Extract variable management, move into `state` package

3 files changed, 10 insertions, 22 deletions

diff --git a/source/primitives/conditional.d b/source/primitives/conditional.d
index 5dc0fa5..fd101bd 100644
--- a/source/primitives/conditional.d
+++ b/source/primitives/conditional.d
@@ -4,7 +4,7 @@ import std.variant;
 import std.typecons;
 import std.container : DList;
 
-import base.stack;
+import state.stack;
 
 bool handle(string word) {
 	switch ( word ) {
diff --git a/source/primitives/core.d b/source/primitives/core.d
index cae577b..75783ed 100644
--- a/source/primitives/core.d
+++ b/source/primitives/core.d
@@ -2,12 +2,10 @@ module primitives.core;
 
 import std.stdio;
 
-import base.stack;
+import state.stack;
 
 bool handle(string word) {
 	switch ( word ) {
-		case     "$"     : binary_op_variable_bind;      break;
-		case     "@"     : unary_op_variable_resolve;    break;
 		case     "+"     : binary_op_add;                break;
 		case     "*"     : binary_op_multiply;           break;
 		case     "/"     : binary_op_divide;             break;
@@ -28,22 +26,6 @@ bool handle(string word) {
 
 private {
 
-Token[string] variables;
-
-void binary_op_variable_bind() {
-	string name     = stack.pop.get!string;
-	Token  value    = stack.pop;
-	variables[name] = value;
-}
-
-void unary_op_variable_resolve() {
-	string name = stack.pop.get!string;
-
-	if ( name in variables ) {
-		stack.push(variables[name]);
-	}
-}
-
 void binary_op_add() {
 	int b = stack.pop.get!int;
 	int a = stack.pop.get!int;
diff --git a/source/primitives/eval.d b/source/primitives/eval.d
index fc5938e..a18e897 100644
--- a/source/primitives/eval.d
+++ b/source/primitives/eval.d
@@ -2,10 +2,12 @@ module primitives.eval;
 
 import std.variant;
 
-import base.stack;
+import state.stack;
+
+import definition  = state.definition;
+import variable    = state.variable;
 
 import core        = primitives.core;
-import definition  = base.definition;
 import conditional = primitives.conditional;
 
 bool evaluate(Token token) {
@@ -17,6 +19,10 @@ bool evaluate(Token token) {
 		return true;
 	}
 
+	if ( variable.handle(token) ) {
+		return true;
+	}
+
 	return token.visit!(
 		(int    value) => false,
 		(bool   value) => false,