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import {CurrentScope} from "../_current_scope";
import {AbstractType} from "../../types/basic/_abstract_type";
import {INode} from "../../nodes/_inode";
import * as Expressions from "../../2_statements/expressions";
import {Dash, DashW, InstanceArrow} from "../../1_lexer/tokens";
import {StructureType, ObjectReferenceType, VoidType, DataReference, TableType, UnknownType, GenericObjectReferenceType, CharacterType, HexType} from "../../types/basic";
import {ComponentName} from "./component_name";
import {AttributeName} from "./attribute_name";
import {ReferenceType} from "../_reference";
import {FieldOffset} from "./field_offset";
import {FieldLength} from "./field_length";
import {TableExpression} from "./table_expression";
import {Dereference as DereferenceExpression} from "../../2_statements/expressions";
import {Dereference} from "./dereference";
import {SourceFieldSymbol} from "./source_field_symbol";
import {SourceField} from "./source_field";
export class FieldChain {
public runSyntax(
node: ExpressionNode,
scope: CurrentScope,
filename: string,
refType?: ReferenceType | ReferenceType[] | undefined): AbstractType | undefined {
const concat = node.concatTokens();
if (concat.includes("-")) {
// workaround for names with dashes
const found = scope.findVariable(concat);
if (found) {
if (refType) {
scope.addReference(node.getFirstToken(), found, refType, filename);
}
return found.getType();
}
}
const children = node.getChildren().slice();
let contextName = children[0].concatTokens();
let context = this.findTop(children.shift(), scope, filename, refType);
while (children.length > 0) {
contextName += children[0].concatTokens();
const current = children.shift();
if (current === undefined) {
break;
}
if (current.get() instanceof DashW) {
throw new Error("Ending with dash");
} else if (current.get() instanceof Dash) {
if (context instanceof UnknownType) {
throw new Error("Not a structure, type unknown, FieldChain");
} else if (!(context instanceof StructureType)
&& !(context instanceof TableType && context.isWithHeader())
&& !(context instanceof VoidType)) {
if (context instanceof TableType && context.isWithHeader() === false) {
if (scope.isAllowHeaderUse(contextName.substring(0, contextName.length - 1))) {
// FOR ALL ENTRIES workaround
context = context.getRowType();
if (!(context instanceof StructureType) && !(context instanceof VoidType)) {
context = new StructureType([{name: "TABLE_LINE", type: context}]);
}
} else {
throw new Error("Table without header, cannot access fields, " + contextName);
}
} else {
throw new Error("Not a structure, FieldChain");
}
}
} else if (current.get() instanceof InstanceArrow) {
if (!(context instanceof ObjectReferenceType)
&& !(context instanceof DataReference)
&& !(context instanceof VoidType)) {
throw new Error("Not an object reference, field chain");
}
} else if (current.get() instanceof DereferenceExpression) {
context = new Dereference().runSyntax(context);
} else if (current.get() instanceof Expressions.ComponentName) {
if (context instanceof TableType && context.isWithHeader()) {
context = context.getRowType();
}
context = new ComponentName().runSyntax(context, current);
} else if (current instanceof ExpressionNode
&& current.get() instanceof Expressions.TableExpression) {
if (!(context instanceof TableType) && !(context instanceof VoidType)) {
throw new Error("Table expression, expected table");
}
new TableExpression().runSyntax(current, scope, filename);
if (!(context instanceof VoidType)) {
context = context.getRowType();
}
} else if (current.get() instanceof Expressions.AttributeName) {
context = new AttributeName().runSyntax(context, current, scope, filename, refType);
} else if (current.get() instanceof Expressions.FieldOffset && current instanceof ExpressionNode) {
const offset = new FieldOffset().runSyntax(current, scope, filename);
if (offset) {
if (context instanceof CharacterType) {
context = new CharacterType(context.getLength() - offset);
} else if (context instanceof HexType) {
context = new HexType(context.getLength() - offset);
}
}
} else if (current.get() instanceof Expressions.FieldLength && current instanceof ExpressionNode) {
const length = new FieldLength().runSyntax(current, scope, filename);
if (length) {
if (context instanceof CharacterType) {
context = new CharacterType(length);
} else if (context instanceof HexType) {
context = new HexType(length);
}
}
}
}
return context;
}
////////////////
private findTop(
node: INode | undefined,
scope: CurrentScope,
filename: string,
type: ReferenceType | ReferenceType[] | undefined): AbstractType | undefined {
if (node === undefined) {
return undefined;
}
if (node instanceof ExpressionNode
&& node.get() instanceof Expressions.SourceFieldSymbol) {
return new SourceFieldSymbol().runSyntax(node, scope, filename);
} else if (node instanceof ExpressionNode
&& node.get() instanceof Expressions.SourceField) {
return new SourceField().runSyntax(node, scope, filename, type);
} else if (node.get() instanceof Expressions.ClassName) {
const classTok = node.getFirstToken();
const classNam = classTok.getStr();
if (classNam.toUpperCase() === "OBJECT") {
return new GenericObjectReferenceType();
}
const found = scope.existsObject(classNam);
if (found.found === true && found.id) {
scope.addReference(classTok, found.id, found.type, filename);
return new ObjectReferenceType(found.id);
} else if (scope.getDDIC().inErrorNamespace(classNam) === false) {
scope.addReference(classTok, undefined,
ReferenceType.ObjectOrientedVoidReference, filename, {ooName: classNam.toUpperCase()});
return new VoidType(classNam);
} else {
throw new Error("Unknown class " + classNam);
}
}
return undefined;
}
} |