From 7bec148d7967d541ca159cee6035b57006c1434a Mon Sep 17 00:00:00 2001
From: Alex Zenla <alex@fork.run>
Date: Sat, 19 Aug 2023 16:52:40 -0700
Subject: [PATCH] Rename context to scope.

---
 src/main/kotlin/gay/pizza/pork/eval/Evaluator.kt   | 14 +++++++-------
 .../gay/pizza/pork/eval/{Context.kt => Scope.kt}   |  8 ++++----
 src/main/kotlin/gay/pizza/pork/main.kt             |  8 ++++----
 3 files changed, 15 insertions(+), 15 deletions(-)
 rename src/main/kotlin/gay/pizza/pork/eval/{Context.kt => Scope.kt} (89%)

diff --git a/src/main/kotlin/gay/pizza/pork/eval/Evaluator.kt b/src/main/kotlin/gay/pizza/pork/eval/Evaluator.kt
index 8501750..6ef30d0 100644
--- a/src/main/kotlin/gay/pizza/pork/eval/Evaluator.kt
+++ b/src/main/kotlin/gay/pizza/pork/eval/Evaluator.kt
@@ -3,19 +3,19 @@ package gay.pizza.pork.eval
 import gay.pizza.pork.ast.*
 import java.util.function.Function
 
-class Evaluator(root: Context) : Visitor<Any> {
-  private var currentContext: Context = root
+class Evaluator(root: Scope) : Visitor<Any> {
+  private var currentScope: Scope = root
 
   override fun visitDefine(node: Define): Any {
     val value = visit(node.value)
-    currentContext.define(node.symbol.id, value)
+    currentScope.define(node.symbol.id, value)
     return value
   }
 
-  override fun visitFunctionCall(node: FunctionCall): Any = currentContext.call(node.symbol.id)
+  override fun visitFunctionCall(node: FunctionCall): Any = currentScope.call(node.symbol.id)
 
   override fun visitReference(node: SymbolReference): Any =
-    currentContext.value(node.symbol.id)
+    currentScope.value(node.symbol.id)
 
   override fun visitSymbol(node: Symbol): Any {
     return Unit
@@ -23,7 +23,7 @@ class Evaluator(root: Context) : Visitor<Any> {
 
   override fun visitLambda(node: Lambda): Function<Any, Any> {
     return Function { _ ->
-      currentContext = currentContext.fork()
+      currentScope = currentScope.fork()
       try {
         var value: Any? = null
         for (expression in node.expressions) {
@@ -31,7 +31,7 @@ class Evaluator(root: Context) : Visitor<Any> {
         }
         value ?: Unit
       } finally {
-        currentContext = currentContext.leave()
+        currentScope = currentScope.leave()
       }
     }
   }
diff --git a/src/main/kotlin/gay/pizza/pork/eval/Context.kt b/src/main/kotlin/gay/pizza/pork/eval/Scope.kt
similarity index 89%
rename from src/main/kotlin/gay/pizza/pork/eval/Context.kt
rename to src/main/kotlin/gay/pizza/pork/eval/Scope.kt
index c759853..2c2aee8 100644
--- a/src/main/kotlin/gay/pizza/pork/eval/Context.kt
+++ b/src/main/kotlin/gay/pizza/pork/eval/Scope.kt
@@ -2,7 +2,7 @@ package gay.pizza.pork.eval
 
 import java.util.function.Function
 
-class Context(val parent: Context? = null) {
+class Scope(val parent: Scope? = null) {
   private val variables = mutableMapOf<String, Any>()
 
   fun define(name: String, value: Any) {
@@ -33,11 +33,11 @@ class Context(val parent: Context? = null) {
     return casted.apply(argument)
   }
 
-  fun fork(): Context {
-    return Context(this)
+  fun fork(): Scope {
+    return Scope(this)
   }
 
-  fun leave(): Context {
+  fun leave(): Scope {
     if (parent == null) {
       throw RuntimeException("Parent context not found.")
     }
diff --git a/src/main/kotlin/gay/pizza/pork/main.kt b/src/main/kotlin/gay/pizza/pork/main.kt
index a28201b..5aae9a9 100644
--- a/src/main/kotlin/gay/pizza/pork/main.kt
+++ b/src/main/kotlin/gay/pizza/pork/main.kt
@@ -1,7 +1,7 @@
 package gay.pizza.pork
 
 import gay.pizza.pork.ast.*
-import gay.pizza.pork.eval.Context
+import gay.pizza.pork.eval.Scope
 import gay.pizza.pork.eval.Evaluator
 import gay.pizza.pork.parse.*
 import kotlin.io.path.Path
@@ -9,10 +9,10 @@ import kotlin.io.path.readText
 
 fun main(args: Array<String>) {
   fun eval(ast: Program) {
-    val context = Context()
-    val evaluator = Evaluator(context)
+    val scope = Scope()
+    val evaluator = Evaluator(scope)
     evaluator.visit(ast)
-    println("> ${context.call("main")}")
+    println("> ${scope.call("main")}")
   }
 
   val code = Path(args[0]).readText()