Reduced memory usage

src/build/ast/Count.go

@@ -3,8 +3,8 @@ package ast
 import "git.akyoto.dev/cli/q/src/build/token"
 
 // Count counts how often the given token appears in the AST.
-func Count(body AST, buffer []byte, kind token.Kind, name string) int {
-	count := 0
+func Count(body AST, buffer []byte, kind token.Kind, name string) uint8 {
+	count := uint8(0)
 
 	for _, node := range body {
 		switch node := node.(type) {

src/build/core/CompileDefinition.go

@@ -3,6 +3,7 @@ package core
 import (
 	"git.akyoto.dev/cli/q/src/build/ast"
 	"git.akyoto.dev/cli/q/src/build/errors"
+	"git.akyoto.dev/cli/q/src/build/scope"
 	"git.akyoto.dev/cli/q/src/build/token"
 )
 
@@ -20,5 +21,15 @@ func (f *Function) CompileDefinition(node *ast.Define) error {
 		return errors.New(&errors.UnusedVariable{Name: name}, f.File, node.Name.Position)
 	}
 
-	return f.storeVariableInRegister(name, node.Value, uses)
+	register := f.CurrentScope().MustFindFree(f.cpu.General)
+	f.CurrentScope().Reserve(register)
+	err := f.ExpressionToRegister(node.Value, register)
+
+	f.AddVariable(&scope.Variable{
+		Name:     name,
+		Register: register,
+		Alive:    uses,
+	})
+
+	return err
 }

src/build/core/storeVariableInRegister.go

@@ -1,20 +0,0 @@
-package core
-
-import (
-	"git.akyoto.dev/cli/q/src/build/expression"
-	"git.akyoto.dev/cli/q/src/build/scope"
-)
-
-func (f *Function) storeVariableInRegister(name string, value *expression.Expression, uses int) error {
-	reg := f.CurrentScope().MustFindFree(f.cpu.General)
-	f.CurrentScope().Reserve(reg)
-	err := f.ExpressionToRegister(value, reg)
-
-	f.AddVariable(&scope.Variable{
-		Name:     name,
-		Register: reg,
-		Alive:    uses,
-	})
-
-	return err
-}

src/build/expression/Expression.go

@@ -37,8 +37,8 @@ func (expr *Expression) AddChild(child *Expression) {
 }
 
 // Count counts how often the given token appears in the expression.
-func (expr *Expression) Count(buffer []byte, kind token.Kind, name string) int {
-	count := 0
+func (expr *Expression) Count(buffer []byte, kind token.Kind, name string) uint8 {
+	count := uint8(0)
 
 	expr.EachLeaf(func(leaf *Expression) error {
 		if leaf.Token.Kind == kind && leaf.Token.Text(buffer) == name {

src/build/scope/Variable.go

@@ -7,7 +7,7 @@ import (
 // Variable represents a named register.
 type Variable struct {
 	Name     string
-	Alive    int
+	Alive    uint8
 	Depth    uint8
 	Register cpu.Register
 }
@@ -19,9 +19,9 @@ func (v *Variable) IsAlive() bool {
 
 // Use reduces the lifetime counter by one.
 func (v *Variable) Use() {
-	v.Alive--
-
-	if v.Alive < 0 {
+	if v.Alive == 0 {
 		panic("incorrect number of variable use calls")
 	}
+
+	v.Alive--
 }

src/build/token/Count.go

@@ -1,8 +1,8 @@
 package token
 
 // Count counts how often the given token appears in the token list.
-func Count(tokens []Token, buffer []byte, kind Kind, name string) int {
-	count := 0
+func Count(tokens []Token, buffer []byte, kind Kind, name string) uint8 {
+	count := uint8(0)
 
 	for _, t := range tokens {
 		if t.Kind == Identifier && t.Text(buffer) == name {