From 650c712eabc6f665a0a0cc2a47fb5b90cf715d87 Mon Sep 17 00:00:00 2001
From: Laurenz <laurmaedje@gmail.com>
Date: Fri, 14 Aug 2020 20:19:50 +0200
Subject: [PATCH] =?UTF-8?q?Add=20a=20syntax=20tree=20expression=20kind=20?=
 =?UTF-8?q?=F0=9F=8E=8D?=
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This allows bodies to be passed as regular arguments.
---
 src/syntax/expr.rs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/syntax/expr.rs b/src/syntax/expr.rs
index dd23ea610..e7e262bc0 100644
--- a/src/syntax/expr.rs
+++ b/src/syntax/expr.rs
@@ -9,6 +9,7 @@ use crate::length::Length;
 use crate::Feedback;
 use super::span::{SpanVec, Spanned};
 use super::tokens::is_identifier;
+use super::tree::SyntaxTree;
 use super::value::Value;
 
 /// An expression.
@@ -26,6 +27,8 @@ pub enum Expr {
     Length(Length),
     /// A color value with alpha channel: `#f79143ff`.
     Color(RgbaColor),
+    /// A syntax tree containing typesetting content.
+    Tree(SyntaxTree),
     /// A tuple: `(false, 12cm, "hi")`.
     Tuple(Tuple),
     /// A named tuple: `cmyk(37.7, 0, 3.9, 1.1)`.
@@ -56,6 +59,7 @@ impl Expr {
             Number(_)     => "number",
             Length(_)     => "length",
             Color(_)      => "color",
+            Tree(_)       => "syntax tree",
             Tuple(_)      => "tuple",
             NamedTuple(_) => "named tuple",
             Object(_)     => "object",
@@ -78,6 +82,7 @@ impl Debug for Expr {
             Number(n) => n.fmt(f),
             Length(s) => s.fmt(f),
             Color(c) => c.fmt(f),
+            Tree(t) => t.fmt(f),
             Tuple(t) => t.fmt(f),
             NamedTuple(t) => t.fmt(f),
             Object(o) => o.fmt(f),