Add compile-file/macro-backtrace-{invalid-internals,nested,println} tests

Author: rprichard

src/test/compile-fail/macro-backtrace-invalid-internals.rs

@@ -0,0 +1,57 @@
+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// Macros in statement vs expression position handle backtraces differently.
+
+macro_rules! fake_method_stmt { //~ NOTE in expansion of
+     () => {
+          1.fake() //~ ERROR does not implement any method
+     }
+}
+
+macro_rules! fake_field_stmt { //~ NOTE in expansion of
+     () => {
+          1.fake //~ ERROR no field with that name
+     }
+}
+
+macro_rules! fake_anon_field_stmt { //~ NOTE in expansion of
+     () => {
+          (1).0 //~ ERROR type was not a tuple
+     }
+}
+
+macro_rules! fake_method_expr { //~ NOTE in expansion of
+     () => {
+          1.fake() //~ ERROR does not implement any method
+     }
+}
+
+macro_rules! fake_field_expr {
+     () => {
+          1.fake
+     }
+}
+
+macro_rules! fake_anon_field_expr {
+     () => {
+          (1).0
+     }
+}
+
+fn main() {
+    fake_method_stmt!(); //~ NOTE expansion site
+    fake_field_stmt!(); //~ NOTE expansion site
+    fake_anon_field_stmt!(); //~ NOTE expansion site
+
+    let _ = fake_method_expr!(); //~ NOTE expansion site
+    let _ = fake_field_expr!(); //~ ERROR no field with that name
+    let _ = fake_anon_field_expr!(); //~ ERROR type was not a tuple
+}

src/test/compile-fail/macro-backtrace-nested.rs

@@ -0,0 +1,29 @@
+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// In expression position, but not statement position, when we expand a macro,
+// we replace the span of the expanded expression with that of the call site.
+
+macro_rules! nested_expr {
+    () => (fake)
+}
+
+macro_rules! call_nested_expr {
+    () => (nested_expr!())
+}
+
+macro_rules! call_nested_expr_sum { //~ NOTE in expansion of
+    () => { 1 + nested_expr!(); } //~ ERROR unresolved name
+}
+
+fn main() {
+    1 + call_nested_expr!(); //~ ERROR unresolved name
+    call_nested_expr_sum!(); //~ NOTE expansion site
+}

src/test/compile-fail/macro-backtrace-println.rs

@@ -0,0 +1,29 @@
+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// The `format_args!` syntax extension issues errors before code expansion
+// has completed, but we still need a backtrace.
+
+// This test includes stripped-down versions of `print!` and `println!`,
+// because we can't otherwise verify the lines of the backtrace.
+
+fn print(_args: std::fmt::Arguments) {}
+
+macro_rules! myprint { //~ NOTE in expansion of
+    ($($arg:tt)*) => (print(format_args!($($arg)*)));
+}
+
+macro_rules! myprintln { //~ NOTE in expansion of
+    ($fmt:expr) => (myprint!(concat!($fmt, "\n"))); //~ ERROR invalid reference to argument `0`
+}
+
+fn main() {
+    myprintln!("{}"); //~ NOTE expansion site
+}