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// usage test: v ast path_to_v/cmd/tools/vast/test/demo.v
// will generate demo.json
// comment for module
module main
// import module
import os
import math
import time { Time, now }
// const decl
const (
a = 1
b = 3
c = 'c'
)
// struct decl
struct Point {
x int
mut:
y int
pub:
z int
pub mut:
name string
}
// method of Point
pub fn (p Point) get_x() int {
return p.x
}
// embed struct
struct MyPoint {
Point
title string
}
// enum type
enum Color {
red
green
blue
}
// type alias
type Myint = int
// sum type
type MySumType = bool | int | string
// function type
type Myfn = fn (int) int
// interface type
interface Myinterfacer {
add(int, int) int
sub(int, int) int
}
// main funciton
fn main() {
add(1, 3)
println(add(1, 2))
println('ok') // comment println
arr := [1, 3, 5, 7]
for a in arr {
println(a)
add(1, 3)
}
color := Color.red
println(color)
println(os.args)
m := math.max(1, 3)
println(m)
println(now())
t := Time{}
println(t)
p := Point{
x: 1
y: 2
z: 3
}
println(p)
my_point := MyPoint{
// x: 1
// y: 3
// z: 5
}
println(my_point.get_x())
}
// normal function
fn add(x int, y int) int {
return x + y
}
// function with defer stmt
fn defer_fn() {
mut x := 1
println('start fn')
defer {
println('in defer block')
println(x)
}
println('end fn')
}
// generic function
fn g_fn<T>(p T) T {
return p
}
// generic struct
struct GenericStruct<T> {
point Point
mut:
model T
}
// generic interface
interface Gettable<T> {
get() T
}
// generic sumtype
struct None {}
type MyOption<T> = Error | None | T
|
