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188 lines (175 loc) · 8.34 KB
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import * as ts from "typescript";
import * as lua from "../../LuaAST";
import { TransformationContext } from "../context";
import { unsupportedProperty } from "../utils/diagnostics";
import { LuaLibFeature, transformLuaLibFunction } from "../utils/lualib";
import { transformArguments, transformCallAndArguments } from "../visitors/call";
import { isStringType, isNumberType, findFirstNonOuterParent } from "../utils/typescript";
import { moveToPrecedingTemp } from "../visitors/expression-list";
import { isUnpackCall, wrapInTable } from "../utils/lua-ast";
export function transformArrayConstructorCall(
context: TransformationContext,
node: ts.CallExpression,
calledMethod: ts.PropertyAccessExpression
): lua.Expression | undefined {
const signature = context.checker.getResolvedSignature(node);
const params = transformArguments(context, node.arguments, signature);
const expressionName = calledMethod.name.text;
switch (expressionName) {
case "from":
return transformLuaLibFunction(context, LuaLibFeature.ArrayFrom, node, ...params);
case "isArray":
return transformLuaLibFunction(context, LuaLibFeature.ArrayIsArray, node, ...params);
case "of":
return wrapInTable(...params);
default:
context.diagnostics.push(unsupportedProperty(calledMethod.name, "Array", expressionName));
}
}
/**
* Optimized single element Array.push
*
* array[#array+1] = el
* return (#array + 1)
*/
function transformSingleElementArrayPush(
context: TransformationContext,
node: ts.CallExpression,
caller: lua.Expression,
param: lua.Expression
): lua.Expression {
const expressionIsUsed = !ts.isExpressionStatement(findFirstNonOuterParent(node));
const arrayIdentifier = lua.isIdentifier(caller) ? caller : moveToPrecedingTemp(context, caller);
// #array + 1
let lengthExpression: lua.Expression = lua.createBinaryExpression(
lua.createUnaryExpression(arrayIdentifier, lua.SyntaxKind.LengthOperator),
lua.createNumericLiteral(1),
lua.SyntaxKind.AdditionOperator
);
if (expressionIsUsed) {
// store length in a temp
lengthExpression = moveToPrecedingTemp(context, lengthExpression);
}
const pushStatement = lua.createAssignmentStatement(
lua.createTableIndexExpression(arrayIdentifier, lengthExpression),
param,
node
);
context.addPrecedingStatements(pushStatement);
return expressionIsUsed ? lengthExpression : lua.createNilLiteral();
}
export function transformArrayPrototypeCall(
context: TransformationContext,
node: ts.CallExpression,
calledMethod: ts.PropertyAccessExpression
): lua.Expression | undefined {
const signature = context.checker.getResolvedSignature(node);
const [caller, params] = transformCallAndArguments(context, calledMethod.expression, node.arguments, signature);
const expressionName = calledMethod.name.text;
switch (expressionName) {
case "concat":
return transformLuaLibFunction(context, LuaLibFeature.ArrayConcat, node, caller, ...params);
case "entries":
return transformLuaLibFunction(context, LuaLibFeature.ArrayEntries, node, caller);
case "push":
if (node.arguments.length === 1) {
const param = params[0];
if (isUnpackCall(param)) {
return transformLuaLibFunction(
context,
LuaLibFeature.ArrayPushArray,
node,
caller,
(param as lua.CallExpression).params[0]
);
}
if (!lua.isDotsLiteral(param)) {
return transformSingleElementArrayPush(context, node, caller, param);
}
}
return transformLuaLibFunction(context, LuaLibFeature.ArrayPush, node, caller, ...params);
case "reverse":
return transformLuaLibFunction(context, LuaLibFeature.ArrayReverse, node, caller);
case "shift":
return lua.createCallExpression(
lua.createTableIndexExpression(lua.createIdentifier("table"), lua.createStringLiteral("remove")),
[caller, lua.createNumericLiteral(1)],
node
);
case "unshift":
return transformLuaLibFunction(context, LuaLibFeature.ArrayUnshift, node, caller, ...params);
case "sort":
return transformLuaLibFunction(context, LuaLibFeature.ArraySort, node, caller, ...params);
case "pop":
return lua.createCallExpression(
lua.createTableIndexExpression(lua.createIdentifier("table"), lua.createStringLiteral("remove")),
[caller],
node
);
case "forEach":
return transformLuaLibFunction(context, LuaLibFeature.ArrayForEach, node, caller, ...params);
case "find":
return transformLuaLibFunction(context, LuaLibFeature.ArrayFind, node, caller, ...params);
case "findIndex":
return transformLuaLibFunction(context, LuaLibFeature.ArrayFindIndex, node, caller, ...params);
case "includes":
return transformLuaLibFunction(context, LuaLibFeature.ArrayIncludes, node, caller, ...params);
case "indexOf":
return transformLuaLibFunction(context, LuaLibFeature.ArrayIndexOf, node, caller, ...params);
case "map":
return transformLuaLibFunction(context, LuaLibFeature.ArrayMap, node, caller, ...params);
case "filter":
return transformLuaLibFunction(context, LuaLibFeature.ArrayFilter, node, caller, ...params);
case "reduce":
return transformLuaLibFunction(context, LuaLibFeature.ArrayReduce, node, caller, ...params);
case "reduceRight":
return transformLuaLibFunction(context, LuaLibFeature.ArrayReduceRight, node, caller, ...params);
case "some":
return transformLuaLibFunction(context, LuaLibFeature.ArraySome, node, caller, ...params);
case "every":
return transformLuaLibFunction(context, LuaLibFeature.ArrayEvery, node, caller, ...params);
case "slice":
return transformLuaLibFunction(context, LuaLibFeature.ArraySlice, node, caller, ...params);
case "splice":
return transformLuaLibFunction(context, LuaLibFeature.ArraySplice, node, caller, ...params);
case "join":
const callerType = context.checker.getTypeAtLocation(calledMethod.expression);
const elementType = context.checker.getElementTypeOfArrayType(callerType);
if (elementType && (isStringType(context, elementType) || isNumberType(context, elementType))) {
const defaultSeparatorLiteral = lua.createStringLiteral(",");
const param = params[0];
const parameters = [
caller,
node.arguments.length === 0
? defaultSeparatorLiteral
: lua.isStringLiteral(param)
? param
: lua.createBinaryExpression(param, defaultSeparatorLiteral, lua.SyntaxKind.OrOperator),
];
return lua.createCallExpression(
lua.createTableIndexExpression(lua.createIdentifier("table"), lua.createStringLiteral("concat")),
parameters,
node
);
}
return transformLuaLibFunction(context, LuaLibFeature.ArrayJoin, node, caller, ...params);
case "flat":
return transformLuaLibFunction(context, LuaLibFeature.ArrayFlat, node, caller, ...params);
case "flatMap":
return transformLuaLibFunction(context, LuaLibFeature.ArrayFlatMap, node, caller, ...params);
default:
context.diagnostics.push(unsupportedProperty(calledMethod.name, "array", expressionName));
}
}
export function transformArrayProperty(
context: TransformationContext,
node: ts.PropertyAccessExpression
): lua.UnaryExpression | undefined {
switch (node.name.text) {
case "length":
const expression = context.transformExpression(node.expression);
return lua.createUnaryExpression(expression, lua.SyntaxKind.LengthOperator, node);
default:
return undefined;
}
}