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License: MIT License
An arithmetic expression evaluator built using .NET
License: MIT License
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Parser
The UnaryNode
of type Negative
does not get evaluated correctly.
Related unit test case:
[Fact]
public void ImplicitNegativeNumber()
{
// expression: -2
var input = new List<Token>
{
new Token(TokenType.Hyphen, "-"),
new Token(TokenType.Number, "2"),
new Token(TokenType.EndOfFile, null),
}.AsEnumerable();
var expected = new UnaryNode(
NodeType.Negative,
new NumericLiteralNode(2));
var parser = new Parser.Parser(input);
var actual = parser.Parse();
Assert.Equal(expected, actual);
}
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The UnaryNode
of type Negative
should always correctly precede:
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Parser
Given the -2(3+1)
expression, the parser should correctly output an AST like this:
BinaryNode Multiply
|
|__ UnaryNode Negative
| |
| |__ NumericLiteral 2
|
|__ BinaryNode Add
|
|__ NumericLiteral 3
|__ NumericLiteral 1
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