1 files changed, 48 insertions, 0 deletions
diff --git a/compiler/rustc_ast_pretty/src/helpers.rs b/compiler/rustc_ast_pretty/src/helpers.rs
new file mode 100644
index 000000000..5ec71cddf
--- /dev/null
+++ b/compiler/rustc_ast_pretty/src/helpers.rs
@@ -0,0 +1,48 @@
+use crate::pp::Printer;
+use std::borrow::Cow;
+
+impl Printer {
+    pub fn word_space<W: Into<Cow<'static, str>>>(&mut self, w: W) {
+        self.word(w);
+        self.space();
+    }
+
+    pub fn popen(&mut self) {
+        self.word("(");
+    }
+
+    pub fn pclose(&mut self) {
+        self.word(")");
+    }
+
+    pub fn hardbreak_if_not_bol(&mut self) {
+        if !self.is_beginning_of_line() {
+            self.hardbreak()
+        }
+    }
+
+    pub fn space_if_not_bol(&mut self) {
+        if !self.is_beginning_of_line() {
+            self.space();
+        }
+    }
+
+    pub fn nbsp(&mut self) {
+        self.word(" ")
+    }
+
+    pub fn word_nbsp<S: Into<Cow<'static, str>>>(&mut self, w: S) {
+        self.word(w);
+        self.nbsp()
+    }
+
+    // Synthesizes a comment that was not textually present in the original
+    // source file.
+    pub fn synth_comment(&mut self, text: impl Into<Cow<'static, str>>) {
+        self.word("/*");
+        self.space();
+        self.word(text);
+        self.space();
+        self.word("*/")
+    }
+}