import {Source} from ./sources;
import {PatioInstruction} from ./patio/instructions;
import {PatioDataLayout, PatioDataValue, PatioType} from ./patio/types;

// == Compilation units ==

struct PatioCompilationUnit {
  field elements: List[PatioCompilationUnitElement];
  field source: Source;
}

// == Compilation unit elements ==

sum PatioCompilationUnitElement {
  variant PatioDataElementImmutableDefinition;
  variant PatioDataElementMutableDeclaration;
  variant PatioDataElementMutableDefinition;
  variant PatioExceptionTypeDefinition;
  variant PatioFunctionDeclaration;
  variant PatioFunctionDefinition;
}

struct PatioDataElementImmutableDefinition {
    field name: String;
    field visibility: PatioVisibility;
    field value: PatioDataValue;
    field source: Source;
}

struct PatioDataElementMutableDeclaration {
    field name: String;
    field layout: PatioDataLayout;
    field source: Source;
}

struct PatioDataElementMutableDefinition {
    field name: String;
    field visibility: PatioVisibility;
    field initialValue: PatioDataValue;
    field source: Source;
}

struct PatioExceptionTypeDefinition {
    field name: String;
    field valueType: PatioType;
    field source: Source;
}

struct PatioFunctionDeclaration {
    field name: String;
    field params: List[PatioLocal];
    field returnTypes: List[PatioType];
    field source: Source;
}

struct PatioFunctionDefinition {
    field name: String;
    field visibility: PatioVisibility;
    field locals: List[PatioLocal];
    field returnTypes: List[PatioType];
    field body: List[PatioInstruction];
    field source: Source;
}

// == Visibility ==

enum PatioVisibility {
    variant private;
    variant public;
}

// == Locals ==

struct PatioLocal {
    field name: String;
    field type: PatioType;
    field localType: PatioLocalType;
}

enum PatioLocalType {
    variant param;
    variant val;
    variant var;
}