hcl/ast/ast.go

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package ast
import "github.com/fatih/hcl/token"
// Node is an element in the abstract syntax tree.
type Node interface {
node()
Pos() token.Pos
}
func (ObjectList) node() {}
func (ObjectKey) node() {}
func (ObjectItem) node() {}
func (ObjectType) node() {}
func (LiteralType) node() {}
func (ListType) node() {}
// ObjectList represents a list of ObjectItems. An HCL file itself is an
// ObjectList.
type ObjectList struct {
Items []*ObjectItem
}
func (o *ObjectList) Add(item *ObjectItem) {
o.Items = append(o.Items, item)
}
func (o *ObjectList) Pos() token.Pos {
// always returns the uninitiliazed position
return o.Items[0].Pos()
}
// ObjectItem represents a HCL Object Item. An item is represented with a key
// (or keys). It can be an assignment or an object (both normal and nested)
type ObjectItem struct {
// keys is only one length long if it's of type assignment. If it's a
// nested object it can be larger than one. In that case "assign" is
// invalid as there is no assignments for a nested object.
Keys []*ObjectKey
// assign contains the position of "=", if any
Assign token.Pos
// val is the item itself. It can be an object,list, number, bool or a
// string. If key length is larger than one, val can be only of type
// Object.
Val Node
}
func (o *ObjectItem) Pos() token.Pos {
return o.Keys[0].Pos()
}
// ObjectKeys are either an identifier or of type string.
type ObjectKey struct {
Token token.Token
}
func (o *ObjectKey) Pos() token.Pos {
return o.Token.Pos
}
// LiteralType represents a literal of basic type. Valid types are:
// token.NUMBER, token.FLOAT, token.BOOL and token.STRING
type LiteralType struct {
Token token.Token
}
func (l *LiteralType) Pos() token.Pos {
return l.Token.Pos
}
// ListStatement represents a HCL List type
type ListType struct {
Lbrack token.Pos // position of "["
Rbrack token.Pos // position of "]"
List []Node // the elements in lexical order
}
func (l *ListType) Pos() token.Pos {
return l.Lbrack
}
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func (l *ListType) Add(node Node) {
l.List = append(l.List, node)
}
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// ObjectType represents a HCL Object Type
type ObjectType struct {
Lbrace token.Pos // position of "{"
Rbrace token.Pos // position of "}"
List []Node // the nodes in lexical order
}
func (b *ObjectType) Pos() token.Pos {
return b.Lbrace
}