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slint/internal/compiler/lookup.rs
Yuri Astrakhan 9621cae218 Auto-fixed clippy::needless_lifetimes 
`__CARGO_FIX_YOLO=1` is a hack, but it does help a lot with the tedious fixes where the result is fairly clear.

See https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes

```
__CARGO_FIX_YOLO=1 cargo clippy --fix --all-targets --workspace --exclude gstreamer-player --exclude i-slint-backend-linuxkms --exclude uefi-demo --exclude ffmpeg -- -A clippy::all -W clippy::needless_lifetimes

cargo fmt --all
```
2025-02-07 09:20:49 +01:00

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// Copyright © SixtyFPS GmbH <info@slint.dev>
// SPDX-License-Identifier: GPL-3.0-only OR LicenseRef-Slint-Royalty-free-2.0 OR LicenseRef-Slint-Software-3.0
//! Helper to do lookup in expressions
use std::rc::Rc;
use crate::diagnostics::{BuildDiagnostics, Spanned};
use crate::expression_tree::{
BuiltinFunction, BuiltinMacroFunction, Callable, EasingCurve, Expression, Unit,
};
use crate::langtype::{ElementType, Enumeration, EnumerationValue, Type};
use crate::namedreference::NamedReference;
use crate::object_tree::{ElementRc, PropertyVisibility};
use crate::parser::NodeOrToken;
use crate::typeregister::TypeRegister;
use smol_str::{SmolStr, ToSmolStr};
use std::cell::RefCell;
mod named_colors;
/// Contains information which allow to lookup identifier in expressions
pub struct LookupCtx<'a> {
/// the name of the property for which this expression refers.
pub property_name: Option<&'a str>,
/// the type of the property for which this expression refers.
/// (some property come in the scope)
pub property_type: Type,
/// Here is the stack in which id applies. (the last element in the scope is looked up first)
pub component_scope: &'a [ElementRc],
/// Somewhere to report diagnostics
pub diag: &'a mut BuildDiagnostics,
/// The name of the arguments of the callback or function
pub arguments: Vec<SmolStr>,
/// The type register in which to look for Globals
pub type_register: &'a TypeRegister,
/// The type loader instance, which may be used to resolve relative path references
/// for example for img!
pub type_loader: Option<&'a crate::typeloader::TypeLoader>,
/// The token currently processed
pub current_token: Option<NodeOrToken>,
}
impl<'a> LookupCtx<'a> {
/// Return a context that is just suitable to build simple const expression
pub fn empty_context(type_register: &'a TypeRegister, diag: &'a mut BuildDiagnostics) -> Self {
Self {
property_name: Default::default(),
property_type: Default::default(),
component_scope: Default::default(),
diag,
arguments: Default::default(),
type_register,
type_loader: None,
current_token: None,
}
}
pub fn return_type(&self) -> &Type {
match &self.property_type {
Type::Callback(f) | Type::Function(f) => &f.return_type,
_ => &self.property_type,
}
}
pub fn is_legacy_component(&self) -> bool {
self.component_scope.first().is_some_and(|e| e.borrow().is_legacy_syntax)
}
/// True if the element is in the same component as the scope
pub fn is_local_element(&self, elem: &ElementRc) -> bool {
Option::zip(
elem.borrow().enclosing_component.upgrade(),
self.component_scope.first().and_then(|x| x.borrow().enclosing_component.upgrade()),
)
.map_or(true, |(x, y)| Rc::ptr_eq(&x, &y))
}
}
#[derive(Debug)]
pub enum LookupResult {
Expression {
expression: Expression,
/// When set, this is deprecated, and the string is the new name
deprecated: Option<String>,
},
Enumeration(Rc<Enumeration>),
Namespace(BuiltinNamespace),
Callable(LookupResultCallable),
}
#[derive(Debug)]
pub enum LookupResultCallable {
Callable(Callable),
Macro(BuiltinMacroFunction),
/// for example for `item.focus`, where `item` is the base
MemberFunction {
/// This becomes the first argument of the function call
base: Expression,
base_node: Option<NodeOrToken>,
member: Box<LookupResultCallable>,
},
}
#[derive(Debug, derive_more::Display)]
pub enum BuiltinNamespace {
Colors,
Math,
Key,
SlintInternal,
}
impl From<Expression> for LookupResult {
fn from(expression: Expression) -> Self {
Self::Expression { expression, deprecated: None }
}
}
impl From<Callable> for LookupResult {
fn from(callable: Callable) -> Self {
Self::Callable(LookupResultCallable::Callable(callable))
}
}
impl From<BuiltinMacroFunction> for LookupResult {
fn from(macro_function: BuiltinMacroFunction) -> Self {
Self::Callable(LookupResultCallable::Macro(macro_function))
}
}
impl From<BuiltinFunction> for LookupResult {
fn from(function: BuiltinFunction) -> Self {
Self::Callable(LookupResultCallable::Callable(Callable::Builtin(function)))
}
}
impl LookupResult {
pub fn deprecated(&self) -> Option<&str> {
match self {
Self::Expression { deprecated: Some(x), .. } => Some(x.as_str()),
_ => None,
}
}
}
/// Represent an object which has properties which can be accessible
pub trait LookupObject {
/// Will call the function for each entry (useful for completion)
/// If the function return Some, it will immediately be returned and not called further
fn for_each_entry<R>(
&self,
ctx: &LookupCtx,
f: &mut impl FnMut(&SmolStr, LookupResult) -> Option<R>,
) -> Option<R>;
/// Perform a lookup of a given identifier.
/// One does not have to re-implement unless we can make it faster
fn lookup(&self, ctx: &LookupCtx, name: &SmolStr) -> Option<LookupResult> {
self.for_each_entry(ctx, &mut |prop, expr| (prop == name).then_some(expr))
}
}
impl<T1: LookupObject, T2: LookupObject> LookupObject for (T1, T2) {
fn for_each_entry<R>(
&self,
ctx: &LookupCtx,
f: &mut impl FnMut(&SmolStr, LookupResult) -> Option<R>,
) -> Option<R> {
self.0.for_each_entry(ctx, f).or_else(|| self.1.for_each_entry(ctx, f))
}
fn lookup(&self, ctx: &LookupCtx, name: &SmolStr) -> Option<LookupResult> {
self.0.lookup(ctx, name).or_else(|| self.1.lookup(ctx, name))
}
}
impl LookupObject for LookupResult {
fn for_each_entry<R>(
&self,
ctx: &LookupCtx,
f: &mut impl FnMut(&SmolStr, LookupResult) -> Option<R>,
) -> Option<R> {
match self {
LookupResult::Expression { expression, .. } => expression.for_each_entry(ctx, f),
LookupResult::Enumeration(e) => e.for_each_entry(ctx, f),
LookupResult::Namespace(BuiltinNamespace::Colors) => {
(ColorSpecific, ColorFunctions).for_each_entry(ctx, f)
}
LookupResult::Namespace(BuiltinNamespace::Math) => MathFunctions.for_each_entry(ctx, f),
LookupResult::Namespace(BuiltinNamespace::Key) => KeysLookup.for_each_entry(ctx, f),
LookupResult::Namespace(BuiltinNamespace::SlintInternal) => {
SlintInternal.for_each_entry(ctx, f)
}
LookupResult::Callable(..) => None,
}
}
fn lookup(&self, ctx: &LookupCtx, name: &SmolStr) -> Option<LookupResult> {
match self {
LookupResult::Expression { expression, .. } => expression.lookup(ctx, name),
LookupResult::Enumeration(e) => e.lookup(ctx, name),
LookupResult::Namespace(BuiltinNamespace::Colors) => {
(ColorSpecific, ColorFunctions).lookup(ctx, name)
}
LookupResult::Namespace(BuiltinNamespace::Math) => MathFunctions.lookup(ctx, name),
LookupResult::Namespace(BuiltinNamespace::Key) => KeysLookup.lookup(ctx, name),
LookupResult::Namespace(BuiltinNamespace::SlintInternal) => {
SlintInternal.lookup(ctx, name)
}
LookupResult::Callable(..) => None,
}
}
}
struct ArgumentsLookup;
impl LookupObject for ArgumentsLookup {
fn for_each_entry<R>(
&self,
ctx: &LookupCtx,
f: &mut impl FnMut(&SmolStr, LookupResult) -> Option<R>,
) -> Option<R> {
let args = match &ctx.property_type {
Type::Callback(f) | Type::Function(f) => &f.args,
_ => return None,
};
for (index, (name, ty)) in ctx.arguments.iter().zip(args.iter()).enumerate() {
if let Some(r) =
f(name, Expression::FunctionParameterReference { index, ty: ty.clone() }.into())
{
return Some(r);
}
}
None
}
}
struct SpecialIdLookup;
impl LookupObject for SpecialIdLookup {
fn for_each_entry<R>(
&self,
ctx: &LookupCtx,
f: &mut impl FnMut(&SmolStr, LookupResult) -> Option<R>,
) -> Option<R> {
let last = ctx.component_scope.last();
let mut f = |n, e: Expression| f(&SmolStr::new_static(n), e.into());
None.or_else(|| f("self", Expression::ElementReference(Rc::downgrade(last?))))
.or_else(|| {
let len = ctx.component_scope.len();
if len >= 2 {
f(
"parent",
Expression::ElementReference(Rc::downgrade(&ctx.component_scope[len - 2]))
.into(),
)
} else {
None
}
})
.or_else(|| f("true", Expression::BoolLiteral(true)))
.or_else(|| f("false", Expression::BoolLiteral(false)))
// "root" is just a normal id
}
}
struct IdLookup;
impl LookupObject for IdLookup {
fn for_each_entry<R>(
&self,
ctx: &LookupCtx,
f: &mut impl FnMut(&SmolStr, LookupResult) -> Option<R>,
) -> Option<R> {
fn visit<R>(
root: &ElementRc,
f: &mut impl FnMut(&SmolStr, LookupResult) -> Option<R>,
) -> Option<R> {
if !root.borrow().id.is_empty() {
if let Some(r) =
f(&root.borrow().id, Expression::ElementReference(Rc::downgrade(root)).into())
{
return Some(r);
}
}
for x in &root.borrow().children {
if x.borrow().repeated.is_some() {
continue;
}
if let Some(r) = visit(x, f) {
return Some(r);
}
}
None
}
for e in ctx.component_scope.iter().rev() {
if e.borrow().repeated.is_some() {
if let Some(r) = visit(e, f) {
return Some(r);
}
}
}
if let Some(root) = ctx.component_scope.first() {
if let Some(r) = visit(root, f) {
return Some(r);
}
}
None
}
// TODO: hash based lookup
}
/// In-scope properties, or model
pub struct InScopeLookup;
impl InScopeLookup {
fn visit_scope<R>(
ctx: &LookupCtx,
mut visit_entry: impl FnMut(&SmolStr, LookupResult) -> Option<R>,
mut visit_legacy_scope: impl FnMut(&ElementRc) -> Option<R>,
mut visit_scope: impl FnMut(&ElementRc) -> Option<R>,
) -> Option<R> {
let is_legacy = ctx.is_legacy_component();
for (idx, elem) in ctx.component_scope.iter().rev().enumerate() {
if let Some(repeated) = &elem.borrow().repeated {
if !repeated.index_id.is_empty() {
if let Some(r) = visit_entry(
&repeated.index_id,
Expression::RepeaterIndexReference { element: Rc::downgrade(elem) }.into(),
) {
return Some(r);
}
}
if !repeated.model_data_id.is_empty() {
if let Some(r) = visit_entry(
&repeated.model_data_id,
Expression::RepeaterModelReference { element: Rc::downgrade(elem) }.into(),
) {
return Some(r);
}
}
}
if is_legacy {
if elem.borrow().repeated.is_some()
|| idx == 0
|| idx == ctx.component_scope.len() - 1
{
if let Some(r) = visit_legacy_scope(elem) {
return Some(r);
}
}
} else if let Some(r) = visit_scope(elem) {
return Some(r);
}
}
None
}
}
impl LookupObject for InScopeLookup {
fn for_each_entry<R>(
&self,
ctx: &LookupCtx,
f: &mut impl FnMut(&SmolStr, LookupResult) -> Option<R>,
) -> Option<R> {
let f = RefCell::new(f);
Self::visit_scope(
ctx,
|str, r| f.borrow_mut()(str, r),
|elem| elem.for_each_entry(ctx, *f.borrow_mut()),
|elem| {
for (name, prop) in &elem.borrow().property_declarations {
let e = expression_from_reference(
NamedReference::new(elem, name.clone()),
&prop.property_type,
None,
);
if let Some(r) = f.borrow_mut()(name, e) {
return Some(r);
}
}
None
},
)
}
fn lookup(&self, ctx: &LookupCtx, name: &SmolStr) -> Option<LookupResult> {
if name.is_empty() {
return None;
}
Self::visit_scope(
ctx,
|str, r| (str == name).then_some(r),
|elem| elem.lookup(ctx, name),
|elem| {
elem.borrow().property_declarations.get(name).map(|prop| {
expression_from_reference(
NamedReference::new(elem, name.clone()),
&prop.property_type,
None,
)
})
},
)
}
}
impl LookupObject for ElementRc {
fn for_each_entry<R>(
&self,
ctx: &LookupCtx,
f: &mut impl FnMut(&SmolStr, LookupResult) -> Option<R>,
) -> Option<R> {
for (name, prop) in &self.borrow().property_declarations {
let r = expression_from_reference(
NamedReference::new(self, name.clone()),
&prop.property_type,
check_deprecated_stylemetrics(self, ctx, name),
);
if let Some(r) = f(name, r) {
return Some(r);
}
}
let list = self.borrow().base_type.property_list();
for (name, ty) in list {
let e = expression_from_reference(NamedReference::new(self, name.clone()), &ty, None);
if let Some(r) = f(&name, e) {
return Some(r);
}
}
if !(matches!(self.borrow().base_type, ElementType::Global)) {
for (name, ty, _) in crate::typeregister::reserved_properties() {
let name = SmolStr::new_static(name);
let e =
expression_from_reference(NamedReference::new(self, name.clone()), &ty, None);
if let Some(r) = f(&name, e) {
return Some(r);
}
}
}
None
}
fn lookup(&self, ctx: &LookupCtx, name: &SmolStr) -> Option<LookupResult> {
let lookup_result = self.borrow().lookup_property(name);
if lookup_result.property_type != Type::Invalid
&& (lookup_result.is_local_to_component
|| lookup_result.property_visibility != PropertyVisibility::Private)
{
let deprecated = (lookup_result.resolved_name != name.as_str())
.then(|| lookup_result.resolved_name.to_string())
.or_else(|| check_deprecated_stylemetrics(self, ctx, name));
Some(expression_from_reference(
NamedReference::new(self, lookup_result.resolved_name.to_smolstr()),
&lookup_result.property_type,
deprecated,
))
} else {
None
}
}
}
pub fn check_deprecated_stylemetrics(
elem: &ElementRc,
ctx: &LookupCtx<'_>,
name: &SmolStr,
) -> Option<String> {
let borrow = elem.borrow();
(!ctx.type_register.expose_internal_types
&& matches!(
borrow.enclosing_component.upgrade().unwrap().id.as_str(),
"StyleMetrics" | "NativeStyleMetrics"
)
&& borrow
.debug
.first()
.and_then(|x| x.node.source_file())
.map_or(true, |x| x.path().starts_with("builtin:"))
&& !name.starts_with("layout-"))
.then(|| format!("Palette.{name}"))
}
fn expression_from_reference(
n: NamedReference,
ty: &Type,
deprecated: Option<String>,
) -> LookupResult {
match ty {
Type::Callback { .. } => Callable::Callback(n).into(),
Type::InferredCallback => Callable::Callback(n).into(),
Type::Function { .. } => Callable::Function(n).into(),
_ => LookupResult::Expression { expression: Expression::PropertyReference(n), deprecated },
}
}
/// Lookup for Globals and Enum.
struct LookupType;
impl LookupObject for LookupType {
fn for_each_entry<R>(
&self,
ctx: &LookupCtx,
f: &mut impl FnMut(&SmolStr, LookupResult) -> Option<R>,
) -> Option<R> {
for (name, ty) in ctx.type_register.all_types() {
if let Some(r) = Self::from_type(ty).and_then(|e| f(&name, e)) {
return Some(r);
}
}
for (name, ty) in ctx.type_register.all_elements() {
if let Some(r) = Self::from_element(ty, ctx, &name).and_then(|e| f(&name, e)) {
return Some(r);
}
}
None
}
fn lookup(&self, ctx: &LookupCtx, name: &SmolStr) -> Option<LookupResult> {
Self::from_type(ctx.type_register.lookup(name))
.or_else(|| Self::from_element(ctx.type_register.lookup_element(name).ok()?, ctx, name))
}
}
impl LookupType {
fn from_type(ty: Type) -> Option<LookupResult> {
match ty {
Type::Enumeration(e) => Some(LookupResult::Enumeration(e)),
_ => None,
}
}
fn from_element(el: ElementType, ctx: &LookupCtx, name: &str) -> Option<LookupResult> {
match el {
ElementType::Component(c) if c.is_global() => {
// Check if it is internal, but allow re-export (different name) eg: NativeStyleMetrics re-exported as StyleMetrics
if c.root_element
.borrow()
.builtin_type()
.is_some_and(|x| x.is_internal && x.name == name)
&& !ctx.type_register.expose_internal_types
{
None
} else {
Some(Expression::ElementReference(Rc::downgrade(&c.root_element)).into())
}
}
_ => None,
}
}
}
/// Lookup for things specific to the return type (eg: colors or enums)
pub struct ReturnTypeSpecificLookup;
impl LookupObject for ReturnTypeSpecificLookup {
fn for_each_entry<R>(
&self,
ctx: &LookupCtx,
f: &mut impl FnMut(&SmolStr, LookupResult) -> Option<R>,
) -> Option<R> {
match ctx.return_type() {
Type::Color => ColorSpecific.for_each_entry(ctx, f),
Type::Brush => ColorSpecific.for_each_entry(ctx, f),
Type::Easing => EasingSpecific.for_each_entry(ctx, f),
Type::Enumeration(enumeration) => enumeration.clone().for_each_entry(ctx, f),
_ => None,
}
}
fn lookup(&self, ctx: &LookupCtx, name: &SmolStr) -> Option<LookupResult> {
match ctx.return_type() {
Type::Color => ColorSpecific.lookup(ctx, name),
Type::Brush => ColorSpecific.lookup(ctx, name),
Type::Easing => EasingSpecific.lookup(ctx, name),
Type::Enumeration(enumeration) => enumeration.clone().lookup(ctx, name),
_ => None,
}
}
}
struct ColorSpecific;
impl LookupObject for ColorSpecific {
fn for_each_entry<R>(
&self,
_ctx: &LookupCtx,
f: &mut impl FnMut(&SmolStr, LookupResult) -> Option<R>,
) -> Option<R> {
for (name, c) in named_colors::named_colors().iter() {
if let Some(r) = f(&SmolStr::new_static(name), Self::as_result(*c)) {
return Some(r);
}
}
None
}
fn lookup(&self, _ctx: &LookupCtx, name: &SmolStr) -> Option<LookupResult> {
named_colors::named_colors().get(name.as_str()).map(|c| Self::as_result(*c))
}
}
impl ColorSpecific {
fn as_result(value: u32) -> LookupResult {
Expression::Cast {
from: Box::new(Expression::NumberLiteral(value as f64, Unit::None)),
to: Type::Color,
}
.into()
}
}
struct KeysLookup;
macro_rules! special_keys_lookup {
($($char:literal # $name:ident # $($qt:ident)|* # $($winit:ident $(($_pos:ident))?)|* # $($_xkb:ident)|*;)*) => {
impl LookupObject for KeysLookup {
fn for_each_entry<R>(
&self,
_ctx: &LookupCtx,
f: &mut impl FnMut(&SmolStr, LookupResult) -> Option<R>,
) -> Option<R> {
None
$(.or_else(|| {
let mut tmp = [0; 4];
f(&SmolStr::new_static(stringify!($name)), Expression::StringLiteral(SmolStr::new_inline($char.encode_utf8(&mut tmp))).into())
}))*
}
}
};
}
i_slint_common::for_each_special_keys!(special_keys_lookup);
struct EasingSpecific;
impl LookupObject for EasingSpecific {
fn for_each_entry<R>(
&self,
_ctx: &LookupCtx,
f: &mut impl FnMut(&SmolStr, LookupResult) -> Option<R>,
) -> Option<R> {
use EasingCurve::CubicBezier;
let mut curve = |n, e| f(&SmolStr::new_static(n), Expression::EasingCurve(e).into());
let r = None
.or_else(|| curve("linear", EasingCurve::Linear))
.or_else(|| curve("ease-in-quad", CubicBezier(0.11, 0.0, 0.5, 0.0)))
.or_else(|| curve("ease-out-quad", CubicBezier(0.5, 1.0, 0.89, 1.0)))
.or_else(|| curve("ease-in-out-quad", CubicBezier(0.45, 0.0, 0.55, 1.0)))
.or_else(|| curve("ease", CubicBezier(0.25, 0.1, 0.25, 1.0)))
.or_else(|| curve("ease-in", CubicBezier(0.42, 0.0, 1.0, 1.0)))
.or_else(|| curve("ease-in-out", CubicBezier(0.42, 0.0, 0.58, 1.0)))
.or_else(|| curve("ease-out", CubicBezier(0.0, 0.0, 0.58, 1.0)))
.or_else(|| curve("ease-in-quart", CubicBezier(0.5, 0.0, 0.75, 0.0)))
.or_else(|| curve("ease-out-quart", CubicBezier(0.25, 1.0, 0.5, 1.0)))
.or_else(|| curve("ease-in-out-quart", CubicBezier(0.76, 0.0, 0.24, 1.0)))
.or_else(|| curve("ease-in-quint", CubicBezier(0.64, 0.0, 0.78, 0.0)))
.or_else(|| curve("ease-out-quint", CubicBezier(0.22, 1.0, 0.36, 1.0)))
.or_else(|| curve("ease-in-out-quint", CubicBezier(0.83, 0.0, 0.17, 1.0)))
.or_else(|| curve("ease-in-expo", CubicBezier(0.7, 0.0, 0.84, 0.0)))
.or_else(|| curve("ease-out-expo", CubicBezier(0.16, 1.0, 0.3, 1.0)))
.or_else(|| curve("ease-in-out-expo", CubicBezier(0.87, 0.0, 0.13, 1.0)))
.or_else(|| curve("ease-in-back", CubicBezier(0.36, 0.0, 0.66, -0.56)))
.or_else(|| curve("ease-out-back", CubicBezier(0.34, 1.56, 0.64, 1.0)))
.or_else(|| curve("ease-in-out-back", CubicBezier(0.68, -0.6, 0.32, 1.6)))
.or_else(|| curve("ease-in-sine", CubicBezier(0.12, 0.0, 0.39, 0.0)))
.or_else(|| curve("ease-out-sine", CubicBezier(0.61, 1.0, 0.88, 1.0)))
.or_else(|| curve("ease-in-out-sine", CubicBezier(0.37, 0.0, 0.63, 1.0)))
.or_else(|| curve("ease-in-circ", CubicBezier(0.55, 0.0, 1.0, 0.45)))
.or_else(|| curve("ease-out-circ", CubicBezier(0.0, 0.55, 0.45, 1.0)))
.or_else(|| curve("ease-in-out-circ", CubicBezier(0.85, 0.0, 0.15, 1.0)))
.or_else(|| curve("ease-in-elastic", EasingCurve::EaseInElastic))
.or_else(|| curve("ease-out-elastic", EasingCurve::EaseOutElastic))
.or_else(|| curve("ease-in-out-elastic", EasingCurve::EaseInOutElastic))
.or_else(|| curve("ease-in-bounce", EasingCurve::EaseInBounce))
.or_else(|| curve("ease-out-bounce", EasingCurve::EaseOutBounce))
.or_else(|| curve("ease-in-out-bounce", EasingCurve::EaseInOutBounce));
r.or_else(|| {
f(&SmolStr::new_static("cubic-bezier"), BuiltinMacroFunction::CubicBezier.into())
})
}
}
impl LookupObject for Rc<Enumeration> {
fn for_each_entry<R>(
&self,
_ctx: &LookupCtx,
f: &mut impl FnMut(&SmolStr, LookupResult) -> Option<R>,
) -> Option<R> {
for (value, name) in self.values.iter().enumerate() {
if let Some(r) = f(
name,
Expression::EnumerationValue(EnumerationValue { value, enumeration: self.clone() })
.into(),
) {
return Some(r);
}
}
None
}
}
struct MathFunctions;
impl LookupObject for MathFunctions {
fn for_each_entry<R>(
&self,
_ctx: &LookupCtx,
f: &mut impl FnMut(&SmolStr, LookupResult) -> Option<R>,
) -> Option<R> {
let mut f = |n, e| f(&SmolStr::new_static(n), e);
let b = |b| LookupResult::from(Callable::Builtin(b));
None.or_else(|| f("mod", BuiltinMacroFunction::Mod.into()))
.or_else(|| f("round", b(BuiltinFunction::Round)))
.or_else(|| f("ceil", b(BuiltinFunction::Ceil)))
.or_else(|| f("floor", b(BuiltinFunction::Floor)))
.or_else(|| f("clamp", BuiltinMacroFunction::Clamp.into()))
.or_else(|| f("abs", BuiltinMacroFunction::Abs.into()))
.or_else(|| f("sqrt", b(BuiltinFunction::Sqrt)))
.or_else(|| f("max", BuiltinMacroFunction::Max.into()))
.or_else(|| f("min", BuiltinMacroFunction::Min.into()))
.or_else(|| f("sin", b(BuiltinFunction::Sin)))
.or_else(|| f("cos", b(BuiltinFunction::Cos)))
.or_else(|| f("tan", b(BuiltinFunction::Tan)))
.or_else(|| f("asin", b(BuiltinFunction::ASin)))
.or_else(|| f("acos", b(BuiltinFunction::ACos)))
.or_else(|| f("atan", b(BuiltinFunction::ATan)))
.or_else(|| f("atan2", b(BuiltinFunction::ATan2)))
.or_else(|| f("log", b(BuiltinFunction::Log)))
.or_else(|| f("pow", b(BuiltinFunction::Pow)))
}
}
struct SlintInternal;
impl LookupObject for SlintInternal {
fn for_each_entry<R>(
&self,
ctx: &LookupCtx,
f: &mut impl FnMut(&SmolStr, LookupResult) -> Option<R>,
) -> Option<R> {
let sl = || ctx.current_token.as_ref().map(|t| t.to_source_location());
let mut f = |n, e: LookupResult| f(&SmolStr::new_static(n), e);
let b = |b| LookupResult::from(Callable::Builtin(b));
None.or_else(|| {
let style = ctx.type_loader.and_then(|tl| tl.compiler_config.style.as_ref());
f(
"color-scheme",
if style.is_some_and(|s| s.ends_with("-light")) {
let e = crate::typeregister::BUILTIN.with(|e| e.enums.ColorScheme.clone());
Expression::EnumerationValue(e.try_value_from_string("light").unwrap())
} else if style.is_some_and(|s| s.ends_with("-dark")) {
let e = crate::typeregister::BUILTIN.with(|e| e.enums.ColorScheme.clone());
Expression::EnumerationValue(e.try_value_from_string("dark").unwrap())
} else {
Expression::FunctionCall {
function: BuiltinFunction::ColorScheme.into(),
arguments: vec![],
source_location: sl(),
}
}
.into(),
)
})
.or_else(|| {
f(
"use-24-hour-format",
Expression::FunctionCall {
function: BuiltinFunction::Use24HourFormat.into(),
arguments: vec![],
source_location: sl(),
}
.into(),
)
})
.or_else(|| f("month-day-count", b(BuiltinFunction::MonthDayCount)))
.or_else(|| f("month-offset", b(BuiltinFunction::MonthOffset)))
.or_else(|| f("format-date", b(BuiltinFunction::FormatDate)))
.or_else(|| f("date-now", b(BuiltinFunction::DateNow)))
.or_else(|| f("valid-date", b(BuiltinFunction::ValidDate)))
.or_else(|| f("parse-date", b(BuiltinFunction::ParseDate)))
}
}
struct ColorFunctions;
impl LookupObject for ColorFunctions {
fn for_each_entry<R>(
&self,
_ctx: &LookupCtx,
f: &mut impl FnMut(&SmolStr, LookupResult) -> Option<R>,
) -> Option<R> {
let mut f = |n, m| f(&SmolStr::new_static(n), LookupResult::from(m));
None.or_else(|| f("rgb", BuiltinMacroFunction::Rgb))
.or_else(|| f("rgba", BuiltinMacroFunction::Rgb))
.or_else(|| f("hsv", BuiltinMacroFunction::Hsv))
}
}
struct BuiltinFunctionLookup;
impl LookupObject for BuiltinFunctionLookup {
fn for_each_entry<R>(
&self,
ctx: &LookupCtx,
f: &mut impl FnMut(&SmolStr, LookupResult) -> Option<R>,
) -> Option<R> {
(MathFunctions, ColorFunctions)
.for_each_entry(ctx, f)
.or_else(|| f(&SmolStr::new_static("debug"), BuiltinMacroFunction::Debug.into()))
.or_else(|| {
f(&SmolStr::new_static("animation-tick"), BuiltinFunction::AnimationTick.into())
})
}
}
struct BuiltinNamespaceLookup;
impl LookupObject for BuiltinNamespaceLookup {
fn for_each_entry<R>(
&self,
ctx: &LookupCtx,
f: &mut impl FnMut(&SmolStr, LookupResult) -> Option<R>,
) -> Option<R> {
let mut f = |s, res| f(&SmolStr::new_static(s), res);
None.or_else(|| f("Colors", LookupResult::Namespace(BuiltinNamespace::Colors)))
.or_else(|| f("Math", LookupResult::Namespace(BuiltinNamespace::Math)))
.or_else(|| f("Key", LookupResult::Namespace(BuiltinNamespace::Key)))
.or_else(|| {
if ctx.type_register.expose_internal_types {
f("SlintInternal", LookupResult::Namespace(BuiltinNamespace::SlintInternal))
} else {
None
}
})
}
}
pub fn global_lookup() -> impl LookupObject {
(
ArgumentsLookup,
(
SpecialIdLookup,
(
IdLookup,
(
InScopeLookup,
(
LookupType,
(BuiltinNamespaceLookup, (ReturnTypeSpecificLookup, BuiltinFunctionLookup)),
),
),
),
),
)
}
impl LookupObject for Expression {
fn for_each_entry<R>(
&self,
ctx: &LookupCtx,
f: &mut impl FnMut(&SmolStr, LookupResult) -> Option<R>,
) -> Option<R> {
match self {
Expression::ElementReference(e) => e.upgrade().unwrap().for_each_entry(ctx, f),
_ => match self.ty() {
Type::Struct(s) => {
for name in s.fields.keys() {
if let Some(r) = f(
name,
Expression::StructFieldAccess {
base: Box::new(self.clone()),
name: name.clone(),
}
.into(),
) {
return Some(r);
}
}
None
}
Type::String => StringExpression(self).for_each_entry(ctx, f),
Type::Brush | Type::Color => ColorExpression(self).for_each_entry(ctx, f),
Type::Image => ImageExpression(self).for_each_entry(ctx, f),
Type::Array(_) => ArrayExpression(self).for_each_entry(ctx, f),
Type::Float32 | Type::Int32 | Type::Percent => {
NumberExpression(self).for_each_entry(ctx, f)
}
ty if ty.as_unit_product().is_some() => {
NumberWithUnitExpression(self).for_each_entry(ctx, f)
}
_ => None,
},
}
}
fn lookup(&self, ctx: &LookupCtx, name: &SmolStr) -> Option<LookupResult> {
match self {
Expression::ElementReference(e) => e.upgrade().unwrap().lookup(ctx, name),
_ => match self.ty() {
Type::Struct(s) => s.fields.contains_key(name).then(|| {
LookupResult::from(Expression::StructFieldAccess {
base: Box::new(self.clone()),
name: name.clone(),
})
}),
Type::String => StringExpression(self).lookup(ctx, name),
Type::Brush | Type::Color => ColorExpression(self).lookup(ctx, name),
Type::Image => ImageExpression(self).lookup(ctx, name),
Type::Array(_) => ArrayExpression(self).lookup(ctx, name),
Type::Float32 | Type::Int32 | Type::Percent => {
NumberExpression(self).lookup(ctx, name)
}
ty if ty.as_unit_product().is_some() => {
NumberWithUnitExpression(self).lookup(ctx, name)
}
_ => None,
},
}
}
}
struct StringExpression<'a>(&'a Expression);
impl LookupObject for StringExpression<'_> {
fn for_each_entry<R>(
&self,
ctx: &LookupCtx,
f: &mut impl FnMut(&SmolStr, LookupResult) -> Option<R>,
) -> Option<R> {
let member_function = |f: BuiltinFunction| {
LookupResult::Callable(LookupResultCallable::MemberFunction {
base: self.0.clone(),
base_node: ctx.current_token.clone(), // Note that this is not the base_node, but the function's node
member: LookupResultCallable::Callable(Callable::Builtin(f)).into(),
})
};
let function_call = |f: BuiltinFunction| {
LookupResult::from(Expression::FunctionCall {
function: Callable::Builtin(f),
source_location: ctx.current_token.as_ref().map(|t| t.to_source_location()),
arguments: vec![self.0.clone()],
})
};
let mut f = |s, res| f(&SmolStr::new_static(s), res);
None.or_else(|| f("is-float", member_function(BuiltinFunction::StringIsFloat)))
.or_else(|| f("to-float", member_function(BuiltinFunction::StringToFloat)))
.or_else(|| f("is-empty", function_call(BuiltinFunction::StringIsEmpty)))
.or_else(|| f("character-count", function_call(BuiltinFunction::StringCharacterCount)))
}
}
struct ColorExpression<'a>(&'a Expression);
impl LookupObject for ColorExpression<'_> {
fn for_each_entry<R>(
&self,
ctx: &LookupCtx,
f: &mut impl FnMut(&SmolStr, LookupResult) -> Option<R>,
) -> Option<R> {
let member_function = |f: BuiltinFunction| {
let base = if f == BuiltinFunction::ColorHsvaStruct && self.0.ty() == Type::Brush {
Expression::Cast { from: Box::new(self.0.clone()), to: Type::Color }
} else {
self.0.clone()
};
LookupResult::Callable(LookupResultCallable::MemberFunction {
base,
base_node: ctx.current_token.clone(), // Note that this is not the base_node, but the function's node
member: Box::new(LookupResultCallable::Callable(Callable::Builtin(f))),
})
};
let field_access = |f: &'static str| {
let base = if self.0.ty() == Type::Brush {
Expression::Cast { from: Box::new(self.0.clone()), to: Type::Color }
} else {
self.0.clone()
};
LookupResult::from(Expression::StructFieldAccess {
base: Box::new(Expression::FunctionCall {
function: BuiltinFunction::ColorRgbaStruct.into(),
source_location: ctx.current_token.as_ref().map(|t| t.to_source_location()),
arguments: vec![base],
}),
name: SmolStr::new_static(f),
})
};
let mut f = |s, res| f(&SmolStr::new_static(s), res);
None.or_else(|| f("red", field_access("red")))
.or_else(|| f("green", field_access("green")))
.or_else(|| f("blue", field_access("blue")))
.or_else(|| f("alpha", field_access("alpha")))
.or_else(|| f("to-hsv", member_function(BuiltinFunction::ColorHsvaStruct)))
.or_else(|| f("brighter", member_function(BuiltinFunction::ColorBrighter)))
.or_else(|| f("darker", member_function(BuiltinFunction::ColorDarker)))
.or_else(|| f("transparentize", member_function(BuiltinFunction::ColorTransparentize)))
.or_else(|| f("with-alpha", member_function(BuiltinFunction::ColorWithAlpha)))
.or_else(|| f("mix", member_function(BuiltinFunction::ColorMix)))
}
}
struct ImageExpression<'a>(&'a Expression);
impl LookupObject for ImageExpression<'_> {
fn for_each_entry<R>(
&self,
ctx: &LookupCtx,
f: &mut impl FnMut(&SmolStr, LookupResult) -> Option<R>,
) -> Option<R> {
let field_access = |f: &str| {
LookupResult::from(Expression::StructFieldAccess {
base: Box::new(Expression::FunctionCall {
function: BuiltinFunction::ImageSize.into(),
source_location: ctx.current_token.as_ref().map(|t| t.to_source_location()),
arguments: vec![self.0.clone()],
}),
name: f.into(),
})
};
let mut f = |s, res| f(&SmolStr::new_static(s), res);
None.or_else(|| f("width", field_access("width")))
.or_else(|| f("height", field_access("height")))
}
}
struct ArrayExpression<'a>(&'a Expression);
impl LookupObject for ArrayExpression<'_> {
fn for_each_entry<R>(
&self,
ctx: &LookupCtx,
f: &mut impl FnMut(&SmolStr, LookupResult) -> Option<R>,
) -> Option<R> {
let member_function = |f: BuiltinFunction| {
LookupResult::from(Expression::FunctionCall {
function: Callable::Builtin(f),
source_location: ctx.current_token.as_ref().map(|t| t.to_source_location()),
arguments: vec![self.0.clone()],
})
};
None.or_else(|| {
f(&SmolStr::new_static("length"), member_function(BuiltinFunction::ArrayLength))
})
}
}
/// An expression of type int or float
struct NumberExpression<'a>(&'a Expression);
impl LookupObject for NumberExpression<'_> {
fn for_each_entry<R>(
&self,
ctx: &LookupCtx,
f: &mut impl FnMut(&SmolStr, LookupResult) -> Option<R>,
) -> Option<R> {
let member_function = |f: BuiltinFunction| {
LookupResult::Callable(LookupResultCallable::MemberFunction {
base: self.0.clone(),
base_node: ctx.current_token.clone(), // Note that this is not the base_node, but the function's node
member: LookupResultCallable::Callable(Callable::Builtin(f)).into(),
})
};
let mut f2 = |s, res| f(&SmolStr::new_static(s), res);
None.or_else(|| f2("round", member_function(BuiltinFunction::Round)))
.or_else(|| f2("ceil", member_function(BuiltinFunction::Ceil)))
.or_else(|| f2("floor", member_function(BuiltinFunction::Floor)))
.or_else(|| f2("sqrt", member_function(BuiltinFunction::Sqrt)))
.or_else(|| f2("asin", member_function(BuiltinFunction::ASin)))
.or_else(|| f2("acos", member_function(BuiltinFunction::ACos)))
.or_else(|| f2("atan", member_function(BuiltinFunction::ATan)))
.or_else(|| f2("log", member_function(BuiltinFunction::Log)))
.or_else(|| f2("pow", member_function(BuiltinFunction::Pow)))
.or_else(|| NumberWithUnitExpression(self.0).for_each_entry(ctx, f))
}
}
/// An expression of any numerical value with an unit
struct NumberWithUnitExpression<'a>(&'a Expression);
impl LookupObject for NumberWithUnitExpression<'_> {
fn for_each_entry<R>(
&self,
ctx: &LookupCtx,
f: &mut impl FnMut(&SmolStr, LookupResult) -> Option<R>,
) -> Option<R> {
let member_macro = |f: BuiltinMacroFunction| {
LookupResult::Callable(LookupResultCallable::MemberFunction {
base: self.0.clone(),
base_node: ctx.current_token.clone(), // Note that this is not the base_node, but the function's node
member: Box::new(LookupResultCallable::Macro(f)),
})
};
let mut f = |s, res| f(&SmolStr::new_static(s), res);
None.or_else(|| f("mod", member_macro(BuiltinMacroFunction::Mod)))
.or_else(|| f("clamp", member_macro(BuiltinMacroFunction::Clamp)))
.or_else(|| f("abs", member_macro(BuiltinMacroFunction::Abs)))
.or_else(|| f("max", member_macro(BuiltinMacroFunction::Max)))
.or_else(|| f("min", member_macro(BuiltinMacroFunction::Min)))
.or_else(|| {
if self.0.ty() != Type::Angle {
return None;
}
let member_function = |f: BuiltinFunction| {
LookupResult::Callable(LookupResultCallable::MemberFunction {
base: self.0.clone(),
base_node: ctx.current_token.clone(), // Note that this is not the base_node, but the function's node
member: Box::new(LookupResultCallable::Callable(Callable::Builtin(f))),
})
};
None.or_else(|| f("sin", member_function(BuiltinFunction::Sin)))
.or_else(|| f("cos", member_function(BuiltinFunction::Cos)))
.or_else(|| f("tan", member_function(BuiltinFunction::Tan)))
})
}
}
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