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use std::fmt::Debug;
use super::func::FuncHeader;
use super::span::Spanned;
use super::expr::{Expr, Tuple, NamedTuple, Object};
use super::*;
/// Check whether the expected and found results are the same.
pub fn check<T>(src: &str, exp: T, found: T, cmp_spans: bool)
where T: Debug + PartialEq + SpanlessEq {
let cmp = if cmp_spans { PartialEq::eq } else { SpanlessEq::spanless_eq };
if !cmp(&exp, &found) {
println!("source: {:?}", src);
println!("expected: {:#?}", exp);
println!("found: {:#?}", found);
panic!("test failed");
}
}
/// Create a vector of optionally spanned expressions from a list description.
///
/// # Examples
/// ```
/// // With spans
/// spanned![(0:0, 0:5, "hello"), (0:5, 0:3, "world")]
///
/// // Without spans: Implicit zero spans.
/// spanned!["hello", "world"]
/// ```
macro_rules! span_vec {
($(($sl:tt:$sc:tt, $el:tt:$ec:tt, $v:expr)),* $(,)?) => {
(vec![$(span_item!(($sl:$sc, $el:$ec, $v))),*], true)
};
($($v:expr),* $(,)?) => {
(vec![$(span_item!($v)),*], false)
};
}
macro_rules! span_item {
(($sl:tt:$sc:tt, $el:tt:$ec:tt, $v:expr)) => ({
use $crate::syntax::span::{Pos, Span, Spanned};
Spanned {
span: Span::new(
Pos::new($sl, $sc),
Pos::new($el, $ec)
),
v: $v
}
});
($v:expr) => {
$crate::syntax::span::Spanned::zero($v)
};
}
function! {
/// Most functions in the tests are parsed into the debug function for easy
/// inspection of arguments and body.
#[derive(Debug, Clone, PartialEq)]
pub struct DebugFn {
pub header: FuncHeader,
pub body: Option<SyntaxModel>,
}
parse(header, body, state, f) {
let cloned = header.clone();
header.args.pos.items.clear();
header.args.key.pairs.clear();
DebugFn {
header: cloned,
body: body!(opt: body, state, f),
}
}
layout(self, ctx, f) { vec![] }
}
/// Compares elements by only looking at values and ignoring spans.
pub trait SpanlessEq<Rhs=Self> {
fn spanless_eq(&self, other: &Rhs) -> bool;
}
impl SpanlessEq for SyntaxModel {
fn spanless_eq(&self, other: &SyntaxModel) -> bool {
self.nodes.spanless_eq(&other.nodes)
}
}
impl SpanlessEq for Node {
fn spanless_eq(&self, other: &Node) -> bool {
fn downcast<'a>(func: &'a (dyn Model + 'static)) -> &'a DebugFn {
func.downcast::<DebugFn>().expect("not a debug fn")
}
match (self, other) {
(Node::Model(a), Node::Model(b)) => {
downcast(a.as_ref()).spanless_eq(downcast(b.as_ref()))
}
(a, b) => a == b,
}
}
}
impl SpanlessEq for DebugFn {
fn spanless_eq(&self, other: &DebugFn) -> bool {
self.header.name.v == other.header.name.v
&& self.header.args.pos.spanless_eq(&other.header.args.pos)
&& self.header.args.key.spanless_eq(&other.header.args.key)
}
}
impl SpanlessEq for Expr {
fn spanless_eq(&self, other: &Expr) -> bool {
match (self, other) {
(Expr::Tuple(a), Expr::Tuple(b)) => a.spanless_eq(b),
(Expr::NamedTuple(a), Expr::NamedTuple(b)) => a.spanless_eq(b),
(Expr::Object(a), Expr::Object(b)) => a.spanless_eq(b),
(Expr::Neg(a), Expr::Neg(b)) => a.spanless_eq(&b),
(Expr::Add(a1, a2), Expr::Add(b1, b2)) => a1.spanless_eq(&b1) && a2.spanless_eq(&b2),
(Expr::Sub(a1, a2), Expr::Sub(b1, b2)) => a1.spanless_eq(&b1) && a2.spanless_eq(&b2),
(Expr::Mul(a1, a2), Expr::Mul(b1, b2)) => a1.spanless_eq(&b1) && a2.spanless_eq(&b2),
(Expr::Div(a1, a2), Expr::Div(b1, b2)) => a1.spanless_eq(&b1) && a2.spanless_eq(&b2),
(a, b) => a == b,
}
}
}
impl SpanlessEq for Tuple {
fn spanless_eq(&self, other: &Tuple) -> bool {
self.items.len() == other.items.len()
&& self.items.iter().zip(&other.items)
.all(|(x, y)| x.v.spanless_eq(&y.v))
}
}
impl SpanlessEq for NamedTuple {
fn spanless_eq(&self, other: &NamedTuple) -> bool {
self.name.v == other.name.v
&& self.tuple.v.spanless_eq(&other.tuple.v)
}
}
impl SpanlessEq for Object {
fn spanless_eq(&self, other: &Object) -> bool {
self.pairs.len() == other.pairs.len()
&& self.pairs.iter().zip(&other.pairs)
.all(|(x, y)| x.v.key.v == y.v.key.v && x.v.value.v.spanless_eq(&y.v.value.v))
}
}
impl<T: SpanlessEq> SpanlessEq for Vec<T> {
fn spanless_eq(&self, other: &Vec<T>) -> bool {
self.len() == other.len()
&& self.iter().zip(other).all(|(x, y)| x.spanless_eq(&y))
}
}
impl<T: SpanlessEq> SpanlessEq for Spanned<T> {
fn spanless_eq(&self, other: &Spanned<T>) -> bool {
self.v.spanless_eq(&other.v)
}
}
impl<T: SpanlessEq> SpanlessEq for Box<T> {
fn spanless_eq(&self, other: &Box<T>) -> bool {
(&**self).spanless_eq(&**other)
}
}
macro_rules! impl_through_partial_eq {
($type:ty) => {
impl SpanlessEq for $type {
fn spanless_eq(&self, other: &$type) -> bool {
self == other
}
}
};
}
impl_through_partial_eq!(Token<'_>);
// Implement for string and decoration to be able to compare feedback.
impl_through_partial_eq!(String);
impl_through_partial_eq!(Decoration);
|
