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GenJava.fu
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// GenJava.fu - Java code generator
//
// Copyright (C) 2011-2025 Piotr Fusik
//
// This file is part of Fusion Transpiler,
// see https://github.com/fusionlanguage/fut
//
// Fusion Transpiler is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Fusion Transpiler is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Fusion Transpiler. If not, see http://www.gnu.org/licenses/
public class GenJava : GenTyped
{
string OutputFile;
string Namespace;
protected override string GetTargetName() => "Java";
internal override void VisitLiteralLong!(long value)
{
base.VisitLiteralLong(value);
if (value < int.MinValue || value > int.MaxValue)
WriteChar('L');
}
protected override int GetLiteralChars() => 0x10000;
void WriteToString!(FuExpr expr, FuPriority parent)
{
switch (expr.Type.Id) {
case FuId.LongType:
Write("Long");
break;
case FuId.FloatType:
Write("Float");
break;
case FuId.DoubleType:
case FuId.FloatIntType:
Write("Double");
break;
case FuId.StringPtrType:
case FuId.StringStorageType:
expr.Accept(this, parent);
return;
default:
if (expr.Type is FuIntegerType)
Write("Integer");
else if (expr.Type is FuClassType) {
WritePostfix(expr, ".toString()");
return;
}
else
assert false;
break;
}
WriteCall(".toString", expr);
}
protected override void WritePrintfWidth!(FuInterpolatedPart part)
{
if (part.Precision >= 0 && part.Argument.Type is FuIntegerType) {
WriteChar('0');
VisitLiteralLong(part.Precision);
}
else
base.WritePrintfWidth(part);
}
internal override void VisitInterpolatedString!(FuInterpolatedString expr, FuPriority parent)
{
if (expr.Suffix.Length == 0
&& expr.Parts.Count == 1
&& expr.Parts[0].Prefix.Length == 0
&& expr.Parts[0].WidthExpr == null
&& expr.Parts[0].Format == ' ')
WriteToString(expr.Parts[0].Argument, parent);
else {
Write("String.format(");
WritePrintf(expr, false);
}
}
void WriteCamelCaseNotKeyword!(string name)
{
WriteCamelCase(name);
switch (name) {
case "Abstract":
case "Assert":
case "Boolean":
case "Break":
case "Byte":
case "Case":
case "Catch":
case "Char":
case "Class":
case "Const":
case "Continue":
case "Default":
case "Do":
case "Double":
case "Else":
case "Enum":
case "Extends":
case "False":
case "Final":
case "Finally":
case "Float":
case "For":
case "Foreach":
case "Goto":
case "If":
case "Implements":
case "Import":
case "Instanceof":
case "Int":
case "Interface":
case "Long":
case "Native":
case "New":
case "Null":
case "Package":
case "Private":
case "Protected":
case "Public":
case "Return":
case "Short":
case "Static":
case "Strictfp":
case "String":
case "Super":
case "Switch":
case "Synchronized":
case "Transient":
case "Throw":
case "Throws":
case "True":
case "Try":
case "Void":
case "Volatile":
case "While":
case "Yield":
case "boolean":
case "catch":
case "char":
case "extends":
case "final":
case "finally":
case "goto":
case "implements":
case "import":
case "instanceof":
case "interface":
case "package":
case "private":
case "strictfp":
case "super":
case "synchronized":
case "transient":
case "try":
case "volatile":
case "yield":
WriteChar('_');
break;
default:
break;
}
}
protected override void WriteName!(FuSymbol symbol)
{
switch (symbol) {
case FuContainerType:
Write(symbol.Name);
break;
case FuConst konst:
WriteUppercaseConstName(konst);
break;
case FuVar:
if (symbol.Parent is FuForeach forEach && forEach.Count() == 2) {
FuVar element = forEach.GetVar();
WriteCamelCaseNotKeyword(element.Name);
Write(symbol == element ? ".getKey()" : ".getValue()");
}
else
WriteCamelCaseNotKeyword(symbol.Name);
break;
case FuMember:
WriteCamelCaseNotKeyword(symbol.Name);
break;
default:
assert false;
}
}
void WriteVisibility!(FuVisibility visibility)
{
switch (visibility) {
case FuVisibility.Private:
Write("private ");
break;
case FuVisibility.Internal:
break;
case FuVisibility.Protected:
Write("protected ");
break;
case FuVisibility.Public:
Write("public ");
break;
default:
assert false;
}
}
protected override FuId GetTypeId(FuType type, bool promote)
{
FuId id = base.GetTypeId(type, promote);
switch (id) {
case FuId.ByteRange:
return FuId.SByteRange; // store unsigned bytes in Java signed bytes
case FuId.UShortRange:
return FuId.IntType;
default:
return id;
}
}
static bool IsJavaEnum(FuEnum enu)
{
for (FuSymbol? symbol = enu.First; symbol != null; symbol = symbol.Next) {
if (symbol is FuConst konst && !(konst.Value is FuImplicitEnumValue))
return false;
}
return true;
}
void WriteCollectionType!(string name, FuType elementType)
{
Include("java.util." + name);
Write(name);
WriteChar('<');
WriteJavaType(elementType, false, true);
WriteChar('>');
}
void WriteDictType!(string name, FuClassType dict)
{
Write(name);
WriteChar('<');
WriteJavaType(dict.GetKeyType(), false, true);
Write(", ");
WriteJavaType(dict.GetValueType(), false, true);
WriteChar('>');
}
void WriteJavaType!(FuType type, bool promote, bool needClass)
{
switch (type) {
case FuNumericType:
switch (GetTypeId(type, promote)) {
case FuId.SByteRange:
Write(needClass ? "Byte" : "byte");
break;
case FuId.ShortRange:
Write(needClass ? "Short" : "short");
break;
case FuId.IntType:
case FuId.NIntType:
Write(needClass ? "Integer" : "int");
break;
case FuId.LongType:
Write(needClass ? "Long" : "long");
break;
case FuId.FloatType:
Write(needClass ? "Float" : "float");
break;
case FuId.DoubleType:
Write(needClass ? "Double" : "double");
break;
default:
assert false;
}
break;
case FuEnum enu:
Write(enu.Id == FuId.BoolType
? needClass ? "Boolean" : "boolean"
: IsJavaEnum(enu) ? enu.Name
: needClass ? "Integer" : "int");
break;
case FuClassType klass:
switch (klass.Class.Id) {
case FuId.StringClass:
Write("String");
break;
case FuId.ArrayPtrClass:
case FuId.ArrayStorageClass:
WriteType(klass.GetElementType(), false);
Write("[]");
break;
case FuId.ListClass:
WriteCollectionType("ArrayList", klass.GetElementType());
break;
case FuId.QueueClass:
WriteCollectionType("ArrayDeque", klass.GetElementType());
break;
case FuId.StackClass:
WriteCollectionType("Stack", klass.GetElementType());
break;
case FuId.PriorityQueueClass:
WriteCollectionType("PriorityQueue", klass.GetElementType());
break;
case FuId.HashSetClass:
WriteCollectionType("HashSet", klass.GetElementType());
break;
case FuId.SortedSetClass:
WriteCollectionType("TreeSet", klass.GetElementType());
break;
case FuId.DictionaryClass:
Include("java.util.HashMap");
WriteDictType("HashMap", klass);
break;
case FuId.SortedDictionaryClass:
Include("java.util.TreeMap");
WriteDictType("TreeMap", klass);
break;
case FuId.OrderedDictionaryClass:
Include("java.util.LinkedHashMap");
WriteDictType("LinkedHashMap", klass);
break;
case FuId.TextWriterClass:
Write("Appendable");
break;
case FuId.StringWriterClass:
Include("java.io.StringWriter");
Write("StringWriter");
break;
case FuId.RegexClass:
Include("java.util.regex.Pattern");
Write("Pattern");
break;
case FuId.MatchClass:
Include("java.util.regex.Matcher");
Write("Matcher");
break;
case FuId.LockClass:
Write("Object");
break;
default:
Write(klass.Class.Name);
break;
}
break;
default:
Write(type.Name);
break;
}
}
protected override void WriteType!(FuType type, bool promote)
{
WriteJavaType(type, promote, false);
}
protected override void WriteNew!(FuReadWriteClassType klass, FuPriority parent)
{
Write("new ");
WriteType(klass, false);
Write("()");
}
protected override void WriteResource!(string name, int length)
{
Write("FuResource.getByteArray(");
VisitLiteralString(name);
Write(", ");
VisitLiteralLong(length);
WriteChar(')');
}
static bool IsUnsignedByte(FuType type) => type.Id == FuId.ByteRange && type is FuRangeType range && range.Max > 127;
static bool IsUnsignedByteIndexing(FuExpr expr) => expr.IsIndexing() && IsUnsignedByte(expr.Type);
void WriteIndexingInternal!(FuBinaryExpr expr)
{
if (expr.Left.Type.IsArray())
base.WriteIndexingExpr(expr, FuPriority.And /* don't care */);
else
WriteMethodCall(expr.Left, "get", expr.Right);
}
internal override void VisitPrefixExpr!(FuPrefixExpr expr, FuPriority parent)
{
if ((expr.Op == FuToken.Increment || expr.Op == FuToken.Decrement)
&& IsUnsignedByteIndexing(expr.Inner)) {
if (parent > FuPriority.And)
WriteChar('(');
Write(expr.Op == FuToken.Increment ? "++" : "--");
assert expr.Inner is FuBinaryExpr indexing;
WriteIndexingInternal(indexing);
if (parent != FuPriority.Statement)
Write(" & 0xff");
if (parent > FuPriority.And)
WriteChar(')');
}
else
base.VisitPrefixExpr(expr, parent);
}
internal override void VisitPostfixExpr!(FuPostfixExpr expr, FuPriority parent)
{
if ((expr.Op == FuToken.Increment || expr.Op == FuToken.Decrement)
&& IsUnsignedByteIndexing(expr.Inner)) {
if (parent > FuPriority.And)
WriteChar('(');
assert expr.Inner is FuBinaryExpr indexing;
WriteIndexingInternal(indexing);
Write(expr.Op == FuToken.Increment ? "++" : "--");
if (parent != FuPriority.Statement)
Write(" & 0xff");
if (parent > FuPriority.And)
WriteChar(')');
}
else
base.VisitPostfixExpr(expr, parent);
}
void WriteSByteLiteral!(FuLiteralLong literal)
{
if (literal.Value >= 0x80)
Write("(byte) ");
literal.Accept(this, FuPriority.Primary);
}
protected override void WriteEqual!(FuExpr left, FuExpr right, FuPriority parent, bool not)
{
if ((left.Type is FuStringType && right.Type.Id != FuId.NullType)
|| (right.Type is FuStringType && left.Type.Id != FuId.NullType)) {
if (not)
WriteChar('!');
WriteMethodCall(left, "equals", right);
}
else if (IsUnsignedByteIndexing(left)
&& right is FuLiteralLong rightLiteral && rightLiteral.Type.Id == FuId.ByteRange) {
if (parent > FuPriority.Equality)
WriteChar('(');
assert left is FuBinaryExpr indexing;
WriteIndexingInternal(indexing); // omit "& 0xff"
Write(GetEqOp(not));
WriteSByteLiteral(rightLiteral);
if (parent > FuPriority.Equality)
WriteChar(')');
}
else
base.WriteEqual(left, right, parent, not);
}
protected override void WriteCoercedLiteral!(FuType? type, FuExpr expr)
{
if (IsUnsignedByte(type)) {
assert expr is FuLiteralLong literal;
WriteSByteLiteral(literal);
}
else
base.WriteCoercedLiteral(type, expr);
}
protected override void WriteCoercedInternal!(FuType type, FuExpr expr, FuPriority parent)
{
if (type.Id == FuId.FloatType && expr is FuCallExpr call && call.Method.Symbol.Type.Id == FuId.FloatingType)
WriteStaticCast(type, expr);
else
base.WriteCoercedInternal(type, expr, parent);
}
protected override void WriteRel!(FuBinaryExpr expr, FuPriority parent, string op)
{
if (expr.Left.Type is FuEnum enu && IsJavaEnum(enu)) {
if (parent > FuPriority.CondAnd)
WriteChar('(');
WriteMethodCall(expr.Left, "compareTo", expr.Right);
Write(op);
WriteChar('0');
if (parent > FuPriority.CondAnd)
WriteChar(')');
}
else
base.WriteRel(expr, parent, op);
}
protected override void WriteAnd!(FuBinaryExpr expr, FuPriority parent)
{
if (IsUnsignedByteIndexing(expr.Left)
&& expr.Right is FuLiteralLong rightLiteral) {
if (parent > FuPriority.CondAnd && parent != FuPriority.And)
WriteChar('(');
assert expr.Left is FuBinaryExpr indexing;
WriteIndexingInternal(indexing); // omit "& 0xff"
Write(" & ");
VisitLiteralLong(0xff & rightLiteral.Value);
if (parent > FuPriority.CondAnd && parent != FuPriority.And)
WriteChar(')');
}
else
base.WriteAnd(expr, parent);
}
protected override void WriteStringLength!(FuExpr expr)
{
WritePostfix(expr, ".length()");
}
protected override void WriteCharAt!(FuBinaryExpr expr)
{
WriteMethodCall(expr.Left, "charAt", expr.Right);
}
internal override void VisitSymbolReference!(FuSymbolReference expr, FuPriority parent)
{
switch (expr.Symbol.Id) {
case FuId.ConsoleError:
Write("System.err");
break;
case FuId.ListCount:
case FuId.QueueCount:
case FuId.StackCount:
case FuId.PriorityQueueCount:
case FuId.HashSetCount:
case FuId.SortedSetCount:
case FuId.DictionaryCount:
case FuId.SortedDictionaryCount:
case FuId.OrderedDictionaryCount:
expr.Left.Accept(this, FuPriority.Primary);
WriteMemberOp(expr.Left, expr);
Write("size()");
break;
case FuId.MathNaN:
Write("Float.NaN");
break;
case FuId.MathNegativeInfinity:
Write("Float.NEGATIVE_INFINITY");
break;
case FuId.MathPositiveInfinity:
Write("Float.POSITIVE_INFINITY");
break;
default:
if (!WriteJavaMatchProperty(expr, parent))
base.VisitSymbolReference(expr, parent);
break;
}
}
void WriteArrayBinarySearchFill!(FuExpr obj, string method, List<FuExpr#> args)
{
Include("java.util.Arrays");
Write("Arrays.");
Write(method);
WriteChar('(');
obj.Accept(this, FuPriority.Argument);
Write(", ");
if (args.Count == 3) {
WriteStartEnd(args[1], args[2]);
Write(", ");
}
WriteNotPromoted(obj.Type.AsClassType().GetElementType(), args[0]);
WriteChar(')');
}
void WriteWrite!(FuMethod method, List<FuExpr#> args, bool newLine)
{
if (args.Count == 1 && args[0] is FuInterpolatedString interpolated) {
Write(".format(");
WritePrintf(interpolated, newLine);
}
else {
Write(".print");
if (newLine)
Write("ln");
WriteCoercedArgsInParentheses(method, args);
}
}
void WriteCompileRegex!(List<FuExpr#> args, int argIndex)
{
Include("java.util.regex.Pattern");
Write("Pattern.compile(");
args[argIndex].Accept(this, FuPriority.Argument);
WriteRegexOptions(args, ", ", " | ", "", "Pattern.CASE_INSENSITIVE", "Pattern.MULTILINE", "Pattern.DOTALL");
WriteChar(')');
}
protected override void WriteCallExpr!(FuType type, FuExpr? obj, FuMethod method, List<FuExpr#> args, FuPriority parent)
{
switch (method.Id) {
case FuId.None:
case FuId.ClassToString:
case FuId.StringContains:
case FuId.StringEndsWith:
case FuId.StringIndexOf:
case FuId.StringLastIndexOf:
case FuId.StringReplace:
case FuId.StringStartsWith:
case FuId.ListClear:
case FuId.ListContains:
case FuId.ListIndexOf:
case FuId.QueueClear:
case FuId.StackClear:
case FuId.StackPeek:
case FuId.StackPush:
case FuId.StackPop:
case FuId.PriorityQueueClear:
case FuId.HashSetAdd:
case FuId.HashSetClear:
case FuId.HashSetContains:
case FuId.HashSetRemove:
case FuId.SortedSetAdd:
case FuId.SortedSetClear:
case FuId.SortedSetContains:
case FuId.SortedSetRemove:
case FuId.DictionaryClear:
case FuId.DictionaryContainsKey:
case FuId.DictionaryRemove:
case FuId.SortedDictionaryClear:
case FuId.SortedDictionaryContainsKey:
case FuId.SortedDictionaryRemove:
case FuId.OrderedDictionaryClear:
case FuId.OrderedDictionaryContainsKey:
case FuId.OrderedDictionaryRemove:
case FuId.StringWriterToString:
case FuId.MathMethod:
case FuId.MathAbs:
case FuId.MathMax:
case FuId.MathMin:
if (obj != null) {
if (IsReferenceTo(obj, FuId.BasePtr))
Write("super");
else
obj.Accept(this, FuPriority.Primary);
WriteChar('.');
}
WriteName(method);
WriteCoercedArgsInParentheses(method, args);
break;
case FuId.EnumFromInt:
args[0].Accept(this, parent);
break;
case FuId.EnumHasFlag:
WriteEnumHasFlag(obj, args, parent);
break;
case FuId.DoubleTryParse:
Include("java.util.function.DoubleSupplier");
Write("!Double.isNaN(");
obj.Accept(this, FuPriority.Assign);
Write(" = ((DoubleSupplier) () -> { try { return Double.parseDouble(");
args[0].Accept(this, FuPriority.Argument);
Write("); } catch (NumberFormatException e) { return Double.NaN; } }).getAsDouble())");
break;
case FuId.StringSubstring:
WritePostfix(obj, ".substring(");
args[0].Accept(this, FuPriority.Argument);
if (args.Count == 2) {
Write(", ");
WriteAdd(args[0], args[1]); // FIXME: side effect
}
WriteChar(')');
break;
case FuId.StringToLower:
WritePostfix(obj, ".toLowerCase()");
break;
case FuId.StringToUpper:
WritePostfix(obj, ".toUpperCase()");
break;
case FuId.ArrayBinarySearchAll:
case FuId.ArrayBinarySearchPart:
WriteArrayBinarySearchFill(obj, "binarySearch", args);
break;
// fails for "int" etc.
// case FuId.ArrayContains:
// Include("java.util.List");
// Write("List.of(");
// obj.Accept(this, FuPriority.Argument);
// Write(").contains(");
// args[0].Accept(this, FuPriority.Argument);
// WriteChar(')');
// break;
case FuId.ArrayCopyTo:
Write("System.arraycopy(");
obj.Accept(this, FuPriority.Argument);
Write(", ");
WriteCoercedArgs(method, args);
WriteChar(')');
break;
case FuId.ArrayFillAll:
case FuId.ArrayFillPart:
WriteArrayBinarySearchFill(obj, "fill", args);
break;
case FuId.ArraySortAll:
Include("java.util.Arrays");
WriteCall("Arrays.sort", obj);
break;
case FuId.ArraySortPart:
Include("java.util.Arrays");
Write("Arrays.sort(");
obj.Accept(this, FuPriority.Argument);
Write(", ");
WriteStartEnd(args[0], args[1]);
WriteChar(')');
break;
case FuId.ListAdd:
WriteListAdd(obj, "add", args);
break;
case FuId.ListAddRange:
WriteMethodCall(obj, "addAll", args[0]);
break;
case FuId.ListAll:
WriteMethodCall(obj, "stream().allMatch", args[0]);
break;
case FuId.ListAny:
WriteMethodCall(obj, "stream().anyMatch", args[0]);
break;
case FuId.ListCopyTo:
Write("for (int _i = 0; _i < ");
args[3].Accept(this, FuPriority.Rel); // FIXME: side effect in every iteration
WriteLine("; _i++)");
Write("\t");
args[1].Accept(this, FuPriority.Primary); // FIXME: side effect in every iteration
WriteChar('[');
StartAdd(args[2]); // FIXME: side effect in every iteration
Write("_i] = ");
WritePostfix(obj, ".get("); // FIXME: side effect in every iteration
StartAdd(args[0]); // FIXME: side effect in every iteration
Write("_i)");
break;
case FuId.ListInsert:
WriteListInsert(obj, "add", args);
break;
case FuId.ListLast:
WritePostfix(obj, ".get(");
WritePostfix(obj, ".size() - 1)"); // FIXME: side effect
break;
case FuId.ListRemoveAt:
WriteMethodCall(obj, "remove", args[0]);
break;
case FuId.ListRemoveRange:
WritePostfix(obj, ".subList(");
WriteStartEnd(args[0], args[1]);
Write(").clear()");
break;
case FuId.ListSortAll:
WritePostfix(obj, ".sort(null)");
break;
case FuId.ListSortPart:
WritePostfix(obj, ".subList(");
WriteStartEnd(args[0], args[1]);
Write(").sort(null)");
break;
case FuId.QueueDequeue:
case FuId.PriorityQueueDequeue:
WritePostfix(obj, ".remove()");
break;
case FuId.QueueEnqueue:
case FuId.PriorityQueueEnqueue:
WriteMethodCall(obj, "add", args[0]);
break;
case FuId.QueuePeek:
case FuId.PriorityQueuePeek:
WritePostfix(obj, ".element()");
break;
case FuId.DictionaryAdd:
WritePostfix(obj, ".put(");
args[0].Accept(this, FuPriority.Argument);
Write(", ");
WriteNewStorage(obj.Type.AsClassType().GetValueType());
WriteChar(')');
break;
case FuId.TextWriterWrite:
if (IsReferenceTo(obj, FuId.ConsoleError)) {
Write("System.err");
WriteWrite(method, args, false);
}
else if (obj.Type.AsClassType().Class.Id == FuId.StringWriterClass) {
WritePostfix(obj, ".append(");
WriteToString(args[0], FuPriority.Argument);
WriteChar(')');
}
else {
Write("try { ");
WritePostfix(obj, ".append(");
WriteToString(args[0], FuPriority.Argument);
Include("java.io.IOException");
Write("); } catch (IOException e) { throw new RuntimeException(e); }");
}
break;
case FuId.TextWriterWriteChar:
if (IsReferenceTo(obj, FuId.ConsoleError))
WriteCharMethodCall(obj, "print", args[0]);
else if (obj.Type.AsClassType().Class.Id == FuId.StringWriterClass)
WriteCharMethodCall(obj, "append", args[0]);
else {
Write("try { ");
WriteCharMethodCall(obj, "append", args[0]);
Include("java.io.IOException");
Write("; } catch (IOException e) { throw new RuntimeException(e); }");
}
break;
case FuId.TextWriterWriteCodePoint:
if (IsReferenceTo(obj, FuId.ConsoleError)) {
WriteCall("System.err.print(Character.toChars", args[0]);
WriteChar(')');
}
else if (obj.Type.AsClassType().Class.Id == FuId.StringWriterClass) {
WriteMethodCall(obj, "append(Character.toString", args[0]);
WriteChar(')');
}
else {
Write("try { ");
WriteMethodCall(obj, "append(Character.toString", args[0]);
Include("java.io.IOException");
Write("); } catch (IOException e) { throw new RuntimeException(e); }");
}
break;
case FuId.TextWriterWriteLine:
if (IsReferenceTo(obj, FuId.ConsoleError)) {
Write("System.err");
WriteWrite(method, args, true);
}
else {
Write("try { ");
WritePostfix(obj, ".append(");
if (args.Count == 0)
Write("'\\n'");
else if (args[0] is FuInterpolatedString interpolated) {
Write("String.format(");
WritePrintf(interpolated, true);
}
else {
WriteToString(args[0], FuPriority.Argument);
Write(").append('\\n'");
}
Include("java.io.IOException");
Write("); } catch (IOException e) { throw new RuntimeException(e); }");
}
break;
case FuId.StringWriterClear:
WritePostfix(obj, ".getBuffer().setLength(0)");
break;
case FuId.ConsoleWrite:
Write("System.out");
WriteWrite(method, args, false);
break;
case FuId.ConsoleWriteLine:
Write("System.out");
WriteWrite(method, args, true);
break;
case FuId.ConvertToBase64String:
Include("java.util.Base64");
if (IsWholeArray(args[0], args[1], args[2]))
WriteCall("Base64.getEncoder().encodeToString", args[0]);
else {
Include("java.nio.ByteBuffer");
WriteCall("new String(Base64.getEncoder().encode(ByteBuffer.wrap", args[0], args[1], args[2]);
Write(").array())");
}
break;
case FuId.UTF8GetByteCount:
Include("java.nio.charset.StandardCharsets");
WritePostfix(args[0], ".getBytes(StandardCharsets.UTF_8).length"); // FIXME: quick&dirty!
break;
case FuId.UTF8GetBytes:
Include("java.nio.ByteBuffer");
Include("java.nio.CharBuffer");
Include("java.nio.charset.StandardCharsets");
Write("StandardCharsets.UTF_8.newEncoder().encode(CharBuffer.wrap(");
args[0].Accept(this, FuPriority.Argument);
Write("), ByteBuffer.wrap(");
args[1].Accept(this, FuPriority.Argument);
Write(", ");
args[2].Accept(this, FuPriority.Argument);
Write(", ");
WritePostfix(args[1], ".length"); // FIXME: side effect
if (!args[2].IsLiteralZero()) {
Write(" - ");
args[2].Accept(this, FuPriority.Mul); // FIXME: side effect
}
Write("), true)");
break;
case FuId.UTF8GetString:
Include("java.nio.charset.StandardCharsets");
Write("new String(");
WriteCoercedArgs(method, args);
Write(", StandardCharsets.UTF_8)");
break;
case FuId.EnvironmentGetEnvironmentVariable:
WriteCall("System.getenv", args[0]);
break;
case FuId.RegexCompile:
WriteCompileRegex(args, 0);
break;
case FuId.RegexEscape:
Include("java.util.regex.Pattern");
WriteCall("Pattern.quote", args[0]);
break;
case FuId.RegexIsMatchStr:
WriteCompileRegex(args, 1);
WriteCall(".matcher", args[0]);
Write(".find()");
break;
case FuId.RegexIsMatchRegex:
WriteMethodCall(obj, "matcher", args[0]);
Write(".find()");
break;
case FuId.MatchFindStr:
case FuId.MatchFindRegex:
WriteChar('(');
obj.Accept(this, FuPriority.Assign);
Write(" = ");
if (method.Id == FuId.MatchFindStr)
WriteCompileRegex(args, 1);
else
args[1].Accept(this, FuPriority.Primary);
WriteCall(".matcher", args[0]);
Write(").find()");
break;
case FuId.MatchGetCapture:
WriteMethodCall(obj, "group", args[0]);
break;
case FuId.MathCeiling:
WriteCall("Math.ceil", args[0]);
break;
case FuId.MathClamp:
Write("Math.min(Math.max(");
WriteClampAsMinMax(args);
break;
case FuId.MathFusedMultiplyAdd:
WriteCall("Math.fma", args[0], args[1], args[2]);
break;
case FuId.MathIsFinite:
WriteCall("Double.isFinite", args[0]);
break;
case FuId.MathIsInfinity:
WriteCall("Double.isInfinite", args[0]);
break;
case FuId.MathIsNaN:
WriteCall("Double.isNaN", args[0]);
break;
case FuId.MathLog2:
if (parent > FuPriority.Mul)
WriteChar('(');
WriteCall("Math.log", args[0]);
Write(" * 1.4426950408889635");
if (parent > FuPriority.Mul)
WriteChar(')');
break;
case FuId.MathRound:
WriteCall("Math.rint", args[0]);
break;
default:
NotSupported(obj, method.Name);
break;
}
}
protected override void WriteIndexingExpr!(FuBinaryExpr expr, FuPriority parent)
{
if (parent != FuPriority.Assign && IsUnsignedByte(expr.Type)) {
if (parent > FuPriority.And)
WriteChar('(');
WriteIndexingInternal(expr);
Write(" & 0xff");
if (parent > FuPriority.And)
WriteChar(')');
}
else
WriteIndexingInternal(expr);
}
protected override bool IsPromoted(FuExpr expr) => base.IsPromoted(expr) || IsUnsignedByteIndexing(expr);
protected override void WriteAssignRight!(FuBinaryExpr expr)
{
if (!IsUnsignedByteIndexing(expr.Left)
&& expr.Right is FuBinaryExpr rightBinary && rightBinary.IsAssign() && IsUnsignedByte(expr.Right.Type)) {
WriteChar('(');
base.WriteAssignRight(expr);
Write(") & 0xff");
}
else
base.WriteAssignRight(expr);
}
protected override void WriteAssign!(FuBinaryExpr expr, FuPriority parent)
{