package go/ast
A FieldList represents a list of Fields, enclosed by parentheses or braces.
NumFields returns the number of (named and anonymous fields) in a FieldList.
Golang go/ast.FieldList type, End(), NumFields() and Pos() functions usage examples
Example 1:
func NodeDescription(n ast.Node) string {
switch n := n.(type) {
case *ast.ArrayType:
return "array type"
case *ast.FieldList:
return "field/method/parameter list"
...
}
Example 2:
func checkCurrentPosition(node ast.Node) string {
n := node.(*ast.FieldList)
endpos := n.End()
pospos := n.Pos()
if pospos != endpos {
return "not yet"
}
}
Example 3:
var sig *ast.FuncType
res := sig.Results
n := res.NumFields()
if n == 0 {
// do something
}
Reference :
http://golang.org/pkg/go/ast/#FieldList
http://golang.org/pkg/go/ast/#FieldList.NumFields
http://golang.org/pkg/go/ast/#FieldList.End
http://golang.org/pkg/go/ast/#FieldList.Pos
