No more collisions between syntax::Tree and layout::Tree

13 files changed, 69 insertions, 66 deletions

diff --git a/bench/src/bench.rs b/bench/src/bench.rs
index c86ccc89..129215fe 100644
--- a/bench/src/bench.rs
+++ b/bench/src/bench.rs
@@ -8,10 +8,10 @@ use typst::cache::Cache;
 use typst::eval::{eval, Module, Scope};
 use typst::exec::{exec, State};
 use typst::export::pdf;
-use typst::layout::{self, layout, Frame};
+use typst::layout::{layout, Frame, LayoutTree};
 use typst::loading::FsLoader;
 use typst::parse::parse;
-use typst::syntax;
+use typst::syntax::SyntaxTree;
 use typst::typeset;
 
 const FONT_DIR: &str = "../fonts";
@@ -26,7 +26,6 @@ fn benchmarks(c: &mut Criterion) {
         let src = std::fs::read_to_string(&path).unwrap();
         let case = Case::new(src, ctx.clone());
 
-        /// Bench with all caches.
         macro_rules! bench {
             ($step:literal, setup = |$cache:ident| $setup:expr, code = $code:expr $(,)?) => {
                 c.bench_function(&format!("{}-{}", $step, name), |b| {
@@ -97,9 +96,9 @@ struct Case {
     src: String,
     scope: Scope,
     state: State,
-    ast: Rc<syntax::Tree>,
+    ast: Rc<SyntaxTree>,
     module: Module,
-    tree: layout::Tree,
+    tree: LayoutTree,
     frames: Vec<Rc<Frame>>,
 }
 
@@ -111,7 +110,7 @@ impl Case {
         let state = typst::exec::State::default();
         let src = src.into();
         let ast = Rc::new(parse(&src).output);
-        let module = eval(loader, cache, None, ast.clone(), &scope).output;
+        let module = eval(loader, cache, None, Rc::clone(&ast), &scope).output;
         let tree = exec(&module.template, state.clone()).output;
         let frames = layout(loader, cache, &tree);
         drop(borrowed);
@@ -127,17 +126,17 @@ impl Case {
         }
     }
 
-    fn parse(&self) -> syntax::Tree {
+    fn parse(&self) -> SyntaxTree {
         parse(&self.src).output
     }
 
     fn eval(&self) -> Module {
         let mut borrowed = self.ctx.borrow_mut();
         let Context { loader, cache } = &mut *borrowed;
-        eval(loader, cache, None, self.ast.clone(), &self.scope).output
+        eval(loader, cache, None, Rc::clone(&self.ast), &self.scope).output
     }
 
-    fn exec(&self) -> layout::Tree {
+    fn exec(&self) -> LayoutTree {
         exec(&self.module.template, self.state.clone()).output
     }
 
diff --git a/src/eval/mod.rs b/src/eval/mod.rs
index a9fff56b..8579025f 100644
--- a/src/eval/mod.rs
+++ b/src/eval/mod.rs
@@ -30,11 +30,11 @@ pub fn eval(
     loader: &mut dyn Loader,
     cache: &mut Cache,
     path: Option<&Path>,
-    tree: Rc<Tree>,
+    ast: Rc<SyntaxTree>,
     scope: &Scope,
 ) -> Pass<Module> {
     let mut ctx = EvalContext::new(loader, cache, path, scope);
-    let template = tree.eval(&mut ctx);
+    let template = ast.eval(&mut ctx);
     let module = Module { scope: ctx.scopes.top, template };
     Pass::new(module, ctx.diags)
 }
@@ -148,8 +148,8 @@ impl<'a> EvalContext<'a> {
         self.route.push(hash);
 
         // Evaluate the module.
-        let tree = Rc::new(parsed.output);
-        let template = tree.eval(self);
+        let ast = Rc::new(parsed.output);
+        let template = ast.eval(self);
 
         // Restore the old context.
         let new_scopes = mem::replace(&mut self.scopes, old_scopes);
@@ -212,7 +212,7 @@ pub trait Eval {
     fn eval(&self, ctx: &mut EvalContext) -> Self::Output;
 }
 
-impl Eval for Rc<Tree> {
+impl Eval for Rc<SyntaxTree> {
     type Output = TemplateValue;
 
     fn eval(&self, ctx: &mut EvalContext) -> Self::Output {
diff --git a/src/eval/value.rs b/src/eval/value.rs
index 0da2a5be..472df0ea 100644
--- a/src/eval/value.rs
+++ b/src/eval/value.rs
@@ -10,7 +10,7 @@ use super::EvalContext;
 use crate::color::{Color, RgbaColor};
 use crate::exec::ExecContext;
 use crate::geom::{Angle, Fractional, Length, Linear, Relative};
-use crate::syntax::{Expr, Span, Spanned, Tree};
+use crate::syntax::{Expr, Span, Spanned, SyntaxTree};
 
 /// A computational value.
 #[derive(Debug, Clone, PartialEq)]
@@ -165,8 +165,8 @@ pub enum TemplateNode {
     /// expression.
     Tree {
         /// The syntax tree of the corresponding template expression.
-        tree: Rc<Tree>,
-        /// The evaluated expressions for the `tree`.
+        tree: Rc<SyntaxTree>,
+        /// The evaluated expressions in the syntax tree.
         map: ExprMap,
     },
     /// A template that was converted from a string.
@@ -184,10 +184,10 @@ impl PartialEq for TemplateNode {
 
 /// A map from expressions to the values they evaluated to.
 ///
-/// The raw pointers point into the expressions contained in some [`Tree`].
-/// Since the lifetime is erased, the tree could go out of scope while the hash
-/// map still lives. Although this could lead to lookup panics, it is not unsafe
-/// since the pointers are never dereferenced.
+/// The raw pointers point into the expressions contained in some
+/// [`SyntaxTree`]. Since the lifetime is erased, the tree could go out of scope
+/// while the hash map still lives. Although this could lead to lookup panics,
+/// it is not unsafe since the pointers are never dereferenced.
 pub type ExprMap = HashMap<*const Expr, Value>;
 
 /// A reference-counted dynamic template node that can implement custom
diff --git a/src/exec/context.rs b/src/exec/context.rs
index 3994fdb9..0f6d47f5 100644
--- a/src/exec/context.rs
+++ b/src/exec/context.rs
@@ -6,9 +6,9 @@ use crate::diag::{Diag, DiagSet, Pass};
 use crate::eval::{ExprMap, TemplateValue};
 use crate::geom::{Align, Dir, Gen, GenAxis, Length, Linear, Sides, Size};
 use crate::layout::{
-    AnyNode, PadNode, PageRun, ParChild, ParNode, StackChild, StackNode, Tree,
+    AnyNode, LayoutTree, PadNode, PageRun, ParChild, ParNode, StackChild, StackNode,
 };
-use crate::syntax::{self, Span};
+use crate::syntax::{Span, SyntaxTree};
 
 /// The context for execution.
 pub struct ExecContext {
@@ -17,7 +17,7 @@ pub struct ExecContext {
     /// Execution diagnostics.
     pub diags: DiagSet,
     /// The tree of finished page runs.
-    tree: Tree,
+    tree: LayoutTree,
     /// When we are building the top-level stack, this contains metrics of the
     /// page. While building a group stack through `exec_group`, this is `None`.
     page: Option<PageBuilder>,
@@ -30,7 +30,7 @@ impl ExecContext {
     pub fn new(state: State) -> Self {
         Self {
             diags: DiagSet::new(),
-            tree: Tree { runs: vec![] },
+            tree: LayoutTree { runs: vec![] },
             page: Some(PageBuilder::new(&state, true)),
             stack: StackBuilder::new(&state),
             state,
@@ -56,8 +56,8 @@ impl ExecContext {
         self.exec_stack(|ctx| template.exec(ctx))
     }
 
-    /// Execute a tree with a map and return the result as a stack node.
-    pub fn exec_tree_stack(&mut self, tree: &syntax::Tree, map: &ExprMap) -> StackNode {
+    /// Execute a syntax tree with a map and return the result as a stack node.
+    pub fn exec_tree_stack(&mut self, tree: &SyntaxTree, map: &ExprMap) -> StackNode {
         self.exec_stack(|ctx| tree.exec_with_map(ctx, map))
     }
 
@@ -137,7 +137,7 @@ impl ExecContext {
     }
 
     /// Finish execution and return the created layout tree.
-    pub fn finish(mut self) -> Pass<Tree> {
+    pub fn finish(mut self) -> Pass<LayoutTree> {
         assert!(self.page.is_some());
         self.pagebreak(true, false, Span::default());
         Pass::new(self.tree, self.diags)
diff --git a/src/exec/mod.rs b/src/exec/mod.rs
index 882f1d0b..8e369d12 100644
--- a/src/exec/mod.rs
+++ b/src/exec/mod.rs
@@ -11,12 +11,12 @@ use std::rc::Rc;
 use crate::diag::Pass;
 use crate::eval::{ExprMap, TemplateFunc, TemplateNode, TemplateValue, Value};
 use crate::geom::{Dir, Gen};
-use crate::layout::{self, StackChild, StackNode};
+use crate::layout::{LayoutTree, StackChild, StackNode};
 use crate::pretty::pretty;
-use crate::syntax;
+use crate::syntax::*;
 
 /// Execute a template to produce a layout tree.
-pub fn exec(template: &TemplateValue, state: State) -> Pass<layout::Tree> {
+pub fn exec(template: &TemplateValue, state: State) -> Pass<LayoutTree> {
     let mut ctx = ExecContext::new(state);
     template.exec(&mut ctx);
     ctx.finish()
@@ -40,7 +40,7 @@ pub trait ExecWithMap {
     fn exec_with_map(&self, ctx: &mut ExecContext, map: &ExprMap);
 }
 
-impl ExecWithMap for syntax::Tree {
+impl ExecWithMap for SyntaxTree {
     fn exec_with_map(&self, ctx: &mut ExecContext, map: &ExprMap) {
         for node in self {
             node.exec_with_map(ctx, map);
@@ -48,7 +48,7 @@ impl ExecWithMap for syntax::Tree {
     }
 }
 
-impl ExecWithMap for syntax::Node {
+impl ExecWithMap for Node {
     fn exec_with_map(&self, ctx: &mut ExecContext, map: &ExprMap) {
         match self {
             Self::Text(text) => ctx.push_text(text),
@@ -66,7 +66,7 @@ impl ExecWithMap for syntax::Node {
     }
 }
 
-impl Exec for syntax::RawNode {
+impl Exec for RawNode {
     fn exec(&self, ctx: &mut ExecContext) {
         if self.block {
             ctx.parbreak();
@@ -83,7 +83,7 @@ impl Exec for syntax::RawNode {
     }
 }
 
-impl ExecWithMap for syntax::HeadingNode {
+impl ExecWithMap for HeadingNode {
     fn exec_with_map(&self, ctx: &mut ExecContext, map: &ExprMap) {
         ctx.parbreak();
 
@@ -100,20 +100,20 @@ impl ExecWithMap for syntax::HeadingNode {
     }
 }
 
-impl ExecWithMap for syntax::ListItem {
+impl ExecWithMap for ListItem {
     fn exec_with_map(&self, ctx: &mut ExecContext, map: &ExprMap) {
         exec_item(ctx, "•".to_string(), &self.body, map);
     }
 }
 
-impl ExecWithMap for syntax::EnumItem {
+impl ExecWithMap for EnumItem {
     fn exec_with_map(&self, ctx: &mut ExecContext, map: &ExprMap) {
         let label = self.number.unwrap_or(1).to_string() + ".";
         exec_item(ctx, label, &self.body, map);
     }
 }
 
-fn exec_item(ctx: &mut ExecContext, label: String, body: &syntax::Tree, map: &ExprMap) {
+fn exec_item(ctx: &mut ExecContext, label: String, body: &SyntaxTree, map: &ExprMap) {
     let label = ctx.exec_stack(|ctx| ctx.push_text(label));
     let body = ctx.exec_tree_stack(body, map);
     let stack = StackNode {
diff --git a/src/layout/mod.rs b/src/layout/mod.rs
index 7ba556a1..e8bdab62 100644
--- a/src/layout/mod.rs
+++ b/src/layout/mod.rs
@@ -37,7 +37,11 @@ use crate::geom::*;
 use crate::loading::Loader;
 
 /// Layout a tree into a collection of frames.
-pub fn layout(loader: &mut dyn Loader, cache: &mut Cache, tree: &Tree) -> Vec<Rc<Frame>> {
+pub fn layout(
+    loader: &mut dyn Loader,
+    cache: &mut Cache,
+    tree: &LayoutTree,
+) -> Vec<Rc<Frame>> {
     tree.layout(&mut LayoutContext {
         loader,
         cache,
@@ -48,12 +52,12 @@ pub fn layout(loader: &mut dyn Loader, cache: &mut Cache, tree: &Tree) -> Vec<Rc
 
 /// A tree of layout nodes.
 #[derive(Debug, Clone, PartialEq)]
-pub struct Tree {
+pub struct LayoutTree {
     /// Runs of pages with the same properties.
     pub runs: Vec<PageRun>,
 }
 
-impl Tree {
+impl LayoutTree {
     /// Layout the tree into a collection of frames.
     pub fn layout(&self, ctx: &mut LayoutContext) -> Vec<Rc<Frame>> {
         self.runs.iter().flat_map(|run| run.layout(ctx)).collect()
diff --git a/src/lib.rs b/src/lib.rs
index 053888f4..f083163b 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -20,11 +20,11 @@
 //!
 //! [tokens]: parse::Tokens
 //! [parsed]: parse::parse
-//! [syntax tree]: syntax::Tree
+//! [syntax tree]: syntax::SyntaxTree
 //! [evaluate]: eval::eval
 //! [module]: eval::Module
 //! [execute]: exec::exec
-//! [layout tree]: layout::Tree
+//! [layout tree]: layout::LayoutTree
 //! [layouted]: layout::layout
 //! [PDF]: export::pdf
 
@@ -84,14 +84,14 @@ pub fn typeset(
     scope: &Scope,
     state: State,
 ) -> Pass<Vec<Rc<Frame>>> {
-    let parsed = parse::parse(src);
-    let evaluated = eval::eval(loader, cache, path, Rc::new(parsed.output), scope);
-    let executed = exec::exec(&evaluated.output.template, state);
-    let layouted = layout::layout(loader, cache, &executed.output);
+    let ast = parse::parse(src);
+    let module = eval::eval(loader, cache, path, Rc::new(ast.output), scope);
+    let tree = exec::exec(&module.output.template, state);
+    let frames = layout::layout(loader, cache, &tree.output);
 
-    let mut diags = parsed.diags;
-    diags.extend(evaluated.diags);
-    diags.extend(executed.diags);
+    let mut diags = ast.diags;
+    diags.extend(module.diags);
+    diags.extend(tree.diags);
 
-    Pass::new(layouted, diags)
+    Pass::new(frames, diags)
 }
diff --git a/src/parse/mod.rs b/src/parse/mod.rs
index e8e16803..0afcd88b 100644
--- a/src/parse/mod.rs
+++ b/src/parse/mod.rs
@@ -19,19 +19,19 @@ use crate::syntax::visit::{mutable::visit_expr, VisitMut};
 use crate::syntax::*;
 
 /// Parse a string of source code.
-pub fn parse(src: &str) -> Pass<Tree> {
+pub fn parse(src: &str) -> Pass<SyntaxTree> {
     let mut p = Parser::new(src);
     Pass::new(tree(&mut p), p.diags)
 }
 
 /// Parse a syntax tree.
-fn tree(p: &mut Parser) -> Tree {
+fn tree(p: &mut Parser) -> SyntaxTree {
     tree_while(p, true, &mut |_| true)
 }
 
 /// Parse a syntax tree that stays right of the column at the start of the next
 /// non-whitespace token.
-fn tree_indented(p: &mut Parser) -> Tree {
+fn tree_indented(p: &mut Parser) -> SyntaxTree {
     p.eat_while(|t| match t {
         Token::Space(n) => n == 0,
         Token::LineComment(_) | Token::BlockComment(_) => true,
@@ -46,7 +46,7 @@ fn tree_indented(p: &mut Parser) -> Tree {
 }
 
 /// Parse a syntax tree.
-fn tree_while<F>(p: &mut Parser, mut at_start: bool, f: &mut F) -> Tree
+fn tree_while<F>(p: &mut Parser, mut at_start: bool, f: &mut F) -> SyntaxTree
 where
     F: FnMut(&mut Parser) -> bool,
 {
@@ -72,7 +72,7 @@ where
                         tree_while(self.p, true, self.f)
                     } else {
                         self.p.diag(error!(call.callee.span(), "duplicate wide call"));
-                        Tree::default()
+                        SyntaxTree::default()
                     };
 
                     call.args.items.push(CallArg::Pos(Expr::Template(TemplateExpr {
diff --git a/src/pretty.rs b/src/pretty.rs
index 216a6370..ccf4d88d 100644
--- a/src/pretty.rs
+++ b/src/pretty.rs
@@ -78,7 +78,7 @@ impl Write for Printer {
     }
 }
 
-impl Pretty for Tree {
+impl Pretty for SyntaxTree {
     fn pretty(&self, p: &mut Printer) {
         for node in self {
             node.pretty(p);
@@ -630,10 +630,10 @@ mod tests {
 
     #[track_caller]
     fn test_parse(src: &str, exp: &str) {
-        let tree = parse(src).output;
-        let found = pretty(&tree);
+        let ast = parse(src).output;
+        let found = pretty(&ast);
         if exp != found {
-            println!("tree:     {:#?}", tree);
+            println!("tree:     {:#?}", ast);
             println!("expected: {}", exp);
             println!("found:    {}", found);
             panic!("test failed");
diff --git a/src/syntax/expr.rs b/src/syntax/expr.rs
index aabff1ea..26ec7f48 100644
--- a/src/syntax/expr.rs
+++ b/src/syntax/expr.rs
@@ -158,7 +158,7 @@ pub struct TemplateExpr {
     /// The source code location.
     pub span: Span,
     /// The contents of the template.
-    pub tree: Rc<Tree>,
+    pub tree: Rc<SyntaxTree>,
 }
 
 /// A grouped expression: `(1 + 2)`.
diff --git a/src/syntax/mod.rs b/src/syntax/mod.rs
index 9426090c..6673fda6 100644
--- a/src/syntax/mod.rs
+++ b/src/syntax/mod.rs
@@ -16,4 +16,4 @@ pub use token::*;
 /// The abstract syntax tree.
 ///
 /// This type can represent a full parsed document.
-pub type Tree = Vec<Node>;
+pub type SyntaxTree = Vec<Node>;
diff --git a/src/syntax/node.rs b/src/syntax/node.rs
index 79b1e352..1fbdb3d8 100644
--- a/src/syntax/node.rs
+++ b/src/syntax/node.rs
@@ -52,7 +52,7 @@ pub struct HeadingNode {
     /// The section depth (numer of equals signs).
     pub level: usize,
     /// The contents of the heading.
-    pub body: Rc<Tree>,
+    pub body: Rc<SyntaxTree>,
 }
 
 /// An item in an unordered list: `- ...`.
@@ -61,7 +61,7 @@ pub struct ListItem {
     /// The source code location.
     pub span: Span,
     /// The contents of the list item.
-    pub body: Tree,
+    pub body: SyntaxTree,
 }
 
 /// An item in an enumeration (ordered list): `1. ...`.
@@ -72,5 +72,5 @@ pub struct EnumItem {
     /// The number, if any.
     pub number: Option<usize>,
     /// The contents of the list item.
-    pub body: Tree,
+    pub body: SyntaxTree,
 }
diff --git a/src/syntax/visit.rs b/src/syntax/visit.rs
index 657b379a..66c5f979 100644
--- a/src/syntax/visit.rs
+++ b/src/syntax/visit.rs
@@ -79,7 +79,7 @@ macro_rules! impl_visitor {
 }
 
 impl_visitors! {
-    visit_tree(v, tree: Tree) {
+    visit_tree(v, tree: SyntaxTree) {
         for node in tree {
             v.visit_node(node);
         }