Fix parsing lambdas with return type

We should eat only a single block, and not whatever larger expression
may start with a block.

closes #3721

2 files changed, 46 insertions, 0 deletions

diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0158_lambda_ret_block.rs b/crates/ra_syntax/test_data/parser/inline/ok/0158_lambda_ret_block.rs
new file mode 100644
index 000000000..061118d3a
--- /dev/null
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0158_lambda_ret_block.rs
@@ -0,0 +1 @@
+fn main() { || -> i32 { 92 }(); }
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0158_lambda_ret_block.txt b/crates/ra_syntax/test_data/parser/inline/ok/0158_lambda_ret_block.txt
new file mode 100644
index 000000000..ba8779094
--- /dev/null
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0158_lambda_ret_block.txt
@@ -0,0 +1,45 @@
+SOURCE_FILE@[0; 34)
+  FN_DEF@[0; 33)
+    FN_KW@[0; 2) "fn"
+    WHITESPACE@[2; 3) " "
+    NAME@[3; 7)
+      IDENT@[3; 7) "main"
+    PARAM_LIST@[7; 9)
+      L_PAREN@[7; 8) "("
+      R_PAREN@[8; 9) ")"
+    WHITESPACE@[9; 10) " "
+    BLOCK_EXPR@[10; 33)
+      BLOCK@[10; 33)
+        L_CURLY@[10; 11) "{"
+        WHITESPACE@[11; 12) " "
+        EXPR_STMT@[12; 31)
+          CALL_EXPR@[12; 30)
+            LAMBDA_EXPR@[12; 28)
+              PARAM_LIST@[12; 14)
+                PIPE@[12; 13) "|"
+                PIPE@[13; 14) "|"
+              WHITESPACE@[14; 15) " "
+              RET_TYPE@[15; 21)
+                THIN_ARROW@[15; 17) "->"
+                WHITESPACE@[17; 18) " "
+                PATH_TYPE@[18; 21)
+                  PATH@[18; 21)
+                    PATH_SEGMENT@[18; 21)
+                      NAME_REF@[18; 21)
+                        IDENT@[18; 21) "i32"
+              WHITESPACE@[21; 22) " "
+              BLOCK_EXPR@[22; 28)
+                BLOCK@[22; 28)
+                  L_CURLY@[22; 23) "{"
+                  WHITESPACE@[23; 24) " "
+                  LITERAL@[24; 26)
+                    INT_NUMBER@[24; 26) "92"
+                  WHITESPACE@[26; 27) " "
+                  R_CURLY@[27; 28) "}"
+            ARG_LIST@[28; 30)
+              L_PAREN@[28; 29) "("
+              R_PAREN@[29; 30) ")"
+          SEMI@[30; 31) ";"
+        WHITESPACE@[31; 32) " "
+        R_CURLY@[32; 33) "}"
+  WHITESPACE@[33; 34) "\n"