fn(w, val, formatter);
return;
}
t.error(ErrNoFormatter, ": ", formatter);
panic("notreached");
@ -484,7 +485,7 @@ func (t *template) execute() {
panic("unknown literal: ", w[0]);
}
case Variable:
t.wr.Write(io.StringBytes(t.evalVariable(w[0])));
t.writeVariable(t.wr, w[0]);
case Or, End, Alternates:
t.error(ErrSyntax, ": ", string(item));
case Section: