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Diffstat (limited to 'libgo/go/text/template/parse.go')
-rw-r--r-- | libgo/go/text/template/parse.go | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/libgo/go/text/template/parse.go b/libgo/go/text/template/parse.go new file mode 100644 index 0000000..fa56214 --- /dev/null +++ b/libgo/go/text/template/parse.go @@ -0,0 +1,89 @@ +// 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 template + +import ( + "reflect" + "text/template/parse" +) + +// Template is the representation of a parsed template. +type Template struct { + name string + *parse.Tree + leftDelim string + rightDelim string + // We use two maps, one for parsing and one for execution. + // This separation makes the API cleaner since it doesn't + // expose reflection to the client. + parseFuncs FuncMap + execFuncs map[string]reflect.Value + set *Set // can be nil. +} + +// Name returns the name of the template. +func (t *Template) Name() string { + return t.name +} + +// Parsing. + +// New allocates a new template with the given name. +func New(name string) *Template { + return &Template{ + name: name, + parseFuncs: make(FuncMap), + execFuncs: make(map[string]reflect.Value), + } +} + +// Delims sets the action delimiters, to be used in a subsequent +// parse, to the specified strings. +// An empty delimiter stands for the corresponding default: {{ or }}. +// The return value is the template, so calls can be chained. +func (t *Template) Delims(left, right string) *Template { + t.leftDelim = left + t.rightDelim = right + return t +} + +// Funcs adds the elements of the argument map to the template's function +// map. It panics if a value in the map is not a function with appropriate +// return type. +// The return value is the template, so calls can be chained. +func (t *Template) Funcs(funcMap FuncMap) *Template { + addValueFuncs(t.execFuncs, funcMap) + addFuncs(t.parseFuncs, funcMap) + return t +} + +// Parse parses the template definition string to construct an internal +// representation of the template for execution. +func (t *Template) Parse(s string) (tmpl *Template, err error) { + t.Tree, err = parse.New(t.name).Parse(s, t.leftDelim, t.rightDelim, t.parseFuncs, builtins) + if err != nil { + return nil, err + } + return t, nil +} + +// ParseInSet parses the template definition string to construct an internal +// representation of the template for execution. It also adds the template +// to the set. It is an error if s is already defined in the set. +// Function bindings are checked against those in the set. +func (t *Template) ParseInSet(s string, set *Set) (tmpl *Template, err error) { + var setFuncs FuncMap + if set != nil { + setFuncs = set.parseFuncs + } + t.Tree, err = parse.New(t.name).Parse(s, t.leftDelim, t.rightDelim, t.parseFuncs, setFuncs, builtins) + if err != nil { + return nil, err + } + if set != nil { + err = set.add(t) + } + return t, err +} |