fixed assignment type error with structs

added structs example

.gitignore

@@ -24,8 +24,6 @@ __pycache__/
 parser.out
 parsetab.py
 .pytest_cache/
-compiler/src/prog8_kotlin.jar
-compiler/src/compiled_java
 .attach_pid*
 
 .gradle

compiler/src/prog8/ast/processing/AstChecker.kt

@@ -390,7 +390,8 @@ internal class AstChecker(private val program: Program,
                 val constVal = assignment.value.constValue(program)
                 if (constVal != null) {
                     checkValueTypeAndRange(targetDatatype, constVal)
-                    // TODO what about arrays etc:
+
+                    // TODO what about arrays, structs, strings etc:
 //                val targetVar =
 //                        if(target.identifier!=null)
 //                            program.namespace.lookup(target.identifier.nameInSource, assignment) as? VarDecl
@@ -1193,7 +1194,7 @@ internal class AstChecker(private val program: Program,
                 if (number < -32768 || number > 32767)
                     return err("value '$number' out of range for word")
             }
-            else -> return false
+            else -> return err("value of type ${value.type} not compatible with $targetDt")
         }
         return true
     }

compiler/src/prog8/vm/astvm/Expressions.kt

@@ -34,7 +34,6 @@ fun evaluate(expr: IExpression, ctx: EvalContext): RuntimeValue {
             return RuntimeValue.fromLv(expr)
         }
         is ReferenceLiteralValue -> {
-            TODO("REF $expr")
             return RuntimeValue.fromLv(expr, ctx.program.heap)
         }
         is PrefixExpression -> {

docs/source/index.rst

@@ -37,8 +37,8 @@ This software is licensed under the GNU GPL 3.0, see https://www.gnu.org/license
     :alt: Fully playable tetris clone
 
 
-Code example
-------------
+Code examples
+-------------
 
 This code calculates prime numbers using the Sieve of Eratosthenes algorithm::
 
@@ -89,13 +89,47 @@ This code calculates prime numbers using the Sieve of Eratosthenes algorithm::
     }
 
 
-when compiled an ran on a C-64 you'll get:
+when compiled an ran on a C-64 you get this:
 
 .. image:: _static/primes_example.png
     :align: center
     :alt: result when run on C-64
 
 
+The following programs shows a use of the high level ``struct`` type::
+
+    %import c64utils
+    %zeropage basicsafe
+
+    ~ main {
+
+        struct Color {
+            ubyte red
+            ubyte green
+            ubyte blue
+        }
+
+        sub start() {
+
+            Color purple = {255, 0, 255}
+            Color other
+            other = purple
+            other.red /= 2
+            other.green = 10 + other.green / 2
+            other.blue = 99
+
+            c64scr.print_ub(other.red)
+            c64.CHROUT(',')
+            c64scr.print_ub(other.green)
+            c64.CHROUT(',')
+            c64scr.print_ub(other.blue)
+            c64.CHROUT('\n')
+        }
+    }
+
+when compiled and ran, it prints  ``127,10,99`` on the screen.
+
+
 Design principles and features
 ------------------------------
 

examples/structs.p8

@@ -0,0 +1,31 @@
+%import c64utils
+%zeropage basicsafe
+
+~ main {
+
+    struct Color {
+        ubyte red
+        ubyte green
+        ubyte blue
+    }
+
+    sub start() {
+
+        Color purple = {255, 0, 255}
+
+        Color other
+
+        other = purple
+
+        other.red /= 2
+        other.green = 10 + other.green / 2
+        other.blue = 99
+
+        c64scr.print_ub(other.red)
+        c64.CHROUT(',')
+        c64scr.print_ub(other.green)
+        c64.CHROUT(',')
+        c64scr.print_ub(other.blue)
+        c64.CHROUT('\n')
+    }
+}