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import {CurrentScope} from "../_current_scope";
import {AbstractType} from "../../types/basic/_abstract_type";
import * as Expressions from "../../2_statements/expressions";
import {MethodCallChain} from "./method_call_chain";
import {UnknownType} from "../../types/basic/unknown_type";
import {FieldChain} from "./field_chain";
import {VoidType, StringType, CharacterType, DataReference, ObjectReferenceType, FloatType, IntegerType, XSequenceType, XStringType, HexType, XGenericType} from "../../types/basic";
import {Constant} from "./constant";
import {BasicTypes} from "../basic_types";
import {ComponentChain} from "./component_chain";
import {StringTemplate} from "./string_template";
import {ValueBody} from "./value_body";
import {Cond} from "./cond";
import {ReduceBody} from "./reduce_body";
import {ReferenceType} from "../_reference";
import {SwitchBody} from "./switch_body";
import {CondBody} from "./cond_body";
import {ConvBody} from "./conv_body";
import {FilterBody} from "./filter_body";
import {CorrespondingBody} from "./corresponding_body";
import {BuiltIn} from "../_builtin";
import {AttributeChain} from "./attribute_chain";
import {Dereference} from "./dereference";
import {TypedIdentifier} from "../../types/_typed_identifier";
import {TypeUtils} from "../_type_utils";
/*
* Type interference, valid scenarios:
* typed = VALUE #( ... ). right hand side must follow left hand type
* DATA(bar) = VALUE type( ... ). left gets the type of rigthand
* typed = VALUE type( ... ). types must match and be compatible???
************* ERRORS *********
* VALUE #( ... ). syntax error
* DATA(bar) = VALUE #( ... ). give error, no type can be derived
*/
export class Source {
public runSyntax(
node: ExpressionNode | undefined,
scope: CurrentScope,
filename: string,
targetType?: AbstractType,
writeReference = false): AbstractType | undefined {
if (node === undefined) {
return undefined;
}
const children = node.getChildren().slice();
let first = children.shift();
if (first instanceof TokenNode) {
const token = first.getFirstToken();
const tok = token.getStr().toUpperCase();
switch (tok) {
case "(":
case "-":
case "+":
case "BIT":
break;
case "BOOLC":
{
const method = new BuiltIn().searchBuiltin(tok);
scope.addReference(token, method, ReferenceType.BuiltinMethodReference, filename);
new Cond().runSyntax(node.findDirectExpression(Expressions.Cond), scope, filename);
return StringType.get();
}
case "XSDBOOL":
{
const method = new BuiltIn().searchBuiltin(tok);
scope.addReference(token, method, ReferenceType.BuiltinMethodReference, filename);
new Cond().runSyntax(node.findDirectExpression(Expressions.Cond), scope, filename);
return new CharacterType(1, {qualifiedName: "ABAP_BOOL", ddicName: "ABAP_BOOL"});
}
case "REDUCE":
{
const foundType = this.determineType(node, scope, filename, targetType);
const bodyType = new ReduceBody().runSyntax(node.findDirectExpression(Expressions.ReduceBody), scope, filename, foundType);
if (foundType === undefined || foundType.isGeneric()) {
this.addIfInferred(node, scope, filename, bodyType);
} else {
this.addIfInferred(node, scope, filename, foundType);
}
return foundType ? foundType : bodyType;
}
case "SWITCH":
{
const foundType = this.determineType(node, scope, filename, targetType);
const bodyType = new SwitchBody().runSyntax(node.findDirectExpression(Expressions.SwitchBody), scope, filename);
if (foundType === undefined || foundType.isGeneric()) {
this.addIfInferred(node, scope, filename, bodyType);
} else {
this.addIfInferred(node, scope, filename, foundType);
}
return foundType ? foundType : bodyType;
}
case "COND":
{
const foundType = this.determineType(node, scope, filename, targetType);
const bodyType = new CondBody().runSyntax(node.findDirectExpression(Expressions.CondBody), scope, filename);
if (foundType === undefined || foundType.isGeneric()) {
this.addIfInferred(node, scope, filename, bodyType);
} else {
this.addIfInferred(node, scope, filename, foundType);
}
children.shift();
children.shift();
children.shift();
children.shift();
this.traverseRemainingChildren(children, scope, filename);
return foundType ? foundType : bodyType;
}
case "CONV":
{
const foundType = this.determineType(node, scope, filename, targetType);
const bodyType = new ConvBody().runSyntax(node.findDirectExpression(Expressions.ConvBody), scope, filename);
if (new TypeUtils(scope).isAssignable(foundType, bodyType) === false) {
throw new Error("CONV: Types not compatible");
}
this.addIfInferred(node, scope, filename, foundType);
return foundType;
}
case "REF":
{
const foundType = this.determineType(node, scope, filename, targetType);
const s = new Source().runSyntax(node.findDirectExpression(Expressions.Source), scope, filename);
if (foundType === undefined && s) {
return new DataReference(s);
} else {
return foundType;
}
}
case "FILTER":
{
const foundType = this.determineType(node, scope, filename, targetType);
const bodyType = new FilterBody().runSyntax(node.findDirectExpression(Expressions.FilterBody), scope, filename, foundType);
if (foundType === undefined || foundType.isGeneric()) {
this.addIfInferred(node, scope, filename, bodyType);
} else {
this.addIfInferred(node, scope, filename, foundType);
}
if (foundType && !(foundType instanceof UnknownType)) {
return foundType;
} else {
return bodyType;
}
}
case "CORRESPONDING":
{
const foundType = this.determineType(node, scope, filename, targetType);
new CorrespondingBody().runSyntax(node.findDirectExpression(Expressions.CorrespondingBody), scope, filename, foundType);
this.addIfInferred(node, scope, filename, foundType);
return foundType;
}
case "EXACT":
return this.determineType(node, scope, filename, targetType);
case "VALUE":
{
const foundType = this.determineType(node, scope, filename, targetType);
const bodyType = new ValueBody().runSyntax(node.findDirectExpression(Expressions.ValueBody), scope, filename, foundType);
if (foundType === undefined || foundType.isGeneric()) {
this.addIfInferred(node, scope, filename, bodyType);
} else {
this.addIfInferred(node, scope, filename, foundType);
}
return foundType ? foundType : bodyType;
}
default:
return new UnknownType("todo, Source type " + tok);
}
} else if (first === undefined || !(first instanceof ExpressionNode)) {
return undefined;
}
let context: AbstractType | undefined = new UnknownType("todo, Source type");
const type = [ReferenceType.DataReadReference];
if (writeReference) {
type.push(ReferenceType.DataWriteReference);
}
let hexExpected = false;
let hexNext = false;
while (children.length >= 0) {
if (first instanceof ExpressionNode && first.get() instanceof Expressions.MethodCallChain) {
context = new MethodCallChain().runSyntax(first, scope, filename, targetType);
if (context === undefined) {
throw new Error("Method has no RETURNING value");
}
} else if (first instanceof ExpressionNode && first.get() instanceof Expressions.FieldChain) {
context = new FieldChain().runSyntax(first, scope, filename, type);
} else if (first instanceof ExpressionNode && first.get() instanceof Expressions.StringTemplate) {
context = new StringTemplate().runSyntax(first, scope, filename);
} else if (first instanceof ExpressionNode && first.get() instanceof Expressions.Source) {
const found = new Source().runSyntax(first, scope, filename);
context = this.infer(context, found);
} else if (first instanceof ExpressionNode && first.get() instanceof Expressions.Constant) {
const found = new Constant().runSyntax(first);
context = this.infer(context, found);
} else if (first instanceof ExpressionNode && first.get() instanceof Expressions.Dereference) {
context = new Dereference().runSyntax(context);
} else if (first instanceof ExpressionNode && first.get() instanceof Expressions.ComponentChain) {
context = new ComponentChain().runSyntax(context, first, scope, filename);
} else if (first instanceof ExpressionNode && first.get() instanceof Expressions.ArithOperator) {
if (first.concatTokens() === "**") {
context = new FloatType();
}
const operator = first.concatTokens().toUpperCase();
if (operator === "BIT-OR" || operator === "BIT-AND" || operator === "BIT-XOR") {
hexExpected = true;
hexNext = true;
}
} else if (first instanceof ExpressionNode && first.get() instanceof Expressions.AttributeChain) {
context = new AttributeChain().runSyntax(context, first, scope, filename, type);
}
if (hexExpected === true) {
if (!(context instanceof VoidType)
&& !(context instanceof XStringType)
&& !(context instanceof HexType)
&& !(context instanceof XGenericType)
&& !(context instanceof XSequenceType)
&& !(context instanceof UnknownType)) {
throw new Error("Operator only valid for XSTRING or HEX");
}
if (hexNext === false) {
hexExpected = false;
}
hexNext = false;
}
first = children.shift();
if (first === undefined) {
break;
}
}
if (node.findDirectTokenByText("&&")) {
return StringType.get();
}
return context;
}
////////////////////////////////
private traverseRemainingChildren(children: (ExpressionNode | TokenNode)[], scope: CurrentScope, filename: string) {
const last = children[children.length - 1];
if (last && last.get() instanceof Expressions.Source) {
new Source().runSyntax(last as ExpressionNode, scope, filename);
}
}
private infer(context: AbstractType | undefined, found: AbstractType | undefined) {
if (context instanceof FloatType && found instanceof IntegerType) {
return context;
} else {
return found;
}
}
public addIfInferred(
node: ExpressionNode,
scope: CurrentScope,
filename: string,
inferredType: AbstractType | undefined): void {
const basic = new BasicTypes(filename, scope);
const typeExpression = node.findFirstExpression(Expressions.TypeNameOrInfer);
const typeToken = typeExpression?.getFirstToken();
const typeName = typeToken?.getStr();
if (typeName === "#" && inferredType && typeToken) {
const found = basic.lookupQualifiedName(inferredType.getQualifiedName());
if (found) {
scope.addReference(typeToken, found, ReferenceType.InferredType, filename);
} else if (inferredType instanceof ObjectReferenceType) {
const def = scope.findObjectDefinition(inferredType.getQualifiedName());
if (def) {
const tid = new TypedIdentifier(typeToken, filename, inferredType);
scope.addReference(typeToken, tid, ReferenceType.InferredType, filename);
}
} else if (inferredType instanceof CharacterType) {
// character is bit special it does not have a qualified name eg "TYPE c LENGTH 6"
const tid = new TypedIdentifier(typeToken, filename, inferredType);
scope.addReference(typeToken, tid, ReferenceType.InferredType, filename);
}
}
}
private determineType(
node: ExpressionNode,
scope: CurrentScope,
filename: string,
targetType: AbstractType | undefined): AbstractType | undefined {
const basic = new BasicTypes(filename, scope);
const typeExpression = node.findFirstExpression(Expressions.TypeNameOrInfer);
const typeToken = typeExpression?.getFirstToken();
const typeName = typeToken?.getStr();
if (typeExpression === undefined) {
throw new Error("determineType, child TypeNameOrInfer not found");
} else if (typeName === "#" && targetType) {
return targetType;
}
if (typeName !== "#" && typeToken) {
const found = basic.parseType(typeExpression);
if (found && found instanceof UnknownType) {
if (scope.getDDIC().inErrorNamespace(typeName) === false) {
scope.addReference(typeToken, undefined, ReferenceType.VoidType, filename);
return new VoidType(typeName);
} else {
const tid = new TypedIdentifier(typeToken, filename, found);
scope.addReference(typeToken, tid, ReferenceType.TypeReference, filename);
return found;
}
} else if (found === undefined) {
throw new Error("Type \"" + typeName + "\" not found in scope, VALUE");
}
return found;
}
return targetType;
}
} |