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-rw-r--r--code/Interpreter2/.idea/misc.xml6
-rw-r--r--code/Interpreter2/.idea/modules.xml8
-rw-r--r--code/Interpreter2/.idea/uiDesigner.xml124
-rw-r--r--code/Interpreter2/.idea/vcs.xml6
-rw-r--r--code/Interpreter2/.idea/workspace.xml69
-rw-r--r--code/Interpreter2/Interpreter2.iml11
-rw-r--r--code/Interpreter2/example.txt12
-rw-r--r--code/Interpreter2/src/Interpreter/Environment.java30
-rw-r--r--code/Interpreter2/src/Interpreter/Expression.java84
-rw-r--r--code/Interpreter2/src/Interpreter/Interpreter.java131
-rw-r--r--code/Interpreter2/src/Interpreter/Language.java63
-rw-r--r--code/Interpreter2/src/Interpreter/Parser.java179
-rw-r--r--code/Interpreter2/src/Interpreter/Statement.java49
-rw-r--r--code/Interpreter2/src/Interpreter/Token.java23
-rw-r--r--code/Interpreter2/src/Interpreter/TokenScanner.java179
-rw-r--r--code/Interpreter2/src/Interpreter/TokenType.java17
16 files changed, 0 insertions, 991 deletions
diff --git a/code/Interpreter2/.idea/misc.xml b/code/Interpreter2/.idea/misc.xml
deleted file mode 100644
index b1001d2..0000000
--- a/code/Interpreter2/.idea/misc.xml
+++ /dev/null
@@ -1,6 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
- <component name="ProjectRootManager" version="2" languageLevel="JDK_15" default="true" project-jdk-name="openjdk-15" project-jdk-type="JavaSDK">
- <output url="file://$PROJECT_DIR$/out" />
- </component>
-</project> \ No newline at end of file
diff --git a/code/Interpreter2/.idea/modules.xml b/code/Interpreter2/.idea/modules.xml
deleted file mode 100644
index 944dd7c..0000000
--- a/code/Interpreter2/.idea/modules.xml
+++ /dev/null
@@ -1,8 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
- <component name="ProjectModuleManager">
- <modules>
- <module fileurl="file://$PROJECT_DIR$/Interpreter2.iml" filepath="$PROJECT_DIR$/Interpreter2.iml" />
- </modules>
- </component>
-</project> \ No newline at end of file
diff --git a/code/Interpreter2/.idea/uiDesigner.xml b/code/Interpreter2/.idea/uiDesigner.xml
deleted file mode 100644
index e96534f..0000000
--- a/code/Interpreter2/.idea/uiDesigner.xml
+++ /dev/null
@@ -1,124 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
- <component name="Palette2">
- <group name="Swing">
- <item class="com.intellij.uiDesigner.HSpacer" tooltip-text="Horizontal Spacer" icon="/com/intellij/uiDesigner/icons/hspacer.png" removable="false" auto-create-binding="false" can-attach-label="false">
- <default-constraints vsize-policy="1" hsize-policy="6" anchor="0" fill="1" />
- </item>
- <item class="com.intellij.uiDesigner.VSpacer" tooltip-text="Vertical Spacer" icon="/com/intellij/uiDesigner/icons/vspacer.png" removable="false" auto-create-binding="false" can-attach-label="false">
- <default-constraints vsize-policy="6" hsize-policy="1" anchor="0" fill="2" />
- </item>
- <item class="javax.swing.JPanel" icon="/com/intellij/uiDesigner/icons/panel.png" removable="false" auto-create-binding="false" can-attach-label="false">
- <default-constraints vsize-policy="3" hsize-policy="3" anchor="0" fill="3" />
- </item>
- <item class="javax.swing.JScrollPane" icon="/com/intellij/uiDesigner/icons/scrollPane.png" removable="false" auto-create-binding="false" can-attach-label="true">
- <default-constraints vsize-policy="7" hsize-policy="7" anchor="0" fill="3" />
- </item>
- <item class="javax.swing.JButton" icon="/com/intellij/uiDesigner/icons/button.png" removable="false" auto-create-binding="true" can-attach-label="false">
- <default-constraints vsize-policy="0" hsize-policy="3" anchor="0" fill="1" />
- <initial-values>
- <property name="text" value="Button" />
- </initial-values>
- </item>
- <item class="javax.swing.JRadioButton" icon="/com/intellij/uiDesigner/icons/radioButton.png" removable="false" auto-create-binding="true" can-attach-label="false">
- <default-constraints vsize-policy="0" hsize-policy="3" anchor="8" fill="0" />
- <initial-values>
- <property name="text" value="RadioButton" />
- </initial-values>
- </item>
- <item class="javax.swing.JCheckBox" icon="/com/intellij/uiDesigner/icons/checkBox.png" removable="false" auto-create-binding="true" can-attach-label="false">
- <default-constraints vsize-policy="0" hsize-policy="3" anchor="8" fill="0" />
- <initial-values>
- <property name="text" value="CheckBox" />
- </initial-values>
- </item>
- <item class="javax.swing.JLabel" icon="/com/intellij/uiDesigner/icons/label.png" removable="false" auto-create-binding="false" can-attach-label="false">
- <default-constraints vsize-policy="0" hsize-policy="0" anchor="8" fill="0" />
- <initial-values>
- <property name="text" value="Label" />
- </initial-values>
- </item>
- <item class="javax.swing.JTextField" icon="/com/intellij/uiDesigner/icons/textField.png" removable="false" auto-create-binding="true" can-attach-label="true">
- <default-constraints vsize-policy="0" hsize-policy="6" anchor="8" fill="1">
- <preferred-size width="150" height="-1" />
- </default-constraints>
- </item>
- <item class="javax.swing.JPasswordField" icon="/com/intellij/uiDesigner/icons/passwordField.png" removable="false" auto-create-binding="true" can-attach-label="true">
- <default-constraints vsize-policy="0" hsize-policy="6" anchor="8" fill="1">
- <preferred-size width="150" height="-1" />
- </default-constraints>
- </item>
- <item class="javax.swing.JFormattedTextField" icon="/com/intellij/uiDesigner/icons/formattedTextField.png" removable="false" auto-create-binding="true" can-attach-label="true">
- <default-constraints vsize-policy="0" hsize-policy="6" anchor="8" fill="1">
- <preferred-size width="150" height="-1" />
- </default-constraints>
- </item>
- <item class="javax.swing.JTextArea" icon="/com/intellij/uiDesigner/icons/textArea.png" removable="false" auto-create-binding="true" can-attach-label="true">
- <default-constraints vsize-policy="6" hsize-policy="6" anchor="0" fill="3">
- <preferred-size width="150" height="50" />
- </default-constraints>
- </item>
- <item class="javax.swing.JTextPane" icon="/com/intellij/uiDesigner/icons/textPane.png" removable="false" auto-create-binding="true" can-attach-label="true">
- <default-constraints vsize-policy="6" hsize-policy="6" anchor="0" fill="3">
- <preferred-size width="150" height="50" />
- </default-constraints>
- </item>
- <item class="javax.swing.JEditorPane" icon="/com/intellij/uiDesigner/icons/editorPane.png" removable="false" auto-create-binding="true" can-attach-label="true">
- <default-constraints vsize-policy="6" hsize-policy="6" anchor="0" fill="3">
- <preferred-size width="150" height="50" />
- </default-constraints>
- </item>
- <item class="javax.swing.JComboBox" icon="/com/intellij/uiDesigner/icons/comboBox.png" removable="false" auto-create-binding="true" can-attach-label="true">
- <default-constraints vsize-policy="0" hsize-policy="2" anchor="8" fill="1" />
- </item>
- <item class="javax.swing.JTable" icon="/com/intellij/uiDesigner/icons/table.png" removable="false" auto-create-binding="true" can-attach-label="false">
- <default-constraints vsize-policy="6" hsize-policy="6" anchor="0" fill="3">
- <preferred-size width="150" height="50" />
- </default-constraints>
- </item>
- <item class="javax.swing.JList" icon="/com/intellij/uiDesigner/icons/list.png" removable="false" auto-create-binding="true" can-attach-label="false">
- <default-constraints vsize-policy="6" hsize-policy="2" anchor="0" fill="3">
- <preferred-size width="150" height="50" />
- </default-constraints>
- </item>
- <item class="javax.swing.JTree" icon="/com/intellij/uiDesigner/icons/tree.png" removable="false" auto-create-binding="true" can-attach-label="false">
- <default-constraints vsize-policy="6" hsize-policy="6" anchor="0" fill="3">
- <preferred-size width="150" height="50" />
- </default-constraints>
- </item>
- <item class="javax.swing.JTabbedPane" icon="/com/intellij/uiDesigner/icons/tabbedPane.png" removable="false" auto-create-binding="true" can-attach-label="false">
- <default-constraints vsize-policy="3" hsize-policy="3" anchor="0" fill="3">
- <preferred-size width="200" height="200" />
- </default-constraints>
- </item>
- <item class="javax.swing.JSplitPane" icon="/com/intellij/uiDesigner/icons/splitPane.png" removable="false" auto-create-binding="false" can-attach-label="false">
- <default-constraints vsize-policy="3" hsize-policy="3" anchor="0" fill="3">
- <preferred-size width="200" height="200" />
- </default-constraints>
- </item>
- <item class="javax.swing.JSpinner" icon="/com/intellij/uiDesigner/icons/spinner.png" removable="false" auto-create-binding="true" can-attach-label="true">
- <default-constraints vsize-policy="0" hsize-policy="6" anchor="8" fill="1" />
- </item>
- <item class="javax.swing.JSlider" icon="/com/intellij/uiDesigner/icons/slider.png" removable="false" auto-create-binding="true" can-attach-label="false">
- <default-constraints vsize-policy="0" hsize-policy="6" anchor="8" fill="1" />
- </item>
- <item class="javax.swing.JSeparator" icon="/com/intellij/uiDesigner/icons/separator.png" removable="false" auto-create-binding="false" can-attach-label="false">
- <default-constraints vsize-policy="6" hsize-policy="6" anchor="0" fill="3" />
- </item>
- <item class="javax.swing.JProgressBar" icon="/com/intellij/uiDesigner/icons/progressbar.png" removable="false" auto-create-binding="true" can-attach-label="false">
- <default-constraints vsize-policy="0" hsize-policy="6" anchor="0" fill="1" />
- </item>
- <item class="javax.swing.JToolBar" icon="/com/intellij/uiDesigner/icons/toolbar.png" removable="false" auto-create-binding="false" can-attach-label="false">
- <default-constraints vsize-policy="0" hsize-policy="6" anchor="0" fill="1">
- <preferred-size width="-1" height="20" />
- </default-constraints>
- </item>
- <item class="javax.swing.JToolBar$Separator" icon="/com/intellij/uiDesigner/icons/toolbarSeparator.png" removable="false" auto-create-binding="false" can-attach-label="false">
- <default-constraints vsize-policy="0" hsize-policy="0" anchor="0" fill="1" />
- </item>
- <item class="javax.swing.JScrollBar" icon="/com/intellij/uiDesigner/icons/scrollbar.png" removable="false" auto-create-binding="true" can-attach-label="false">
- <default-constraints vsize-policy="6" hsize-policy="0" anchor="0" fill="2" />
- </item>
- </group>
- </component>
-</project> \ No newline at end of file
diff --git a/code/Interpreter2/.idea/vcs.xml b/code/Interpreter2/.idea/vcs.xml
deleted file mode 100644
index b2bdec2..0000000
--- a/code/Interpreter2/.idea/vcs.xml
+++ /dev/null
@@ -1,6 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
- <component name="VcsDirectoryMappings">
- <mapping directory="$PROJECT_DIR$/../.." vcs="Git" />
- </component>
-</project> \ No newline at end of file
diff --git a/code/Interpreter2/.idea/workspace.xml b/code/Interpreter2/.idea/workspace.xml
deleted file mode 100644
index f00309a..0000000
--- a/code/Interpreter2/.idea/workspace.xml
+++ /dev/null
@@ -1,69 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
- <component name="ChangeListManager">
- <list default="true" id="d53ed2ac-d387-4e72-b30b-e936be78d097" name="Default Changelist" comment="" />
- <option name="SHOW_DIALOG" value="false" />
- <option name="HIGHLIGHT_CONFLICTS" value="true" />
- <option name="HIGHLIGHT_NON_ACTIVE_CHANGELIST" value="false" />
- <option name="LAST_RESOLUTION" value="IGNORE" />
- </component>
- <component name="Git.Settings">
- <option name="RECENT_GIT_ROOT_PATH" value="$PROJECT_DIR$/../.." />
- </component>
- <component name="ProjectId" id="20PtUsPCm3Avx9BljmzQRhs1xbs" />
- <component name="ProjectLevelVcsManager" settingsEditedManually="true" />
- <component name="ProjectViewState">
- <option name="hideEmptyMiddlePackages" value="true" />
- <option name="showLibraryContents" value="true" />
- </component>
- <component name="PropertiesComponent">
- <property name="RunOnceActivity.OpenProjectViewOnStart" value="true" />
- </component>
- <component name="RunManager">
- <configuration name="Language" type="Application" factoryName="Application">
- <option name="MAIN_CLASS_NAME" value="Interpreter.Language" />
- <module name="Interpreter2" />
- <option name="PROGRAM_PARAMETERS" value="example.txt" />
- <method v="2">
- <option name="Make" enabled="true" />
- </method>
- </configuration>
- </component>
- <component name="SpellCheckerSettings" RuntimeDictionaries="0" Folders="0" CustomDictionaries="0" DefaultDictionary="application-level" UseSingleDictionary="true" transferred="true" />
- <component name="TaskManager">
- <task active="true" id="Default" summary="Default task">
- <changelist id="d53ed2ac-d387-4e72-b30b-e936be78d097" name="Default Changelist" comment="" />
- <created>1635958069096</created>
- <option name="number" value="Default" />
- <option name="presentableId" value="Default" />
- <updated>1635958069096</updated>
- </task>
- <servers />
- </component>
- <component name="WindowStateProjectService">
- <state x="623" y="181" width="1092" height="714" key="#com.intellij.execution.impl.EditConfigurationsDialog" timestamp="1635958679737">
- <screen x="0" y="0" width="1920" height="1050" />
- </state>
- <state x="623" y="181" width="1092" height="714" key="#com.intellij.execution.impl.EditConfigurationsDialog/0.0.1920.1050/-1920.0.1920.1050@0.0.1920.1050" timestamp="1635958679737" />
- <state x="689" y="327" key="#com.intellij.ide.util.TreeClassChooserDialog" timestamp="1635958256418">
- <screen x="0" y="0" width="1920" height="1050" />
- </state>
- <state x="689" y="327" key="#com.intellij.ide.util.TreeClassChooserDialog/0.0.1920.1050/-1920.0.1920.1050@0.0.1920.1050" timestamp="1635958256418" />
- <state width="1877" height="177" key="GridCell.Tab.0.bottom" timestamp="1635959349993">
- <screen x="0" y="0" width="1920" height="1050" />
- </state>
- <state width="1877" height="177" key="GridCell.Tab.0.bottom/0.0.1920.1050/-1920.0.1920.1050@0.0.1920.1050" timestamp="1635959349993" />
- <state width="1877" height="177" key="GridCell.Tab.0.center" timestamp="1635959349992">
- <screen x="0" y="0" width="1920" height="1050" />
- </state>
- <state width="1877" height="177" key="GridCell.Tab.0.center/0.0.1920.1050/-1920.0.1920.1050@0.0.1920.1050" timestamp="1635959349992" />
- <state width="1877" height="177" key="GridCell.Tab.0.left" timestamp="1635959349992">
- <screen x="0" y="0" width="1920" height="1050" />
- </state>
- <state width="1877" height="177" key="GridCell.Tab.0.left/0.0.1920.1050/-1920.0.1920.1050@0.0.1920.1050" timestamp="1635959349992" />
- <state width="1877" height="177" key="GridCell.Tab.0.right" timestamp="1635959349992">
- <screen x="0" y="0" width="1920" height="1050" />
- </state>
- <state width="1877" height="177" key="GridCell.Tab.0.right/0.0.1920.1050/-1920.0.1920.1050@0.0.1920.1050" timestamp="1635959349992" />
- </component>
-</project> \ No newline at end of file
diff --git a/code/Interpreter2/Interpreter2.iml b/code/Interpreter2/Interpreter2.iml
deleted file mode 100644
index c90834f..0000000
--- a/code/Interpreter2/Interpreter2.iml
+++ /dev/null
@@ -1,11 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<module type="JAVA_MODULE" version="4">
- <component name="NewModuleRootManager" inherit-compiler-output="true">
- <exclude-output />
- <content url="file://$MODULE_DIR$">
- <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
- </content>
- <orderEntry type="inheritedJdk" />
- <orderEntry type="sourceFolder" forTests="false" />
- </component>
-</module> \ No newline at end of file
diff --git a/code/Interpreter2/example.txt b/code/Interpreter2/example.txt
deleted file mode 100644
index cf6adc8..0000000
--- a/code/Interpreter2/example.txt
+++ /dev/null
@@ -1,12 +0,0 @@
-var :: a
-a=5
-a=a+1
-print a
-
-a=7
-a=a*2
-print a
-
-var :: b
-b = 10
-print a+b \ No newline at end of file
diff --git a/code/Interpreter2/src/Interpreter/Environment.java b/code/Interpreter2/src/Interpreter/Environment.java
deleted file mode 100644
index d191bde..0000000
--- a/code/Interpreter2/src/Interpreter/Environment.java
+++ /dev/null
@@ -1,30 +0,0 @@
-package Interpreter;
-
-import java.util.HashMap;
-import java.util.Map;
-
-public class Environment {
- private final Map<String,Object> variableMap = new HashMap<>();
-
- //Maybe check if variable is already defined?
- public void defineVariable(String name,Object value){
- variableMap.put(name, value);
- }
-
- public Object getVariable(String name){
- if(variableMap.containsKey(name)){
- return variableMap.get(name);
- }
- Language.displayError("Undefined Variable");
- throw new Error();
- }
-
- public void assignVariable(String name,Object value){
- if(variableMap.containsKey(name)){
- variableMap.put(name, value);
- return;
- }
- Language.displayError("Variable undefined");
- throw new Error();
- }
-}
diff --git a/code/Interpreter2/src/Interpreter/Expression.java b/code/Interpreter2/src/Interpreter/Expression.java
deleted file mode 100644
index 85ade48..0000000
--- a/code/Interpreter2/src/Interpreter/Expression.java
+++ /dev/null
@@ -1,84 +0,0 @@
-package Interpreter;
-
-abstract class Expression {
- static class Binary extends Expression{
-
- final Expression left;
- final Expression right;
- final Token op;
-
- Binary(Expression left, Token op, Expression right){
- this.left=left;
- this.op=op;
- this.right = right;
- }
-
- @Override
- public String getExpressionType() {
- return "binary";
- }
-
- }
-
- static class Literal extends Expression{
- final Token value;
-
- Literal(Token value){
- this.value=value;
- }
-
-
- @Override
- public String getExpressionType() {
- return "literal";
- }
-
- }
-
- static class BracketedExpression extends Expression{
- final Expression expr;
-
- BracketedExpression(Expression expr){
- this.expr=expr;
- }
-
- @Override
- public String getExpressionType() {
- return "bracket";
- }
-
-
- }
-
- static class AssignmentExpression extends Expression{
- final Token name;
- final Expression value;
-
- AssignmentExpression(Token name,Expression value){
- this.name=name;
- this.value=value;
- }
-
-
- @Override
- public String getExpressionType() {
- return "assign";
- }
-
- }
-
- static class Variable extends Expression{
-
- Variable(Token name){
- this.name=name;
-
- }
- @Override
- public String getExpressionType() {
- return "var";
- }
- final Token name;
-
- }
- public abstract String getExpressionType();
-}
diff --git a/code/Interpreter2/src/Interpreter/Interpreter.java b/code/Interpreter2/src/Interpreter/Interpreter.java
deleted file mode 100644
index 65cdeb4..0000000
--- a/code/Interpreter2/src/Interpreter/Interpreter.java
+++ /dev/null
@@ -1,131 +0,0 @@
-package Interpreter;
-
-import java.util.List;
-
-import Interpreter.Expression.*;
-import Interpreter.Statement.ExpressionStatement;
-import Interpreter.Statement.PrintStatement;
-import Interpreter.Statement.VariableDeclaration;
-
-public class Interpreter {
-
- private Environment environment = new Environment();
-
- void interpret(List<Statement> statements){
- try{
- for (Statement statement: statements){
- evaluateStatement(statement);
- }
- } catch (Error e){
-
- }
- }
-
- private Object evaluateStatement(Statement statement){
- switch(statement.getStatmentType()){
- case "exprStmt":
- return evalExpressionStatement((ExpressionStatement)statement);
- case "vardec":
- return evalVariableDeclaration((VariableDeclaration)statement);
- case "print":
- return evalPrintStatement((PrintStatement)statement);
- default:
- return null;
- }
- }
- private Object evalExpressionStatement(ExpressionStatement stmt){
- return evaluateExpression(stmt.expr);
- }
-
- private Object evalVariableDeclaration(VariableDeclaration vardec){
- environment.defineVariable(vardec.name.text, null);
- return null;
- }
-
- private Object evalPrintStatement(PrintStatement print){
- System.out.println(evaluateExpression(print.expr));
- return null;
- }
-
- private Object evaluateExpression(Expression expression){
- switch(expression.getExpressionType()){
- case "binary":
- return evaluateBinaryExpression((Binary)expression);
- case "literal":
- return evaluateLiteralExpression((Literal)expression);
- case "bracket":
- return evaluateBracketedExpression((BracketedExpression)expression);
- case "assign":
- return evaluateAssignmentExpression((AssignmentExpression)expression);
- case "var":
- return evaluateVariableExpression((Variable)expression);
- default:
- return null;
- }
- }
-
- private Object evaluateBinaryExpression(Binary expr){
- Object leftEval = evaluateExpression(expr.left);
- Object rightEval = evaluateExpression(expr.right);
- switch (expr.op.type){
- case PLUS:
- if (checkOperandsNum(leftEval, leftEval)){
- return (double)leftEval + (double)rightEval;
- }
- case STAR:
- if (checkOperandsNum(leftEval, leftEval)){
- return (double)leftEval * (double)rightEval;
- }
- case MINUS:
- if (checkOperandsNum(leftEval, leftEval)){
- return (double)leftEval - (double)rightEval;
- }
- case SLASH:
- if (checkOperandsNum(leftEval, leftEval)){
- return (double)leftEval / (double)rightEval;
- }
-
- case GREATER:
- if (checkOperandsNum(leftEval, leftEval)){
- return (double)leftEval > (double)rightEval;
- }
- case LESS:
- if (checkOperandsNum(leftEval, leftEval)){
- return (double)leftEval < (double)rightEval;
- }
-
- case EQUALITY:
- return leftEval.equals(rightEval);
- default:
- break;
- }
- return null;
- }
-
- private Object evaluateLiteralExpression(Literal expr){
- return expr.value.value;
- }
-
- private Object evaluateBracketedExpression(BracketedExpression expr){
- return evaluateExpression(expr.expr);
- }
-
- private Object evaluateAssignmentExpression(AssignmentExpression expr){
- Object assignedValue = evaluateExpression(expr.value);
- environment.assignVariable(expr.name.text, assignedValue);
- return null;
- }
-
- private Object evaluateVariableExpression(Variable expr){
- return environment.getVariable(expr.name.text);
- }
-
- private boolean checkOperandsNum(Object left, Object right){
- if (left instanceof Double && right instanceof Double){
- return true;
- } else {
- Language.displayError("Operands must be numbers");
- throw new Error();
- }
- }
-}
diff --git a/code/Interpreter2/src/Interpreter/Language.java b/code/Interpreter2/src/Interpreter/Language.java
deleted file mode 100644
index 80aa1e3..0000000
--- a/code/Interpreter2/src/Interpreter/Language.java
+++ /dev/null
@@ -1,63 +0,0 @@
-package Interpreter;
-
-import java.io.IOException;
-import java.nio.file.Files;
-import java.nio.file.Paths;
-import java.util.List;
-import java.util.Scanner;
-
-//Base class for the interpreter
-public class Language {
- static boolean hadError = false;
- public static void main(String[] args){
-
- //Allow users to input a single line of code
- //Still needs some work to re-ask for input after each line
- if (args.length < 1){
- Scanner input = new Scanner(System.in);
- String sourceCode = "1";
- while (sourceCode!=""){
- System.out.print("Code: ");
- sourceCode = input.nextLine();
- runInterpreter(sourceCode);
- hadError=false;
- }
- input.close();
-
- //Allow users to provide a path to a file as an argument
- } else if (args.length==1){
- try {
- String sourcecode = Files.readString(Paths.get(args[0])); //Maybe should set charset here
- runInterpreter(sourcecode);
- } catch (IOException exception){
- System.out.println("File not found");
- }
-
- } else {
- System.out.println("Error, argument should be file path");
- System.exit(64);
- }
- }
-
- //Extract and print each token
- private static void runInterpreter(String sourceCode){
- TokenScanner scanner = new TokenScanner();
- List<Token> tokens = scanner.extractTokens(sourceCode);
- //for (Token token : tokens) {
- // System.out.println(token);
- //}
- if (hadError) return;
- //Parse into AST
- Parser parser = new Parser(tokens);
- List<Statement> ast = parser.parse();
- if (hadError) return;
- Interpreter interpreter = new Interpreter();
- interpreter.interpret(ast);
- }
-
- static void displayError(String message){
- hadError=true;
- System.out.println("An error was encountered");
- System.out.println(message);
- }
-}
diff --git a/code/Interpreter2/src/Interpreter/Parser.java b/code/Interpreter2/src/Interpreter/Parser.java
deleted file mode 100644
index 6b55299..0000000
--- a/code/Interpreter2/src/Interpreter/Parser.java
+++ /dev/null
@@ -1,179 +0,0 @@
-package Interpreter;
-
-import java.util.ArrayList;
-import java.util.List;
-
-public class Parser {
- private final List<Token> tokens;
- private int currentToken = 0;
-
- Parser(List<Token> tokens){
- this.tokens=tokens;
- }
-
- List<Statement> parse(){
- List<Statement> statements = new ArrayList<>();
- while (!checkEOF()){
- statements.add(declaration());
- }
- return statements;
-
- }
-
- private Statement declaration(){
- try{
- if (matchAndAdvance(TokenType.VAR)){
- if (matchOrError(TokenType.DEFINE, ":: Required for variable definition")){
- if (matchOrError(TokenType.IDENTIFIER,"Expected variable name.")){
- Token varName = getPreviousToken();
- return new Statement.VariableDeclaration(varName);
- }
- }
- }
- return statement();
- } catch (Error e){
- currentToken++;
- return null;
- }
- }
-
- private Statement statement(){
- if (matchAndAdvance(TokenType.PRINT)){
- Expression expression = expression();
- return new Statement.PrintStatement(expression);
- }
- return expressionStatement();
- }
-
-
-
- private Statement expressionStatement(){
- Expression expression = assignment();
- return new Statement.ExpressionStatement(expression);
- }
-
- private Expression assignment(){
- Expression variable = expression();
- if (matchAndAdvance(TokenType.EQUALS)){
- Expression assignedvalue = expression();
-
- if (variable instanceof Expression.Variable){
- return new Expression.AssignmentExpression(((Expression.Variable)variable).name,assignedvalue);
- }
- throw error("Incorrect assignment operation");
- }
- return variable;
- }
-
- private Expression expression(){
- Expression createdExpression = equality();
- return createdExpression;
- }
-
- private Expression equality(){
- Expression createdExpression = comparison();
- while (matchAndAdvance(TokenType.EQUALITY)){
- Token op = getPreviousToken();
- Expression right = comparison();
- createdExpression = new Expression.Binary(createdExpression, op, right);
- }
- return createdExpression;
- }
-
- private Expression comparison(){
- Expression createdExpression = term();
- while (matchAndAdvance(TokenType.GREATER)||matchAndAdvance(TokenType.LESS)){
- Token op = getPreviousToken();
- Expression right = term();
- createdExpression = new Expression.Binary(createdExpression, op, right);
- }
- return createdExpression;
- }
-
- private Expression term(){
- Expression createdExpression = factor();
- while (matchAndAdvance(TokenType.PLUS)||matchAndAdvance(TokenType.MINUS)){
- Token op = getPreviousToken();
- Expression right = factor();
- createdExpression = new Expression.Binary(createdExpression, op, right);
- }
- return createdExpression;
- }
-
- private Expression factor(){
- Expression createdExpression = primary();
- while (matchAndAdvance(TokenType.STAR)||matchAndAdvance(TokenType.SLASH)){
- Token op = getPreviousToken();
- Expression right = primary();
- createdExpression = new Expression.Binary(createdExpression, op, right);
- }
- return createdExpression;
- }
-
- private Expression primary(){
- if (matchAndAdvance(TokenType.NUMBER)){
- return new Expression.Literal(getPreviousToken());
- }
-
- if (matchAndAdvance(TokenType.IDENTIFIER)) {
-
- return new Expression.Variable(getPreviousToken());
- }
-
- if (matchAndAdvance(TokenType.LEFT_PAREN)){
- Expression expr = expression();
- if (matchAndAdvance(TokenType.RIGHT_PAREN)){
- return new Expression.BracketedExpression(expr);
- }
- else{
- throw error("Expected ')");
- }
- }
- throw error("Expected Expression");
- }
-
- private void advanceToken(){
- if (!checkEOF()) {
- currentToken++;
- };
- }
-
- private boolean matchAndAdvance(TokenType type){
- if (checkToken(type)) {
- advanceToken();
- return true;
- }
- return false;
- }
-
- private boolean matchOrError(TokenType type,String errorMessage){
- if (matchAndAdvance(type)){
- return true;
- }
- throw error(errorMessage);
- }
-
- private boolean checkToken(TokenType type){
- if (checkEOF()) return false;
- return getCurrentToken().type == type;
- }
-
- private boolean checkEOF(){
- return tokens.get(currentToken).type==TokenType.EOF;
- }
-
- private Token getCurrentToken(){
- return tokens.get(currentToken);
- }
-
- private Token getPreviousToken(){
- return tokens.get(currentToken - 1);
- }
-
- private Error error(String message){
- Language.displayError(message);
- return new Error();
- }
-
-
-}
diff --git a/code/Interpreter2/src/Interpreter/Statement.java b/code/Interpreter2/src/Interpreter/Statement.java
deleted file mode 100644
index 5a9aef7..0000000
--- a/code/Interpreter2/src/Interpreter/Statement.java
+++ /dev/null
@@ -1,49 +0,0 @@
-package Interpreter;
-
-abstract class Statement {
-
- static class ExpressionStatement extends Statement{
- ExpressionStatement(Expression expr){
- this.expr = expr;
- }
-
-
- final Expression expr;
-
- @Override
- public String getStatmentType() {
- return "exprStmt";
- }
- }
-
-
- static class VariableDeclaration extends Statement{
- VariableDeclaration(Token name){
- this.name=name;
- }
-
-
- final Token name;
-
- @Override
- public String getStatmentType() {
- return "vardec";
- }
-
- }
-
- static class PrintStatement extends Statement{
- PrintStatement(Expression expr){
- this.expr=expr;
- }
- final Expression expr;
-
- @Override
- public String getStatmentType() {
- return "print";
- }
- }
-
-
- public abstract String getStatmentType();
-}
diff --git a/code/Interpreter2/src/Interpreter/Token.java b/code/Interpreter2/src/Interpreter/Token.java
deleted file mode 100644
index 0129b78..0000000
--- a/code/Interpreter2/src/Interpreter/Token.java
+++ /dev/null
@@ -1,23 +0,0 @@
-package Interpreter;
-
-public class Token {
-
-
- //Stores the token type, the actual text and the runtime object
- public final TokenType type;
- final String text;
- final Object value;
-
-
- Token(TokenType type, String text, Object value){
- this.type=type;
- this.text=text;
- this.value=value;
-
- }
-
- @Override
- public String toString() {
- return type + " " + text + " " + value;
- }
-}
diff --git a/code/Interpreter2/src/Interpreter/TokenScanner.java b/code/Interpreter2/src/Interpreter/TokenScanner.java
deleted file mode 100644
index c9249a4..0000000
--- a/code/Interpreter2/src/Interpreter/TokenScanner.java
+++ /dev/null
@@ -1,179 +0,0 @@
-package Interpreter;
-
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-
-public class TokenScanner {
- private String sourceCode;
- List<Token> tokens = new ArrayList<>();
- private int tokenStart=0;
- private int currentLoc=0;
-
- //Extract tokens from the source code by reading character by character
- List<Token> extractTokens(String sourceCode){
- this.sourceCode=sourceCode;
- while (!checkEOF()){
- tokenStart=currentLoc;
- readToken();
- }
- tokens.add(new Token(TokenType.EOF, "", null));
- return tokens;
- }
-
- //Extract a single token
- private void readToken(){
- char checkChar = sourceCode.charAt(currentLoc);
- switch(checkChar){
-
- case ' ':break;
- case '\n':break;
- case '\r':break;
- case '\t':
- break;
-
- case '(': createTokenNull(TokenType.LEFT_PAREN); break;
- case ')': createTokenNull(TokenType.RIGHT_PAREN); break;
- case '+': createTokenNull(TokenType.PLUS); break;
- case '-': createTokenNull(TokenType.MINUS); break;
- case '*': createTokenNull(TokenType.STAR); break;
- case '/': createTokenNull(TokenType.SLASH); break;
- case ';': createTokenNull(TokenType.SEMI_COLON); break;
-
- //Some tokens are multiple characters long (==, <=) etc
- //so need to check next char as well
- case '=':
- if (checkNextChar('=')){
- createTokenNull(TokenType.EQUALITY);
- break;
- } else {
- createTokenNull(TokenType.EQUALS);
- break;
- }
- case ':':
- if (checkNextChar(':')){
- createTokenNull(TokenType.DEFINE);
- break;
- } else {
- createTokenNull(TokenType.COLON);
- break;
- }
- case '<':
- if (checkNextChar('=')){
- createTokenNull(TokenType.LESS_EQUAL);
- break;
- } else {
- createTokenNull(TokenType.LESS);
- break;
- }
- case '>':
- if (checkNextChar('=')){
- createTokenNull(TokenType.GREATER_EQUAL);
- break;
- } else {
- createTokenNull(TokenType.GREATER);
- break;
- }
- default:
-
- //Check for numer
- if (checkIsDigit(checkChar)){
- while (checkIsDigit(lookAhead())){
- currentLoc++;
- }
- //Check if number contains a decimal point
- if (lookAhead()=='.' && checkIsDigit(lookTwoAhead())){
- currentLoc++;
- while (checkIsDigit(lookAhead())){
- currentLoc++;
- }
- }
- createToken(TokenType.NUMBER, Double.parseDouble(sourceCode.substring(tokenStart, currentLoc+1)));
- }
- else if (checkIsAlpha(checkChar)){
- while (checkIsAlpha(lookAhead())){
- currentLoc++;
- }
- String text = sourceCode.substring(tokenStart, currentLoc+1);
- TokenType type = keywords.get(text);
- if(type == null){
- createToken(TokenType.IDENTIFIER, text);
- } else{
- createToken(type, text);
- }
-
- } else {
- Language.displayError("Unexpected Character");
- }
- }
- currentLoc++;
-
- }
-
- //Test for end of file
- private boolean checkEOF(){
- return currentLoc>=sourceCode.length();
- }
-
- //Create a token without a value
- private void createTokenNull(TokenType type){
- createToken(type, null);
- }
-
- //Create token
- private void createToken(TokenType type, Object value){
- String tokenText = sourceCode.substring(tokenStart, currentLoc+1);
- tokens.add(new Token(type, tokenText, value));
- }
-
- //Check if the next char matches a given char
- private boolean checkNextChar(char matchChar){
- if (checkEOF()){
- return false;
- }
- if (sourceCode.charAt(currentLoc+1)==matchChar){
- currentLoc++;
- return true;
- }
- return false;
- }
-
- //Look at the next char in the source code
- private char lookAhead(){
- if (currentLoc+1>=sourceCode.length()){
- return ' ';
-
- } else {
- return sourceCode.charAt(currentLoc+1);
- }
- }
-
- //Look 2 chars ahead in the source code
- private char lookTwoAhead(){
- if (currentLoc+2>=sourceCode.length()){
- return ' ';
-
- } else {
- return sourceCode.charAt(currentLoc+2);
- }
- }
-
- //Check if a given char is a digit
- private boolean checkIsDigit(char checkChar){
- return checkChar>='0' && checkChar<='9';
- }
-
- private boolean checkIsAlpha(char checkChar){
- return ('a'<=checkChar && checkChar<='z')||
- ('A'<=checkChar && checkChar<='Z');
- }
-
- private static final Map<String, TokenType> keywords;
-
- static {
- keywords = new HashMap<>();
- keywords.put("var", TokenType.VAR);
- keywords.put("print", TokenType.PRINT);
- }
-}
diff --git a/code/Interpreter2/src/Interpreter/TokenType.java b/code/Interpreter2/src/Interpreter/TokenType.java
deleted file mode 100644
index 756fab6..0000000
--- a/code/Interpreter2/src/Interpreter/TokenType.java
+++ /dev/null
@@ -1,17 +0,0 @@
-package Interpreter;
-
-public enum TokenType {
- EQUALS, LEFT_PAREN, RIGHT_PAREN,
- PLUS, MINUS, SLASH, STAR, SEMI_COLON,
- COLON,
-
- EQUALITY, GREATER, LESS,
- GREATER_EQUAL, LESS_EQUAL,
- DEFINE,
-
- NUMBER,IDENTIFIER,
-
- VAR,PRINT,
-
- EOF
-}