Added Parser
- can parse a basic token list to an AST
This commit is contained in:
Clemens-Dautermann
parent
ea26acce4a
commit
b3fe78fffb
19 changed files with 451 additions and 88 deletions
19
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<state width="908" height="383" key="GridCell.Tab.3.bottom/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1597525905670" />
|
||||
<state width="908" height="383" key="GridCell.Tab.3.center" timestamp="1597525905670">
|
||||
<state width="1868" height="383" key="GridCell.Tab.3.bottom/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1597619266025" />
|
||||
<state width="1868" height="383" key="GridCell.Tab.3.center" timestamp="1597619266025">
|
||||
<screen x="1920" y="0" width="1920" height="1080" />
|
||||
</state>
|
||||
<state width="908" height="383" key="GridCell.Tab.3.center/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1597525905670" />
|
||||
<state width="908" height="383" key="GridCell.Tab.3.left" timestamp="1597525905670">
|
||||
<state width="1868" height="383" key="GridCell.Tab.3.center/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1597619266025" />
|
||||
<state width="1868" height="383" key="GridCell.Tab.3.left" timestamp="1597619266025">
|
||||
<screen x="1920" y="0" width="1920" height="1080" />
|
||||
</state>
|
||||
<state width="908" height="383" key="GridCell.Tab.3.left/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1597525905670" />
|
||||
<state width="908" height="383" key="GridCell.Tab.3.right" timestamp="1597525905670">
|
||||
<state width="1868" height="383" key="GridCell.Tab.3.left/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1597619266025" />
|
||||
<state width="1868" height="383" key="GridCell.Tab.3.right" timestamp="1597619266025">
|
||||
<screen x="1920" y="0" width="1920" height="1080" />
|
||||
</state>
|
||||
<state width="908" height="383" key="GridCell.Tab.3.right/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1597525905670" />
|
||||
<state width="908" height="383" key="GridCell.Tab.4.bottom" timestamp="1597525905670">
|
||||
<state width="1868" height="383" key="GridCell.Tab.3.right/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1597619266025" />
|
||||
<state width="1868" height="383" key="GridCell.Tab.4.bottom" timestamp="1597619266025">
|
||||
<screen x="1920" y="0" width="1920" height="1080" />
|
||||
</state>
|
||||
<state width="908" height="383" key="GridCell.Tab.4.bottom/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1597525905670" />
|
||||
<state width="908" height="383" key="GridCell.Tab.4.center" timestamp="1597525905670">
|
||||
<state width="1868" height="383" key="GridCell.Tab.4.bottom/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1597619266025" />
|
||||
<state width="1868" height="383" key="GridCell.Tab.4.center" timestamp="1597619266025">
|
||||
<screen x="1920" y="0" width="1920" height="1080" />
|
||||
</state>
|
||||
<state width="908" height="383" key="GridCell.Tab.4.center/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1597525905670" />
|
||||
<state width="908" height="383" key="GridCell.Tab.4.left" timestamp="1597525905670">
|
||||
<state width="1868" height="383" key="GridCell.Tab.4.center/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1597619266025" />
|
||||
<state width="1868" height="383" key="GridCell.Tab.4.left" timestamp="1597619266025">
|
||||
<screen x="1920" y="0" width="1920" height="1080" />
|
||||
</state>
|
||||
<state width="908" height="383" key="GridCell.Tab.4.left/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1597525905670" />
|
||||
<state width="908" height="383" key="GridCell.Tab.4.right" timestamp="1597525905670">
|
||||
<state width="1868" height="383" key="GridCell.Tab.4.left/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1597619266025" />
|
||||
<state width="1868" height="383" key="GridCell.Tab.4.right" timestamp="1597619266025">
|
||||
<screen x="1920" y="0" width="1920" height="1080" />
|
||||
</state>
|
||||
<state width="908" height="383" key="GridCell.Tab.4.right/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1597525905670" />
|
||||
<state width="1868" height="383" key="GridCell.Tab.4.right/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1597619266025" />
|
||||
<state x="1989" y="220" width="806" height="524" key="Rider.ProjectTemplateDialog.Size" timestamp="1597507532464">
|
||||
<screen x="1920" y="0" width="1920" height="1080" />
|
||||
</state>
|
||||
<state x="1989" y="220" width="806" height="524" key="Rider.ProjectTemplateDialog.Size/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1597507532464" />
|
||||
<state x="2161" y="167" width="474" height="713" key="RiderGenerateDialog" timestamp="1597510130230">
|
||||
<state x="2345" y="104" width="709" height="485" key="RiderGenerateDialog" timestamp="1597619025064">
|
||||
<screen x="1920" y="0" width="1920" height="1080" />
|
||||
</state>
|
||||
<state x="2161" y="167" width="474" height="713" key="RiderGenerateDialog/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1597510130230" />
|
||||
<state x="2345" y="104" width="709" height="485" key="RiderGenerateDialog/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1597619025064" />
|
||||
<state x="886" y="141" width="1031" height="724" key="SettingsEditor" timestamp="1597520511080">
|
||||
<screen x="0" y="0" width="1920" height="1080" />
|
||||
</state>
|
||||
<state x="886" y="141" width="1031" height="724" key="SettingsEditor/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1597520511080" />
|
||||
<state x="2560" y="0" width="640" height="1080" key="VCS.FileHistoryDialog" timestamp="1597605666894">
|
||||
<screen x="1920" y="0" width="1920" height="1080" />
|
||||
</state>
|
||||
<state x="2560" y="0" width="640" height="1080" key="VCS.FileHistoryDialog/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1597605666894" />
|
||||
<state width="480" height="540" key="XDebugger.FullValuePopup" timestamp="1597525606220">
|
||||
<screen x="1920" y="0" width="1920" height="1080" />
|
||||
</state>
|
||||
|
|
@ -260,5 +297,13 @@
|
|||
<screen x="1920" y="0" width="1920" height="1080" />
|
||||
</state>
|
||||
<state x="2182" y="199" width="432" height="650" key="com.intellij.openapi.editor.actions.MultiplePasteAction$ClipboardContentChooser/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1597510086756" />
|
||||
<state x="960" y="557" width="960" height="523" key="dock-window-1" timestamp="1597606916274">
|
||||
<screen x="0" y="0" width="1920" height="1080" />
|
||||
</state>
|
||||
<state x="960" y="557" width="960" height="523" key="dock-window-1/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1597606916274" />
|
||||
<state x="960" y="34" width="960" height="523" key="dock-window-2" timestamp="1597606916274">
|
||||
<screen x="0" y="0" width="1920" height="1080" />
|
||||
</state>
|
||||
<state x="960" y="34" width="960" height="523" key="dock-window-2/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1597606916274" />
|
||||
</component>
|
||||
</project>
|
||||
|
|
@ -1,6 +1,8 @@
|
|||
using System;
|
||||
using System.Collections.Generic;
|
||||
using System.IO;
|
||||
using Compiler.Lexer;
|
||||
using Compiler.Parser;
|
||||
|
||||
namespace Compiler
|
||||
{
|
||||
|
|
@ -8,14 +10,18 @@ namespace Compiler
|
|||
{
|
||||
public static void Main()
|
||||
{
|
||||
TestCompiler("../../../../tests/week_1/valid");
|
||||
TestCompiler("../../../../tests/week_1/invalid");
|
||||
List<List<Token>> tokensValid = TestLexer("../../../../tests/week_1/valid");
|
||||
List<List<Token>> tokensInvalid = TestLexer("../../../../tests/week_1/invalid");
|
||||
|
||||
TestParser(tokensValid[0]);
|
||||
TestParser(tokensInvalid[0]);
|
||||
}
|
||||
|
||||
static void TestCompiler(String path)
|
||||
static List<List<Token>> TestLexer(String path)
|
||||
{
|
||||
List<List<Token>> tokenLists = new List<List<Token>>();
|
||||
String[] files = Directory.GetFiles(path);
|
||||
Lexer lexer = new Lexer();
|
||||
Lexer.Lexer lexer = new Lexer.Lexer();
|
||||
|
||||
foreach (String filename in files)
|
||||
{
|
||||
|
|
@ -23,14 +29,25 @@ namespace Compiler
|
|||
String contents = file.ReadToEnd();
|
||||
|
||||
List<Token> tokens = lexer.Lex(contents);
|
||||
tokenLists.Add(tokens);
|
||||
|
||||
Console.WriteLine("-----------" + filename + "-----------");
|
||||
foreach (Token token in tokens)
|
||||
{
|
||||
Console.WriteLine(token.ToString());
|
||||
}
|
||||
|
||||
Console.WriteLine("--------------------------------------");
|
||||
}
|
||||
|
||||
return tokenLists;
|
||||
}
|
||||
|
||||
static void TestParser(List<Token> tokenList)
|
||||
{
|
||||
Parser.Parser p = new Parser.Parser();
|
||||
|
||||
p.Parse(ref tokenList, NodeType.ProgramNode);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
@ -2,7 +2,7 @@
|
|||
using System.Collections.Generic;
|
||||
using System.Text.RegularExpressions;
|
||||
|
||||
namespace Compiler
|
||||
namespace Compiler.Lexer
|
||||
{
|
||||
class Lexer
|
||||
{
|
||||
|
|
@ -70,7 +70,8 @@ namespace Compiler
|
|||
switch (pattern.GetTokenType())
|
||||
{
|
||||
case TokenType.IntegerLiteralToken:
|
||||
t.Value = m.Value;
|
||||
//TODO: Error handling is missing here
|
||||
t.Value = Int32.Parse(m.Value);
|
||||
break;
|
||||
case TokenType.IdentifierToken:
|
||||
t.Value = m.Value;
|
||||
|
|
@ -91,6 +92,7 @@ namespace Compiler
|
|||
return t;
|
||||
}
|
||||
}
|
||||
|
||||
//return the next token
|
||||
return new Token(TokenType.InvalidToken);
|
||||
}
|
||||
|
|
@ -1,7 +1,7 @@
|
|||
using System;
|
||||
using System.Text.RegularExpressions;
|
||||
|
||||
namespace Compiler
|
||||
namespace Compiler.Lexer
|
||||
{
|
||||
public class Pattern
|
||||
{
|
||||
|
|
@ -1,11 +1,12 @@
|
|||
using System;
|
||||
using System.Linq.Expressions;
|
||||
|
||||
namespace Compiler
|
||||
namespace Compiler.Lexer
|
||||
{
|
||||
public class Token
|
||||
{
|
||||
public TokenType TokenType { get; set; }
|
||||
public String Value { get; set; }
|
||||
public Object Value { get; set; }
|
||||
public int Length { get; set; }
|
||||
|
||||
public Token(TokenType pTokenType)
|
||||
|
|
@ -1,4 +1,4 @@
|
|||
namespace Compiler
|
||||
namespace Compiler.Lexer
|
||||
{
|
||||
public enum TokenType
|
||||
{
|
||||
17
Compiler/Parser/Exceptions/InvalidIdentifierException.cs
Normal file
17
Compiler/Parser/Exceptions/InvalidIdentifierException.cs
Normal file
|
|
@ -0,0 +1,17 @@
|
|||
using System;
|
||||
|
||||
namespace Compiler.Parser.Exceptions
|
||||
{
|
||||
public class InvalidIdentifierException : Exception
|
||||
{
|
||||
private string value { get; set; }
|
||||
|
||||
public override string Message { get; }
|
||||
|
||||
public InvalidIdentifierException(string value)
|
||||
{
|
||||
this.value = value;
|
||||
this.Message = "Unexpected Identifier " + this.value + ".";
|
||||
}
|
||||
}
|
||||
}
|
||||
9
Compiler/Parser/Exceptions/MissingSemicolonException.cs
Normal file
9
Compiler/Parser/Exceptions/MissingSemicolonException.cs
Normal file
|
|
@ -0,0 +1,9 @@
|
|||
using System;
|
||||
|
||||
namespace Compiler.Parser.Exceptions
|
||||
{
|
||||
public class MissingSemicolonException : Exception
|
||||
{
|
||||
public override string Message { get; }
|
||||
}
|
||||
}
|
||||
20
Compiler/Parser/Exceptions/UnexpectedTokenException.cs
Normal file
20
Compiler/Parser/Exceptions/UnexpectedTokenException.cs
Normal file
|
|
@ -0,0 +1,20 @@
|
|||
using System;
|
||||
using Compiler.Lexer;
|
||||
|
||||
namespace Compiler.Parser.Exceptions
|
||||
{
|
||||
public class UnexpectedTokenException : Exception
|
||||
{
|
||||
public TokenType expected { get; set; }
|
||||
public TokenType got { get; set; }
|
||||
|
||||
public override string Message { get; }
|
||||
|
||||
public UnexpectedTokenException(TokenType expected, TokenType got)
|
||||
{
|
||||
this.expected = expected;
|
||||
this.got = got;
|
||||
this.Message = "Unexpected Token " + got + ". Expected: " + expected;
|
||||
}
|
||||
}
|
||||
}
|
||||
21
Compiler/Parser/Exceptions/WrongTypeException.cs
Normal file
21
Compiler/Parser/Exceptions/WrongTypeException.cs
Normal file
|
|
@ -0,0 +1,21 @@
|
|||
using System;
|
||||
|
||||
namespace Compiler.Parser.Exceptions
|
||||
{
|
||||
public class WrongTypeException : Exception
|
||||
{
|
||||
private Type expected;
|
||||
private Type got;
|
||||
|
||||
public override string Message { get; }
|
||||
|
||||
public WrongTypeException(Type expected, Type got)
|
||||
{
|
||||
this.expected = expected;
|
||||
this.got = got;
|
||||
|
||||
this.Message = "Expected type " + expected +
|
||||
"but got type " + got + ".";
|
||||
}
|
||||
}
|
||||
}
|
||||
14
Compiler/Parser/Nodes/ConstantNode.cs
Normal file
14
Compiler/Parser/Nodes/ConstantNode.cs
Normal file
|
|
@ -0,0 +1,14 @@
|
|||
namespace Compiler.Parser.Nodes
|
||||
{
|
||||
public sealed class ConstantNode : Node
|
||||
{
|
||||
public override NodeType NodeType { get; set; }
|
||||
public int value { get; set; }
|
||||
|
||||
public ConstantNode(int value)
|
||||
{
|
||||
this.NodeType = NodeType.ExpressionNode;
|
||||
this.value = value;
|
||||
}
|
||||
}
|
||||
}
|
||||
15
Compiler/Parser/Nodes/FunctionNode.cs
Normal file
15
Compiler/Parser/Nodes/FunctionNode.cs
Normal file
|
|
@ -0,0 +1,15 @@
|
|||
using System;
|
||||
|
||||
namespace Compiler.Parser.Nodes
|
||||
{
|
||||
public sealed class FunctionNode : Node
|
||||
{
|
||||
public string Name { get; set; }
|
||||
public override NodeType NodeType { get; set; }
|
||||
|
||||
public FunctionNode()
|
||||
{
|
||||
this.NodeType = NodeType.FunctionNode;
|
||||
}
|
||||
}
|
||||
}
|
||||
15
Compiler/Parser/Nodes/Node.cs
Normal file
15
Compiler/Parser/Nodes/Node.cs
Normal file
|
|
@ -0,0 +1,15 @@
|
|||
using System.Collections.Generic;
|
||||
|
||||
namespace Compiler.Parser.Nodes
|
||||
{
|
||||
public abstract class Node
|
||||
{
|
||||
public abstract NodeType NodeType { get; set; }
|
||||
public List<Node> Children { get; set; }
|
||||
|
||||
protected Node()
|
||||
{
|
||||
Children = new List<Node>();
|
||||
}
|
||||
}
|
||||
}
|
||||
10
Compiler/Parser/Nodes/NodeType.cs
Normal file
10
Compiler/Parser/Nodes/NodeType.cs
Normal file
|
|
@ -0,0 +1,10 @@
|
|||
namespace Compiler.Parser
|
||||
{
|
||||
public enum NodeType
|
||||
{
|
||||
ProgramNode,
|
||||
FunctionNode,
|
||||
StatementNode,
|
||||
ExpressionNode
|
||||
}
|
||||
}
|
||||
12
Compiler/Parser/Nodes/ProgramNode.cs
Normal file
12
Compiler/Parser/Nodes/ProgramNode.cs
Normal file
|
|
@ -0,0 +1,12 @@
|
|||
namespace Compiler.Parser.Nodes
|
||||
{
|
||||
public sealed class ProgramNode : Node
|
||||
{
|
||||
public override NodeType NodeType { get; set; }
|
||||
|
||||
public ProgramNode()
|
||||
{
|
||||
this.NodeType = NodeType.ProgramNode;
|
||||
}
|
||||
}
|
||||
}
|
||||
12
Compiler/Parser/Nodes/ReturnNode.cs
Normal file
12
Compiler/Parser/Nodes/ReturnNode.cs
Normal file
|
|
@ -0,0 +1,12 @@
|
|||
namespace Compiler.Parser.Nodes
|
||||
{
|
||||
public sealed class ReturnNode : Node
|
||||
{
|
||||
public override NodeType NodeType { get; set; }
|
||||
|
||||
public ReturnNode()
|
||||
{
|
||||
this.NodeType = NodeType.StatementNode;
|
||||
}
|
||||
}
|
||||
}
|
||||
130
Compiler/Parser/Parser.cs
Normal file
130
Compiler/Parser/Parser.cs
Normal file
|
|
@ -0,0 +1,130 @@
|
|||
using System;
|
||||
using System.Collections.Generic;
|
||||
using System.Linq;
|
||||
using Compiler.Lexer;
|
||||
using Compiler.Parser.Exceptions;
|
||||
using Compiler.Parser.Nodes;
|
||||
|
||||
namespace Compiler.Parser
|
||||
{
|
||||
public class Parser
|
||||
{
|
||||
public Node Parse(ref List<Token> tokenList, NodeType nodeType)
|
||||
{
|
||||
var t = tokenList.FirstOrDefault();
|
||||
|
||||
if (t == null) throw new Exception("Empty Token List.");
|
||||
Node n;
|
||||
switch (nodeType)
|
||||
{
|
||||
case NodeType.ProgramNode:
|
||||
n = new ProgramNode();
|
||||
|
||||
//if this node is a program node, the next one must be a function node
|
||||
Node childNode = Parse(ref tokenList, NodeType.FunctionNode);
|
||||
n.Children.Add(childNode);
|
||||
break;
|
||||
|
||||
case NodeType.FunctionNode:
|
||||
n = new FunctionNode();
|
||||
|
||||
//retrieve signature and remove it
|
||||
List<Token> signature = tokenList.GetRange(0, 5);
|
||||
tokenList.RemoveRange(0, 5);
|
||||
|
||||
//check each element of the signature and raise corresponding errors
|
||||
if (signature[0].TokenType != TokenType.IntToken)
|
||||
{
|
||||
throw new UnexpectedTokenException(TokenType.IntToken, signature[1].TokenType);
|
||||
}
|
||||
|
||||
if (signature[1].Value != null)
|
||||
{
|
||||
if (signature[1].TokenType == TokenType.IdentifierToken)
|
||||
{
|
||||
((FunctionNode) n).Name = signature[1].Value.ToString();
|
||||
}
|
||||
else
|
||||
{
|
||||
throw new UnexpectedTokenException(TokenType.IdentifierToken, signature[1].TokenType);
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
throw new InvalidIdentifierException(null);
|
||||
}
|
||||
|
||||
if (signature[2].TokenType != TokenType.OpenParenthesisToken)
|
||||
{
|
||||
throw new UnexpectedTokenException(TokenType.OpenParenthesisToken, signature[1].TokenType);
|
||||
}
|
||||
|
||||
if (signature[3].TokenType != TokenType.CloseParenthesisToken)
|
||||
{
|
||||
throw new UnexpectedTokenException(TokenType.CloseParenthesisToken, signature[1].TokenType);
|
||||
}
|
||||
|
||||
if (signature[4].TokenType != TokenType.OpenBraceToken)
|
||||
{
|
||||
throw new UnexpectedTokenException(TokenType.OpenBraceToken, signature[1].TokenType);
|
||||
}
|
||||
|
||||
//add returned child node to AST
|
||||
n.Children.Add(Parse(ref tokenList, NodeType.StatementNode));
|
||||
|
||||
//remove trailing }
|
||||
tokenList.RemoveAt(0);
|
||||
break;
|
||||
case NodeType.StatementNode:
|
||||
|
||||
//TODO: This Type of return/statement node will probably need fixing later
|
||||
n = new ReturnNode();
|
||||
|
||||
//get return token and remove it
|
||||
List<Token> returnStatement = tokenList.GetRange(0, 1);
|
||||
tokenList.RemoveAt(0);
|
||||
|
||||
if (returnStatement[0].TokenType != TokenType.ReturnToken)
|
||||
{
|
||||
throw new UnexpectedTokenException(TokenType.ReturnToken, returnStatement[0].TokenType);
|
||||
}
|
||||
else
|
||||
{
|
||||
//add returned child node to AST
|
||||
n.Children.Add(Parse(ref tokenList, NodeType.ExpressionNode));
|
||||
//remove trailing ;
|
||||
tokenList.RemoveAt(0);
|
||||
}
|
||||
|
||||
break;
|
||||
|
||||
case NodeType.ExpressionNode:
|
||||
|
||||
Token constantToken = tokenList[0];
|
||||
//check if TokenType is right
|
||||
if (constantToken.TokenType != TokenType.IntegerLiteralToken)
|
||||
{
|
||||
throw new UnexpectedTokenException(TokenType.IntToken, constantToken.TokenType);
|
||||
}
|
||||
else
|
||||
{
|
||||
//check if value Type is right
|
||||
if (constantToken.Value.GetType() != typeof(int))
|
||||
{
|
||||
throw new WrongTypeException(typeof(int), constantToken.Value.GetType());
|
||||
}
|
||||
|
||||
//return final constant node to end recursion
|
||||
n = new ConstantNode((int) constantToken.Value);
|
||||
}
|
||||
|
||||
break;
|
||||
|
||||
default:
|
||||
throw new Exception("Unknown Node Type " + nodeType);
|
||||
}
|
||||
|
||||
return n;
|
||||
}
|
||||
}
|
||||
}
|
||||
4
grammar
4
grammar
|
|
@ -0,0 +1,4 @@
|
|||
<program> ::= <function>
|
||||
<function> ::= "int" <id> "(" ")" "{" <statement> "}"
|
||||
<statement> ::= "return" <exp> ";"
|
||||
<exp> ::= <int>
|
||||
Loading…
Add table
Add a link
Reference in a new issue