Add testcase.

Author: kevina

src/test/run-pass/qquote.rs

@@ -0,0 +1,87 @@
+// xfail-pretty
+
+use std;
+use rustc;
+
+import rustc::*;
+import std::io::*;
+
+import rustc::driver::diagnostic;
+import rustc::syntax::ast;
+import rustc::syntax::codemap;
+import rustc::syntax::parse::parser;
+import rustc::syntax::print::*;
+
+fn new_parse_sess() -> parser::parse_sess {
+    let cm = codemap::new_codemap();
+    let handler = diagnostic::mk_handler(option::none);
+    let sess = @{
+        cm: cm,
+        mutable next_id: 1,
+        span_diagnostic: diagnostic::mk_span_handler(handler, cm),
+        mutable chpos: 0u,
+        mutable byte_pos: 0u
+    };
+    ret sess;
+}
+
+iface fake_ext_ctxt {
+    fn session() -> fake_session;
+}
+
+type fake_options = {cfg: ast::crate_cfg};
+
+type fake_session = {opts: @fake_options,
+                     parse_sess: parser::parse_sess};
+
+impl of fake_ext_ctxt for fake_session {
+    fn session() -> fake_session {self}
+}
+
+fn mk_ctxt() -> fake_ext_ctxt {
+    let opts : fake_options = {cfg: []};
+    {opts: @opts, parse_sess: new_parse_sess()} as fake_ext_ctxt
+}
+
+
+fn main() {
+    let ext_cx = mk_ctxt();
+
+    let abc = #ast{23};
+    check_pp(abc,  pprust::print_expr, "23");
+
+    let expr = #ast{1 - $0 + 8};
+    check_pp(expr,  pprust::print_expr, "1 - $0 + 8");
+
+    let expr2 = rustc::syntax::ext::qquote::replace(expr, [abc]);
+    check_pp(expr2,  pprust::print_expr, "1 - 23 + 8");
+
+    let expr3 = #ast{2 - $(abc) + 7};
+    check_pp(expr3,  pprust::print_expr, "2 - 23 + 7");
+
+    let expr4 = #ast{2 - $(#(3)) + 9};
+    check_pp(expr4,  pprust::print_expr, "2 - 3 + 9");
+
+    let ty = #ast(ty){option<int>};
+    check_pp(ty, pprust::print_type, "option<int>");
+
+    let item = #ast(item){const x : int = 10;};
+    check_pp(item, pprust::print_item, "const x: int = 10;");
+
+    let stmt = #ast(stmt){let x = 20;};
+    check_pp(*stmt, pprust::print_stmt, "let x = 20;");
+
+    let pat = #ast(pat){some(_)};
+    check_pp(pat, pprust::print_pat, "some(_)");
+}
+
+fn check_pp<T>(expr: T, f: fn(pprust::ps, T), expect: str) {
+    let buf = mk_mem_buffer();
+    let pp = pprust::rust_printer(buf as std::io::writer);
+    f(pp, expr);
+    pp::eof(pp.s);
+    let str = mem_buffer_str(buf);
+    stdout().write_line(str);
+    if expect != "" {assert str == expect;}
+}
+