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using System; | ||
using expressionparser; | ||
using simpleExpressionParser; | ||
using sly.lexer; | ||
using sly.parser.generator; | ||
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namespace Issue244 | ||
{ | ||
public class Issue244Parser | ||
{ | ||
[Operation((int) SimpleExpressionToken.PLUS, Affix.InFix, Associativity.Right, 10)] | ||
[Operation("MINUS", Affix.InFix, Associativity.Left, 10)] | ||
public Result BinaryTermExpression(Result left, Token<SimpleExpressionToken> operation, Result right) | ||
{ | ||
// Get the length of the expression : | ||
int length = right.EndIndex - left.StartIndex; | ||
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Result result = null; | ||
switch (operation.TokenID) | ||
{ | ||
case SimpleExpressionToken.PLUS: | ||
{ | ||
result = new Result() | ||
{ | ||
Value = left.Value + right.Value, | ||
StartColumn = left.StartColumn, | ||
EndColumn = right.EndColumn, | ||
StartIndex = left.StartIndex, | ||
EndIndex = right.EndIndex | ||
} | ||
; | ||
break; | ||
} | ||
case SimpleExpressionToken.MINUS: | ||
{ | ||
result = new Result() | ||
{ | ||
Value = left.Value - right.Value, | ||
StartColumn = left.StartColumn, | ||
EndColumn = right.EndColumn, | ||
StartIndex = left.StartIndex, | ||
EndIndex = right.EndIndex | ||
}; | ||
break; | ||
} | ||
} | ||
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return result; | ||
} | ||
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[Operation((int) SimpleExpressionToken.TIMES, Affix.InFix, Associativity.Right, 50)] | ||
[Operation("DIVIDE", Affix.InFix, Associativity.Left, 50)] | ||
public Result BinaryFactorExpression(Result left, Token<SimpleExpressionToken> operation, Result right) | ||
{ | ||
Result result = null; | ||
switch (operation.TokenID) | ||
{ | ||
case SimpleExpressionToken.TIMES: | ||
{ | ||
result = new Result() | ||
{ | ||
Value = left.Value * right.Value, | ||
StartColumn = left.StartColumn, | ||
EndColumn = right.EndColumn, | ||
StartIndex = left.StartIndex, | ||
EndIndex = right.EndIndex | ||
}; | ||
break; | ||
} | ||
case SimpleExpressionToken.DIVIDE: | ||
{ | ||
result = new Result() | ||
{ | ||
Value = left.Value / right.Value, | ||
StartColumn = left.StartColumn, | ||
EndColumn = right.EndColumn, | ||
StartIndex = left.StartIndex, | ||
EndIndex = right.EndIndex | ||
}; | ||
break; | ||
} | ||
} | ||
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return result; | ||
} | ||
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[Operation((int) SimpleExpressionToken.MINUS, Affix.PreFix, Associativity.Right, 100)] | ||
public Result PreFixExpression(Token<SimpleExpressionToken> operation, Result value) | ||
{ | ||
return new Result() | ||
{ | ||
Value = -value.Value, | ||
StartColumn = operation.Position.Column, | ||
EndColumn = value.EndColumn, | ||
StartIndex = operation.Position.Index, | ||
EndIndex = value.EndIndex | ||
}; | ||
} | ||
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[Operand] | ||
[Production("operand : primary_value")] | ||
public Result OperandValue(Result value) | ||
{ | ||
return value; | ||
} | ||
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[Production("primary_value : DOUBLE")] | ||
public Result OperandDouble(Token<SimpleExpressionToken> value) | ||
{ | ||
return new Result() | ||
{ | ||
Value = value.DoubleValue, | ||
StartColumn = value.Position.Column, | ||
EndColumn = value.Position.Column + value.Value.Length, | ||
StartIndex = value.Position.Index, | ||
EndIndex = value.Position.Index + value.Value.Length | ||
}; | ||
} | ||
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[Production("primary_value : INT")] | ||
public Result OperandInt(Token<SimpleExpressionToken> value) | ||
{ | ||
return new Result() | ||
{ | ||
Value = value.DoubleValue, | ||
StartColumn = value.Position.Column, | ||
EndColumn = value.Position.Column + value.Value.Length, | ||
StartIndex = value.Position.Index, | ||
EndIndex = value.Position.Index + value.Value.Length | ||
}; | ||
} | ||
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[Production("primary_value : LPAREN Issue244Parser_expressions RPAREN")] | ||
public Result OperandParens(Token<SimpleExpressionToken> lparen, Result value, Token<SimpleExpressionToken> rparen) | ||
{ | ||
return new Result() | ||
{ | ||
Value = value.Value, | ||
StartColumn = lparen.Position.Column, | ||
EndColumn = rparen.Position.Column + rparen.Value.Length, | ||
StartIndex = rparen.Position.Index, | ||
EndIndex = rparen.Position.Index + rparen.Value.Length, | ||
}; | ||
} | ||
} | ||
} |
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