const, if as a value, """ text over several lines, min/max/abs/clamp, import a/b and import x as y, the fs module

- const NAME = value (numbers, text, other constants; typed: const f32 G = 9.8), also module.NAME
- x := if c { a } else { b }
- """ ... """: the closing quotes' indentation goes from every line
- min, max, abs, clamp for any numbers, unless your own function has the name
- import ui/button (a module in a folder), import path as p
- fs: read_bytes, write_bytes, exists, is_dir, mkdir (with parents), list, remove_dir, data_dir(app)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016GzNP6r8dg6WDxUVZy8wjL

tests/new/fail/const_assign.fch

@@ -0,0 +1,5 @@
+// expect: is a constant; it can't be changed
+const W = 3
+fn main() {
+    W = 4
+}

tests/new/fail/const_call.fch

@@ -0,0 +1,6 @@
+// expect: a constant is made of numbers, text
+fn f() -> int { return 1 }
+const W = f()
+fn main() {
+    print(W)
+}

tests/new/fail/const_loop.fch

@@ -0,0 +1,6 @@
+// expect: is worked out from itself
+const A = B + 1
+const B = A
+fn main() {
+    print(A)
+}

tests/new/fail/ifvalue_else.fch

@@ -0,0 +1,4 @@
+// expect: an if that gives a value needs an else
+fn main() {
+    x := if true { 1 }
+}

tests/new/fail/ifvalue_types.fch

@@ -0,0 +1,4 @@
+// expect: both branches of the if have to give the same type
+fn main() {
+    x := if true { 1 } else { "one" }
+}

tests/new/fail/import_clash.fch

@@ -0,0 +1,5 @@
+// expect: is already used by another import
+import path
+import time as path
+fn main() {
+}

tests/new/fail/longstr_indent.fch

@@ -0,0 +1,6 @@
+// expect: is indented less than the closing
+fn main() {
+    s := """
+  a
+        """
+}