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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, Integer8Type, PackedType, DecFloat16Type, DecFloat34Type, XSequenceType, XStringType, HexType, XGenericType, AnyType} 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 {Cast} from "./cast";
import {TypedIdentifier} from "../../types/_typed_identifier";
import {TypeUtils} from "../_type_utils";
import {CheckSyntaxKey, SyntaxInput, syntaxIssue} from "../_syntax_input";
import {AssertError} from "../assert_error";
import {LanguageVersion, Release, releaseAtLeast} from "../../../version";
/*
* 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
*/
// TODO: refactor all these method parameters to objects, this is getting messy
export class Source {
public static runSyntax(
node: ExpressionNode | undefined,
input: SyntaxInput,
targetType?: AbstractType,
writeReference = false,
allowGenericDeference = false,
readReference = true): 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 = BuiltIn.searchBuiltin(tok);
input.scope.addReference(token, method, ReferenceType.BuiltinMethodReference, input.filename);
Cond.runSyntax(node.findDirectExpression(Expressions.Cond)!, input);
return StringType.get();
}
case "XSDBOOL":
{
const method = BuiltIn.searchBuiltin(tok);
input.scope.addReference(token, method, ReferenceType.BuiltinMethodReference, input.filename);
Cond.runSyntax(node.findDirectExpression(Expressions.Cond)!, input);
return new CharacterType(1, {qualifiedName: "ABAP_BOOL", ddicName: "ABAP_BOOL"});
}
case "REDUCE":
{
const foundType = this.determineType(node, input, targetType);
const bodyType = ReduceBody.runSyntax(node.findDirectExpression(Expressions.ReduceBody), input, foundType);
if (foundType === undefined || foundType.isGeneric()) {
this.addIfInferred(node, input, bodyType);
} else {
this.addIfInferred(node, input, foundType);
}
this.traverseRemainingChildren(children, input);
return foundType ? foundType : bodyType;
}
case "SWITCH":
{
const foundType = this.determineType(node, input, targetType);
const bodyType = SwitchBody.runSyntax(node.findDirectExpression(Expressions.SwitchBody), input, foundType);
if (foundType === undefined || foundType.isGeneric()) {
this.addIfInferred(node, input, bodyType);
} else {
this.addIfInferred(node, input, foundType);
}
return foundType ? foundType : bodyType;
}
case "COND":
{
const foundType = this.determineType(node, input, targetType);
const bodyType = CondBody.runSyntax(node.findDirectExpression(Expressions.CondBody), input, foundType);
/*
console.log("COND BODY type;:");
console.dir(bodyType);
*/
if (foundType === undefined || foundType.isGeneric()) {
this.addIfInferred(node, input, bodyType);
} else {
this.addIfInferred(node, input, foundType);
}
children.shift();
children.shift();
children.shift();
children.shift();
this.traverseRemainingChildren(children, input);
return foundType ? foundType : bodyType;
}
case "CONV":
{
const foundType = this.determineType(node, input, targetType);
const bodyType = ConvBody.runSyntax(node.findDirectExpression(Expressions.ConvBody)!, input, foundType);
const inferred = node.findDirectExpression(Expressions.TypeNameOrInfer)?.concatTokens();
if (new TypeUtils(input.scope).isConvable(foundType, bodyType) === false) {
const message = `CONV: Types not compatible, ${foundType?.constructor.name}, ${bodyType?.constructor.name}`;
input.issues.push(syntaxIssue(input, node.getFirstToken(), message));
return VoidType.get(CheckSyntaxKey);
} else if (foundType?.isGeneric() && inferred !== "#") {
const message = "Cannot CONV to generic type";
input.issues.push(syntaxIssue(input, node.getFirstToken(), message));
return VoidType.get(CheckSyntaxKey);
}
if (foundType?.isGeneric() && bodyType !== undefined) {
this.addIfInferred(node, input, bodyType);
this.traverseRemainingChildren(children, input);
return bodyType;
}
this.addIfInferred(node, input, foundType);
this.traverseRemainingChildren(children, input);
return foundType;
}
case "REF":
{
let foundType = this.determineType(node, input, targetType);
const s = Source.runSyntax(node.findDirectExpression(Expressions.Source), input);
/*
console.dir(node.concatTokens());
console.dir(s);
console.dir(foundType);
console.dir(targetType);
*/
if (foundType && foundType.isGeneric() && s) {
foundType = new DataReference(s);
} else if (foundType === undefined && s) {
if (s instanceof AnyType) {
foundType = new DataReference(VoidType.get("REF-ANY"));
} else {
foundType = new DataReference(s);
}
} else if (foundType && targetType === undefined) {
foundType = new DataReference(foundType);
}
/*
if (targetType && !(targetType instanceof DataReference)) {
const message = `REF: Types not compatible, ` + targetType.constructor.name;
input.issues.push(syntaxIssue(input, node.getFirstToken(), message));
}
*/
this.addIfInferred(node, input, foundType);
return foundType;
}
case "FILTER":
{
const foundType = this.determineType(node, input, targetType);
const bodyType = FilterBody.runSyntax(node.findDirectExpression(Expressions.FilterBody), input, foundType);
if (foundType === undefined || foundType.isGeneric()) {
this.addIfInferred(node, input, bodyType);
} else {
this.addIfInferred(node, input, foundType);
}
if (foundType && !(foundType instanceof UnknownType)) {
return foundType;
} else {
return bodyType;
}
}
case "CORRESPONDING":
{
const foundType = this.determineType(node, input, targetType);
if (foundType?.isGeneric() === true
&& node.findDirectExpression(Expressions.TypeNameOrInfer)?.concatTokens() === "#"
&& !releaseAtLeast(input.scope.getRelease(), Release.v756)
&& input.scope.getLanguageVersion() !== LanguageVersion.Cloud
&& !input.scope.getOpenABAP()) {
const message = "CORRESPONDING #, the type of the target is generic";
input.issues.push(syntaxIssue(input, node.getFirstToken(), message));
return VoidType.get(CheckSyntaxKey);
}
CorrespondingBody.runSyntax(node.findDirectExpression(Expressions.CorrespondingBody), input, foundType);
this.addIfInferred(node, input, foundType);
return foundType;
}
case "EXACT":
{
const foundType = this.determineType(node, input, targetType);
Source.runSyntax(node.findDirectExpression(Expressions.Source), input, foundType);
this.addIfInferred(node, input, foundType);
return foundType;
}
case "VALUE":
{
const foundType = this.determineType(node, input, targetType);
const bodyType = ValueBody.runSyntax(node.findDirectExpression(Expressions.ValueBody), input, foundType);
if (foundType === undefined || foundType.isGeneric()) {
this.addIfInferred(node, input, bodyType);
} else {
this.addIfInferred(node, input, 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[] = [];
if (readReference) {
type.push(ReferenceType.DataReadReference);
}
if (writeReference) {
type.push(ReferenceType.DataWriteReference);
}
let hexExpected = false;
let hexNext = false;
// an arithmetic operator has been seen, so the operands that follow
// determine a calculation type rather than simply replacing the context
let arithmetic = false;
while (children.length >= 0) {
if (first instanceof ExpressionNode) {
const get = first.get();
if (get instanceof Expressions.MethodCallChain) {
const found = MethodCallChain.runSyntax(first, input, targetType);
context = arithmetic === true ? this.infer(context, found, true) : found;
if (context === undefined) {
const message = "Method has no RETURNING value";
input.issues.push(syntaxIssue(input, node.getFirstToken(), message));
return VoidType.get(CheckSyntaxKey);
}
} else if (get instanceof Expressions.Cast) {
const found = Cast.runSyntax(first, input, targetType);
context = arithmetic === true ? this.infer(context, found, true) : found;
} else if (get instanceof Expressions.FieldChain) {
const found = FieldChain.runSyntax(first, input, type, allowGenericDeference);
context = arithmetic === true ? this.infer(context, found, true) : found;
} else if (get instanceof Expressions.StringTemplate) {
context = StringTemplate.runSyntax(first, input);
} else if (get instanceof Expressions.Source) {
const found = Source.runSyntax(first, input);
context = this.infer(context, found, arithmetic);
} else if (get instanceof Expressions.Constant) {
const found = Constant.runSyntax(first);
context = this.infer(context, found, arithmetic);
} else if (get instanceof Expressions.Dereference) {
if (this.isNewObjectDereference(node, first)) {
const message = "NEW cannot be dereferenced directly";
input.issues.push(syntaxIssue(input, first.getFirstToken(), message));
return VoidType.get(CheckSyntaxKey);
}
context = Dereference.runSyntax(first, context, input);
} else if (get instanceof Expressions.ComponentChain) {
context = ComponentChain.runSyntax(context, first, input);
} else if (get instanceof Expressions.ArithOperator) {
arithmetic = true;
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 (get instanceof Expressions.AttributeChain) {
context = AttributeChain.runSyntax(context, first, input, type);
}
}
if (hexExpected === true) {
if (!(context instanceof VoidType)
&& !(context instanceof XStringType)
&& !(context instanceof HexType)
&& !(context instanceof XGenericType)
&& !(context instanceof XSequenceType)
&& !(context instanceof UnknownType)) {
const message = "Operator only valid for XSTRING or HEX";
input.issues.push(syntaxIssue(input, node.getFirstToken(), message));
return VoidType.get(CheckSyntaxKey);
}
if (hexNext === false) {
hexExpected = false;
}
hexNext = false;
}
first = children.shift();
if (first === undefined) {
break;
}
}
if (node.findDirectTokenByText("&&")) {
return StringType.get();
}
return context;
}
////////////////////////////////
private static traverseRemainingChildren(children: (ExpressionNode | TokenNode)[], input: SyntaxInput) {
const last = children[children.length - 1];
if (last && last.get() instanceof Expressions.Source) {
Source.runSyntax(last as ExpressionNode, input);
}
}
private static infer(context: AbstractType | undefined, found: AbstractType | undefined, arithmetic = false) {
if (arithmetic === true) {
const calculation = this.calculationType(context, found);
if (calculation !== undefined) {
return calculation;
}
}
if (context instanceof FloatType && found instanceof IntegerType) {
return context;
} else if (context instanceof IntegerType && found instanceof HexType) {
return context;
} else if ((context instanceof IntegerType || context instanceof FloatType) && found?.isGeneric()) {
return context;
} else {
return found;
}
}
/** The calculation type of an arithmetic expression is the most general of the
* operand types. An operand of type c, n, d, t or string is converted into it and
* never becomes the result: "lv_f * '0.25'" is a float, not a character field of
* length four. Returns undefined when neither operand is numeric, leaving the
* decision to the caller. */
private static calculationType(left: AbstractType | undefined, right: AbstractType | undefined) {
if (left === undefined || right === undefined) {
return undefined;
} else if (left instanceof VoidType || left instanceof UnknownType) {
// not knowing an operand means not knowing the result
return left;
} else if (right instanceof VoidType || right instanceof UnknownType) {
return right;
}
const leftRank = this.numericRank(left);
const rightRank = this.numericRank(right);
if (leftRank === undefined && rightRank === undefined) {
return undefined;
} else if (rightRank === undefined) {
return left;
} else if (leftRank === undefined) {
return right;
}
return leftRank >= rightRank ? left : right;
}
private static numericRank(type: AbstractType): number | undefined {
if (type instanceof DecFloat34Type) {
return 6;
} else if (type instanceof DecFloat16Type) {
return 5;
} else if (type instanceof FloatType) {
return 4;
} else if (type instanceof PackedType) {
return 3;
} else if (type instanceof Integer8Type) {
return 2;
} else if (type instanceof IntegerType) {
return 1;
}
return undefined;
}
public static addIfInferred(
node: ExpressionNode,
input: SyntaxInput,
inferredType: AbstractType | undefined): void {
const basic = new BasicTypes(input);
const typeExpression = node.findDirectExpression(Expressions.TypeNameOrInfer);
const typeToken = typeExpression?.getFirstToken();
// const typeName = typeToken?.getStr();
/*
console.dir(inferredType);
console.dir(typeToken);
*/
if (inferredType && typeToken) {
const found = basic.lookupQualifiedName(inferredType.getQualifiedName());
if (found) {
const tid = new TypedIdentifier(typeToken, input.filename, inferredType);
input.scope.addReference(typeToken, tid, ReferenceType.InferredType, input.filename, {foundQualified: true});
} else if (inferredType instanceof ObjectReferenceType) {
const def = input.scope.findObjectDefinition(inferredType.getQualifiedName());
const tid = new TypedIdentifier(typeToken, input.filename, inferredType);
if (def) {
input.scope.addReference(typeToken, tid, ReferenceType.InferredType, input.filename, {foundQualified: true});
} else {
input.scope.addReference(typeToken, tid, ReferenceType.InferredType, input.filename, {foundQualified: false});
}
} else {
const tid = new TypedIdentifier(typeToken, input.filename, inferredType);
input.scope.addReference(typeToken, tid, ReferenceType.InferredType, input.filename, {foundQualified: false});
}
}
}
private static determineType(
node: ExpressionNode,
input: SyntaxInput,
targetType: AbstractType | undefined): AbstractType | undefined {
const basic = new BasicTypes(input);
const typeExpression = node.findDirectExpression(Expressions.TypeNameOrInfer);
const typeToken = typeExpression?.getFirstToken();
const typeName = typeToken?.getStr();
if (typeExpression === undefined) {
throw new AssertError("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 (input.scope.getDDIC().inErrorNamespace(typeName) === false) {
input.scope.addReference(typeToken, undefined, ReferenceType.VoidType, input.filename);
return VoidType.get(typeName);
} else {
const tid = new TypedIdentifier(typeToken, input.filename, found);
input.scope.addReference(typeToken, tid, ReferenceType.TypeReference, input.filename);
return found;
}
} else if (found === undefined) {
const message = "Type \"" + typeName + "\" not found in scope, VALUE";
input.issues.push(syntaxIssue(input, node.getFirstToken(), message));
return VoidType.get(CheckSyntaxKey);
}
return found;
}
return targetType;
}
// "NEW ty( )->*" is a syntax error, also in releases where a method call can be dereferenced
private static isNewObjectDereference(node: ExpressionNode, deref: ExpressionNode): boolean {
const children = node.getChildren();
const before = children[children.indexOf(deref) - 1];
return before instanceof ExpressionNode
&& before.get() instanceof Expressions.MethodCallChain
&& before.getChildren().length === 1
&& before.getFirstChild()?.get() instanceof Expressions.NewObject;
}
}
|