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text/template,html/template: document that partial results may be written on error

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Fixes #7445.

LGTM=bradfitz
R=golang-codereviews, bradfitz
CC=golang-codereviews
https://golang.org/cl/94640043
This commit is contained in:
Rob Pike 2014-05-19 14:29:45 -07:00
parent a663e0a038
commit 431b96bdbe
2 changed files with 12 additions and 0 deletions
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6
src/pkg/html/template/template.go
View File

@ -62,6 +62,9 @@ func (t *Template) escape() error {
// Execute applies a parsed template to the specified data object,
// writing the output to wr.
// If an error occurs executing the template or writing its output,
// execution stops, but partial results may already have been written to
// the output writer.
// A template may be executed safely in parallel.
func (t *Template) Execute(wr io.Writer, data interface{}) error {
if err := t.escape(); err != nil {
@ -72,6 +75,9 @@ func (t *Template) Execute(wr io.Writer, data interface{}) error {
// ExecuteTemplate applies the template associated with t that has the given
// name to the specified data object and writes the output to wr.
// If an error occurs executing the template or writing its output,
// execution stops, but partial results may already have been written to
// the output writer.
// A template may be executed safely in parallel.
func (t *Template) ExecuteTemplate(wr io.Writer, name string, data interface{}) error {
tmpl, err := t.lookupAndEscapeTemplate(name)

6
src/pkg/text/template/exec.go
View File

@ -108,6 +108,9 @@ func errRecover(errp *error) {
// ExecuteTemplate applies the template associated with t that has the given name
// to the specified data object and writes the output to wr.
// If an error occurs executing the template or writing its output,
// execution stops, but partial results may already have been written to
// the output writer.
// A template may be executed safely in parallel.
func (t *Template) ExecuteTemplate(wr io.Writer, name string, data interface{}) error {
tmpl := t.tmpl[name]
@ -119,6 +122,9 @@ func (t *Template) ExecuteTemplate(wr io.Writer, name string, data interface{})
// Execute applies a parsed template to the specified data object,
// and writes the output to wr.
// If an error occurs executing the template or writing its output,
// execution stops, but partial results may already have been written to
// the output writer.
// A template may be executed safely in parallel.
func (t *Template) Execute(wr io.Writer, data interface{}) (err error) {
defer errRecover(&err)