Auto merge of #30953 - KalitaAlexey:17823-get-rid-of-duplicate-error, r=nrc

src/librustc/middle/infer/error_reporting.rs

@@ -486,13 +486,24 @@ impl<'a, 'tcx> ErrorReporting<'tcx> for InferCtxt<'a, 'tcx> {
             }
         };
 
+        let is_simple_error = if let &TypeError::Sorts(ref values) = terr {
+            values.expected.is_primitive() && values.found.is_primitive()
+        } else {
+            false
+        };
+
+        let expected_found_str = if is_simple_error {
+            expected_found_str
+        } else {
+            format!("{} ({})", expected_found_str, terr)
+        };
+
         let mut err = struct_span_err!(self.tcx.sess,
                                        trace.origin.span(),
                                        E0308,
-                                       "{}: {} ({})",
+                                       "{}: {}",
                                        trace.origin,
-                                       expected_found_str,
-                                       terr);
+                                       expected_found_str);
 
         self.check_and_note_conflicting_crates(&mut err, terr, trace.origin.span());
 

src/librustc/middle/ty/sty.rs

@@ -910,6 +910,13 @@ impl<'tcx> TyS<'tcx> {
         }
     }
 
+    pub fn is_primitive(&self) -> bool {
+        match self.sty {
+            TyBool | TyChar | TyInt(_) | TyUint(_) | TyFloat(_) => true,
+            _ => false,
+        }
+    }
+
     pub fn is_ty_var(&self) -> bool {
         match self.sty {
             TyInfer(TyVar(_)) => true,

src/test/compile-fail/if-branch-types.rs

@@ -13,6 +13,4 @@ fn main() {
     //~^ ERROR if and else have incompatible types
     //~| expected `i32`
     //~| found `u32`
-    //~| expected i32
-    //~| found u32
 }

src/test/compile-fail/integer-literal-suffix-inference.rs

@@ -43,79 +43,55 @@ fn main() {
     //~^ ERROR mismatched types
     //~| expected `i8`
     //~| found `i16`
-    //~| expected i8
-    //~| found i16
     id_i8(a32);
     //~^ ERROR mismatched types
     //~| expected `i8`
     //~| found `i32`
-    //~| expected i8
-    //~| found i32
     id_i8(a64);
     //~^ ERROR mismatched types
     //~| expected `i8`
     //~| found `i64`
-    //~| expected i8
-    //~| found i64
 
     id_i16(a8);
     //~^ ERROR mismatched types
     //~| expected `i16`
     //~| found `i8`
-    //~| expected i16
-    //~| found i8
     id_i16(a16); // ok
     id_i16(a32);
     //~^ ERROR mismatched types
     //~| expected `i16`
     //~| found `i32`
-    //~| expected i16
-    //~| found i32
     id_i16(a64);
     //~^ ERROR mismatched types
     //~| expected `i16`
     //~| found `i64`
-    //~| expected i16
-    //~| found i64
 
     id_i32(a8);
     //~^ ERROR mismatched types
     //~| expected `i32`
     //~| found `i8`
-    //~| expected i32
-    //~| found i8
     id_i32(a16);
     //~^ ERROR mismatched types
     //~| expected `i32`
     //~| found `i16`
-    //~| expected i32
-    //~| found i16
     id_i32(a32); // ok
     id_i32(a64);
     //~^ ERROR mismatched types
     //~| expected `i32`
     //~| found `i64`
-    //~| expected i32
-    //~| found i64
 
     id_i64(a8);
     //~^ ERROR mismatched types
     //~| expected `i64`
     //~| found `i8`
-    //~| expected i64
-    //~| found i8
     id_i64(a16);
     //~^ ERROR mismatched types
     //~| expected `i64`
     //~| found `i16`
-    //~| expected i64
-    //~| found i16
     id_i64(a32);
     //~^ ERROR mismatched types
     //~| expected `i64`
     //~| found `i32`
-    //~| expected i64
-    //~| found i32
     id_i64(a64); // ok
 
     id_i8(c8); // ok
@@ -123,79 +99,55 @@ fn main() {
     //~^ ERROR mismatched types
     //~| expected `i8`
     //~| found `i16`
-    //~| expected i8
-    //~| found i16
     id_i8(c32);
     //~^ ERROR mismatched types
     //~| expected `i8`
     //~| found `i32`
-    //~| expected i8
-    //~| found i32
     id_i8(c64);
     //~^ ERROR mismatched types
     //~| expected `i8`
     //~| found `i64`
-    //~| expected i8
-    //~| found i64
 
     id_i16(c8);
     //~^ ERROR mismatched types
     //~| expected `i16`
     //~| found `i8`
-    //~| expected i16
-    //~| found i8
     id_i16(c16); // ok
     id_i16(c32);
     //~^ ERROR mismatched types
     //~| expected `i16`
     //~| found `i32`
-    //~| expected i16
-    //~| found i32
     id_i16(c64);
     //~^ ERROR mismatched types
     //~| expected `i16`
     //~| found `i64`
-    //~| expected i16
-    //~| found i64
 
     id_i32(c8);
     //~^ ERROR mismatched types
     //~| expected `i32`
     //~| found `i8`
-    //~| expected i32
-    //~| found i8
     id_i32(c16);
     //~^ ERROR mismatched types
     //~| expected `i32`
     //~| found `i16`
-    //~| expected i32
-    //~| found i16
     id_i32(c32); // ok
     id_i32(c64);
     //~^ ERROR mismatched types
     //~| expected `i32`
     //~| found `i64`
-    //~| expected i32
-    //~| found i64
 
     id_i64(a8);
     //~^ ERROR mismatched types
     //~| expected `i64`
     //~| found `i8`
-    //~| expected i64
-    //~| found i8
     id_i64(a16);
     //~^ ERROR mismatched types
     //~| expected `i64`
-    //~| found `i16`
-    //~| expected i64
     //~| found i16
     id_i64(a32);
     //~^ ERROR mismatched types
     //~| expected `i64`
     //~| found `i32`
-    //~| expected i64
-    //~| found i32
     id_i64(a64); // ok
 
     id_u8(b8); // ok
@@ -203,78 +155,54 @@ fn main() {
     //~^ ERROR mismatched types
     //~| expected `u8`
     //~| found `u16`
-    //~| expected u8
-    //~| found u16
     id_u8(b32);
     //~^ ERROR mismatched types
     //~| expected `u8`
     //~| found `u32`
-    //~| expected u8
-    //~| found u32
     id_u8(b64);
     //~^ ERROR mismatched types
     //~| expected `u8`
     //~| found `u64`
-    //~| expected u8
-    //~| found u64
 
     id_u16(b8);
     //~^ ERROR mismatched types
     //~| expected `u16`
     //~| found `u8`
-    //~| expected u16
-    //~| found u8
     id_u16(b16); // ok
     id_u16(b32);
     //~^ ERROR mismatched types
     //~| expected `u16`
     //~| found `u32`
-    //~| expected u16
-    //~| found u32
     id_u16(b64);
     //~^ ERROR mismatched types
     //~| expected `u16`
     //~| found `u64`
-    //~| expected u16
-    //~| found u64
 
     id_u32(b8);
     //~^ ERROR mismatched types
     //~| expected `u32`
     //~| found `u8`
-    //~| expected u32
-    //~| found u8
     id_u32(b16);
     //~^ ERROR mismatched types
     //~| expected `u32`
     //~| found `u16`
-    //~| expected u32
-    //~| found u16
     id_u32(b32); // ok
     id_u32(b64);
     //~^ ERROR mismatched types
     //~| expected `u32`
     //~| found `u64`
-    //~| expected u32
-    //~| found u64
 
     id_u64(b8);
     //~^ ERROR mismatched types
     //~| expected `u64`
     //~| found `u8`
-    //~| expected u64
-    //~| found u8
     id_u64(b16);
     //~^ ERROR mismatched types
     //~| expected `u64`
     //~| found `u16`
-    //~| expected u64
-    //~| found u16
     id_u64(b32);
     //~^ ERROR mismatched types
     //~| expected `u64`
     //~| found `u32`
-    //~| expected u64
-    //~| found u32
     id_u64(b64); // ok
 }

src/test/compile-fail/issue-13359.rs

@@ -17,13 +17,9 @@ fn main() {
     //~^ ERROR mismatched types
     //~| expected `i16`
     //~| found `isize`
-    //~| expected i16
-    //~| found isize
 
     bar(1*(1 as usize));
     //~^ ERROR mismatched types
     //~| expected `u32`
     //~| found `usize`
-    //~| expected u32
-    //~| found usize
 }

src/test/compile-fail/issue-3477.rs

@@ -13,6 +13,4 @@ fn main() {
     //~^ ERROR mismatched types
     //~| expected `char`
     //~| found `u8`
-    //~| expected char
-    //~| found u8
 }

src/test/compile-fail/issue-5100.rs

@@ -71,6 +71,4 @@ fn main() {
     let x: char = true; //~  ERROR mismatched types
                         //~| expected `char`
                         //~| found `bool`
-                        //~| expected char
-                        //~| found bool
 }

src/test/compile-fail/issue-8761.rs

@@ -13,14 +13,10 @@ enum Foo {
     //~^ ERROR mismatched types
     //~| expected `isize`
     //~| found `i64`
-    //~| expected isize
-    //~| found i64
     B = 2u8
     //~^ ERROR mismatched types
     //~| expected `isize`
     //~| found `u8`
-    //~| expected isize
-    //~| found u8
 }
 
 fn main() {}

src/test/compile-fail/pattern-error-continue.rs

@@ -42,6 +42,4 @@ fn main() {
     //~^ ERROR mismatched types
     //~| expected `char`
     //~| found `bool`
-    //~| expected char
-    //~| found bool
 }

src/test/compile-fail/pptypedef.rs

@@ -15,13 +15,9 @@ fn main() {
     //~^ ERROR mismatched types
     //~| expected `u32`
     //~| found `i32`
-    //~| expected u32
-    //~| found i32
 
     let_in(3i32, |i| { assert!(i == 3u32); });
     //~^ ERROR mismatched types
     //~| expected `i32`
     //~| found `u32`
-    //~| expected i32
-    //~| found u32
 }

src/test/compile-fail/repeat_count.rs

@@ -25,8 +25,6 @@ fn main() {
     //~^ ERROR mismatched types
     //~| expected `usize`
     //~| found `bool`
-    //~| expected usize
-    //~| found bool) [E0308]
     //~| ERROR expected positive integer for repeat count, found boolean [E0306]
     let d = [0; 0.5];
     //~^ ERROR mismatched types
@@ -46,15 +44,11 @@ fn main() {
     //~^ ERROR mismatched types
     //~| expected `usize`
     //~| found `isize`
-    //~| expected usize
-    //~| found isize) [E0308]
     //~| ERROR expected positive integer for repeat count, found negative integer [E0306]
     let f = [0_usize; -1_isize];
     //~^ ERROR mismatched types
     //~| expected `usize`
     //~| found `isize`
-    //~| expected usize
-    //~| found isize) [E0308]
     //~| ERROR expected positive integer for repeat count, found negative integer [E0306]
     struct G {
         g: (),

src/test/compile-fail/shift-various-bad-types.rs

@@ -36,8 +36,6 @@ fn foo(p: &Panolpy) {
     //~^ ERROR mismatched types
     //~| expected `i32`
     //~| found `i64`
-    //~| expected i32
-    //~| found i64)
 }
 
 fn main() {

src/test/compile-fail/tutorial-suffix-inference-test.rs

@@ -20,14 +20,10 @@ fn main() {
     //~^ ERROR mismatched types
     //~| expected `u16`
     //~| found `u8`
-    //~| expected u16
-    //~| found u8
     identity_u16(y);
     //~^ ERROR mismatched types
     //~| expected `u16`
     //~| found `i32`
-    //~| expected u16
-    //~| found i32
 
     let a = 3;
 
@@ -38,7 +34,4 @@ fn main() {
     //~^ ERROR mismatched types
     //~| expected `u16`
     //~| found `isize`
-    //~| expected u16
-    //~| found isize
-
 }

src/test/compile-fail/type-mismatch-multiple.rs

@@ -19,5 +19,4 @@ fn main() { let a: bool = 1; let b: i32 = true; }
 //~| ERROR mismatched types
 //~| expected `i32`
 //~| found `bool`
-//~| expected i32
-//~| found bool
+