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|
use crate::*;
use std::path::PathBuf;
macro_rules! as_number {
($type:ty, $name:expr, $error:ty) => {
paste::paste! {
pub fn [< as_ $type >](&mut self) -> $type {
self.[< as_ $type _opt >]().unwrap_or_else(|| self.missing("number"))
}
pub fn [< as_ $type _opt>](&mut self) -> Option<$type> {
self.value().as_ref().map(|v| v.trim().parse().unwrap_or_else(
|e: $error| self.error(&v, $name, e.to_string())))
}
}
};
}
pub struct QueriedValue {
pub doc: Option<String>,
pub name: String,
pub variant: QueryVariant,
/// Some if switch passed, then some if value passed.
pub value: Option<Option<String>>,
}
pub enum QueryVariant {
Positional(usize),
Named(String),
}
impl QueriedValue {
pub fn value(&self) -> Option<&String> {
match &self.value {
Some(value) => value.as_ref(),
None => None,
}
}
pub fn as_bool(self) -> bool {
if let Some(value) = self.value {
if let Some(value) = value {
match value.to_lowercase().as_str() {
"y"|"yes"|"t"|"true" => true,
"n"|"no" |"f"|"false" => false,
_ => true,
}
} else {
true
}
} else {
false
}
}
pub fn as_path(&mut self) -> PathBuf {
self.as_path_opt().unwrap_or_else(|| self.missing("path"))
}
pub fn as_path_opt(&mut self) -> Option<PathBuf> {
if let Some(value) = self.value() {
if !value.is_empty() {
return Some(PathBuf::from(value));
}
}
return None;
}
pub fn as_str(&mut self) -> &str {
self.value().map(|v| v.as_str()).unwrap_or_else(|| self.missing("string"))
}
pub fn as_str_opt(&mut self) -> Option<&str> {
self.value().map(|v| v.as_str())
}
pub fn as_string(&mut self) -> String {
self.as_str().to_string()
}
pub fn as_string_opt(&mut self) -> Option<String> {
self.as_str_opt().map(|s| s.to_string())
}
as_number!{ f32, "f32" , std::num::ParseFloatError }
as_number!{ f64, "f64" , std::num::ParseFloatError }
as_number!{ u8, "u8" , std::num::ParseIntError }
as_number!{ u16, "u16" , std::num::ParseIntError }
as_number!{ u32, "u32" , std::num::ParseIntError }
as_number!{ u64, "u64" , std::num::ParseIntError }
as_number!{ usize, "usize", std::num::ParseIntError }
as_number!{ i8, "i8" , std::num::ParseIntError }
as_number!{ i16, "i16" , std::num::ParseIntError }
as_number!{ i32, "i32" , std::num::ParseIntError }
as_number!{ i64, "i64" , std::num::ParseIntError }
as_number!{ isize, "isize", std::num::ParseIntError }
fn locator(&self) -> String {
match &self.variant {
QueryVariant::Positional(_) => {
let name = &self.name;
format!("<{name}> argument")
}
QueryVariant::Named(name) => {
format!("{name} switch")
}
}
}
fn error(&self, value: &str, ty: &str, err: String) -> ! {
let locator = self.locator();
fatal!("The value {value:?} passed to the {locator} could not be parsed as a {ty}: {err}");
}
fn missing(&self, _ty: &str) -> ! {
let locator = self.locator();
fatal!("The {locator} is required");
}
}
|
