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lexing and parsing unary operators

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Clemens-Dautermann 2020-08-20 17:11:43 +02:00
parent b2c2a2f497
commit 202c1d2ca2
21 changed files with 290 additions and 130 deletions
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2
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<state width="1868" height="383" key="GridCell.Tab.4.center" timestamp="1597865244688"> <state width="1868" height="383" key="GridCell.Tab.4.center" timestamp="1597872670367">
<screen x="1920" y="0" width="1920" height="1080" /> <screen x="1920" y="0" width="1920" height="1080" />
</state> </state>
<state width="1868" height="383" key="GridCell.Tab.4.center/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1597865244688" /> <state width="1868" height="383" key="GridCell.Tab.4.center/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1597872670367" />
<state width="1868" height="383" key="GridCell.Tab.4.left" timestamp="1597865244687"> <state width="1868" height="383" key="GridCell.Tab.4.left" timestamp="1597872670367">
<screen x="1920" y="0" width="1920" height="1080" /> <screen x="1920" y="0" width="1920" height="1080" />
</state> </state>
<state width="1868" height="383" key="GridCell.Tab.4.left/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1597865244687" /> <state width="1868" height="383" key="GridCell.Tab.4.left/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1597872670367" />
<state width="1868" height="383" key="GridCell.Tab.4.right" timestamp="1597865244688"> <state width="1868" height="383" key="GridCell.Tab.4.right" timestamp="1597872670367">
<screen x="1920" y="0" width="1920" height="1080" /> <screen x="1920" y="0" width="1920" height="1080" />
</state> </state>
<state width="1868" height="383" key="GridCell.Tab.4.right/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1597865244688" /> <state width="1868" height="383" key="GridCell.Tab.4.right/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1597872670367" />
<state x="631" y="291" width="806" height="524" key="Rider.ProjectTemplateDialog.Size" timestamp="1597872082099"> <state x="631" y="291" width="806" height="524" key="Rider.ProjectTemplateDialog.Size" timestamp="1597872082099">
<screen x="0" y="0" width="1920" height="1080" /> <screen x="0" y="0" width="1920" height="1080" />
</state> </state>
<state x="631" y="291" width="806" height="524" key="Rider.ProjectTemplateDialog.Size/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1597872082099" /> <state x="631" y="291" width="806" height="524" key="Rider.ProjectTemplateDialog.Size/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1597872082099" />
<state x="2336" y="41" width="709" height="485" key="RiderGenerateDialog" timestamp="1597863779733"> <state x="2333" y="20" width="709" height="485" key="RiderGenerateDialog" timestamp="1597935008077">
<screen x="1920" y="0" width="1920" height="1080" /> <screen x="1920" y="0" width="1920" height="1080" />
</state> </state>
<state x="2336" y="41" width="709" height="485" key="RiderGenerateDialog/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1597863779733" /> <state x="2333" y="20" width="709" height="485" key="RiderGenerateDialog/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1597935008077" />
<state x="2233" y="185" width="1031" height="724" key="SettingsEditor" timestamp="1597620460972"> <state x="2525" y="135" width="1031" height="724" key="SettingsEditor" timestamp="1597932248704">
<screen x="1920" y="0" width="1920" height="1080" /> <screen x="1920" y="0" width="1920" height="1080" />
</state> </state>
<state x="2233" y="185" width="1031" height="724" key="SettingsEditor/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1597620460972" /> <state x="2525" y="135" width="1031" height="724" key="SettingsEditor/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1597932248704" />
<state x="2560" y="0" width="640" height="1080" key="VCS.FileHistoryDialog" timestamp="1597605666894"> <state x="2560" y="0" width="640" height="1080" key="VCS.FileHistoryDialog" timestamp="1597605666894">
<screen x="1920" y="0" width="1920" height="1080" /> <screen x="1920" y="0" width="1920" height="1080" />
</state> </state>
@ -325,14 +328,18 @@
<screen x="1920" y="0" width="1920" height="1080" /> <screen x="1920" y="0" width="1920" height="1080" />
</state> </state>
<state x="2182" y="199" width="432" height="650" key="com.intellij.openapi.editor.actions.MultiplePasteAction$ClipboardContentChooser/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1597510086756" /> <state x="2182" y="199" width="432" height="650" key="com.intellij.openapi.editor.actions.MultiplePasteAction$ClipboardContentChooser/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1597510086756" />
<state x="960" y="34" width="960" height="1046" key="dock-window-1" timestamp="1597620461385"> <state x="2880" y="0" width="960" height="1080" key="dock-window-1" timestamp="1597934748776">
<screen x="0" y="0" width="1920" height="1080" />
</state>
<state x="960" y="34" width="960" height="1046" key="dock-window-1/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1597620461385" />
<state x="1920" y="0" width="1920" height="1080" key="dock-window-2" timestamp="1597620461385">
<screen x="1920" y="0" width="1920" height="1080" /> <screen x="1920" y="0" width="1920" height="1080" />
</state> </state>
<state x="1920" y="0" width="1920" height="1080" key="dock-window-2/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1597620461385" /> <state x="2880" y="0" width="960" height="1080" key="dock-window-1/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1597934748776" />
<state x="2880" y="0" width="960" height="1080" key="dock-window-2" timestamp="1597934748776">
<screen x="1920" y="0" width="1920" height="1080" />
</state>
<state x="2880" y="0" width="960" height="1080" key="dock-window-2/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1597934748776" />
<state x="0" y="557" width="1920" height="523" key="dock-window-3" timestamp="1597934748776">
<screen x="0" y="0" width="1920" height="1080" />
</state>
<state x="0" y="557" width="1920" height="523" key="dock-window-3/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1597934748776" />
<state x="2543" y="239" width="672" height="678" key="search.everywhere.popup" timestamp="1597698616567"> <state x="2543" y="239" width="672" height="678" key="search.everywhere.popup" timestamp="1597698616567">
<screen x="1920" y="0" width="1920" height="1080" /> <screen x="1920" y="0" width="1920" height="1080" />
</state> </state>

111
Compiler/Compiler.cs
View file

@ -19,44 +19,79 @@ namespace Compiler
} }
else else
{ {
bool debug = false; if (args[0] != "--dev-mode--")
string inputFileName = args[0].Split("/").Last();
string outputPath = args[0].Substring(0, args[0].LastIndexOf("/"));
if (args.Length == 2)
{ {
if (args[2] == "-v") NonDevMode(args);
{ }
debug = true; else
} {
DevMode();
}
}
}
static void DevMode()
{
for (int i = 1; i <= 2; i++)
{
Console.WriteLine($"---------------------valid, stage {i}-------------------------------");
foreach (string file in Directory.GetFiles($"/home/clemens/repositorys/lcc/stage_{i}/valid"))
{
Console.WriteLine("-------------");
List<Token> tokens = TestLexer(file, 0);
TestParser(tokens, file, 1);
} }
Compile(args[0], $"{outputPath}/assembly.s", debug);
if (debug) Console.WriteLine($"---------------------invalid, stage {i}-------------------------------");
foreach (string file in Directory.GetFiles($"/home/clemens/repositorys/lcc/stage_{i}/invalid"))
{ {
Console.WriteLine($"Compiled to {outputPath}/assembly.s"); Console.WriteLine("-------------");
List<Token> tokens = TestLexer(file, 0);
TestParser(tokens, file, 1);
} }
}
}
ProcessStartInfo startInfo = new ProcessStartInfo() static void NonDevMode(string[] args)
{ {
FileName = "gcc", bool debug = false;
Arguments = $"{outputPath}/assembly.s -o {outputPath}/{inputFileName.Replace(".c", "")}" string inputFileName = args[0].Split("/").Last();
}; string outputPath = args[0].Substring(0, args[0].LastIndexOf("/"));
Process proc = new Process() {StartInfo = startInfo,};
proc.Start();
while (!proc.HasExited) if (args.Length == 2)
{
if (args[2] == "-v")
{ {
Thread.Sleep(1); debug = true;
} }
}
File.Delete($"{outputPath}/assembly.s"); Compile(args[0], $"{outputPath}/assembly.s", debug);
if (debug)
{
Console.WriteLine($"Compiled to {outputPath}/assembly.s");
}
if (debug) ProcessStartInfo startInfo = new ProcessStartInfo()
{ {
Console.WriteLine($"Assembled to {outputPath}/program"); FileName = "gcc",
Console.WriteLine("Deleted assembly.s file. Done!"); Arguments = $"{outputPath}/assembly.s -o {outputPath}/{inputFileName.Replace(".c", "")}"
} };
Process proc = new Process() {StartInfo = startInfo,};
proc.Start();
while (!proc.HasExited)
{
Thread.Sleep(1);
}
File.Delete($"{outputPath}/assembly.s");
if (debug)
{
Console.WriteLine($"Assembled to {outputPath}/program");
Console.WriteLine("Deleted assembly.s file. Done!");
} }
} }
@ -102,7 +137,27 @@ namespace Compiler
static void PrettyPrint(Node root, string indent) static void PrettyPrint(Node root, string indent)
{ {
Console.WriteLine(indent + root.NodeType); switch (root.NodeType)
{
case NodeType.ExpressionNode:
if (root is UnaryOperatorNode)
{
Console.WriteLine(indent + root.NodeType + ":" + ((UnaryOperatorNode) root).OperatorType);
}
if (root is ConstantNode)
{
Console.WriteLine(indent + root.NodeType + ":" + ((ConstantNode) root).value);
}
break;
case NodeType.FunctionNode:
Console.WriteLine(indent + root.NodeType + ":" + ((FunctionNode) root).Name);
break;
case NodeType.ProgramNode:
case NodeType.ReturnStatementNode:
break;
}
foreach (Node child in root.Children) foreach (Node child in root.Children)
{ {
PrettyPrint(child, indent + " "); PrettyPrint(child, indent + " ");

7
Compiler/Lexer/Lexer.cs
View file

@ -47,6 +47,9 @@ namespace Compiler.Lexer
patterns.Add(new Pattern(@"^;", TokenType.SemicolonToken)); patterns.Add(new Pattern(@"^;", TokenType.SemicolonToken));
patterns.Add(new Pattern(@"^[a-zA-Z]\w*", TokenType.IdentifierToken)); patterns.Add(new Pattern(@"^[a-zA-Z]\w*", TokenType.IdentifierToken));
patterns.Add(new Pattern(@"^[0-9]+", TokenType.IntegerLiteralToken)); patterns.Add(new Pattern(@"^[0-9]+", TokenType.IntegerLiteralToken));
patterns.Add(new Pattern(@"^-", TokenType.NegationToken));
patterns.Add(new Pattern(@"^~", TokenType.BitwiseComplementToken));
patterns.Add(new Pattern(@"^!", TokenType.LogicalNegationToken));
//try each pattern do determine if it is the one matching at the beginning //try each pattern do determine if it is the one matching at the beginning
//TODO: There sure is room for optimization here //TODO: There sure is room for optimization here
@ -83,6 +86,10 @@ namespace Compiler.Lexer
case TokenType.CloseBraceToken: case TokenType.CloseBraceToken:
case TokenType.IntToken: case TokenType.IntToken:
case TokenType.SemicolonToken: case TokenType.SemicolonToken:
case TokenType.NegationToken:
case TokenType.BitwiseComplementToken:
case TokenType.LogicalNegationToken:
case TokenType.InvalidToken:
break; break;
default: default:
t.TokenType = TokenType.InvalidToken; t.TokenType = TokenType.InvalidToken;

5
Compiler/Lexer/TokenType.cs
View file

@ -12,6 +12,11 @@ namespace Compiler.Lexer
IdentifierToken, IdentifierToken,
IntegerLiteralToken, IntegerLiteralToken,
//unary operator tokens
NegationToken,
BitwiseComplementToken,
LogicalNegationToken,
//special Token to represent invalid matches //special Token to represent invalid matches
InvalidToken, InvalidToken,
} }

3
Compiler/Parser/Nodes/NodeType.cs
View file

@ -5,6 +5,7 @@ namespace Compiler.Parser.Nodes
ProgramNode, ProgramNode,
FunctionNode, FunctionNode,
ReturnStatementNode, ReturnStatementNode,
ExpressionNode ExpressionNode,
} }
} }

10
Compiler/Parser/Nodes/OperatorType.cs Normal file
View file

@ -0,0 +1,10 @@
namespace Compiler.Parser.Nodes
{
public enum OperatorType
{
//unary operators
Negation,
BitwiseComplement,
LogicalNegation,
}
}

14
Compiler/Parser/Nodes/UnaryOperatorNode.cs Normal file
View file

@ -0,0 +1,14 @@
namespace Compiler.Parser.Nodes
{
public sealed class UnaryOperatorNode : Node
{
public override NodeType NodeType { get; set; }
public OperatorType OperatorType { get; set; }
public UnaryOperatorNode(OperatorType operatorType)
{
OperatorType = operatorType;
NodeType = NodeType.ExpressionNode;
}
}
}

57
Compiler/Parser/Parser.cs
View file

@ -112,26 +112,51 @@ namespace Compiler.Parser
throw new MissingTokenException(TokenType.IntegerLiteralToken); throw new MissingTokenException(TokenType.IntegerLiteralToken);
} }
Token constantToken = _tokenList[0]; Token expressionToken = _tokenList[0];
//check if TokenType is right //the next token might be a constant or any operator
if (constantToken.TokenType != TokenType.IntegerLiteralToken) switch (expressionToken.TokenType)
{ {
throw new UnexpectedTokenException(TokenType.IntToken, constantToken.TokenType); case TokenType.IntegerLiteralToken:
} //remove int literal token
else _tokenList.RemoveAt(0);
{
//remove int literal token
_tokenList.RemoveAt(0);
//check if value Type is right //check if value Type is right
if (constantToken.Value.GetType() != typeof(int)) if (expressionToken.Value.GetType() != typeof(int))
{ {
throw new WrongTypeException(typeof(int), constantToken.Value.GetType()); throw new WrongTypeException(typeof(int), expressionToken.Value.GetType());
} }
//return final constant node to end recursion //return final constant node to end recursion
n = new ConstantNode((int) constantToken.Value); n = new ConstantNode((int) expressionToken.Value);
break;
case TokenType.NegationToken:
_tokenList.RemoveAt(0);
n = new UnaryOperatorNode(OperatorType.Negation);
n.Children.Add(Parse(NodeType.ExpressionNode));
break;
case TokenType.BitwiseComplementToken:
_tokenList.RemoveAt(0);
n = new UnaryOperatorNode(OperatorType.BitwiseComplement);
n.Children.Add(Parse(NodeType.ExpressionNode));
break;
case TokenType.LogicalNegationToken:
_tokenList.RemoveAt(0);
n = new UnaryOperatorNode(OperatorType.LogicalNegation);
n.Children.Add(Parse(NodeType.ExpressionNode));
break;
case TokenType.IntToken:
case TokenType.OpenParenthesisToken:
case TokenType.CloseParenthesisToken:
case TokenType.OpenBraceToken:
case TokenType.CloseBraceToken:
case TokenType.ReturnToken:
case TokenType.SemicolonToken:
case TokenType.IdentifierToken:
case TokenType.InvalidToken:
throw new UnexpectedTokenException(TokenType.IntToken, expressionToken.TokenType);
default:
throw new UnexpectedTokenException(TokenType.IntToken, expressionToken.TokenType);
} }
break; break;

3
grammar
View file

@ -1,4 +1,5 @@
<program> ::= <function> <program> ::= <function>
<function> ::= "int" <id> "(" ")" "{" <statement> "}" <function> ::= "int" <id> "(" ")" "{" <statement> "}"
<statement> ::= "return" <exp> ";" <statement> ::= "return" <exp> ";"
<exp> ::= <int> <exp> ::= <unary_op> <exp> | <int>
<unary_op> ::= "!" | "~" | "-"

3
stage_2/invalid/missing_const.c Normal file
View file

@ -0,0 +1,3 @@
int main() {
return !;
}

3
stage_2/invalid/missing_semicolon.c Normal file
View file

@ -0,0 +1,3 @@
int main() {
return !5
}

3
stage_2/invalid/nested_missing_const.c Normal file
View file

@ -0,0 +1,3 @@
int main() {
return !~;
}

3
stage_2/invalid/wrong_order.c Normal file
View file

@ -0,0 +1,3 @@
int main() {
return 4-;
}

3
stage_2/valid/bitwise.c Normal file
View file

@ -0,0 +1,3 @@
int main() {
return !12;
}

3
stage_2/valid/bitwise_zero.c Normal file
View file

@ -0,0 +1,3 @@
int main() {
return ~0;
}

3
stage_2/valid/neg.c Normal file
View file

@ -0,0 +1,3 @@
int main() {
return -5;
}

3
stage_2/valid/nested_ops.c Normal file
View file

@ -0,0 +1,3 @@
int main() {
return !-3;
}

3
stage_2/valid/nested_ops_2.c Normal file
View file

@ -0,0 +1,3 @@
int main() {
return -~0;
}

3
stage_2/valid/not_five.c Normal file
View file

@ -0,0 +1,3 @@
int main() {
return !5;
}

3
stage_2/valid/not_zero.c Normal file
View file

@ -0,0 +1,3 @@
int main() {
return !0;
}