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proc: auto implement Context on command target

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Context and TryFromDsl overlap
This commit is contained in:
🪞👃🪞 2025-05-09 21:13:46 +03:00
parent 3bb38f2d27
commit 20ccff13de
5 changed files with 17 additions and 13 deletions
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10
dsl/src/dsl.rs
View file

@ -18,24 +18,20 @@ pub type ParseResult<T> = Result<T, ParseError>;
pub trait TryFromDsl<'state, T>: Sized {
fn try_from_expr <'source: 'state> (
_state: &'state T, _iter: TokenIter<'source>
_state: &'state T, _iter: &mut TokenIter<'source>
) -> Option<Self> {
None
}
fn try_from_atom <'source: 'state> (
state: &'state T, value: Value<'source>
) -> Option<Self> {
if let Exp(0, iter) = value {
return Self::try_from_expr(state, iter.clone())
if let Exp(0, mut iter) = value {
return Self::try_from_expr(state, &mut iter)
}
None
}
}
pub trait TryIntoDsl<T>: Sized {
fn try_into_atom (&self) -> Option<Value>;
}
/// Map EDN tokens to parameters of a given type for a given context
pub trait Context<'state, U>: Sized {
fn get <'source> (&'state self, _iter: &mut TokenIter<'source>) -> Option<U> {

4
input/src/input_dsl.rs
View file

@ -29,7 +29,7 @@ impl<'state, S, C: DslCommand<'state, S>, I: DslInput> KeyMap<'state, S, C, I> f
match exp_iter.next() {
Some(Token { value: Value::Sym(binding), .. }) => {
if input.matches_dsl(binding) {
if let Some(command) = C::try_from_expr(state, exp_iter.clone()) {
if let Some(command) = C::try_from_expr(state, &mut exp_iter) {
return Some(command)
}
}
@ -55,7 +55,7 @@ impl<'state, S, C: DslCommand<'state, S>, I: DslInput> KeyMap<'state, S, C, I> f
match exp_iter.next() {
Some(Token { value: Value::Sym(binding), .. }) => {
if input.matches_dsl(binding) {
if let Some(command) = C::try_from_expr(state, exp_iter.clone()) {
if let Some(command) = C::try_from_expr(state, &mut exp_iter) {
return Some(command)
}
}

4
output/src/ops/transform.rs
View file

@ -35,7 +35,7 @@ macro_rules! transform_xy {
#[cfg(feature = "dsl")]
impl<'state, E: Output + 'state, T: ViewContext<'state, E>> TryFromDsl<'state, T>
for $Enum<RenderBox<'state, E>> {
fn try_from_expr <'source: 'state> (state: &'state T, iter: TokenIter<'source>)
fn try_from_expr <'source: 'state> (state: &'state T, iter: &mut TokenIter<'source>)
-> Option<Self>
{
let mut iter = iter.clone();
@ -88,7 +88,7 @@ macro_rules! transform_xy_unit {
#[cfg(feature = "dsl")]
impl<'state, E: Output + 'state, T: ViewContext<'state, E>> TryFromDsl<'state, T>
for $Enum<E::Unit, RenderBox<'state, E>> {
fn try_from_expr <'source: 'state> (state: &'state T, iter: TokenIter<'source>) -> Option<Self> {
fn try_from_expr <'source: 'state> (state: &'state T, iter: &mut TokenIter<'source>) -> Option<Self> {
let mut iter = iter.clone();
if let Some(Token { value: Value::Key(k), .. }) = iter.peek() {
if k == $x || k == $y {

2
output/src/view.rs
View file

@ -103,7 +103,7 @@ pub trait ViewContext<'state, E: Output + 'state>: Send + Sync
> TryFromDsl<$lt_state, T> for $Struct {
fn try_from_expr <$lt_source: $lt_state> (
$state: &$lt_state T,
$iter: TokenIter<$lt_source>
$iter: &mut TokenIter<$lt_source>
) -> Option<Self> {
let mut $iter = $iter.clone();
$body;

10
proc/src/proc_command.rs
View file

@ -70,7 +70,7 @@ impl ToTokens for CommandDef {
/// Generated by [tengri_proc].
impl<'state> TryFromDsl<'state, #target> for #enumeration {
fn try_from_expr <'source: 'state> (
state: &'state #target, iter: TokenIter<'source>
state: &'state #target, iter: &mut ::tengri::dsl::TokenIter<'source>
) -> Option<Self> {
let mut iter = iter.clone();
match iter.next() {
@ -80,6 +80,14 @@ impl ToTokens for CommandDef {
}
}
/// Generated by [tengri_proc].
impl<'state> ::tengri::dsl::Context<'state, #enumeration> for #target {
fn get <'source> (&self, iter: &mut ::tengri::dsl::TokenIter<'source>)
-> Option<#enumeration>
{
#enumeration::try_from_expr(self, iter)
}
}
/// Generated by [tengri_proc].
impl Command<#target> for #enumeration {
fn execute (self, state: &mut #target) -> Perhaps<Self> {
match self {