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author | Ondřej Surý <ondrej@sury.org> | 2011-09-13 13:13:40 +0200 |
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committer | Ondřej Surý <ondrej@sury.org> | 2011-09-13 13:13:40 +0200 |
commit | 5ff4c17907d5b19510a62e08fd8d3b11e62b431d (patch) | |
tree | c0650497e988f47be9c6f2324fa692a52dea82e1 /src/pkg/template/parse/set.go | |
parent | 80f18fc933cf3f3e829c5455a1023d69f7b86e52 (diff) | |
download | golang-upstream/60.tar.gz |
Imported Upstream version 60upstream/60
Diffstat (limited to 'src/pkg/template/parse/set.go')
-rw-r--r-- | src/pkg/template/parse/set.go | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/src/pkg/template/parse/set.go b/src/pkg/template/parse/set.go new file mode 100644 index 000000000..dca41ea76 --- /dev/null +++ b/src/pkg/template/parse/set.go @@ -0,0 +1,50 @@ +// Copyright 2011 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package parse + +import ( + "fmt" + "os" + "strconv" +) + +// Set returns a slice of Trees created by parsing the template set +// definition in the argument string. If an error is encountered, +// parsing stops and an empty slice is returned with the error. +func Set(text string, funcs ...map[string]interface{}) (tree map[string]*Tree, err os.Error) { + tree = make(map[string]*Tree) + defer (*Tree)(nil).recover(&err) + lex := lex("set", text) + const context = "define clause" + for { + t := New("set") // name will be updated once we know it. + t.startParse(funcs, lex) + // Expect EOF or "{{ define name }}". + if t.atEOF() { + break + } + t.expect(itemLeftDelim, context) + t.expect(itemDefine, context) + name := t.expect(itemString, context) + t.Name, err = strconv.Unquote(name.val) + if err != nil { + t.error(err) + } + t.expect(itemRightDelim, context) + end := t.parse(false) + if end == nil { + t.errorf("unexpected EOF in %s", context) + } + if end.Type() != nodeEnd { + t.errorf("unexpected %s in %s", end, context) + } + t.stopParse() + if _, present := tree[t.Name]; present { + return nil, fmt.Errorf("template: %q multiply defined", name) + } + tree[t.Name] = t + } + return +} |