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C#: Implement type annotations for nullability, parameter kinds and method returns.

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This commit is contained in:
Calum Grant
2019-06-05 18:33:07 +01:00
parent 1a9f3624c2
commit 4aa1947a23
56 changed files with 1073 additions and 336 deletions
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37
csharp/ql/src/semmlecode.csharp.dbscheme
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@@ -479,6 +479,34 @@ type_mention_location(
unique int id: @type_mention ref,
int loc: @location ref);
@has_type_annotation = @assignable | @type_parameter | @callable | @array_type | @expr | @delegate_type;
/**
* A direct annotation on an entity, for example `string? x;`.
*
* Annotations:
* 0 = reftype nullability is not applicable
* 1 = reftype nullability disabled
* 2 = reftype is not annotated "!"
* 3 = reftype is annotated "?"
* 4 = readonly ref type / in parameter
* 5 = ref type parameter, return or local variable
* 6 = out parameter
*
* Note that the annotation depends on the element it annotates.
* @assignable: The annotation is on the type of the assignable, for example the variable type.
* @type_parameter: The annotation is on the reftype constraint
* @callable: The annotation is on the return type
* @array_type: The annotation is on the element type
*/
type_annotation(int id: @has_type_annotation ref, int annotation: int ref);
/** The annotation of the callable's receiver. */
receiver_type_annotation(int callable: @callable ref, int annotation: int ref);
/** The annotation of type arguments of a constructed type or method. */
type_argument_annotation(int constructedgeneric: @generic ref, int position: int ref, int annotation: int ref);
/** GENERICS **/
@generic = @type | @method | @local_function;
@@ -519,7 +547,8 @@ general_type_parameter_constraints(
specific_type_parameter_constraints(
int id: @type_parameter_constraints ref,
int base_id: @type_or_ref ref);
int base_id: @type_or_ref ref,
int nullability: int ref);
/** MODIFIERS */
@@ -691,12 +720,6 @@ local_function_stmts(
unique int fn: @local_function_stmt ref,
int stmt: @local_function ref);
@ref_callable = @local_function | @method | @delegate_type;
ref_returns(int fn: @ref_callable ref);
ref_readonly_returns(int fn: @ref_callable ref);
/** VARIABLES **/
@variable = @local_scope_variable | @field;