test: Show frontmatter behavior before impl

Author: epage

Diff for: tests/ui/feature-gates/feature-gate-frontmatter.rs

@@ -0,0 +1,6 @@
+---
+//~^ ERROR expected item, found `-`
+---
+
+pub fn main() {
+}

Diff for: tests/ui/feature-gates/feature-gate-frontmatter.stderr

@@ -0,0 +1,10 @@
+error: expected item, found `-`
+  --> $DIR/feature-gate-frontmatter.rs:1:1
+   |
+LL | ---
+   | ^ expected item
+   |
+   = note: for a full list of items that can appear in modules, see <https://doc.rust-lang.org/reference/items.html>
+
+error: aborting due to 1 previous error
+

Diff for: tests/ui/frontmatter/frontmatter-escaped.rs

@@ -0,0 +1,12 @@
+-----
+//~^ ERROR expected item, found `-`
+
+---
+---
+
+-----
+
+#![feature(frontmatter)]
+
+fn main() {
+}

Diff for: tests/ui/frontmatter/frontmatter-escaped.stderr

@@ -0,0 +1,10 @@
+error: expected item, found `-`
+  --> $DIR/frontmatter-escaped.rs:1:1
+   |
+LL | -----
+   | ^ expected item
+   |
+   = note: for a full list of items that can appear in modules, see <https://doc.rust-lang.org/reference/items.html>
+
+error: aborting due to 1 previous error
+

Diff for: tests/ui/frontmatter/frontmatter-ignored-space.rs

@@ -0,0 +1,13 @@
+
+
+---  
+//~^ ERROR expected item, found `-`
+
+---  
+
+#![feature(frontmatter)]
+// ignore-tidy-end-whitespace
+// ignore-tidy-leading-newlines
+
+fn main() {
+}

Diff for: tests/ui/frontmatter/frontmatter-ignored-space.stderr

@@ -0,0 +1,10 @@
+error: expected item, found `-`
+  --> $DIR/frontmatter-ignored-space.rs:3:1
+   |
+LL | ---  
+   | ^ expected item
+   |
+   = note: for a full list of items that can appear in modules, see <https://doc.rust-lang.org/reference/items.html>
+
+error: aborting due to 1 previous error
+

Diff for: tests/ui/frontmatter/frontmatter-invalid-after-attribute.rs

@@ -0,0 +1,8 @@
+#![feature(frontmatter)]
+
+---
+//~^ ERROR expected item, found `-`
+---
+
+fn main() {
+}

Diff for: tests/ui/frontmatter/frontmatter-invalid-after-attribute.stderr

@@ -0,0 +1,10 @@
+error: expected item, found `-`
+  --> $DIR/frontmatter-invalid-after-attribute.rs:3:1
+   |
+LL | ---
+   | ^ expected item
+   |
+   = note: for a full list of items that can appear in modules, see <https://doc.rust-lang.org/reference/items.html>
+
+error: aborting due to 1 previous error
+

Diff for: tests/ui/frontmatter/frontmatter-invalid-after-comment.rs

@@ -0,0 +1,10 @@
+// Comment
+
+---
+//~^ ERROR expected item, found `-`
+---
+
+#![feature(frontmatter)]
+
+fn main() {
+}

Diff for: tests/ui/frontmatter/frontmatter-invalid-after-comment.stderr

@@ -0,0 +1,10 @@
+error: expected item, found `-`
+  --> $DIR/frontmatter-invalid-after-comment.rs:3:1
+   |
+LL | ---
+   | ^ expected item
+   |
+   = note: for a full list of items that can appear in modules, see <https://doc.rust-lang.org/reference/items.html>
+
+error: aborting due to 1 previous error
+

Diff for: tests/ui/frontmatter/frontmatter-invalid-escaped.rs

@@ -0,0 +1,12 @@
+---
+//~^ ERROR expected item, found `-`
+
+-----
+-----
+
+---
+
+#![feature(frontmatter)]
+
+fn main() {
+}

Diff for: tests/ui/frontmatter/frontmatter-invalid-escaped.stderr

@@ -0,0 +1,10 @@
+error: expected item, found `-`
+  --> $DIR/frontmatter-invalid-escaped.rs:1:1
+   |
+LL | ---
+   | ^ expected item
+   |
+   = note: for a full list of items that can appear in modules, see <https://doc.rust-lang.org/reference/items.html>
+
+error: aborting due to 1 previous error
+

Diff for: tests/ui/frontmatter/frontmatter-invalid-in-fn.rs

@@ -0,0 +1,8 @@
+#![feature(frontmatter)]
+//~^ unknown feature `frontmatter`
+
+fn main() {
+---
+---
+}
+//~^ ERROR expected expression, found `}`

Diff for: tests/ui/frontmatter/frontmatter-invalid-in-fn.stderr

@@ -0,0 +1,15 @@
+error: expected expression, found `}`
+  --> $DIR/frontmatter-invalid-in-fn.rs:7:1
+   |
+LL | }
+   | ^ expected expression
+
+error[E0635]: unknown feature `frontmatter`
+  --> $DIR/frontmatter-invalid-in-fn.rs:1:12
+   |
+LL | #![feature(frontmatter)]
+   |            ^^^^^^^^^^^
+
+error: aborting due to 2 previous errors
+
+For more information about this error, try `rustc --explain E0635`.

Diff for: tests/ui/frontmatter/frontmatter-invalid-indentation.rs

@@ -0,0 +1,8 @@
+  ---
+//~^ ERROR expected item, found `-`
+  ---
+
+#![feature(frontmatter)]
+
+fn main() {
+}

Diff for: tests/ui/frontmatter/frontmatter-invalid-indentation.stderr

@@ -0,0 +1,10 @@
+error: expected item, found `-`
+  --> $DIR/frontmatter-invalid-indentation.rs:1:3
+   |
+LL |   ---
+   |   ^ expected item
+   |
+   = note: for a full list of items that can appear in modules, see <https://doc.rust-lang.org/reference/items.html>
+
+error: aborting due to 1 previous error
+

Diff for: tests/ui/frontmatter/frontmatter-invalid-mismatched-close.rs

@@ -0,0 +1,8 @@
+---
+//~^ ERROR expected item, found `-`
+----
+
+#![feature(frontmatter)]
+
+fn main() {
+}

Diff for: tests/ui/frontmatter/frontmatter-invalid-mismatched-close.stderr

@@ -0,0 +1,10 @@
+error: expected item, found `-`
+  --> $DIR/frontmatter-invalid-mismatched-close.rs:1:1
+   |
+LL | ---
+   | ^ expected item
+   |
+   = note: for a full list of items that can appear in modules, see <https://doc.rust-lang.org/reference/items.html>
+
+error: aborting due to 1 previous error
+

Diff for: tests/ui/frontmatter/frontmatter-invalid-multiple.rs

@@ -0,0 +1,11 @@
+---cargo
+//~^ ERROR expected item, found `-`
+---
+
+---buck
+---
+
+#![feature(frontmatter)]
+
+fn main() {
+}

Diff for: tests/ui/frontmatter/frontmatter-invalid-multiple.stderr

@@ -0,0 +1,10 @@
+error: expected item, found `-`
+  --> $DIR/frontmatter-invalid-multiple.rs:1:1
+   |
+LL | ---cargo
+   | ^ expected item
+   |
+   = note: for a full list of items that can appear in modules, see <https://doc.rust-lang.org/reference/items.html>
+
+error: aborting due to 1 previous error
+

Diff for: tests/ui/frontmatter/frontmatter-invalid-non-ident-infostring.rs

@@ -0,0 +1,8 @@
+---cargo,hello-world
+//~^ ERROR expected item, found `-`
+---
+
+#![feature(frontmatter)]
+
+fn main() {
+}

Diff for: tests/ui/frontmatter/frontmatter-invalid-non-ident-infostring.stderr

@@ -0,0 +1,10 @@
+error: expected item, found `-`
+  --> $DIR/frontmatter-invalid-non-ident-infostring.rs:1:1
+   |
+LL | ---cargo,hello-world
+   | ^ expected item
+   |
+   = note: for a full list of items that can appear in modules, see <https://doc.rust-lang.org/reference/items.html>
+
+error: aborting due to 1 previous error
+

Diff for: tests/ui/frontmatter/frontmatter-invalid-short-open.rs

@@ -0,0 +1,8 @@
+--
+//~^ ERROR expected item, found `-`
+--
+
+#![feature(frontmatter)]
+
+fn main() {
+}

Diff for: tests/ui/frontmatter/frontmatter-invalid-short-open.stderr

@@ -0,0 +1,10 @@
+error: expected item, found `-`
+  --> $DIR/frontmatter-invalid-short-open.rs:1:1
+   |
+LL | --
+   | ^ expected item
+   |
+   = note: for a full list of items that can appear in modules, see <https://doc.rust-lang.org/reference/items.html>
+
+error: aborting due to 1 previous error
+

Diff for: tests/ui/frontmatter/frontmatter-invalid-trailing-text.rs

@@ -0,0 +1,8 @@
+---
+//~^ ERROR expected item, found `-`
+--- text
+
+#![feature(frontmatter)]
+
+fn main() {
+}

Diff for: tests/ui/frontmatter/frontmatter-invalid-trailing-text.stderr

@@ -0,0 +1,10 @@
+error: expected item, found `-`
+  --> $DIR/frontmatter-invalid-trailing-text.rs:1:1
+   |
+LL | ---
+   | ^ expected item
+   |
+   = note: for a full list of items that can appear in modules, see <https://doc.rust-lang.org/reference/items.html>
+
+error: aborting due to 1 previous error
+

Diff for: tests/ui/frontmatter/frontmatter-invalid-unclosed.rs

@@ -0,0 +1,7 @@
+---
+//~^ ERROR expected item, found `-`
+
+#![feature(frontmatter)]
+
+fn main() {
+}

Diff for: tests/ui/frontmatter/frontmatter-invalid-unclosed.stderr

@@ -0,0 +1,10 @@
+error: expected item, found `-`
+  --> $DIR/frontmatter-invalid-unclosed.rs:1:1
+   |
+LL | ---
+   | ^ expected item
+   |
+   = note: for a full list of items that can appear in modules, see <https://doc.rust-lang.org/reference/items.html>
+
+error: aborting due to 1 previous error
+

Diff for: tests/ui/frontmatter/frontmatter-with-body.rs

@@ -0,0 +1,9 @@
+---
+//~^ ERROR expected item, found `-`
+[dependencies]
+---
+
+#![feature(frontmatter)]
+
+fn main() {
+}

Diff for: tests/ui/frontmatter/frontmatter-with-body.stderr

@@ -0,0 +1,10 @@
+error: expected item, found `-`
+  --> $DIR/frontmatter-with-body.rs:1:1
+   |
+LL | ---
+   | ^ expected item
+   |
+   = note: for a full list of items that can appear in modules, see <https://doc.rust-lang.org/reference/items.html>
+
+error: aborting due to 1 previous error
+

Diff for: tests/ui/frontmatter/frontmatter-with-infostring-spaces.rs

@@ -0,0 +1,8 @@
+--- cargo
+//~^ ERROR expected item, found `-`
+---
+
+#![feature(frontmatter)]
+
+fn main() {
+}

Diff for: tests/ui/frontmatter/frontmatter-with-infostring-spaces.stderr

@@ -0,0 +1,10 @@
+error: expected item, found `-`
+  --> $DIR/frontmatter-with-infostring-spaces.rs:1:1
+   |
+LL | --- cargo
+   | ^ expected item
+   |
+   = note: for a full list of items that can appear in modules, see <https://doc.rust-lang.org/reference/items.html>
+
+error: aborting due to 1 previous error
+

Diff for: tests/ui/frontmatter/frontmatter-with-infostring.rs

@@ -0,0 +1,8 @@
+---cargo
+//~^ ERROR expected item, found `-`
+---
+
+#![feature(frontmatter)]
+
+fn main() {
+}

Diff for: tests/ui/frontmatter/frontmatter-with-infostring.stderr

@@ -0,0 +1,10 @@
+error: expected item, found `-`
+  --> $DIR/frontmatter-with-infostring.rs:1:1
+   |
+LL | ---cargo
+   | ^ expected item
+   |
+   = note: for a full list of items that can appear in modules, see <https://doc.rust-lang.org/reference/items.html>
+
+error: aborting due to 1 previous error
+

Diff for: tests/ui/frontmatter/frontmatter.rs

@@ -0,0 +1,8 @@
+---
+//~^ ERROR expected item, found `-`
+---
+
+#![feature(frontmatter)]
+
+fn main() {
+}

Diff for: tests/ui/frontmatter/frontmatter.stderr

@@ -0,0 +1,10 @@
+error: expected item, found `-`
+  --> $DIR/frontmatter.rs:1:1
+   |
+LL | ---
+   | ^ expected item
+   |
+   = note: for a full list of items that can appear in modules, see <https://doc.rust-lang.org/reference/items.html>
+
+error: aborting due to 1 previous error
+

Diff for: tests/ui/unpretty/frontmatter.rs

@@ -0,0 +1,10 @@
+---
+//~^ ERROR expected item, found `-`
+---
+
+//@ compile-flags: -Zunpretty=normal
+
+#![feature(frontmatter)]
+
+fn main() {
+}