Merge pull request #476 from nevalang/enums

feat(parser): add syntax for enum const literals

.vscode/launch.json

@@ -166,6 +166,15 @@
       "cwd": "${workspaceFolder}/examples",
       "args": ["run", "7_struct_selector/verbose"]
     },
+    {
+      "name": "Neva CLI 80",
+      "type": "go",
+      "request": "launch",
+      "mode": "auto",
+      "program": "${workspaceFolder}/cmd/cli",
+      "cwd": "${workspaceFolder}/examples",
+      "args": ["run", "8_enums"]
+    },
     // === LSP ===
     {
       "name": "LSP",

README.md

@@ -36,6 +36,7 @@ Nevalang programs are executable dataflow graphs with components connected throu
 - Interpreter Mode
 - Builtin Dependency Injection
 - Builtin Observability
+- Package Management
 - Garbage Collection
 
 Please note that even though these features are technically implemented, **developer-experience may be bad** due to current project state. **No backward-compatibility** guarantees at the time.

examples/3_interfaces/simple/main.neva

@@ -0,0 +1,23 @@
+interface IPrinter<T>(data T) (sig T)
+
+component {
+    Main(start any) (stop any) {
+        nodes {
+            subNode SecondComponent {
+                depNode Printer<any>
+            }
+        }
+        net {
+            :start -> subNode:msg
+            subNode:msg -> :stop
+        }
+    }
+
+    SecondComponent (msg any) (msg any) {
+        nodes { depNode IPrinter<any> }
+        net {
+            :msg -> depNode:data
+            depNode:sig -> :msg
+        }
+    }
+}

examples/3_interfaces/main.neva → examples/3_interfaces/with_imports/main.neva

@@ -1,6 +1,4 @@
-import {
-    github.com/nevalang/x:main
-}
+import { github.com/nevalang/x:main }
 
 interface IPrinter<T>(data T) (sig T)
 

examples/4_add_numbers/verbose/main.neva

@@ -1,4 +1,3 @@
-// FIXME def conns
 component Main(start any) (stop any) {
 	nodes {
 		adder Adder<int>

examples/5_add_real_numbers/with_sub_components/main.neva

@@ -1,8 +1,6 @@
 // Here we learn how to simplify program by separating concerns
 
-import {
-	x
-}
+import { x }
 
 component {
 	Main(start any) (stop any) {

examples/8_enums/main.neva

@@ -0,0 +1,25 @@
+component Main(start any) (stop any) {
+    nodes { DayPrinter }
+    net {
+        :start -> (Day::Monday -> dayPrinter:day)
+        dayPrinter:sig -> :stop
+    }
+}
+
+type Day enum {
+    Monday,
+    Tuesday,
+    Wednesday,
+    Thursday,
+    Friday,
+    Saturday,
+    Sunday
+}
+
+component DayPrinter(day Day) (sig any) {
+    nodes { Printer<Day> }
+    net {
+        :day -> printer:data
+        printer:sig -> :sig
+    }
+}