From e5711929e338fa5fc5c628711c0ee10c5317c1d8 Mon Sep 17 00:00:00 2001
From: Chris Wong <lambda.fairy@gmail.com>
Date: Sat, 11 Apr 2015 10:19:28 +1200
Subject: [PATCH] print-expansion for all your expansion printing needs
---
.travis.yml | 2 +-
maud_macros/Cargo.toml | 3 +++
maud_macros/src/lib.rs | 7 ++++++-
3 files changed, 10 insertions(+), 2 deletions(-)
diff --git a/.travis.yml b/.travis.yml
index b67e5f7..73a0e4b 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,3 +1,3 @@
language: rust
script:
- - ( cd maud_macros && cargo test --verbose )
+ - ( cd maud_macros && cargo test --features print-expansion --verbose )
diff --git a/maud_macros/Cargo.toml b/maud_macros/Cargo.toml
index 6729b4d..99769df 100644
--- a/maud_macros/Cargo.toml
+++ b/maud_macros/Cargo.toml
@@ -12,6 +12,9 @@ description = """
Compile-time HTML templates.
"""
+[features]
+print-expansion = []
+
[dependencies.maud]
path = "../maud"
version = "=0.3.4"
diff --git a/maud_macros/src/lib.rs b/maud_macros/src/lib.rs
index beb9243..49ecf90 100644
--- a/maud_macros/src/lib.rs
+++ b/maud_macros/src/lib.rs
@@ -10,13 +10,18 @@ extern crate maud;
use syntax::ast::TokenTree;
use syntax::codemap::Span;
use syntax::ext::base::{ExtCtxt, MacEager, MacResult};
+use syntax::print::pprust;
use rustc::plugin::Registry;
mod parse;
mod render;
fn expand_html<'cx>(cx: &'cx mut ExtCtxt, sp: Span, args: &[TokenTree]) -> Box<MacResult + 'cx> {
- MacEager::expr(parse::parse(cx, args, sp))
+ let expr = parse::parse(cx, args, sp);
+ if cfg!(feature = "print-expansion") {
+ println!("{}", pprust::expr_to_string(&expr));
+ }
+ MacEager::expr(expr)
}
#[plugin_registrar]