public void Should_cast_function_params()
{
BracketOpenDefinition openBracket, logFn;
GrammerDefinition listDelimeter;
var language = new Language(
logFn = new FunctionCallDefinition(
name: "LOG",
regex: @"[Ll]og\(",
argumentTypes: new[] { typeof(double), typeof(double) },
expressionBuilder: args => Expression.Call(Type <int> .Method(x => Math.Log(0, 0)), args)),
openBracket = new BracketOpenDefinition(
name: "OPENBRACKET",
regex: @"\("),
listDelimeter = new ListDelimiterDefinition(
name: "COMMA",
regex: @"\,"),
new BracketCloseDefinition(
name: "CLOSEBRACKET",
regex: @"\)",
bracketOpenDefinitions: new[] { openBracket, logFn },
listDelimeterDefinition: listDelimeter),
new OperandDefinition(
name: "NUMBER",
regex: @"\d+",
expressionBuilder: x => Expression.Constant(int.Parse(x))),
new GrammerDefinition(name: "WHITESPACE", regex: @"\s+", ignore: true)
);
var expression = language.Parse <double>("Log(1024,2)");
Assert.Equal(10, expression.Compile()());
}
public ParserErrorTests()
{
BracketOpenDefinition openBracket, logFn, errorFn;
GrammerDefinition listDelimeter;
Language = new Language(
new OperatorDefinition(
name: "PLUS",
regex: @"\+",
orderOfPrecedence: 1,
paramaterPositions: new[] { RelativePosition.Left, RelativePosition.Right },
expressionBuilder: args => Expression.Add(args[0], args[1])),
new OperatorDefinition(
name: "MULTIPLY",
regex: @"\*",
orderOfPrecedence: 1,
paramaterPositions: new[] { RelativePosition.Left, RelativePosition.Right },
expressionBuilder: args => Expression.Multiply(args[0], args[1])),
logFn = new FunctionCallDefinition(
name: "LOG",
regex: @"[Ll]og\(",
argumentTypes: new[] { typeof(double), typeof(double) },
expressionBuilder: args => Expression.Call(Type <int> .Method(x => Math.Log(0, 0)), args)),
errorFn = new FunctionCallDefinition(
name: "ERROR",
regex: @"error\(",
argumentTypes: new[] { typeof(double), typeof(double) },
expressionBuilder: args => { throw new NotImplementedException("I am a function error"); }),
openBracket = new BracketOpenDefinition(
name: "OPENBRACKET",
regex: @"\("),
listDelimeter = new ListDelimiterDefinition(
name: "COMMA",
regex: @"\,"),
new BracketCloseDefinition(
name: "CLOSEBRACKET",
regex: @"\)",
bracketOpenDefinitions: new[] { openBracket, logFn, errorFn },
listDelimeterDefinition: listDelimeter),
new OperandDefinition(
name: "NUMBER",
regex: @"\d*\.?\d+?",
expressionBuilder: x => Expression.Constant(decimal.Parse(x))),
new OperandDefinition(
name: "POOP",
regex: @"💩",
expressionBuilder: x => { throw new NotImplementedException("I am an operand error"); }),
new OperandDefinition(
name: "STRING",
regex: @"'.*?'",
expressionBuilder: x => Expression.Constant(x)),
new GrammerDefinition(name: "WHITESPACE", regex: @"\s+", ignore: true)
);
}
/// <summary>
/// Returns the definitions for brackets used within the language.
/// </summary>
/// <param name="functionCalls">The function calls in the language. (used as opening brackets)</param>
/// <returns></returns>
protected virtual IEnumerable <GrammerDefinition> BracketDefinitions(IEnumerable <FunctionCallDefinition> functionCalls)
{
BracketOpenDefinition openBracket;
ListDelimiterDefinition delimeter;
return(new GrammerDefinition[] {
openBracket = new BracketOpenDefinition(
name: "OPEN_BRACKET",
regex: @"\("),
delimeter = new ListDelimiterDefinition(
name: "COMMA",
regex: ","),
new BracketCloseDefinition(
name: "CLOSE_BRACKET",
regex: @"\)",
bracketOpenDefinitions: new[] { openBracket }.Concat(functionCalls),
listDelimeterDefinition: delimeter)
});
}
public void Should_run_two_param_functions()
{
BracketOpenDefinition openBracket, logFn;
GrammerDefinition listDelimeter;
var language = new Language(
new OperatorDefinition(
name: "PLUS",
regex: @"\+",
orderOfPrecedence: 1,
paramaterPositions: new[] { RelativePosition.Left, RelativePosition.Right },
expressionBuilder: args => Expression.Add(args[0], args[1])),
logFn = new FunctionCallDefinition(
name: "LOG",
regex: @"[Ll]og\(",
expressionBuilder: args => Expression.Call(Type <int> .Method(x => Math.Log(0, 0)), args)),
openBracket = new BracketOpenDefinition(
name: "OPENBRACKET",
regex: @"\("),
listDelimeter = new ListDelimiterDefinition(
name: "COMMA",
regex: @"\,"),
new BracketCloseDefinition(
name: "CLOSEBRACKET",
regex: @"\)",
bracketOpenDefinitions: new[] { openBracket, logFn },
listDelimeterDefinition: listDelimeter),
new OperandDefinition(
name: "NUMBER",
regex: @"\d*\.?\d+?",
expressionBuilder: x => Expression.Constant(double.Parse(x))),
new GrammerDefinition(name: "WHITESPACE", regex: @"\s+", ignore: true)
);
var expression = language.Parse <double>("Log(1024,2) + 5");
Assert.Equal(15, expression.Compile()());
}
