Parsing expression with unknown number of parameters in DynamicExpreso
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Due to performance reasons GitHub page suggests "If you need to run the same expression multiple times with different parameters I suggest to parse it one time and then invoke the parsed expression multiple times."
I have a class like this:
public class Conditional : TemplateElement
{
public string Condition { get => _condition; set => _condition = value; }
public Lambda Parsed { get => ...; private set => ... }
public Conditional(string condition)
{
Condition = condition;
...
ParseExpression();
}
private void ParseExpression()
{
var target = new Interpreter();
Lambda = target.Parse(Condition, ???);
}
}
The 'Condition' string can be in form:
item["CreatedDate"] <= DateTime.Today.AddDays(-2)
Now, at the moment of instantiation of Conditional class I don't know what the 'item' contains, I want it to be parsed so I can use it later. Lambda should resolve to the Condition to boolean.
I'm not exactly sure how to achieve this, documentation doesn't help me much. Should I define 'item' as specific type in Parameters array?
c# dynamic-expresso
asked Nov 16 '18 at 13:58
n0en0e
549
add a comment |
Due to performance reasons GitHub page suggests "If you need to run the same expression multiple times with different parameters I suggest to parse it one time and then invoke the parsed expression multiple times."
I have a class like this:
public class Conditional : TemplateElement
{
public string Condition { get => _condition; set => _condition = value; }
public Lambda Parsed { get => ...; private set => ... }
public Conditional(string condition)
{
Condition = condition;
...
ParseExpression();
}
private void ParseExpression()
{
var target = new Interpreter();
Lambda = target.Parse(Condition, ???);
}
}
The 'Condition' string can be in form:
item["CreatedDate"] <= DateTime.Today.AddDays(-2)
Now, at the moment of instantiation of Conditional class I don't know what the 'item' contains, I want it to be parsed so I can use it later. Lambda should resolve to the Condition to boolean.
I'm not exactly sure how to achieve this, documentation doesn't help me much. Should I define 'item' as specific type in Parameters array?
c# dynamic-expresso
asked Nov 16 '18 at 13:58
n0en0e
549
I suggest to post this question on github issues. For your specific case try to look here: github.com/davideicardi/DynamicExpresso#parameters
– Davide Icardi
Nov 16 '18 at 14:48
add a comment |
Due to performance reasons GitHub page suggests "If you need to run the same expression multiple times with different parameters I suggest to parse it one time and then invoke the parsed expression multiple times."
I have a class like this:
public class Conditional : TemplateElement
{
public string Condition { get => _condition; set => _condition = value; }
public Lambda Parsed { get => ...; private set => ... }
public Conditional(string condition)
{
Condition = condition;
...
ParseExpression();
}
private void ParseExpression()
{
var target = new Interpreter();
Lambda = target.Parse(Condition, ???);
}
}
The 'Condition' string can be in form:
item["CreatedDate"] <= DateTime.Today.AddDays(-2)
Now, at the moment of instantiation of Conditional class I don't know what the 'item' contains, I want it to be parsed so I can use it later. Lambda should resolve to the Condition to boolean.
I'm not exactly sure how to achieve this, documentation doesn't help me much. Should I define 'item' as specific type in Parameters array?
c# dynamic-expresso
asked Nov 16 '18 at 13:58
n0en0e
549
Due to performance reasons GitHub page suggests "If you need to run the same expression multiple times with different parameters I suggest to parse it one time and then invoke the parsed expression multiple times."
I have a class like this:
public class Conditional : TemplateElement
{
public string Condition { get => _condition; set => _condition = value; }
public Lambda Parsed { get => ...; private set => ... }
public Conditional(string condition)
{
Condition = condition;
...
ParseExpression();
}
private void ParseExpression()
{
var target = new Interpreter();
Lambda = target.Parse(Condition, ???);
}
}
The 'Condition' string can be in form:
item["CreatedDate"] <= DateTime.Today.AddDays(-2)
Now, at the moment of instantiation of Conditional class I don't know what the 'item' contains, I want it to be parsed so I can use it later. Lambda should resolve to the Condition to boolean.
I'm not exactly sure how to achieve this, documentation doesn't help me much. Should I define 'item' as specific type in Parameters array?
c# dynamic-expresso
c# dynamic-expresso
asked Nov 16 '18 at 13:58
n0en0e
549
asked Nov 16 '18 at 13:58
n0en0e
549
asked Nov 16 '18 at 13:58
n0en0e
549
asked Nov 16 '18 at 13:58
n0en0e
549
asked Nov 16 '18 at 13:58
n0en0e
549
549
I suggest to post this question on github issues. For your specific case try to look here: github.com/davideicardi/DynamicExpresso#parameters
– Davide Icardi
Nov 16 '18 at 14:48
add a comment |
I suggest to post this question on github issues. For your specific case try to look here: github.com/davideicardi/DynamicExpresso#parameters
– Davide Icardi
Nov 16 '18 at 14:48
I suggest to post this question on github issues. For your specific case try to look here: github.com/davideicardi/DynamicExpresso#parameters
– Davide Icardi
Nov 16 '18 at 14:48
I suggest to post this question on github issues. For your specific case try to look here: github.com/davideicardi/DynamicExpresso#parameters
– Davide Icardi
Nov 16 '18 at 14:48
add a comment |
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I suggest to post this question on github issues. For your specific case try to look here: github.com/davideicardi/DynamicExpresso#parameters
– Davide Icardi
Nov 16 '18 at 14:48