fix constant propagation through the layers

so they can end up in the binary

lib/mom/mom_compiler.rb

@@ -6,6 +6,11 @@ module Mom
       @method_compilers = Risc::Builtin.boot_functions + compilers
     end
 
+    # collects constants from all compilers into one array
+    def constants
+      @method_compilers.inject([]){|sum ,comp| sum + comp.constants }
+    end
+
     # Translate code to whatever cpu is specified.
     # Currently only :arm and :interpret
     #
@@ -15,7 +20,7 @@ module Mom
       platform_sym = platform_sym.to_s.capitalize
       platform = Risc::Platform.for(platform_sym)
       assemblers = translate_methods( platform.translator )
-      Risc::Linker.new(platform , assemblers)
+      Risc::Linker.new(platform , assemblers , constants)
     end
 
     # go through all methods and translate them to cpu, given the translator
@@ -35,7 +40,7 @@ module Mom
         cpu_instructions << cpu if cpu
         nekst = nekst.next
       end
-      Risc::Assembler.new(compiler.method , cpu_instructions , compiler.constants)
+      Risc::Assembler.new(compiler.method , cpu_instructions )
     end
 
   end

lib/risc/assembler.rb

@@ -1,10 +1,10 @@
 module Risc
   class Assembler
-    attr_reader :method , :instructions , :constants
-    def initialize( method , instructions, constants)
+    attr_reader :method , :instructions
+
+    def initialize( method , instructions)
       @method = method
       @instructions = instructions
-      @constants = constants
       total = instructions.total_byte_length / 4 + 1
       method.binary.extend_to( total )
     end

lib/risc/linker.rb

@@ -13,7 +13,7 @@ module Risc
     include Util::Logging
     log_level :info
 
-    def initialize(platform , assemblers)
+    def initialize(platform , assemblers , constants)
       if(platform.is_a?(Symbol))
         platform = platform.to_s.capitalize
         platform = Risc::Platform.for(platform)
@@ -21,7 +21,7 @@ module Risc
       raise "Platform must be platform, not #{platform.class}" unless platform.is_a?(Platform)
       @platform = platform
       @assemblers = assemblers
-      @constants = []
+      @constants = constants
       @cpu_init = cpu_init_init
     end
 

test/mom/test_mom_compiler.rb

@@ -6,7 +6,7 @@ module Mom
 
     def setup
       Parfait.boot!
-      @comp = compile_mom( "class Test ; def main(); return 1; end; end;")
+      @comp = compile_mom( "class Test ; def main(); return 'Hi'; end; end;")
     end
 
     def test_class
@@ -15,6 +15,12 @@ module Mom
     def test_compilers
       assert_equal 24 , @comp.method_compilers.length
     end
+    def test_returns_constants
+      assert_equal Array , @comp.constants.class
+    end
+    def test_has_constant
+      assert_equal  "Hi" , @comp.constants.first.to_string
+    end
     def test_has_translate
       assert @comp.translate(:interpreter)
     end

test/mom/test_mom_compiler1.rb

@@ -6,13 +6,22 @@ module Mom
 
     def setup
       Parfait.boot!
-      @comp = compile_mom( "class Test ; def main(); return 1; end; end;")
+      @comp = compile_mom( "class Test ; def main(); return 'Hi'; end; end;")
       @linker = @comp.translate(:interpreter)
     end
 
     def test_translate_class
       assert_equal Risc::Linker , @linker.class
     end
+    def test_linker_has_constants
+      assert_equal Array , @linker.constants.class
+    end
+    def test_linker_constants_not_empty
+      assert !@linker.constants.empty?
+    end
+    def test_linker_constants_contains_hi
+      assert @linker.constants.include?("Hi")
+    end
     def test_translate_platform
       assert_kind_of Risc::Platform , @linker.platform
     end