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Deepstaging

ParameterQuery

ParameterQuery¶

Find parameters on a method.

See also: Queries Overview | MethodQuery | ConstructorQuery

var optionalParams = ParameterQuery.From(methodSymbol)
    .ThatAreOptional()
    .GetAll();

var refParams = methodSymbol.QueryParameters()
    .ThatAreRef()
    .GetAll();

Factory Methods¶

Method	Description
`From(IMethodSymbol)`	Query parameters on a method

Modifier Filters¶

Method	Description
`ThatAreRef()`	Ref parameters
`ThatAreNotRef()`	Non-ref parameters
`ThatAreOut()`	Out parameters
`ThatAreNotOut()`	Non-out parameters
`ThatAreIn()`	In parameters
`ThatAreNotIn()`	Non-in parameters
`ThatAreParams()`	Params array parameters
`ThatAreNotParams()`	Non-params parameters
`ThatAreOptional()`	Optional parameters (with defaults)
`ThatAreRequired()`	Required parameters
`ThatAreThis()`	Extension method 'this' parameter
`ThatAreNotThis()`	Non-this parameters
`ThatAreDiscards()`	Discard parameters (named `_`)
`ThatAreNotDiscards()`	Non-discard parameters

Name Filters¶

Method	Description
`WithName(string)`	Exact name match
`WithNameStartingWith(string)`	Name starts with prefix
`WithNameEndingWith(string)`	Name ends with suffix
`WithNameContaining(string)`	Name contains substring
`WithNameMatching(Regex)`	Name matches regex pattern
`WithNameMatching(Func<string, bool>)`	Custom name predicate
~~`WithNamePrefix(string)`~~	Deprecated — use `WithNameStartingWith`
~~`WithNameSuffix(string)`~~	Deprecated — use `WithNameEndingWith`

Type Filters¶

Method	Description
`WithType<T>()`	Parameters of type T
`WithType(string)`	Parameters with type name
`ThatAreGenericType()`	Parameters with generic types
`ThatAreNotGenericType()`	Parameters without generic types
`ThatAreNullable()`	Parameters with nullable annotation
`ThatAreNotNullable()`	Parameters without nullable annotation

Position Filters¶

Method	Description
`AtPosition(int)`	Parameter at specific index
`ThatAreFirst()`	First parameter
`ThatAreLast()`	Last parameter

Method	Description
`WithAttribute<TAttribute>()`	Has attribute type
`WithAttribute(string)`	Has attribute by name
`WithoutAttribute<TAttribute>()`	Lacks attribute type

Materialization¶

Same as TypeQuery: GetAll(), GetAllSymbols(), Select<T>(), SelectMany<T>(), FirstOrDefault(), First(), Any(), Count()