rustdoc: Enable various useful markdown extensions

Author: alexcrichton

src/librustdoc/html/markdown.rs

@@ -18,6 +18,14 @@ use std::vec;
 pub struct Markdown<'self>(&'self str);
 
 static OUTPUT_UNIT: libc::size_t = 64;
+static MKDEXT_NO_INTRA_EMPHASIS: libc::c_uint = 1 << 0;
+static MKDEXT_TABLES: libc::c_uint = 1 << 1;
+static MKDEXT_FENCED_CODE: libc::c_uint = 1 << 2;
+static MKDEXT_AUTOLINK: libc::c_uint = 1 << 3;
+static MKDEXT_STRIKETHROUGH: libc::c_uint = 1 << 4;
+static MKDEXT_SPACE_HEADERS: libc::c_uint = 1 << 6;
+static MKDEXT_SUPERSCRIPT: libc::c_uint = 1 << 7;
+static MKDEXT_LAX_SPACING: libc::c_uint = 1 << 8;
 
 type sd_markdown = libc::c_void;  // this is opaque to us
 
@@ -67,6 +75,9 @@ fn render(w: &mut io::Writer, s: &str) {
     // This code is all lifted from examples/sundown.c in the sundown repo
     unsafe {
         let ob = bufnew(OUTPUT_UNIT);
+        let extensions = MKDEXT_NO_INTRA_EMPHASIS | MKDEXT_TABLES |
+                         MKDEXT_FENCED_CODE | MKDEXT_AUTOLINK |
+                         MKDEXT_STRIKETHROUGH;
         let options = html_renderopt {
             toc_data: html_toc_data {
                 header_count: 0,
@@ -79,7 +90,7 @@ fn render(w: &mut io::Writer, s: &str) {
         let callbacks: sd_callbacks = [0, ..26];
 
         sdhtml_renderer(&callbacks, &options, 0);
-        let markdown = sd_markdown_new(0, 16, &callbacks,
+        let markdown = sd_markdown_new(extensions, 16, &callbacks,
                                        &options as *html_renderopt as *libc::c_void);
 
         do s.as_imm_buf |data, len| {