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// code examples for godoc
package toml
import (
"fmt"
)
func ExampleNodeFilterFn_filterExample() {
tree, _ := Load(`
[struct_one]
foo = "foo"
bar = "bar"
[struct_two]
baz = "baz"
gorf = "gorf"
`)
// create a query that references a user-defined-filter
query, _ := CompileQuery("$[?(bazOnly)]")
// define the filter, and assign it to the query
query.SetFilter("bazOnly", func(node interface{}) bool {
if tree, ok := node.(*TomlTree); ok {
return tree.Has("baz")
}
return false // reject all other node types
})
// results contain only the 'struct_two' TomlTree
query.Execute(tree)
}
func ExampleQuery_queryExample() {
config, _ := Load(`
[[book]]
title = "The Stand"
author = "Stephen King"
[[book]]
title = "For Whom the Bell Tolls"
author = "Ernest Hemmingway"
[[book]]
title = "Neuromancer"
author = "William Gibson"
`)
// find and print all the authors in the document
authors, _ := config.Query("$.book.author")
for _, name := range authors.Values() {
fmt.Println(name)
}
}
func Example_comprehensiveExample() {
config, err := LoadFile("config.toml")
if err != nil {
fmt.Println("Error ", err.Error())
} else {
// retrieve data directly
user := config.Get("postgres.user").(string)
password := config.Get("postgres.password").(string)
// or using an intermediate object
configTree := config.Get("postgres").(*TomlTree)
user = configTree.Get("user").(string)
password = configTree.Get("password").(string)
fmt.Println("User is ", user, ". Password is ", password)
// show where elements are in the file
fmt.Printf("User position: %v\n", configTree.GetPosition("user"))
fmt.Printf("Password position: %v\n", configTree.GetPosition("password"))
// use a query to gather elements without walking the tree
results, _ := config.Query("$..[user,password]")
for ii, item := range results.Values() {
fmt.Printf("Query result %d: %v\n", ii, item)
}
}
}
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