comments for parser
This commit is contained in:
Clemens-Dautermann
parent
5744b93eb1
commit
17e2f0e9e3
3 changed files with 91 additions and 73 deletions
114
Compiler/.idea/.idea.Compiler/.idea/workspace.xml
generated
114
Compiler/.idea/.idea.Compiler/.idea/workspace.xml
generated
|
|
@ -20,34 +20,9 @@
|
|||
</component>
|
||||
<component name="ChangeListManager">
|
||||
<list default="true" id="a54bb6de-191c-4bd1-91ab-3953adfc5dfb" name="Default Changelist" comment="">
|
||||
<change afterPath="$PROJECT_DIR$/Parser/Nodes/BinaryOperatorNode.cs" afterDir="false" />
|
||||
<change afterPath="$PROJECT_DIR$/../stage_3/invalid/malformed_paren.c" afterDir="false" />
|
||||
<change afterPath="$PROJECT_DIR$/../stage_3/invalid/missing_first_op.c" afterDir="false" />
|
||||
<change afterPath="$PROJECT_DIR$/../stage_3/invalid/missing_second_op.c" afterDir="false" />
|
||||
<change afterPath="$PROJECT_DIR$/../stage_3/invalid/no_semicolon.c" afterDir="false" />
|
||||
<change afterPath="$PROJECT_DIR$/../stage_3/valid/add.c" afterDir="false" />
|
||||
<change afterPath="$PROJECT_DIR$/../stage_3/valid/associativity.c" afterDir="false" />
|
||||
<change afterPath="$PROJECT_DIR$/../stage_3/valid/associativity_2.c" afterDir="false" />
|
||||
<change afterPath="$PROJECT_DIR$/../stage_3/valid/div.c" afterDir="false" />
|
||||
<change afterPath="$PROJECT_DIR$/../stage_3/valid/div_neg.c" afterDir="false" />
|
||||
<change afterPath="$PROJECT_DIR$/../stage_3/valid/mult.c" afterDir="false" />
|
||||
<change afterPath="$PROJECT_DIR$/../stage_3/valid/parens.c" afterDir="false" />
|
||||
<change afterPath="$PROJECT_DIR$/../stage_3/valid/precedence.c" afterDir="false" />
|
||||
<change afterPath="$PROJECT_DIR$/../stage_3/valid/sub.c" afterDir="false" />
|
||||
<change afterPath="$PROJECT_DIR$/../stage_3/valid/sub_neg.c" afterDir="false" />
|
||||
<change afterPath="$PROJECT_DIR$/../stage_3/valid/unop_add.c" afterDir="false" />
|
||||
<change afterPath="$PROJECT_DIR$/../stage_3/valid/unop_parens.c" afterDir="false" />
|
||||
<change beforePath="$PROJECT_DIR$/.idea/.idea.Compiler/.idea/contentModel.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/.idea.Compiler/.idea/contentModel.xml" afterDir="false" />
|
||||
<change beforePath="$PROJECT_DIR$/.idea/.idea.Compiler/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/.idea.Compiler/.idea/workspace.xml" afterDir="false" />
|
||||
<change beforePath="$PROJECT_DIR$/DevFunctions.cs" beforeDir="false" afterPath="$PROJECT_DIR$/DevFunctions.cs" afterDir="false" />
|
||||
<change beforePath="$PROJECT_DIR$/Lexer/Lexer.cs" beforeDir="false" afterPath="$PROJECT_DIR$/Lexer/Lexer.cs" afterDir="false" />
|
||||
<change beforePath="$PROJECT_DIR$/Lexer/TokenType.cs" beforeDir="false" afterPath="$PROJECT_DIR$/Lexer/TokenType.cs" afterDir="false" />
|
||||
<change beforePath="$PROJECT_DIR$/Parser/Nodes/ConstantNode.cs" beforeDir="false" afterPath="$PROJECT_DIR$/Parser/Nodes/ConstantNode.cs" afterDir="false" />
|
||||
<change beforePath="$PROJECT_DIR$/Parser/Nodes/NodeType.cs" beforeDir="false" afterPath="$PROJECT_DIR$/Parser/Nodes/NodeType.cs" afterDir="false" />
|
||||
<change beforePath="$PROJECT_DIR$/Parser/Nodes/OperatorType.cs" beforeDir="false" afterPath="$PROJECT_DIR$/Parser/Nodes/OperatorType.cs" afterDir="false" />
|
||||
<change beforePath="$PROJECT_DIR$/Parser/Parser.cs" beforeDir="false" afterPath="$PROJECT_DIR$/Parser/Parser.cs" afterDir="false" />
|
||||
<change beforePath="$PROJECT_DIR$/../grammar" beforeDir="false" afterPath="$PROJECT_DIR$/../grammar" afterDir="false" />
|
||||
<change beforePath="$PROJECT_DIR$/../test" beforeDir="false" />
|
||||
</list>
|
||||
<option name="SHOW_DIALOG" value="false" />
|
||||
<option name="HIGHLIGHT_CONFLICTS" value="true" />
|
||||
|
|
@ -67,8 +42,7 @@
|
|||
<component name="HighlightingSettingsPerFile">
|
||||
<setting file="file://$PROJECT_DIR$/Compiler.cs" root0="FORCE_HIGHLIGHTING" />
|
||||
<setting file="file://$APPLICATION_CONFIG_DIR$/resharper-host/DecompilerCache/decompiler/714153FB-3DE5-4537-8A59-8AE8F7F7655E/44/126d3750/String.cs" root0="SKIP_HIGHLIGHTING" />
|
||||
<setting file="mock:///Dummy.cs" root0="SKIP_HIGHLIGHTING" />
|
||||
<setting file="mock:///Dummy.cs" root0="SKIP_HIGHLIGHTING" />
|
||||
<setting file="file://$APPLICATION_CONFIG_DIR$/resharper-host/DecompilerCache/decompiler/714153FB-3DE5-4537-8A59-8AE8F7F7655E/46/638f55dc/List`1.cs" root0="SKIP_HIGHLIGHTING" />
|
||||
<setting file="file://$PROJECT_DIR$/Lexer/Lexer.cs" root0="FORCE_HIGHLIGHTING" />
|
||||
<setting file="file://$PROJECT_DIR$/Lexer/Token.cs" root0="FORCE_HIGHLIGHTING" />
|
||||
<setting file="file://$APPLICATION_CONFIG_DIR$/resharper-host/DecompilerCache/decompiler/EEDBFCB1-C56E-4F7A-8B60-B8DD27E0DC7D/86/71102cca/Enumerable.cs" root0="SKIP_HIGHLIGHTING" />
|
||||
|
|
@ -130,9 +104,9 @@
|
|||
<option value="$PROJECT_DIR$/Parser/Nodes/NodeType.cs" />
|
||||
<option value="$PROJECT_DIR$/Parser/Nodes/BinaryOperatorNode.cs" />
|
||||
<option value="$PROJECT_DIR$/Parser/Nodes/OperatorType.cs" />
|
||||
<option value="$PROJECT_DIR$/../grammar" />
|
||||
<option value="$PROJECT_DIR$/DevFunctions.cs" />
|
||||
<option value="$PROJECT_DIR$/Parser/Nodes/ConstantNode.cs" />
|
||||
<option value="$PROJECT_DIR$/../grammar" />
|
||||
<option value="$PROJECT_DIR$/Parser/Parser.cs" />
|
||||
</list>
|
||||
</option>
|
||||
|
|
@ -200,6 +174,7 @@
|
|||
<workItem from="1597952695048" duration="9233000" />
|
||||
<workItem from="1598037838306" duration="329000" />
|
||||
<workItem from="1598123734996" duration="12557000" />
|
||||
<workItem from="1598197309733" duration="2871000" />
|
||||
</task>
|
||||
<servers />
|
||||
</component>
|
||||
|
|
@ -257,70 +232,70 @@
|
|||
<screen x="1920" y="0" width="1920" height="1080" />
|
||||
</state>
|
||||
<state width="1868" height="383" key="GridCell.Tab.-1.right/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1597955238557" />
|
||||
<state width="1292" height="330" key="GridCell.Tab.0.bottom" timestamp="1598136287234">
|
||||
<state width="1292" height="249" key="GridCell.Tab.0.bottom" timestamp="1598199247638">
|
||||
<screen x="1920" y="0" width="1920" height="1080" />
|
||||
</state>
|
||||
<state width="1292" height="330" key="GridCell.Tab.0.bottom/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1598136287234" />
|
||||
<state width="1292" height="330" key="GridCell.Tab.0.center" timestamp="1598136287234">
|
||||
<state width="1292" height="249" key="GridCell.Tab.0.bottom/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1598199247638" />
|
||||
<state width="1292" height="249" key="GridCell.Tab.0.center" timestamp="1598199247638">
|
||||
<screen x="1920" y="0" width="1920" height="1080" />
|
||||
</state>
|
||||
<state width="1292" height="330" key="GridCell.Tab.0.center/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1598136287234" />
|
||||
<state width="1292" height="330" key="GridCell.Tab.0.left" timestamp="1598136287234">
|
||||
<state width="1292" height="249" key="GridCell.Tab.0.center/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1598199247638" />
|
||||
<state width="1292" height="249" key="GridCell.Tab.0.left" timestamp="1598199247638">
|
||||
<screen x="1920" y="0" width="1920" height="1080" />
|
||||
</state>
|
||||
<state width="1292" height="330" key="GridCell.Tab.0.left/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1598136287234" />
|
||||
<state width="1292" height="330" key="GridCell.Tab.0.right" timestamp="1598136287234">
|
||||
<state width="1292" height="249" key="GridCell.Tab.0.left/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1598199247638" />
|
||||
<state width="1292" height="249" key="GridCell.Tab.0.right" timestamp="1598199247638">
|
||||
<screen x="1920" y="0" width="1920" height="1080" />
|
||||
</state>
|
||||
<state width="1292" height="330" key="GridCell.Tab.0.right/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1598136287234" />
|
||||
<state width="1292" height="330" key="GridCell.Tab.1.bottom" timestamp="1598136287234">
|
||||
<state width="1292" height="249" key="GridCell.Tab.0.right/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1598199247638" />
|
||||
<state width="1292" height="330" key="GridCell.Tab.1.bottom" timestamp="1598199019855">
|
||||
<screen x="1920" y="0" width="1920" height="1080" />
|
||||
</state>
|
||||
<state width="1292" height="330" key="GridCell.Tab.1.bottom/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1598136287234" />
|
||||
<state width="1292" height="330" key="GridCell.Tab.1.center" timestamp="1598136287234">
|
||||
<state width="1292" height="330" key="GridCell.Tab.1.bottom/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1598199019855" />
|
||||
<state width="1292" height="330" key="GridCell.Tab.1.center" timestamp="1598199019855">
|
||||
<screen x="1920" y="0" width="1920" height="1080" />
|
||||
</state>
|
||||
<state width="1292" height="330" key="GridCell.Tab.1.center/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1598136287234" />
|
||||
<state width="1292" height="330" key="GridCell.Tab.1.left" timestamp="1598136287234">
|
||||
<state width="1292" height="330" key="GridCell.Tab.1.center/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1598199019855" />
|
||||
<state width="1292" height="330" key="GridCell.Tab.1.left" timestamp="1598199019855">
|
||||
<screen x="1920" y="0" width="1920" height="1080" />
|
||||
</state>
|
||||
<state width="1292" height="330" key="GridCell.Tab.1.left/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1598136287234" />
|
||||
<state width="1292" height="330" key="GridCell.Tab.1.right" timestamp="1598136287234">
|
||||
<state width="1292" height="330" key="GridCell.Tab.1.left/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1598199019855" />
|
||||
<state width="1292" height="330" key="GridCell.Tab.1.right" timestamp="1598199019855">
|
||||
<screen x="1920" y="0" width="1920" height="1080" />
|
||||
</state>
|
||||
<state width="1292" height="330" key="GridCell.Tab.1.right/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1598136287234" />
|
||||
<state width="1292" height="330" key="GridCell.Tab.2.bottom" timestamp="1598136287235">
|
||||
<state width="1292" height="330" key="GridCell.Tab.1.right/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1598199019855" />
|
||||
<state width="1292" height="330" key="GridCell.Tab.2.bottom" timestamp="1598199019855">
|
||||
<screen x="1920" y="0" width="1920" height="1080" />
|
||||
</state>
|
||||
<state width="1292" height="330" key="GridCell.Tab.2.bottom/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1598136287235" />
|
||||
<state width="1292" height="330" key="GridCell.Tab.2.center" timestamp="1598136287235">
|
||||
<state width="1292" height="330" key="GridCell.Tab.2.bottom/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1598199019855" />
|
||||
<state width="1292" height="330" key="GridCell.Tab.2.center" timestamp="1598199019855">
|
||||
<screen x="1920" y="0" width="1920" height="1080" />
|
||||
</state>
|
||||
<state width="1292" height="330" key="GridCell.Tab.2.center/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1598136287235" />
|
||||
<state width="1292" height="330" key="GridCell.Tab.2.left" timestamp="1598136287234">
|
||||
<state width="1292" height="330" key="GridCell.Tab.2.center/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1598199019855" />
|
||||
<state width="1292" height="330" key="GridCell.Tab.2.left" timestamp="1598199019855">
|
||||
<screen x="1920" y="0" width="1920" height="1080" />
|
||||
</state>
|
||||
<state width="1292" height="330" key="GridCell.Tab.2.left/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1598136287234" />
|
||||
<state width="1292" height="330" key="GridCell.Tab.2.right" timestamp="1598136287235">
|
||||
<state width="1292" height="330" key="GridCell.Tab.2.left/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1598199019855" />
|
||||
<state width="1292" height="330" key="GridCell.Tab.2.right" timestamp="1598199019855">
|
||||
<screen x="1920" y="0" width="1920" height="1080" />
|
||||
</state>
|
||||
<state width="1292" height="330" key="GridCell.Tab.2.right/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1598136287235" />
|
||||
<state width="1292" height="330" key="GridCell.Tab.3.bottom" timestamp="1598136287235">
|
||||
<state width="1292" height="330" key="GridCell.Tab.2.right/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1598199019855" />
|
||||
<state width="1292" height="330" key="GridCell.Tab.3.bottom" timestamp="1598199019855">
|
||||
<screen x="1920" y="0" width="1920" height="1080" />
|
||||
</state>
|
||||
<state width="1292" height="330" key="GridCell.Tab.3.bottom/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1598136287235" />
|
||||
<state width="1292" height="330" key="GridCell.Tab.3.center" timestamp="1598136287235">
|
||||
<state width="1292" height="330" key="GridCell.Tab.3.bottom/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1598199019855" />
|
||||
<state width="1292" height="330" key="GridCell.Tab.3.center" timestamp="1598199019855">
|
||||
<screen x="1920" y="0" width="1920" height="1080" />
|
||||
</state>
|
||||
<state width="1292" height="330" key="GridCell.Tab.3.center/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1598136287235" />
|
||||
<state width="1292" height="330" key="GridCell.Tab.3.left" timestamp="1598136287235">
|
||||
<state width="1292" height="330" key="GridCell.Tab.3.center/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1598199019855" />
|
||||
<state width="1292" height="330" key="GridCell.Tab.3.left" timestamp="1598199019855">
|
||||
<screen x="1920" y="0" width="1920" height="1080" />
|
||||
</state>
|
||||
<state width="1292" height="330" key="GridCell.Tab.3.left/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1598136287235" />
|
||||
<state width="1292" height="330" key="GridCell.Tab.3.right" timestamp="1598136287235">
|
||||
<state width="1292" height="330" key="GridCell.Tab.3.left/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1598199019855" />
|
||||
<state width="1292" height="330" key="GridCell.Tab.3.right" timestamp="1598199019855">
|
||||
<screen x="1920" y="0" width="1920" height="1080" />
|
||||
</state>
|
||||
<state width="1292" height="330" key="GridCell.Tab.3.right/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1598136287235" />
|
||||
<state width="1292" height="330" key="GridCell.Tab.3.right/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1598199019855" />
|
||||
<state width="1868" height="383" key="GridCell.Tab.4.bottom" timestamp="1597955234640">
|
||||
<screen x="1920" y="0" width="1920" height="1080" />
|
||||
</state>
|
||||
|
|
@ -361,10 +336,10 @@
|
|||
<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$ClipboardContentChooser/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1597510086756" />
|
||||
<state x="3264" y="0" width="576" height="1080" key="dock-window-1" timestamp="1598127152431">
|
||||
<state x="3264" y="0" width="576" height="1080" key="dock-window-1" timestamp="1598199648208">
|
||||
<screen x="1920" y="0" width="1920" height="1080" />
|
||||
</state>
|
||||
<state x="3264" y="0" width="576" height="1080" key="dock-window-1/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1598127152431" />
|
||||
<state x="3264" y="0" width="576" height="1080" key="dock-window-1/1920.0.1920.1080/0.0.1920.1080@1920.0.1920.1080" timestamp="1598199648208" />
|
||||
<state x="3200" y="0" width="640" height="1080" key="dock-window-2" timestamp="1597959520918">
|
||||
<screen x="1920" y="0" width="1920" height="1080" />
|
||||
</state>
|
||||
|
|
@ -396,18 +371,23 @@
|
|||
</line-breakpoint>
|
||||
<line-breakpoint enabled="true" type="DotNet Breakpoints">
|
||||
<url>file://$PROJECT_DIR$/Parser/Parser.cs</url>
|
||||
<line>107</line>
|
||||
<properties documentPath="$PROJECT_DIR$/Parser/Parser.cs" initialLine="107">
|
||||
<line>261</line>
|
||||
<properties documentPath="$PROJECT_DIR$/Parser/Parser.cs" initialLine="227">
|
||||
<startOffsets>
|
||||
<option value="3498" />
|
||||
<option value="10821" />
|
||||
</startOffsets>
|
||||
<endOffsets>
|
||||
<option value="3524" />
|
||||
<option value="10847" />
|
||||
</endOffsets>
|
||||
</properties>
|
||||
<option name="timeStamp" value="12" />
|
||||
<option name="timeStamp" value="13" />
|
||||
</line-breakpoint>
|
||||
</breakpoints>
|
||||
</breakpoint-manager>
|
||||
<pin-to-top-manager>
|
||||
<pinned-members>
|
||||
<PinnedItemInfo parentTag="Type#Compiler.Parser.Nodes.Node" memberName="Children" />
|
||||
</pinned-members>
|
||||
</pin-to-top-manager>
|
||||
</component>
|
||||
</project>
|
||||
|
|
@ -15,6 +15,7 @@ namespace Compiler.Parser
|
|||
_tokenList = tokenList;
|
||||
}
|
||||
|
||||
//A method to check the first token in _tokenList and remove it or raise accoarding error
|
||||
private void CheckFirstTokenAndRemove(TokenType expected)
|
||||
{
|
||||
if (_tokenList.Count == 0)
|
||||
|
|
@ -30,9 +31,13 @@ namespace Compiler.Parser
|
|||
_tokenList.RemoveAt(0);
|
||||
}
|
||||
|
||||
//The main RDP function
|
||||
public Node Parse(NodeType nodeType)
|
||||
{
|
||||
//declare node to be returned
|
||||
Node n;
|
||||
|
||||
//switch over the nodeType to check in which part of the parser we are
|
||||
switch (nodeType)
|
||||
{
|
||||
case NodeType.ProgramNode:
|
||||
|
|
@ -110,43 +115,57 @@ namespace Compiler.Parser
|
|||
throw new MissingTokenException(TokenType.IntegerLiteralToken);
|
||||
}
|
||||
|
||||
//an expression always has a first term
|
||||
//this first term is parsed here
|
||||
Node firstTerm = Parse(NodeType.TermNode);
|
||||
n = firstTerm;
|
||||
|
||||
//get next token
|
||||
Token expressionToken = _tokenList[0];
|
||||
|
||||
//if the next token is a + or a - it must be a binary operator because we are in an expression
|
||||
//that means that this is not a plain constant but a BinaryOperator node
|
||||
while (expressionToken.TokenType == TokenType.AdditionToken ||
|
||||
expressionToken.TokenType == TokenType.NegationToken)
|
||||
{
|
||||
//remove the - or + token
|
||||
_tokenList.RemoveAt(0);
|
||||
switch (expressionToken.TokenType)
|
||||
{
|
||||
//1. create a BinOp Node
|
||||
//2. Add the first term as a child
|
||||
//3. Parse the rest as an expression and add it as the second term
|
||||
case TokenType.AdditionToken:
|
||||
n = new BinaryOperatorNode(OperatorType.Addition);
|
||||
n.Children.Add(firstTerm);
|
||||
n.Children.Add(Parse(NodeType.TermNode));
|
||||
n.Children.Add(Parse(NodeType.ExpressionNode));
|
||||
break;
|
||||
case TokenType.NegationToken:
|
||||
n = new BinaryOperatorNode(OperatorType.Subtraction);
|
||||
n.Children.Add(firstTerm);
|
||||
n.Children.Add(Parse(NodeType.TermNode));
|
||||
n.Children.Add(Parse(NodeType.ExpressionNode));
|
||||
break;
|
||||
default:
|
||||
//this should never happen because the while loop checks for token types, that are
|
||||
//handled by case statements above only
|
||||
throw new Exception("WeirdException");
|
||||
}
|
||||
|
||||
//if there are still tokens left over pop one off
|
||||
if (_tokenList.Count > 0)
|
||||
{
|
||||
expressionToken = _tokenList[0];
|
||||
}
|
||||
else
|
||||
{
|
||||
//there must be tokens left because we are in an expression.
|
||||
throw new MissingTokenException(TokenType.IntegerLiteralToken);
|
||||
}
|
||||
}
|
||||
|
||||
break;
|
||||
|
||||
//the case for term node is almost the same as the one for expression node
|
||||
case NodeType.TermNode:
|
||||
|
||||
|
||||
|
|
@ -155,11 +174,13 @@ namespace Compiler.Parser
|
|||
throw new MissingTokenException(TokenType.IntegerLiteralToken);
|
||||
}
|
||||
|
||||
//parse first factor
|
||||
Node firstFactor = Parse(NodeType.FactorNode);
|
||||
n = firstFactor;
|
||||
|
||||
Token termToken = _tokenList[0];
|
||||
|
||||
//parse second factor if it exists
|
||||
while (termToken.TokenType == TokenType.MultiplicationToken ||
|
||||
termToken.TokenType == TokenType.DivisionToken)
|
||||
{
|
||||
|
|
@ -169,13 +190,13 @@ namespace Compiler.Parser
|
|||
case TokenType.MultiplicationToken:
|
||||
n = new BinaryOperatorNode(OperatorType.Multiplication);
|
||||
n.Children.Add(firstFactor);
|
||||
n.Children.Add(Parse(NodeType.FactorNode));
|
||||
n.Children.Add(Parse(NodeType.TermNode));
|
||||
break;
|
||||
|
||||
case TokenType.DivisionToken:
|
||||
n = new BinaryOperatorNode(OperatorType.Division);
|
||||
n.Children.Add(firstFactor);
|
||||
n.Children.Add(Parse(NodeType.FactorNode));
|
||||
n.Children.Add(Parse(NodeType.TermNode));
|
||||
break;
|
||||
default:
|
||||
throw new Exception("WeirdException");
|
||||
|
|
@ -193,6 +214,7 @@ namespace Compiler.Parser
|
|||
|
||||
break;
|
||||
|
||||
|
||||
case NodeType.FactorNode:
|
||||
if (_tokenList.Count == 0)
|
||||
{
|
||||
|
|
@ -201,20 +223,31 @@ namespace Compiler.Parser
|
|||
|
||||
Token factorToken = _tokenList[0];
|
||||
|
||||
//switch over possible next tokens. There are three possible options
|
||||
|
||||
switch (factorToken.TokenType)
|
||||
{
|
||||
//first option:
|
||||
//a parenthesised expression follows.
|
||||
case TokenType.OpenParenthesisToken:
|
||||
//check and remove openParenthesis (it has already been checked in the case, so removal would be enough)
|
||||
CheckFirstTokenAndRemove(TokenType.OpenParenthesisToken);
|
||||
//parse the things inside as an expression
|
||||
n = Parse(NodeType.ExpressionNode);
|
||||
//check if close parenthesis is supplied
|
||||
CheckFirstTokenAndRemove(TokenType.CloseParenthesisToken);
|
||||
break;
|
||||
//second option:
|
||||
//this is a unary operator expression
|
||||
case TokenType.NegationToken:
|
||||
case TokenType.BitwiseComplementToken:
|
||||
case TokenType.LogicalNegationToken:
|
||||
//just parse this as a unary operator node
|
||||
n = Parse(NodeType.UnaryOperatorNode);
|
||||
n.Children.Add(Parse(NodeType.FactorNode));
|
||||
break;
|
||||
//this is an integer literal.
|
||||
case TokenType.IntegerLiteralToken:
|
||||
//parse it as a constant
|
||||
n = Parse(NodeType.ConstantNode);
|
||||
break;
|
||||
default:
|
||||
|
|
@ -224,6 +257,7 @@ namespace Compiler.Parser
|
|||
|
||||
break;
|
||||
|
||||
//code to parse unary operator nodes
|
||||
case NodeType.UnaryOperatorNode:
|
||||
if (_tokenList.Count == 0)
|
||||
{
|
||||
|
|
@ -231,9 +265,11 @@ namespace Compiler.Parser
|
|||
}
|
||||
else
|
||||
{
|
||||
//get operator
|
||||
Token unaryOperator = _tokenList[0];
|
||||
_tokenList.RemoveAt(0);
|
||||
|
||||
//switch over three different operators and parse the rest as an expression
|
||||
switch (unaryOperator.TokenType)
|
||||
{
|
||||
case TokenType.BitwiseComplementToken:
|
||||
|
|
@ -256,6 +292,7 @@ namespace Compiler.Parser
|
|||
|
||||
break;
|
||||
|
||||
//parse constant nodes
|
||||
case NodeType.ConstantNode:
|
||||
|
||||
if (_tokenList.Count == 0)
|
||||
|
|
@ -276,6 +313,7 @@ namespace Compiler.Parser
|
|||
break;
|
||||
}
|
||||
|
||||
//default case if the supplied NodeType is unknown
|
||||
default:
|
||||
throw new Exception("Unknown Node Type " + nodeType);
|
||||
}
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue