Eco string 🌱

2 files changed, 15 insertions, 5 deletions

diff --git a/src/exec/context.rs b/src/exec/context.rs
index 0f6d47f5..4764a808 100644
--- a/src/exec/context.rs
+++ b/src/exec/context.rs
@@ -3,6 +3,7 @@ use std::rc::Rc;
 
 use super::{Exec, ExecWithMap, FontFamily, State};
 use crate::diag::{Diag, DiagSet, Pass};
+use crate::eco::EcoString;
 use crate::eval::{ExprMap, TemplateValue};
 use crate::geom::{Align, Dir, Gen, GenAxis, Length, Linear, Sides, Size};
 use crate::layout::{
@@ -77,7 +78,7 @@ impl ExecContext {
     /// Push text into the active paragraph.
     ///
     /// The text is split into lines at newlines.
-    pub fn push_text(&mut self, text: impl Into<String>) {
+    pub fn push_text(&mut self, text: impl Into<EcoString>) {
         self.stack.par.push(self.make_text_node(text));
     }
 
@@ -143,7 +144,7 @@ impl ExecContext {
         Pass::new(self.tree, self.diags)
     }
 
-    fn make_text_node(&self, text: impl Into<String>) -> ParChild {
+    fn make_text_node(&self, text: impl Into<EcoString>) -> ParChild {
         ParChild::Text(
             text.into(),
             self.state.aligns.cross,
diff --git a/src/exec/mod.rs b/src/exec/mod.rs
index fc829676..2a145fbc 100644
--- a/src/exec/mod.rs
+++ b/src/exec/mod.rs
@@ -6,6 +6,7 @@ mod state;
 pub use context::*;
 pub use state::*;
 
+use std::fmt::Write;
 use std::rc::Rc;
 
 use crate::diag::Pass;
@@ -13,6 +14,7 @@ use crate::eval::{ExprMap, TemplateFunc, TemplateNode, TemplateValue, Value};
 use crate::geom::{Dir, Gen};
 use crate::layout::{LayoutTree, StackChild, StackNode};
 use crate::pretty::pretty;
+use crate::eco::EcoString;
 use crate::syntax::*;
 
 /// Execute a template to produce a layout tree.
@@ -102,18 +104,25 @@ impl ExecWithMap for HeadingNode {
 
 impl ExecWithMap for ListItem {
     fn exec_with_map(&self, ctx: &mut ExecContext, map: &ExprMap) {
-        exec_item(ctx, "•".to_string(), &self.body, map);
+        exec_item(ctx, '•'.into(), &self.body, map);
     }
 }
 
 impl ExecWithMap for EnumItem {
     fn exec_with_map(&self, ctx: &mut ExecContext, map: &ExprMap) {
-        let label = self.number.unwrap_or(1).to_string() + ".";
+        let mut label = EcoString::new();
+        write!(&mut label, "{}", self.number.unwrap_or(1)).unwrap();
+        label.push('.');
         exec_item(ctx, label, &self.body, map);
     }
 }
 
-fn exec_item(ctx: &mut ExecContext, label: String, body: &SyntaxTree, map: &ExprMap) {
+fn exec_item(
+    ctx: &mut ExecContext,
+    label: EcoString,
+    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 {