Const analysis

[ForNeVeR]

As of now, Cesium ignores const keyword almost everywhere.

It should start analyzing const and embed this info into the type (and possibly even into CLI metadata).

See TODO[#91] in the code for possible places where this analysis can be added.

[kant2002]

I think we have const in bunch of places. Unless we want to have specific list, we can close this.

[ForNeVeR]

I believe that const check should be a part (or a stage, if you will) of the type check algorithm; the problem being we don't have it as a separate entity (yet!).

But you are right in that we should start with some concrete examples. So, let's start with this:

int main() {
    const int *x = 0;
    int *y = x;
    y[0] = 0;
}

This should not compile, yet it happily compiles in Cesium.

A quick unit test, if it helps:

Index: Cesium.CodeGen.Tests/CodeGenArrayTests.cs
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
diff --git a/Cesium.CodeGen.Tests/CodeGenArrayTests.cs b/Cesium.CodeGen.Tests/CodeGenArrayTests.cs
--- a/Cesium.CodeGen.Tests/CodeGenArrayTests.cs	(revision Staged)
+++ b/Cesium.CodeGen.Tests/CodeGenArrayTests.cs	(date 1731013354166)
@@ -14,6 +14,13 @@
         return VerifyMethods(moduleType);
     }
 
+    [Fact]
+    public Task MyCheck1() => DoTest(@"int main() {
+    const int *x = 0;
+    int *y = x;
+    y[0] = 0;
+}");
+
     [Fact]
     public Task ArrayAssignment() => DoTest(@"int main() {
     int a[10];