db80229899
* Persue the default/optional checking if a property value == nil.
* Use the Interface() function to convert a reflect.Type to its underlying
interface{} value. This is required for typechecking to check out.
* Also, unrelated to the above, change type assertions to use nil rather than
allocating real objects. Although minimal, this incurs less GC pressure.
43 lines
1 KiB
Go
43 lines
1 KiB
Go
// Copyright 2016 Marapongo, Inc. All rights reserved.
|
|
|
|
package diag
|
|
|
|
import (
|
|
"io/ioutil"
|
|
"path/filepath"
|
|
)
|
|
|
|
// Document is a file used during compilation, for which advanced diagnostics, such as line/column numbers, may be
|
|
// required. It stores the contents of the entire file so that precise errors can be given; Forget discards them.
|
|
type Document struct {
|
|
File string
|
|
Body []byte
|
|
Parent *Document // if this document was generated from another, this will point to it.
|
|
}
|
|
|
|
var _ Diagable = (*Document)(nil) // compile-time assertion that *Document implements Diagable.
|
|
|
|
func NewDocument(file string) *Document {
|
|
return &Document{File: file}
|
|
}
|
|
|
|
func ReadDocument(file string) (*Document, error) {
|
|
body, err := ioutil.ReadFile(file)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return &Document{File: file, Body: body}, nil
|
|
}
|
|
|
|
func (doc *Document) Ext() string {
|
|
return filepath.Ext(doc.File)
|
|
}
|
|
|
|
func (doc *Document) Forget() {
|
|
doc.Body = nil
|
|
}
|
|
|
|
func (doc *Document) Where() (*Document, *Location) {
|
|
return doc, nil
|
|
}
|