nuget
Math expression script engine.
ScriptEngine
01 Syntax
Microsoft.VisualBasic.Math.Scripting.ScriptEngine
02 Methods
| Name | Overloads | Summary |
|---|---|---|
| setSymbol | 1 | var x = 100 const x = 100 |
| setFunction | 3 | func add(x, y) x+y |
| Shell | 1 | Run the simple script that stores in the ScriptEngine.Scripts table. |
| Evaluate | 1 | ScriptEngine.Shell()) function name alias. |
| SetVariable | 1 | Set variable value |
| ParseExpression | 1 | Parse the given expression string as the math expression |
| CheckFormulaDependency | 1 | check of the formula symbol dependency and sort the formulas in asc order by dependency list |
03 Properties
| Name | Overloads | Summary |
|---|---|---|
| Expression | 1 | The default expression engine. |
| StatementEngine | 1 | all of the commands are stored at here |
| Scripts | 1 | Lambda expression table. |
04 Members
setSymbol(
String)var x = 100 const x = 100
Parameters
| Name | Type | Description |
|---|---|---|
run | String | - |
setFunction(
String)func add(x, y) x+y
Parameters
| Name | Type | Description |
|---|---|---|
run | String | - |
setFunction(ExpressionEngine,
String)func add(x, y) x+y
Parameters
| Name | Type | Description |
|---|---|---|
run | ExpressionEngine | - |
setFunction(
String, String(), String)Parameters
| Name | Type | Description |
|---|---|---|
name | String | function name |
args | String() | parameter names |
expr | String | function body, the math expression |
Shell(
String)Run the simple script that stores in the ScriptEngine.Scripts table.
Parameters
| Name | Type | Description |
|---|---|---|
statement | String | - |
Evaluate(
String, Boolean)ScriptEngine.Shell() function name alias.
Parameters
| Name | Type | Description |
|---|---|---|
statement$ | String | - |
SetVariable(
String, String)Set variable value
Parameters
| Name | Type | Description |
|---|---|---|
name | String | - |
expr | String | - |
ParseExpression(
String, Boolean)Parse the given expression string as the math expression
Parameters
| Name | Type | Description |
|---|---|---|
expression | String | - |
throwEx | Boolean | throw exception if the parser error occured. |
Returns
this function will returns nothing if the expression parser error and also not throw exception
CheckFormulaDependency(
Dictionary(Of String, Expression), Index(Of String))check of the formula symbol dependency and sort the formulas in asc order by dependency list
Parameters
| Name | Type | Description |
|---|---|---|
formulas | Dictionary(Of String, Expression) | a collection of the symbol value assigned expression: [symbol <- expression] |
ignores | Index(Of String) | - |
Returns
the given formula dependency result list is sorted via the dependency order
Expression
The default expression engine.
StatementEngine
all of the commands are stored at here
Remarks
.quit for do nothing and end of this program.
Scripts
Lambda expression table.