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How the vanilla code generation strategy handles variables.

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§1.

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-int variables_written = FALSE, prepare_counter = 0, knowledge_counter = 0;
-void VanillaVariables::prepare(code_generation *gen) {
-    variables_written = FALSE;
-    prepare_counter = 0;
-    knowledge_counter = 0;
-    InterTree::traverse(gen->from, VanillaVariables::visitor1, gen, NULL, VARIABLE_IST);
-}
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-void VanillaVariables::visitor1(inter_tree *I, inter_tree_node *P, void *state) {
-    code_generation *gen = (code_generation *) state;
-    inter_symbol *var_name = InterSymbolsTables::symbol_from_frame_data(P, DEFN_VAR_IFLD);
-    prepare_counter = Generators::prepare_variable(gen, P, var_name, prepare_counter);
-}
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-void VanillaVariables::variable(code_generation *gen, inter_tree_node *P) {
-    if (variables_written == FALSE) {
-        variables_written = TRUE;
-        InterTree::traverse(gen->from, VanillaVariables::visitor2, gen, NULL, VARIABLE_IST);
-    }
-}
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-void VanillaVariables::visitor2(inter_tree *I, inter_tree_node *P, void *state) {
-    code_generation *gen = (code_generation *) state;
-    inter_symbol *var_name = InterSymbolsTables::symbol_from_frame_data(P, DEFN_VAR_IFLD);
-    knowledge_counter = Generators::declare_variable(gen, P, var_name, knowledge_counter, prepare_counter);
-}
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-void VanillaVariables::consolidate(code_generation *gen) {
-}
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