Support `expand` on concrete tuple values. (#8106)

Closes #8061.

Along with the fix, also enhanced coercion/overload resolution to filter
candidates based on the target type, allowing
`tests\language-feature\higher-order-functions\overloaded.slang` to
pass.

2 files changed, 10 insertions, 11 deletions

diff --git a/tests/language-feature/higher-order-functions/overloaded.slang b/tests/language-feature/higher-order-functions/overloaded.slang
index ebbc6ed19..d3d495bc1 100644
--- a/tests/language-feature/higher-order-functions/overloaded.slang
+++ b/tests/language-feature/higher-order-functions/overloaded.slang
@@ -1,11 +1,11 @@
-//TEST:SIMPLE:
+//TEST:INTERPRET(filecheck=CHECK):
 
 func foo(f : functype (float) -> int) -> int{
     return f(0);
 }
 
 int bit<T>(T) {
-    return 1;
+    return 10;
 }
 
 int bit<T, let N : int>(vector<T, N>) {
@@ -13,6 +13,13 @@ int bit<T, let N : int>(vector<T, N>) {
 }
 
 int zit() {
-    // In an ideal world in this case we could infer that we want bit<T>
+    // even though foo is overloaded, we should still be able to infer that we want bit<T>
+    // based on the parameter (expected) type.
     return foo(bit<float>);
 }
+
+void main()
+{
+    // CHECK: 10
+    printf("%d\n", zit());
+}
\ No newline at end of file
diff --git a/tests/language-feature/higher-order-functions/overloaded.slang.expected b/tests/language-feature/higher-order-functions/overloaded.slang.expected
deleted file mode 100644
index 3d02bf06f..000000000
--- a/tests/language-feature/higher-order-functions/overloaded.slang.expected
+++ /dev/null
@@ -1,8 +0,0 @@
-result code = -1
-standard error = {
-tests/language-feature/higher-order-functions/overloaded.slang(17): error 39999: passing overloaded functions to higher order functions is not supported
-    return foo(bit<float>);
-              ^
-}
-standard output = {
-}