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feat: implement patterns

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TopchetoEU 2024-09-14 14:23:46 +03:00
parent 23ae2b2e46
commit cb82f4cf32
Signed by: topchetoeu
GPG Key ID: 6531B8583E5F6ED4
31 changed files with 927 additions and 710 deletions
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9
src/main/java/me/topchetoeu/jscript/compilation/FunctionArrowNode.java
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@ -9,6 +9,7 @@ import me.topchetoeu.jscript.common.parsing.ParseRes;
import me.topchetoeu.jscript.common.parsing.Parsing;
import me.topchetoeu.jscript.common.parsing.Source;
import me.topchetoeu.jscript.compilation.control.ReturnNode;
import me.topchetoeu.jscript.compilation.patterns.Pattern;
public class FunctionArrowNode extends FunctionNode {
@Override public String name() { return null; }
@ -34,7 +35,7 @@ public class FunctionArrowNode extends FunctionNode {
Parameters params;
if (src.is(i + n, "(")) {
var paramsRes = JavaScript.parseParameters(src, i + n);
var paramsRes = Parameters.parseParameters(src, i + n);
if (!paramsRes.isSuccess()) return paramsRes.chainError();
n += paramsRes.n;
n += Parsing.skipEmpty(src, i + n);
@ -42,14 +43,12 @@ public class FunctionArrowNode extends FunctionNode {
params = paramsRes.result;
}
else {
var singleParam = Parsing.parseIdentifier(src, i + n);
var singleParam = Pattern.parse(src, i + n, true);
if (!singleParam.isSuccess()) return ParseRes.failed();
var paramLoc = src.loc(i + n);
n += singleParam.n;
n += Parsing.skipEmpty(src, i + n);
params = new Parameters(List.of(new Parameter(paramLoc, singleParam.result, null)));
params = new Parameters(List.of(singleParam.result));
}
if (!src.is(i + n, "=>")) return ParseRes.failed();

48
src/main/java/me/topchetoeu/jscript/compilation/FunctionNode.java
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@ -1,16 +1,15 @@
package me.topchetoeu.jscript.compilation;
import me.topchetoeu.jscript.common.Instruction;
import me.topchetoeu.jscript.common.Operation;
import me.topchetoeu.jscript.common.Instruction.BreakpointType;
import me.topchetoeu.jscript.common.environment.Environment;
import me.topchetoeu.jscript.common.parsing.Location;
import me.topchetoeu.jscript.common.parsing.ParseRes;
import me.topchetoeu.jscript.common.parsing.Parsing;
import me.topchetoeu.jscript.common.parsing.Source;
import me.topchetoeu.jscript.compilation.JavaScript.DeclarationType;
import me.topchetoeu.jscript.compilation.scope.FunctionScope;
import me.topchetoeu.jscript.compilation.scope.Variable;
import me.topchetoeu.jscript.runtime.exceptions.SyntaxException;
public abstract class FunctionNode extends Node {
public final CompoundNode body;
@ -37,36 +36,37 @@ public abstract class FunctionNode extends Node {
var i = 0;
for (var param : params.params) {
if (scope.has(param.name, false)) throw new SyntaxException(param.loc, "Duplicate parameter name not allowed");
if (!JavaScript.checkVarName(param.name)) {
throw new SyntaxException(param.loc, String.format("Unexpected identifier '%s'", param.name));
}
var varI = scope.define(new Variable(param.name, false), param.loc);
target.add(Instruction.loadMember(i++));
param.destruct(target, DeclarationType.VAR, true);
// if (scope.has(param.name, false)) throw new SyntaxException(param.loc, "Duplicate parameter name not allowed");
// if (!JavaScript.checkVarName(param.name)) {
// throw new SyntaxException(param.loc, String.format("Unexpected identifier '%s'", param.name));
// }
// var varI = scope.define(new Variable(param.name, false), param.loc);
if (param.node != null) {
var end = new DeferredIntSupplier();
// if (param.node != null) {
// var end = new DeferredIntSupplier();
target.add(Instruction.dup());
target.add(Instruction.pushUndefined());
target.add(Instruction.operation(Operation.EQUALS));
target.add(Instruction.jmpIfNot(end));
target.add(Instruction.discard());
param.node.compile(target, true);
// target.add(Instruction.dup());
// target.add(Instruction.pushUndefined());
// target.add(Instruction.operation(Operation.EQUALS));
// target.add(Instruction.jmpIfNot(end));
// target.add(Instruction.discard());
// param.node.compile(target, true);
end.set(target.size());
}
// end.set(target.size());
// }
target.add(_i -> varI.index().toSet(false));
// target.add(_i -> varI.index().toSet(false));
}
}
if (params.restName != null) {
if (scope.has(params.restName, false)) throw new SyntaxException(params.restLocation, "Duplicate parameter name not allowed");
var restVar = scope.define(new Variable(params.restName, false), params.restLocation);
if (params.rest != null) {
target.add(Instruction.loadRestArgs(params.params.size()));
target.add(_i -> restVar.index().toSet(false));
params.rest.destruct(target, DeclarationType.VAR, true);
// if (scope.has(params.restName, false)) throw new SyntaxException(params.restLocation, "Duplicate parameter name not allowed");
// var restVar = scope.define(new Variable(params.restName, false), params.restLocation);
// target.add(_i -> restVar.index().toSet(false));
}
if (selfName != null && !scope.has(name, false)) {
@ -131,7 +131,7 @@ public abstract class FunctionNode extends Node {
n += name.n;
n += Parsing.skipEmpty(src, i + n);
var params = JavaScript.parseParameters(src, i + n);
var params = Parameters.parseParameters(src, i + n);
if (!params.isSuccess()) return params.chainError(src.loc(i + n), "Expected a parameter list");
n += params.n;

65
src/main/java/me/topchetoeu/jscript/compilation/JavaScript.java
View File

@ -222,71 +222,6 @@ public final class JavaScript {
return ParseRes.failed();
}
public static ParseRes<Parameters> parseParameters(Source src, int i) {
var n = Parsing.skipEmpty(src, i);
var openParen = Parsing.parseOperator(src, i + n, "(");
if (!openParen.isSuccess()) return openParen.chainError(src.loc(i + n), "Expected a parameter list");
n += openParen.n;
var params = new ArrayList<Parameter>();
var closeParen = Parsing.parseOperator(src, i + n, ")");
n += closeParen.n;
if (!closeParen.isSuccess()) {
while (true) {
n += Parsing.skipEmpty(src, i + n);
if (src.is(i + n, "...")) {
n += 3;
var restLoc = src.loc(i);
var restName = Parsing.parseIdentifier(src, i + n);
if (!restName.isSuccess()) return ParseRes.error(src.loc(i + n), "Expected a rest parameter");
n += restName.n;
n += Parsing.skipEmpty(src, i + n);
if (!src.is(i + n, ")")) return ParseRes.error(src.loc(i + n), "Expected an end of parameters list after rest parameter");
n++;
return ParseRes.res(new Parameters(params, restName.result, restLoc), n);
}
var paramLoc = src.loc(i);
var name = Parsing.parseIdentifier(src, i + n);
if (!name.isSuccess()) return ParseRes.error(src.loc(i + n), "Expected a parameter or a closing brace");
n += name.n;
n += Parsing.skipEmpty(src, i + n);
if (src.is(i + n, "=")) {
n++;
var val = parseExpression(src, i + n, 2);
if (!val.isSuccess()) return openParen.chainError(src.loc(i + n), "Expected a parameter default value");
n += val.n;
n += Parsing.skipEmpty(src, i + n);
params.add(new Parameter(paramLoc, name.result, val.result));
}
else params.add(new Parameter(paramLoc, name.result, null));
if (src.is(i + n, ",")) {
n++;
n += Parsing.skipEmpty(src, i + n);
}
if (src.is(i + n, ")")) {
n++;
break;
}
}
}
return ParseRes.res(new Parameters(params), n);
}
public static ParseRes<DeclarationType> parseDeclarationType(Source src, int i) {
var res = Parsing.parseIdentifier(src, i);
if (!res.isSuccess()) return res.chainError();

75
src/main/java/me/topchetoeu/jscript/compilation/Parameters.java
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@ -1,29 +1,84 @@
package me.topchetoeu.jscript.compilation;
import java.util.ArrayList;
import java.util.List;
import me.topchetoeu.jscript.common.parsing.Location;
import me.topchetoeu.jscript.common.parsing.ParseRes;
import me.topchetoeu.jscript.common.parsing.Parsing;
import me.topchetoeu.jscript.common.parsing.Source;
import me.topchetoeu.jscript.compilation.patterns.Pattern;
import me.topchetoeu.jscript.compilation.values.operations.AssignNode;
public final class Parameters {
public final int length;
public final List<Parameter> params;
public final String restName;
public final Location restLocation;
public final List<Pattern> params;
public final Pattern rest;
public Parameters(List<Parameter> params, String restName, Location restLocation) {
public Parameters(List<Pattern> params, Pattern rest) {
var len = params.size();
for (var i = params.size() - 1; i >= 0; i--) {
if (params.get(i).node == null) break;
if (!(params.get(i) instanceof AssignNode)) break;
len--;
}
this.params = params;
this.length = len;
this.restName = restName;
this.restLocation = restLocation;
this.rest = rest;
}
public Parameters(List<Parameter> params) {
this(params, null, null);
public Parameters(List<Pattern> params) {
this(params, null);
}
public static ParseRes<Parameters> parseParameters(Source src, int i) {
var n = Parsing.skipEmpty(src, i);
var openParen = Parsing.parseOperator(src, i + n, "(");
if (!openParen.isSuccess()) return openParen.chainError(src.loc(i + n), "Expected a parameter list");
n += openParen.n;
var params = new ArrayList<Pattern>();
var closeParen = Parsing.parseOperator(src, i + n, ")");
n += closeParen.n;
if (!closeParen.isSuccess()) {
while (true) {
n += Parsing.skipEmpty(src, i + n);
if (src.is(i + n, "...")) {
n += 3;
var rest = Pattern.parse(src, i + n, true);
if (!rest.isSuccess()) return ParseRes.error(src.loc(i + n), "Expected a rest parameter");
n += rest.n;
n += Parsing.skipEmpty(src, i + n);
if (!src.is(i + n, ")")) return ParseRes.error(src.loc(i + n), "Expected an end of parameters list after rest parameter");
n++;
return ParseRes.res(new Parameters(params, rest.result), n);
}
var param = Pattern.parse(src, i + n, true);
if (!param.isSuccess()) return ParseRes.error(src.loc(i + n), "Expected a parameter or a closing brace");
n += param.n;
n += Parsing.skipEmpty(src, i + n);
params.add(param.result);
if (src.is(i + n, ",")) {
n++;
n += Parsing.skipEmpty(src, i + n);
}
if (src.is(i + n, ")")) {
n++;
break;
}
}
}
return ParseRes.res(new Parameters(params), n);
}
}

40
src/main/java/me/topchetoeu/jscript/compilation/VariableDeclareNode.java
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@ -4,23 +4,21 @@ import java.util.ArrayList;
import java.util.List;
import me.topchetoeu.jscript.common.Instruction;
import me.topchetoeu.jscript.common.Instruction.BreakpointType;
import me.topchetoeu.jscript.common.parsing.Location;
import me.topchetoeu.jscript.common.parsing.ParseRes;
import me.topchetoeu.jscript.common.parsing.Parsing;
import me.topchetoeu.jscript.common.parsing.Source;
import me.topchetoeu.jscript.compilation.JavaScript.DeclarationType;
import me.topchetoeu.jscript.compilation.scope.Variable;
import me.topchetoeu.jscript.compilation.values.VariableNode;
import me.topchetoeu.jscript.compilation.patterns.Pattern;
public class VariableDeclareNode extends Node {
public static class Pair {
public final String name;
public final Pattern destructor;
public final Node value;
public final Location location;
public Pair(String name, Node value, Location location) {
this.name = name;
public Pair(Pattern destr, Node value, Location location) {
this.destructor = destr;
this.value = value;
this.location = location;
}
@ -32,25 +30,22 @@ public class VariableDeclareNode extends Node {
@Override public void resolve(CompileResult target) {
if (!declType.strict) {
for (var entry : values) {
target.scope.define(new Variable(entry.name, false), entry.location);
entry.destructor.destructDeclResolve(target);
}
}
}
@Override public void compile(CompileResult target, boolean pollute) {
for (var entry : values) {
if (entry.name == null) continue;
if (declType.strict) target.scope.defineStrict(new Variable(entry.name, declType.readonly), entry.location);
if (entry.value != null) {
FunctionNode.compileWithName(entry.value, target, true, entry.name, BreakpointType.STEP_OVER);
target.add(VariableNode.toSet(target, entry.location, entry.name, false, true));
if (entry.value == null) {
if (declType == DeclarationType.VAR) entry.destructor.declare(target, null);
else entry.destructor.declare(target, declType);
}
else target.add(_i -> {
var i = target.scope.get(entry.name, false);
else {
entry.value.compile(target, true);
if (i == null) return Instruction.globDef(entry.name);
else return Instruction.nop();
});
if (declType == DeclarationType.VAR) entry.destructor.destruct(target, null, true);
else entry.destructor.destruct(target, declType, true);
}
}
if (pollute) target.add(Instruction.pushUndefined());
@ -80,13 +75,10 @@ public class VariableDeclareNode extends Node {
while (true) {
var nameLoc = src.loc(i + n);
var name = Parsing.parseIdentifier(src, i + n);
if (!name.isSuccess()) return name.chainError(nameLoc, "Expected a variable name");
n += name.n;
if (!JavaScript.checkVarName(name.result)) {
return ParseRes.error(src.loc(i + n), String.format("Unexpected identifier '%s'", name.result));
}
var name = Pattern.parse(src, i + n, false);
if (!name.isSuccess()) return name.chainError(nameLoc, "Expected a variable name or a destructor");
n += name.n;
Node val = null;
var endN = n;

69
src/main/java/me/topchetoeu/jscript/compilation/destructing/AssignDestructorNode.java
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@ -1,69 +0,0 @@
package me.topchetoeu.jscript.compilation.destructing;
import me.topchetoeu.jscript.common.Instruction;
import me.topchetoeu.jscript.common.Operation;
import me.topchetoeu.jscript.common.parsing.Location;
import me.topchetoeu.jscript.common.parsing.ParseRes;
import me.topchetoeu.jscript.common.parsing.Parsing;
import me.topchetoeu.jscript.common.parsing.Source;
import me.topchetoeu.jscript.compilation.CompileResult;
import me.topchetoeu.jscript.compilation.DeferredIntSupplier;
import me.topchetoeu.jscript.compilation.JavaScript;
import me.topchetoeu.jscript.compilation.Node;
import me.topchetoeu.jscript.compilation.JavaScript.DeclarationType;
import me.topchetoeu.jscript.compilation.scope.Variable;
import me.topchetoeu.jscript.compilation.values.VariableNode;
public class AssignDestructorNode extends Node implements Destructor {
public final String name;
public final Node value;
@Override public void destructDeclResolve(CompileResult target) {
target.scope.define(new Variable(name, false), loc());
}
@Override public void destructArg(CompileResult target) {
var v = target.scope.define(new Variable(name, false), loc());
destructAssign(target);
target.add(_i -> v.index().toSet(false));
}
@Override public void afterAssign(CompileResult target, DeclarationType decl) {
if (decl != null && decl.strict) target.scope.define(new Variable(name, decl.readonly), loc());
var end = new DeferredIntSupplier();
target.add(Instruction.dup());
target.add(Instruction.pushUndefined());
target.add(Instruction.operation(Operation.EQUALS));
target.add(Instruction.jmpIfNot(end));
target.add(Instruction.discard());
value.compile(target, true);
end.set(target.size());
target.add(VariableNode.toSet(target, loc(), name, false, decl != null));
}
public AssignDestructorNode(Location loc, String name, Node value) {
super(loc);
this.name = name;
this.value = value;
}
public static ParseRes<AssignDestructorNode> parse(Source src, int i) {
var n = Parsing.skipEmpty(src, i);
var loc = src.loc(i + n);
var name = Parsing.parseIdentifier(src, i);
if (!JavaScript.checkVarName(null)) return ParseRes.error(src.loc(i + n), String.format("Unexpected keyword '%s'", name.result));
n += name.n;
n += Parsing.skipEmpty(src, i + n);
if (!src.is(i, "=")) return ParseRes.failed();
n++;
var value = JavaScript.parseExpression(src, i, 2);
if (value.isError()) return ParseRes.error(src.loc(i + n), "Expected a value after '='");
n += value.n;
return ParseRes.res(new AssignDestructorNode(loc, name.result, value.result), n);
}
}

4
src/main/java/me/topchetoeu/jscript/compilation/destructing/AssignTarget.java
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@ -1,4 +0,0 @@
package me.topchetoeu.jscript.compilation.destructing;
public interface AssignTarget extends Destructor {
}

38
src/main/java/me/topchetoeu/jscript/compilation/destructing/Destructor.java
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@ -1,38 +0,0 @@
package me.topchetoeu.jscript.compilation.destructing;
import me.topchetoeu.jscript.common.parsing.ParseRes;
import me.topchetoeu.jscript.common.parsing.Parsing;
import me.topchetoeu.jscript.common.parsing.Source;
import me.topchetoeu.jscript.compilation.CompileResult;
import me.topchetoeu.jscript.compilation.JavaScript;
import me.topchetoeu.jscript.compilation.JavaScript.DeclarationType;
import me.topchetoeu.jscript.compilation.values.ObjectDestructorNode;
import me.topchetoeu.jscript.compilation.values.VariableNode;
public interface Destructor {
void destructDeclResolve(CompileResult target);
default void destructArg(CompileResult target) {
beforeAssign(target, null);
afterAssign(target, null);
}
default void beforeAssign(CompileResult target, DeclarationType decl) {}
void afterAssign(CompileResult target, DeclarationType decl, boolean pollute);
public static ParseRes<Destructor> parse(Source src, int i) {
var n = Parsing.skipEmpty(src, i);
ParseRes<Destructor> first = ParseRes.first(src, i + n,
ObjectDestructorNode::parse,
AssignDestructorNode::parse,
VariableNode::parse
);
if (first.isSuccess()) return first.addN(n);
var exp = JavaScript.parseExpression(src, i, 2);
if (!(exp.result instanceof Destructor destructor)) return ParseRes.error(src.loc(i + n), "Expected a destructor expression");
n += exp.n;
return ParseRes.res(destructor, n);
}
}

20
src/main/java/me/topchetoeu/jscript/compilation/destructing/NamedDestructor.java
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@ -1,20 +0,0 @@
package me.topchetoeu.jscript.compilation.destructing;
import me.topchetoeu.jscript.common.parsing.ParseRes;
import me.topchetoeu.jscript.common.parsing.Parsing;
import me.topchetoeu.jscript.common.parsing.Source;
import me.topchetoeu.jscript.compilation.values.VariableNode;
public interface NamedDestructor extends Destructor {
String name();
public static ParseRes<Destructor> parse(Source src, int i) {
var n = Parsing.skipEmpty(src, i);
ParseRes<Destructor> first = ParseRes.first(src, i + n,
AssignDestructorNode::parse,
VariableNode::parse
);
return first.addN(n);
}
}

69
src/main/java/me/topchetoeu/jscript/compilation/patterns/AssignPattern.java Normal file
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@ -0,0 +1,69 @@
package me.topchetoeu.jscript.compilation.patterns;
import me.topchetoeu.jscript.common.Instruction;
import me.topchetoeu.jscript.common.Operation;
import me.topchetoeu.jscript.common.parsing.Location;
import me.topchetoeu.jscript.common.parsing.ParseRes;
import me.topchetoeu.jscript.common.parsing.Parsing;
import me.topchetoeu.jscript.common.parsing.Source;
import me.topchetoeu.jscript.compilation.CompileResult;
import me.topchetoeu.jscript.compilation.JavaScript;
import me.topchetoeu.jscript.compilation.Node;
import me.topchetoeu.jscript.compilation.JavaScript.DeclarationType;
import me.topchetoeu.jscript.runtime.exceptions.SyntaxException;
public class AssignPattern implements Pattern {
public final Location loc;
public final Pattern assignable;
public final Node value;
@Override public Location loc() { return loc; }
@Override public void destructDeclResolve(CompileResult target) {
assignable.destructDeclResolve(target);
}
@Override public void declare(CompileResult target, DeclarationType decl) {
throw new SyntaxException(loc(), "Expected an assignment value for destructor declaration");
}
@Override public void destruct(CompileResult target, DeclarationType decl, boolean shouldDeclare) {
// if (assignable instanceof AssignPattern other) throw new SyntaxException(other.loc(), "Unexpected destruction target");
target.add(Instruction.dup());
target.add(Instruction.pushUndefined());
target.add(Instruction.operation(Operation.EQUALS));
var start = target.temp();
target.add(Instruction.discard());
value.compile(target, true);
target.set(start, Instruction.jmpIfNot(target.size() - start));
assignable.destruct(target, decl, shouldDeclare);
}
public AssignPattern(Location loc, Pattern assignable, Node value) {
this.loc = loc;
this.assignable = assignable;
this.value = value;
}
public static ParseRes<AssignPattern> parse(Source src, int i) {
var n = Parsing.skipEmpty(src, i);
var loc = src.loc(i + n);
var pattern = Pattern.parse(src, i + n, false);
if (!pattern.isSuccess()) return pattern.chainError();
n += pattern.n;
n += Parsing.skipEmpty(src, i + n);
if (!src.is(i + n, "=")) return ParseRes.failed();
n++;
var value = JavaScript.parseExpression(src, i + n, 2);
if (!value.isSuccess()) return value.chainError(src.loc(i + n), "Expected a default value");
n += value.n;
return ParseRes.res(new AssignPattern(loc, pattern.result, value.result), n);
}
}

27
src/main/java/me/topchetoeu/jscript/compilation/patterns/AssignTarget.java Normal file
View File

@ -0,0 +1,27 @@
package me.topchetoeu.jscript.compilation.patterns;
import me.topchetoeu.jscript.common.parsing.Location;
import me.topchetoeu.jscript.compilation.CompileResult;
/**
* Represents all nodes that can be assign targets
*/
public interface AssignTarget extends AssignTargetLike {
Location loc();
/**
* Called to perform calculations before the assigned value is calculated
*/
default void beforeAssign(CompileResult target) {}
/**
* Called to perform the actual assignemnt. Between the `beforeAssign` and this call a single value will have been pushed to the stack
* @param pollute Whether or not to leave the original value on the stack
*/
void afterAssign(CompileResult target, boolean pollute);
default void assign(CompileResult target, boolean pollute) {
afterAssign(target, pollute);
}
@Override default AssignTarget toAssignTarget() { return this; }
}

8
src/main/java/me/topchetoeu/jscript/compilation/patterns/AssignTargetLike.java Normal file
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@ -0,0 +1,8 @@
package me.topchetoeu.jscript.compilation.patterns;
/**
* Represents all nodes that can be assign targets
*/
public interface AssignTargetLike {
AssignTarget toAssignTarget();
}

3
src/main/java/me/topchetoeu/jscript/compilation/destructing/ChangeTarget.java → src/main/java/me/topchetoeu/jscript/compilation/patterns/ChangeTarget.java
View File

@ -1,8 +1,7 @@
package me.topchetoeu.jscript.compilation.destructing;
package me.topchetoeu.jscript.compilation.patterns;
import me.topchetoeu.jscript.compilation.CompileResult;
public interface ChangeTarget extends AssignTarget {
void beforeChange(CompileResult target);
void afterChange(CompileResult target, boolean pollute);
}

15
src/main/java/me/topchetoeu/jscript/compilation/patterns/NamedDestructor.java Normal file
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@ -0,0 +1,15 @@
package me.topchetoeu.jscript.compilation.patterns;
public interface NamedDestructor extends Pattern {
String name();
// public static ParseRes<Destructor> parse(Source src, int i) {
// var n = Parsing.skipEmpty(src, i);
// ParseRes<Destructor> first = ParseRes.first(src, i + n,
// AssignDestructorNode::parse,
// VariableNode::parse
// );
// return first.addN(n);
// }
}

16
src/main/java/me/topchetoeu/jscript/compilation/patterns/ObjectAssignable.java Normal file
View File

@ -0,0 +1,16 @@
package me.topchetoeu.jscript.compilation.patterns;
import java.util.List;
import me.topchetoeu.jscript.common.parsing.Location;
import me.topchetoeu.jscript.compilation.CompileResult;
public class ObjectAssignable extends ObjectDestructor<AssignTarget> implements AssignTarget {
@Override public void afterAssign(CompileResult target, boolean pollute) {
compile(target, t -> t.assign(target, false), pollute);
}
public ObjectAssignable(Location loc, List<Member<AssignTarget>> members) {
super(loc, members);
}
}

44
src/main/java/me/topchetoeu/jscript/compilation/patterns/ObjectDestructor.java Normal file
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@ -0,0 +1,44 @@
package me.topchetoeu.jscript.compilation.patterns;
import java.util.List;
import java.util.function.Consumer;
import me.topchetoeu.jscript.common.Instruction;
import me.topchetoeu.jscript.common.parsing.Location;
import me.topchetoeu.jscript.compilation.CompileResult;
import me.topchetoeu.jscript.compilation.Node;
import me.topchetoeu.jscript.compilation.values.operations.IndexNode;
public abstract class ObjectDestructor<T> extends Node {
public static final class Member<T> {
public final Node key;
public final T consumable;
public Member(Node key, T consumer) {
this.key = key;
this.consumable = consumer;
}
}
public final List<Member<T>> members;
public void consume(Consumer<T> consumer) {
for (var el : members) {
consumer.accept(el.consumable);
}
}
public void compile(CompileResult target, Consumer<T> consumer, boolean pollute) {
for (var el : members) {
target.add(Instruction.dup());
IndexNode.indexLoad(target, el.key, true);
consumer.accept(el.consumable);
}
if (!pollute) target.add(Instruction.discard());
}
public ObjectDestructor(Location loc, List<Member<T>> members) {
super(loc);
this.members = members;
}
}

118
src/main/java/me/topchetoeu/jscript/compilation/patterns/ObjectPattern.java Normal file
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@ -0,0 +1,118 @@
package me.topchetoeu.jscript.compilation.patterns;
import java.util.LinkedList;
import java.util.List;
import me.topchetoeu.jscript.common.parsing.Location;
import me.topchetoeu.jscript.common.parsing.ParseRes;
import me.topchetoeu.jscript.common.parsing.Parsing;
import me.topchetoeu.jscript.common.parsing.Source;
import me.topchetoeu.jscript.compilation.CompileResult;
import me.topchetoeu.jscript.compilation.JavaScript.DeclarationType;
import me.topchetoeu.jscript.compilation.values.ObjectNode;
import me.topchetoeu.jscript.compilation.values.VariableNode;
import me.topchetoeu.jscript.compilation.values.constants.StringNode;
import me.topchetoeu.jscript.runtime.exceptions.SyntaxException;
public class ObjectPattern extends ObjectDestructor<Pattern> implements Pattern {
@Override public void destructDeclResolve(CompileResult target) {
consume(t -> t.destructDeclResolve(target));
}
@Override public void destruct(CompileResult target, DeclarationType decl, boolean shouldDeclare) {
compile(target, t -> t.destruct(target, decl, shouldDeclare), false);
}
@Override public void declare(CompileResult target, DeclarationType decl) {
throw new SyntaxException(loc(), "Object pattern must be initialized");
}
public ObjectPattern(Location loc, List<Member<Pattern>> members) {
super(loc, members);
}
private static ParseRes<Member<Pattern>> parseShorthand(Source src, int i) {
ParseRes<Pattern> res = ParseRes.first(src, i,
AssignPattern::parse,
VariableNode::parse
);
if (res.isSuccess()) {
if (res.result instanceof AssignPattern assign) {
if (assign.assignable instanceof VariableNode var) {
return ParseRes.res(new Member<>(new StringNode(var.loc(), var.name), res.result), res.n);
}
}
else if (res.result instanceof VariableNode var) {
return ParseRes.res(new Member<>(new StringNode(var.loc(), var.name), res.result), res.n);
}
}
return res.chainError();
}
private static ParseRes<Member<Pattern>> parseKeyed(Source src, int i) {
var n = Parsing.skipEmpty(src, i);
var key = ObjectNode.parsePropName(src, i + n);
if (!key.isSuccess()) return key.chainError();
n += key.n;
n += Parsing.skipEmpty(src, i + n);
if (!src.is(i + n , ":")) return ParseRes.failed();
n++;
ParseRes<Pattern> res = Pattern.parse(src, i + n, true);
if (!res.isSuccess()) return ParseRes.error(src.loc(i + n), "Expected a pattern after colon");
n += res.n;
return ParseRes.res(new Member<>(key.result, res.result), n);
}
public static ParseRes<ObjectPattern> parse(Source src, int i) {
var n = Parsing.skipEmpty(src, i);
var loc = src.loc(i + n);
if (!src.is(i + n, "{")) return ParseRes.failed();
n++;
n += Parsing.skipEmpty(src, i + n);
var members = new LinkedList<Member<Pattern>>();
if (src.is(i + n, "}")) {
n++;
return ParseRes.res(new ObjectPattern(loc, members), n);
}
while (true) {
ParseRes<Member<Pattern>> prop = ParseRes.first(src, i + n,
ObjectPattern::parseKeyed,
ObjectPattern::parseShorthand
);
if (!prop.isSuccess()) return prop.chainError(src.loc(i + n), "Expected a member in object pattern");
n += prop.n;
members.add(prop.result);
n += Parsing.skipEmpty(src, i + n);
if (src.is(i + n, ",")) {
n++;
n += Parsing.skipEmpty(src, i + n);
if (src.is(i + n, "}")) {
n++;
break;
}
continue;
}
else if (src.is(i + n, "}")) {
n++;
break;
}
else ParseRes.error(src.loc(i + n), "Expected a comma or a closing brace.");
}
return ParseRes.res(new ObjectPattern(loc, members), n);
}
}

47
src/main/java/me/topchetoeu/jscript/compilation/patterns/Pattern.java Normal file
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@ -0,0 +1,47 @@
package me.topchetoeu.jscript.compilation.patterns;
import me.topchetoeu.jscript.common.parsing.Location;
import me.topchetoeu.jscript.common.parsing.ParseRes;
import me.topchetoeu.jscript.common.parsing.Source;
import me.topchetoeu.jscript.compilation.CompileResult;
import me.topchetoeu.jscript.compilation.JavaScript.DeclarationType;
import me.topchetoeu.jscript.compilation.values.VariableNode;
/**
* Represents all nodes that can be a destructors (note that all destructors are assign targets, too)
*/
public interface Pattern extends PatternLike {
Location loc();
/**
* Called when the destructor has to declare
* @param target
*/
void destructDeclResolve(CompileResult target);
/**
* Called when a declaration-like is being destructed
* @param decl The variable type the destructor must declare, if it is a named pne
*/
void destruct(CompileResult target, DeclarationType decl, boolean shouldDeclare);
/**
* Run when destructing a declaration without an initializer
*/
void declare(CompileResult target, DeclarationType decl);
public static ParseRes<Pattern> parse(Source src, int i, boolean withDefault) {
return withDefault ?
ParseRes.first(src, i,
AssignPattern::parse,
ObjectPattern::parse,
VariableNode::parse
) :
ParseRes.first(src, i,
ObjectPattern::parse,
VariableNode::parse
);
}
@Override default Pattern toPattern() { return this; }
}

5
src/main/java/me/topchetoeu/jscript/compilation/patterns/PatternLike.java Normal file
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@ -0,0 +1,5 @@
package me.topchetoeu.jscript.compilation.patterns;
public interface PatternLike {
Pattern toPattern();
}

20
src/main/java/me/topchetoeu/jscript/compilation/scope/Scope.java
View File

@ -4,6 +4,7 @@ import java.util.HashMap;
import java.util.LinkedList;
import me.topchetoeu.jscript.common.parsing.Location;
import me.topchetoeu.jscript.compilation.JavaScript.DeclarationType;
import me.topchetoeu.jscript.runtime.exceptions.SyntaxException;
public class Scope {
@ -41,15 +42,6 @@ public class Scope {
return var;
}
// private final int parentVarOffset() {
// if (parent != null) return parent.variableOffset();
// else return 0;
// }
// private final int parentCapOffset() {
// if (parent != null) return parent.capturedOffset();
// else return localsCount();
// }
protected final SyntaxException alreadyDefinedErr(Location loc, String name) {
return new SyntaxException(loc, String.format("Identifier '%s' has already been declared", name));
}
@ -141,9 +133,6 @@ public class Scope {
}
return res;
// if (parent != null) return parent.variableOffset() + variables.size();
// else return variables.size();
}
public final int capturablesOffset() {
var res = 0;
@ -154,8 +143,11 @@ public class Scope {
}
return res;
// if (parent != null) return parent.capturedOffset() + captured.size();
// else return localsCount() + captured.size();
}
public final Variable define(DeclarationType type, String name, Location loc) {
if (type.strict) return defineStrict(new Variable(name, type.readonly), loc);
else return define(new Variable(name, type.readonly), loc);
}
public int localsCount() {

199
src/main/java/me/topchetoeu/jscript/compilation/values/ObjectDestructorNode.java
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@ -1,199 +0,0 @@
package me.topchetoeu.jscript.compilation.values;
import java.util.LinkedHashMap;
import java.util.Map;
import me.topchetoeu.jscript.common.Instruction;
import me.topchetoeu.jscript.common.parsing.Location;
import me.topchetoeu.jscript.common.parsing.ParseRes;
import me.topchetoeu.jscript.common.parsing.Parsing;
import me.topchetoeu.jscript.common.parsing.Source;
import me.topchetoeu.jscript.compilation.CompileResult;
import me.topchetoeu.jscript.compilation.Node;
import me.topchetoeu.jscript.compilation.JavaScript.DeclarationType;
import me.topchetoeu.jscript.compilation.destructing.Destructor;
public class ObjectDestructorNode extends Node implements Destructor {
public final LinkedHashMap<String, Destructor> destructors;
public final VariableNode restDestructor;
private void compileRestObjBuilder(CompileResult target, int srcDupN) {
var subtarget = target.subtarget();
var src = subtarget.scope.defineTemp();
var dst = subtarget.scope.defineTemp();
target.add(Instruction.loadObj());
target.add(_i -> src.index().toSet(true));
target.add(_i -> dst.index().toSet(destructors.size() > 0));
target.add(Instruction.keys(true, true));
var start = target.size();
target.add(Instruction.dup());
var mid = target.temp();
target.add(_i -> src.index().toGet());
target.add(Instruction.dup(1, 1));
target.add(Instruction.loadMember());
target.add(_i -> dst.index().toGet());
target.add(Instruction.dup(1, 1));
target.add(Instruction.storeMember());
target.add(Instruction.discard());
var end = target.size();
target.add(Instruction.jmp(start - end));
target.set(mid, Instruction.jmpIfNot(end - mid + 1));
target.add(Instruction.discard());
target.add(Instruction.dup(srcDupN, 1));
target.scope.end();
}
@Override public void destructDeclResolve(CompileResult target) {
for (var el : destructors.values()) {
el.destructDeclResolve(target);
}
if (restDestructor != null) restDestructor.destructDeclResolve(target);
}
@Override public void destructArg(CompileResult target) {
if (restDestructor != null) compileRestObjBuilder(target, destructors.size() * 2);
else if (destructors.size() > 0) target.add(Instruction.dup(destructors.size(), 0));
for (var el : destructors.entrySet()) {
if (restDestructor != null) {
target.add(Instruction.pushValue(el.getKey()));
target.add(Instruction.delete());
}
target.add(Instruction.loadMember(el.getKey()));
el.getValue().destructArg(target);
}
if (restDestructor != null) restDestructor.destructArg(target);
target.add(Instruction.discard());
}
@Override public void afterAssign(CompileResult target, DeclarationType decl) {
if (restDestructor != null) compileRestObjBuilder(target, destructors.size() * 2);
else if (destructors.size() > 0) target.add(Instruction.dup(destructors.size(), 0));
for (var el : destructors.entrySet()) {
if (restDestructor != null) {
target.add(Instruction.pushValue(el.getKey()));
target.add(Instruction.delete());
}
target.add(Instruction.loadMember(el.getKey()));
el.getValue().afterAssign(target, decl);
}
if (restDestructor != null) restDestructor.afterAssign(target, decl);
target.add(Instruction.discard());
}
@Override public void destructAssign(CompileResult target, boolean pollute) {
if (restDestructor != null) compileRestObjBuilder(target, destructors.size() * 2);
else if (destructors.size() > 0) target.add(Instruction.dup(destructors.size(), 0));
for (var el : destructors.entrySet()) {
if (restDestructor != null) {
target.add(Instruction.pushValue(el.getKey()));
target.add(Instruction.delete());
}
target.add(Instruction.loadMember(el.getKey()));
el.getValue().destructAssign(target, pollute);
}
if (restDestructor != null) restDestructor.destructAssign(target, pollute);
if (!pollute) target.add(Instruction.discard());
}
public ObjectDestructorNode(Location loc, Map<String, Destructor> map, VariableNode rest) {
super(loc);
this.destructors = new LinkedHashMap<>(map);
this.restDestructor = rest;
}
public ObjectDestructorNode(Location loc, Map<String, Destructor> map) {
super(loc);
this.destructors = new LinkedHashMap<>(map);
this.restDestructor = null;
}
private static ParseRes<String> parsePropName(Source src, int i) {
var n = Parsing.skipEmpty(src, i);
var res = ParseRes.first(src, i + n,
Parsing::parseIdentifier,
Parsing::parseString,
(s, j) -> Parsing.parseNumber(s, j, false)
);
if (!res.isSuccess()) return res.chainError();
n += res.n;
if (!src.is(i + n, ":")) return ParseRes.error(src.loc(i + n), "Expected a colon");
n++;
return ParseRes.res(res.result.toString(), n);
}
public static ParseRes<ObjectDestructorNode> parse(Source src, int i) {
var n = Parsing.skipEmpty(src, i);
var loc = src.loc(i + n);
if (!src.is(i + n, "{")) return ParseRes.failed();
n++;
n += Parsing.skipEmpty(src, i + n);
var destructors = new LinkedHashMap<String, Destructor>();
if (src.is(i + n, "}")) {
n++;
return ParseRes.res(new ObjectDestructorNode(loc, destructors), n);
}
while (true) {
n += Parsing.skipEmpty(src, i + n);
// if (src.is(i, null))
var name = parsePropName(src, i + n);
if (!name.isSuccess()) return ParseRes.error(src.loc(i + n), "Expected a field name");
n += name.n;
n += Parsing.skipEmpty(src, i + n);
var destructor = Destructor.parse(src, i + n);
if (!destructor.isSuccess()) return destructor.chainError(src.loc(i + n), "Expected a value in array list");
n += destructor.n;
destructors.put(name.result, destructor.result);
n += Parsing.skipEmpty(src, i + n);
if (src.is(i + n, ",")) {
n++;
n += Parsing.skipEmpty(src, i + n);
if (src.is(i + n, "}")) {
n++;
break;
}
continue;
}
else if (src.is(i + n, "}")) {
n++;
break;
}
else ParseRes.error(src.loc(i + n), "Expected a comma or a closing brace.");
}
return ParseRes.res(new ObjectDestructorNode(loc, destructors), n);
}
}

402
src/main/java/me/topchetoeu/jscript/compilation/values/ObjectNode.java
View File

@ -1,10 +1,10 @@
package me.topchetoeu.jscript.compilation.values;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.LinkedList;
import java.util.List;
import me.topchetoeu.jscript.common.Instruction;
import me.topchetoeu.jscript.common.Instruction.BreakpointType;
import me.topchetoeu.jscript.common.parsing.Location;
import me.topchetoeu.jscript.common.parsing.ParseRes;
import me.topchetoeu.jscript.common.parsing.Parsing;
@ -12,105 +12,308 @@ import me.topchetoeu.jscript.common.parsing.Source;
import me.topchetoeu.jscript.compilation.CompileResult;
import me.topchetoeu.jscript.compilation.CompoundNode;
import me.topchetoeu.jscript.compilation.FunctionNode;
import me.topchetoeu.jscript.compilation.FunctionValueNode;
import me.topchetoeu.jscript.compilation.JavaScript;
import me.topchetoeu.jscript.compilation.Node;
import me.topchetoeu.jscript.compilation.destructing.Destructor;
import me.topchetoeu.jscript.compilation.Parameters;
import me.topchetoeu.jscript.compilation.patterns.AssignTarget;
import me.topchetoeu.jscript.compilation.patterns.AssignTargetLike;
import me.topchetoeu.jscript.compilation.patterns.ObjectAssignable;
import me.topchetoeu.jscript.compilation.patterns.Pattern;
import me.topchetoeu.jscript.compilation.patterns.ObjectDestructor.Member;
import me.topchetoeu.jscript.compilation.values.constants.NumberNode;
import me.topchetoeu.jscript.compilation.values.constants.StringNode;
import me.topchetoeu.jscript.compilation.values.operations.AssignNode;
import me.topchetoeu.jscript.runtime.exceptions.SyntaxException;
public class ObjectNode extends Node implements AssignTargetLike {
public static class PropertyMemberNode extends FunctionNode {
public final Node key;
public final Pattern argument;
public class ObjectNode extends Node implements Destructor {
public static class ObjProp {
public final String name;
public final String access;
public final FunctionValueNode func;
@Override public String name() {
if (key instanceof StringNode str) {
if (isGetter()) return "get " + str.value;
else return "set " + str.value;
}
else return null;
}
public ObjProp(String name, String access, FunctionValueNode func) {
this.name = name;
this.access = access;
this.func = func;
public boolean isGetter() { return argument == null; }
public boolean isSetter() { return argument != null; }
@Override public void compile(CompileResult target, boolean pollute, String name, BreakpointType bp) {
key.compile(target, true);
var id = target.addChild(compileBody(target, name, null));
target.add(_i -> Instruction.loadFunc(id, true, false, false, name, captures(id, target)));
target.add(Instruction.defProp(isSetter()));
}
public PropertyMemberNode(Location loc, Location end, Node key, Pattern argument, CompoundNode body) {
super(loc, end, argument == null ? new Parameters(List.of()) : new Parameters(List.of(argument)), body);
this.key = key;
this.argument = argument;
}
public static ParseRes<PropertyMemberNode> parse(Source src, int i) {
var n = Parsing.skipEmpty(src, i);
var loc = src.loc(i + n);
var access = Parsing.parseIdentifier(src, i + n);
if (!access.isSuccess()) return ParseRes.failed();
if (!access.result.equals("get") && !access.result.equals("set")) return ParseRes.failed();
n += access.n;
var name = parsePropName(src, i + n);
if (!name.isSuccess()) return name.chainError(src.loc(i + n), "Expected a property name after '" + access + "'");
n += name.n;
var params = Parameters.parseParameters(src, i + n);
if (!params.isSuccess()) return params.chainError(src.loc(i + n), "Expected an argument list");
if (access.result.equals("get") && params.result.params.size() != 0) return ParseRes.error(src.loc(i + n), "Getter must not have any parameters");
if (access.result.equals("set") && params.result.params.size() != 1) return ParseRes.error(src.loc(i + n), "Setter must have exactly one parameter");
if (params.result.rest != null) return ParseRes.error(params.result.rest.loc(), "Property members may not have rest arguments");
n += params.n;
var body = CompoundNode.parse(src, i + n);
if (!body.isSuccess()) return body.chainError(src.loc(i + n), "Expected a compound statement for property accessor.");
n += body.n;
var end = src.loc(i + n - 1);
return ParseRes.res(new PropertyMemberNode(
loc, end, name.result, access.result.equals("get") ? null : params.result.params.get(0), body.result
), n);
}
}
public static class MethodMemberNode extends FunctionNode {
public final Node key;
@Override public String name() {
if (key instanceof StringNode str) return str.value;
else return null;
}
@Override public void compile(CompileResult target, boolean pollute, String name, BreakpointType bp) {
key.compile(target, true);
var id = target.addChild(compileBody(target, name, null));
target.add(_i -> Instruction.loadFunc(id, true, false, false, name, captures(id, target)));
target.add(Instruction.defField());
}
public MethodMemberNode(Location loc, Location end, Node key, Parameters params, CompoundNode body) {
super(loc, end, params, body);
this.key = key;
}
public static ParseRes<MethodMemberNode> parse(Source src, int i) {
var n = Parsing.skipEmpty(src, i);
var loc = src.loc(i + n);
var name = parsePropName(src, i + n);
if (!name.isSuccess()) return name.chainError();
n += name.n;
var params = Parameters.parseParameters(src, i + n);
if (!params.isSuccess()) return params.chainError(src.loc(i + n), "Expected an argument list");
n += params.n;
var body = CompoundNode.parse(src, i + n);
if (!body.isSuccess()) return body.chainError(src.loc(i + n), "Expected a compound statement for property accessor.");
n += body.n;
var end = src.loc(i + n - 1);
return ParseRes.res(new MethodMemberNode(
loc, end, name.result, params.result, body.result
), n);
}
}
public static class FieldMemberNode extends Node {
public final Node key;
public final Node value;
@Override public void compile(CompileResult target, boolean pollute, BreakpointType bp) {
key.compile(target, true);
if (value == null) target.add(Instruction.pushUndefined());
else value.compile(target, true);
target.add(Instruction.defField());
}
public FieldMemberNode(Location loc, Node key, Node value) {
super(loc);
this.key = key;
this.value = value;
}
public static ParseRes<FieldMemberNode> parseObject(Source src, int i) {
var n = Parsing.skipEmpty(src, i);
var loc = src.loc(i + n);
var name = parsePropName(src, i + n);
if (!name.isSuccess()) return name.chainError();
n += name.n;
n += Parsing.skipEmpty(src, i + n);
if (!src.is(i + n, ":")) return ParseRes.failed();
n++;
var value = JavaScript.parseExpression(src, i + n, 2);
if (!value.isSuccess()) return value.chainError(src.loc(i + n), "Expected a value");
n += value.n;
return ParseRes.res(new FieldMemberNode(loc, name.result, value.result), n);
}
public static ParseRes<FieldMemberNode> parseShorthand(Source src, int i) {
var n = Parsing.skipEmpty(src, i);
var loc = src.loc(i + n);
var var = VariableNode.parse(src, i + n);
if (!var.isSuccess()) return var.chainError();
n += var.n;
if (!src.is(i + n, "=")) return ParseRes.res(new FieldMemberNode(loc, new StringNode(loc, var.result.name), var.result), n);
var equalsLoc = src.loc(i + n);
n++;
var value = JavaScript.parseExpression(src, i + n, 2);
if (!value.isSuccess()) return value.chainError(src.loc(i + n), "Expected a shorthand initializer");
n += value.n;
return ParseRes.res(new FieldMemberNode(loc, new StringNode(loc, var.result.name), new AssignNode(equalsLoc, var.result, value.result)), n);
}
public static ParseRes<FieldMemberNode> parseClass(Source src, int i) {
var n = Parsing.skipEmpty(src, i);
var loc = src.loc(i + n);
var name = parsePropName(src, i + n);
if (!name.isSuccess()) return name.chainError();
n += name.n;
n += Parsing.skipEmpty(src, i + n);
if (!src.is(i + n, "=")) {
var end = JavaScript.parseStatement(src, i + n);
if (!end.isSuccess()) return ParseRes.error(src.loc(i + n), "Expected an end of statement or a field initializer");
n += end.n;
return ParseRes.res(new FieldMemberNode(loc, name.result, null), n);
}
n++;
var value = JavaScript.parseExpression(src, i + n, 2);
if (!value.isSuccess()) return value.chainError(src.loc(i + n), "Expected a value");
n += value.n;
return ParseRes.res(new FieldMemberNode(loc, name.result, value.result), n);
}
}
public final Map<String, Node> map;
public final Map<String, FunctionNode> getters;
public final Map<String, FunctionNode> setters;
public final List<Node> members;
// private void compileRestObjBuilder(CompileResult target, int srcDupN) {
// var subtarget = target.subtarget();
// var src = subtarget.scope.defineTemp();
// var dst = subtarget.scope.defineTemp();
// target.add(Instruction.loadObj());
// target.add(_i -> src.index().toSet(true));
// target.add(_i -> dst.index().toSet(destructors.size() > 0));
// target.add(Instruction.keys(true, true));
// var start = target.size();
// target.add(Instruction.dup());
// var mid = target.temp();
// target.add(_i -> src.index().toGet());
// target.add(Instruction.dup(1, 1));
// target.add(Instruction.loadMember());
// target.add(_i -> dst.index().toGet());
// target.add(Instruction.dup(1, 1));
// target.add(Instruction.storeMember());
// target.add(Instruction.discard());
// var end = target.size();
// target.add(Instruction.jmp(start - end));
// target.set(mid, Instruction.jmpIfNot(end - mid + 1));
// target.add(Instruction.discard());
// target.add(Instruction.dup(srcDupN, 1));
// target.scope.end();
// }
// @Override public void destruct(CompileResult target, DeclarationType decl) {
// if (getters.size() > 0) throw new SyntaxException(getters.values().iterator().next().loc(), "Unexpected getter in destructor");
// if (setters.size() > 0) throw new SyntaxException(setters.values().iterator().next().loc(), "Unexpected setter in destructor");
// }
@Override public void compile(CompileResult target, boolean pollute) {
target.add(Instruction.loadObj());
for (var el : map.entrySet()) {
for (var el : members) {
target.add(Instruction.dup());
var val = el.getValue();
FunctionNode.compileWithName(val, target, true, el.getKey().toString());
target.add(Instruction.storeMember(el.getKey()));
el.compile(target, false);
}
var keys = new ArrayList<Object>();
keys.addAll(getters.keySet());
keys.addAll(setters.keySet());
for (var key : keys) {
target.add(Instruction.pushValue((String)key));
if (getters.containsKey(key)) getters.get(key).compile(target, true);
else target.add(Instruction.pushUndefined());
if (setters.containsKey(key)) setters.get(key).compile(target, true);
else target.add(Instruction.pushUndefined());
target.add(Instruction.defProp());
}
if (!pollute) target.add(Instruction.discard());
}
public ObjectNode(Location loc, Map<String, Node> map, Map<String, FunctionNode> getters, Map<String, FunctionNode> setters) {
@Override public AssignTarget toAssignTarget() {
var newMembers = new LinkedList<Member<AssignTarget>>();
for (var el : members) {
if (el instanceof FieldMemberNode field) {
if (field.value instanceof AssignTargetLike target) newMembers.add(new Member<>(field.key, target.toAssignTarget()));
else throw new SyntaxException(field.value.loc(), "Expected an assignable in deconstructor");
}
else throw new SyntaxException(el.loc(), "Unexpected member in deconstructor");
}
return new ObjectAssignable(loc(), newMembers);
}
public ObjectNode(Location loc, List<Node> map) {
super(loc);
this.map = map;
this.getters = getters;
this.setters = setters;
this.members = map;
}
private static ParseRes<String> parsePropName(Source src, int i) {
private static ParseRes<Node> parseComputePropName(Source src, int i) {
var n = Parsing.skipEmpty(src, i);
if (!src.is(i + n, "[")) return ParseRes.failed();
n++;
var res = ParseRes.first(src, i + n,
Parsing::parseIdentifier,
Parsing::parseString,
(s, j) -> Parsing.parseNumber(s, j, false)
var val = JavaScript.parseExpression(src, i, 0);
if (!val.isSuccess()) return val.chainError(src.loc(i + n), "Expected an expression in compute property");
n += val.n;
n += Parsing.skipEmpty(src, i + n);
if (!src.is(i + n, "]")) return ParseRes.error(src.loc(i + n), "Expected a closing bracket after compute property");
n++;
return ParseRes.res(val.result, n);
}
public static ParseRes<Node> parsePropName(Source src, int i) {
return ParseRes.first(src, i,
(s, j) -> {
var m = Parsing.skipEmpty(s, j);
var l = s.loc(j + m);
var r = Parsing.parseIdentifier(s, j + m);
if (r.isSuccess()) return ParseRes.res(new StringNode(l, r.result), r.n);
else return r.chainError();
},
StringNode::parse,
NumberNode::parse,
ObjectNode::parseComputePropName
);
n += res.n;
if (!res.isSuccess()) return res.chainError();
return ParseRes.res(res.result.toString(), n);
}
private static ParseRes<ObjectNode.ObjProp> parseObjectProp(Source src, int i) {
var n = Parsing.skipEmpty(src, i);
var loc = src.loc(i + n);
var access = Parsing.parseIdentifier(src, i + n);
if (!access.isSuccess()) return ParseRes.failed();
if (!access.result.equals("get") && !access.result.equals("set")) return ParseRes.failed();
n += access.n;
var name = parsePropName(src, i + n);
if (!name.isSuccess()) return name.chainError(src.loc(i + n), "Expected a property name after '" + access + "'");
n += name.n;
var params = JavaScript.parseParameters(src, i + n);
if (!params.isSuccess()) return params.chainError(src.loc(i + n), "Expected an argument list");
n += params.n;
var body = CompoundNode.parse(src, i + n);
if (!body.isSuccess()) return body.chainError(src.loc(i + n), "Expected a compound statement for property accessor.");
n += body.n;
var end = src.loc(i + n - 1);
return ParseRes.res(new ObjProp(
name.result, access.result,
new FunctionValueNode(loc, end, params.result, body.result, access + " " + name.result.toString())
), n);
}
public static ParseRes<ObjectNode> parse(Source src, int i) {
@ -121,39 +324,23 @@ public class ObjectNode extends Node implements Destructor {
n++;
n += Parsing.skipEmpty(src, i + n);
var values = new LinkedHashMap<String, Node>();
var getters = new LinkedHashMap<String, FunctionNode>();
var setters = new LinkedHashMap<String, FunctionNode>();
var members = new LinkedList<Node>();
if (src.is(i + n, "}")) {
n++;
return ParseRes.res(new ObjectNode(loc, values, getters, setters), n);
return ParseRes.res(new ObjectNode(loc, members), n);
}
while (true) {
var prop = parseObjectProp(src, i + n);
ParseRes<Node> prop = ParseRes.first(src, i + n,
MethodMemberNode::parse,
PropertyMemberNode::parse,
FieldMemberNode::parseObject
);
if (!prop.isSuccess()) return prop.chainError(src.loc(i + n), "Expected a member in object literal");
n += prop.n;
if (prop.isSuccess()) {
n += prop.n;
if (prop.result.access.equals("set")) setters.put(prop.result.name, prop.result.func);
else getters.put(prop.result.name, prop.result.func);
}
else {
var name = parsePropName(src, i + n);
if (!name.isSuccess()) return prop.chainError(src.loc(i + n), "Expected a field name");
n += name.n;
n += Parsing.skipEmpty(src, i + n);
if (!src.is(i + n, ":")) return ParseRes.error(src.loc(i + n), "Expected a colon");
n++;
var valRes = JavaScript.parseExpression(src, i + n, 2);
if (!valRes.isSuccess()) return valRes.chainError(src.loc(i + n), "Expected a value after property key");
n += valRes.n;
values.put(name.result, valRes.result);
}
members.add(prop.result);
n += Parsing.skipEmpty(src, i + n);
if (src.is(i + n, ",")) {
@ -174,7 +361,6 @@ public class ObjectNode extends Node implements Destructor {
else ParseRes.error(src.loc(i + n), "Expected a comma or a closing brace.");
}
return ParseRes.res(new ObjectNode(loc, values, getters, setters), n);
return ParseRes.res(new ObjectNode(loc, members), n);
}
}

74
src/main/java/me/topchetoeu/jscript/compilation/values/VariableNode.java
View File

@ -1,53 +1,73 @@
package me.topchetoeu.jscript.compilation.values;
import java.util.function.IntFunction;
import java.util.function.Supplier;
import me.topchetoeu.jscript.common.Instruction;
import me.topchetoeu.jscript.common.parsing.Location;
import me.topchetoeu.jscript.common.parsing.ParseRes;
import me.topchetoeu.jscript.common.parsing.Parsing;
import me.topchetoeu.jscript.common.parsing.Source;
import me.topchetoeu.jscript.compilation.AssignableNode;
import me.topchetoeu.jscript.compilation.CompileResult;
import me.topchetoeu.jscript.compilation.JavaScript;
import me.topchetoeu.jscript.compilation.Node;
import me.topchetoeu.jscript.compilation.JavaScript.DeclarationType;
import me.topchetoeu.jscript.compilation.patterns.ChangeTarget;
import me.topchetoeu.jscript.compilation.patterns.Pattern;
import me.topchetoeu.jscript.compilation.scope.Variable;
import me.topchetoeu.jscript.runtime.exceptions.SyntaxException;
public class VariableNode extends Node implements AssignTarget {
public class VariableNode extends Node implements Pattern, ChangeTarget {
public final String name;
@Override public String assignName() { return name; }
public String assignName() { return name; }
@Override public void compileBeforeAssign(CompileResult target, boolean operator) {
if (operator) {
target.add(VariableNode.toGet(target, loc(), name));
}
}
@Override public void compileAfterAssign(CompileResult target, boolean operator, boolean pollute) {
target.add(VariableNode.toSet(target, loc(), name, pollute, false));
// @Override public void compileBeforeAssign(CompileResult target, boolean operator) {
// if (operator) {
// target.add(VariableNode.toGet(target, loc(), name));
// }
// }
// @Override public void compileAfterAssign(CompileResult target, boolean operator, boolean pollute) {
// target.add(VariableNode.toSet(target, loc(), name, pollute, false));
// }
@Override public void beforeChange(CompileResult target) {
target.add(VariableNode.toGet(target, loc(), name));
}
@Override public void destructArg(CompileResult target) {
target.add(_i -> target.scope.define(new Variable(name, false), loc()).index().toSet(false));
}
// @Override public void destructArg(CompileResult target) {
// target.add(_i -> target.scope.define(new Variable(name, false), loc()).index().toSet(false));
// }
@Override public void destructDeclResolve(CompileResult target) {
target.scope.define(new Variable(name, false), loc());
}
@Override public void afterAssign(CompileResult target, DeclarationType decl) {
if (decl.strict) {
var v = target.scope.defineStrict(new Variable(name, decl.readonly), loc());
target.add(_i -> v.index().toSet(false));
@Override public void afterAssign(CompileResult target, boolean pollute) {
target.add(VariableNode.toSet(target, loc(), name, pollute, false));
}
@Override public void declare(CompileResult target, DeclarationType decl) {
if (decl != null) {
if (decl.strict) target.scope.defineStrict(new Variable(name, decl.readonly), loc());
else target.scope.define(new Variable(name, decl.readonly), loc());
}
else target.add(_i -> {
var i = target.scope.get(name, false);
if (i == null) return Instruction.globDef(name);
else return Instruction.nop();
});
}
@Override public void destruct(CompileResult target, DeclarationType decl, boolean shouldDeclare) {
if (!shouldDeclare || decl == null) {
target.add(VariableNode.toSet(target, loc(), name, false, shouldDeclare));
}
else {
target.add(VariableNode.toSet(target, loc(), name, false, true));
if (decl == DeclarationType.VAR && target.scope.has(name, false)) throw new SyntaxException(loc(), "Duplicate parameter name not allowed");
var v = target.scope.define(decl, name, loc());
target.add(_i -> v.index().toSet(false));
}
}
@Override public void destructAssign(CompileResult target, boolean pollute) {
target.add(VariableNode.toSet(target, loc(), name, pollute, false));
}
@Override public void compile(CompileResult target, boolean pollute) {
var i = target.scope.get(name, false);
@ -55,7 +75,7 @@ public class VariableNode extends Node implements AssignTarget {
if (i == null) {
target.add(_i -> {
if (target.scope.has(name, false)) return Instruction.throwSyntax(loc(), String.format("Cannot access '%s' before initialization", name));
return Instruction.globGet(name);
return Instruction.globGet(name, false);
});
if (!pollute) target.add(Instruction.discard());
@ -63,18 +83,18 @@ public class VariableNode extends Node implements AssignTarget {
else if (pollute) target.add(_i -> i.index().toGet());
}
public static IntFunction<Instruction> toGet(CompileResult target, Location loc, String name, Supplier<Instruction> onGlobal) {
public static IntFunction<Instruction> toGet(CompileResult target, Location loc, String name, boolean forceGet) {
var i = target.scope.get(name, false);
if (i == null) return _i -> {
if (target.scope.has(name, false)) return Instruction.throwSyntax(loc, String.format("Cannot access '%s' before initialization", name));
else return onGlobal.get();
else return Instruction.globGet(name, forceGet);
};
else return _i -> i.index().toGet();
}
public static IntFunction<Instruction> toGet(CompileResult target, Location loc, String name) {
return toGet(target, loc, name, () -> Instruction.globGet(name));
}
return toGet(target, loc, name, false);
}
public static IntFunction<Instruction> toSet(CompileResult target, Location loc, String name, boolean keep, boolean define) {

52
src/main/java/me/topchetoeu/jscript/compilation/values/operations/AssignNode.java
View File

@ -5,45 +5,26 @@ import me.topchetoeu.jscript.common.Operation;
import me.topchetoeu.jscript.common.parsing.Location;
import me.topchetoeu.jscript.compilation.CompileResult;
import me.topchetoeu.jscript.compilation.Node;
import me.topchetoeu.jscript.compilation.JavaScript.DeclarationType;
import me.topchetoeu.jscript.compilation.destructing.AssignTarget;
import me.topchetoeu.jscript.compilation.destructing.Destructor;
import me.topchetoeu.jscript.compilation.scope.Variable;
import me.topchetoeu.jscript.compilation.values.VariableNode;
import me.topchetoeu.jscript.compilation.patterns.AssignTarget;
import me.topchetoeu.jscript.runtime.exceptions.SyntaxException;
public class AssignNode extends Node implements Destructor {
public class AssignNode extends Node implements AssignTarget {
public final AssignTarget assignable;
public final Node value;
@Override public void destructDeclResolve(CompileResult target) {
if (!(assignable instanceof VariableNode var)) {
throw new SyntaxException(loc(), "Assign target in declaration destructor must be a variable");
}
@Override public void compile(CompileResult target, boolean pollute) {
if (assignable instanceof AssignNode other) throw new SyntaxException(other.loc(), "Assign deconstructor not allowed here");
target.scope.define(new Variable(var.name, false), var.loc());
assignable.beforeAssign(target);
value.compile(target, true);
assignable.afterAssign(target, pollute);
}
@Override public void destructArg(CompileResult target) {
if (!(assignable instanceof VariableNode var)) {
throw new SyntaxException(loc(), "Assign target in declaration destructor must be a variable");
}
@Override public void afterAssign(CompileResult target, boolean pollute) {
if (assignable instanceof AssignNode other) throw new SyntaxException(other.loc(), "Double assign deconstructor not allowed");
var v = target.scope.define(new Variable(var.name, false), var.loc());
afterAssign(target, null, false);
target.add(_i -> v.index().toSet(false));
}
@Override public void afterAssign(CompileResult target, DeclarationType decl, boolean pollute) {
if (decl != null && decl.strict) {
if (!(assignable instanceof VariableNode var)) {
throw new SyntaxException(loc(), "Assign target in declaration destructor must be a variable");
}
target.scope.define(new Variable(var.name, decl.strict), var.loc());
}
assignable.beforeAssign(target, decl);
target.add(Instruction.dup());
if (pollute) target.add(Instruction.dup(2, 0));
else target.add(Instruction.dup());
target.add(Instruction.pushUndefined());
target.add(Instruction.operation(Operation.EQUALS));
var start = target.temp();
@ -51,15 +32,10 @@ public class AssignNode extends Node implements Destructor {
value.compile(target, true);
target.set(start, Instruction.jmp(target.size() - start));
target.set(start, Instruction.jmpIfNot(target.size() - start));
assignable.afterAssign(target, decl, pollute);
}
@Override public void compile(CompileResult target, boolean pollute) {
assignable.beforeAssign(target, null);
value.compile(target, true);
assignable.afterAssign(target, null, pollute);
assignable.assign(target, false);
if (!pollute) target.add(Instruction.discard());
}
public AssignNode(Location loc, AssignTarget assignable, Node value) {

2
src/main/java/me/topchetoeu/jscript/compilation/values/operations/CallNode.java
View File

@ -38,7 +38,7 @@ public class CallNode extends Node {
shouldParen = true;
if (obj.getters.size() > 0 || obj.setters.size() > 0 || obj.map.size() > 0) res = "{}";
if (obj.members.size() > 0) res = "{}";
else res = "{(intermediate value)}";
}
else if (func instanceof StringNode) {

12
src/main/java/me/topchetoeu/jscript/compilation/values/operations/ChangeNode.java
View File

@ -9,24 +9,24 @@ import me.topchetoeu.jscript.common.parsing.Source;
import me.topchetoeu.jscript.compilation.CompileResult;
import me.topchetoeu.jscript.compilation.JavaScript;
import me.topchetoeu.jscript.compilation.Node;
import me.topchetoeu.jscript.compilation.destructing.ChangeTarget;
import me.topchetoeu.jscript.compilation.patterns.ChangeTarget;
import me.topchetoeu.jscript.compilation.values.constants.NumberNode;
public class ChangeNode extends Node {
public final ChangeTarget assignable;
public final ChangeTarget changable;
public final Node value;
public final Operation op;
@Override public void compile(CompileResult target, boolean pollute) {
assignable.beforeChange(target);
changable.beforeChange(target);
value.compile(target, true);
target.add(Instruction.operation(op));
assignable.afterChange(target, pollute);
changable.afterAssign(target, pollute);
}
public ChangeNode(Location loc, ChangeTarget assignable, Node value, Operation op) {
public ChangeNode(Location loc, ChangeTarget changable, Node value, Operation op) {
super(loc);
this.assignable = assignable;
this.changable = changable;
this.value = value;
this.op = op;
}

79
src/main/java/me/topchetoeu/jscript/compilation/values/operations/IndexNode.java
View File

@ -6,39 +6,21 @@ import me.topchetoeu.jscript.common.parsing.Location;
import me.topchetoeu.jscript.common.parsing.ParseRes;
import me.topchetoeu.jscript.common.parsing.Parsing;
import me.topchetoeu.jscript.common.parsing.Source;
import me.topchetoeu.jscript.compilation.AssignableNode;
import me.topchetoeu.jscript.compilation.CompileResult;
import me.topchetoeu.jscript.compilation.JavaScript;
import me.topchetoeu.jscript.compilation.Node;
import me.topchetoeu.jscript.compilation.JavaScript.DeclarationType;
import me.topchetoeu.jscript.compilation.destructing.AssignTarget;
import me.topchetoeu.jscript.compilation.destructing.ChangeTarget;
import me.topchetoeu.jscript.compilation.patterns.ChangeTarget;
import me.topchetoeu.jscript.compilation.values.constants.NumberNode;
import me.topchetoeu.jscript.compilation.values.constants.StringNode;
import me.topchetoeu.jscript.runtime.exceptions.SyntaxException;
public class IndexNode extends Node implements ChangeTarget {
public final Node object;
public final Node index;
@Override public void destructDeclResolve(CompileResult target) {
throw new SyntaxException(loc(), "Unexpected index in destructor");
}
@Override public void destructArg(CompileResult target) {
throw new SyntaxException(loc(), "Unexpected index in destructor");
}
@Override public void beforeAssign(CompileResult target, DeclarationType decl) {
if (decl != null) throw new SyntaxException(loc(), "Unexpected index in destructor");
@Override public void beforeAssign(CompileResult target) {
object.compile(target, true);
if (index instanceof NumberNode num && (int)num.value == num.value) return;
if (index instanceof StringNode) return;
index.compile(target, true);
target.add(Instruction.dup(1, 1));
target.add(Instruction.dup(1, 1));
target.add(Instruction.loadMember());
indexStorePushKey(target, index);
}
@Override public void beforeChange(CompileResult target) {
object.compile(target, true);
@ -59,26 +41,16 @@ public class IndexNode extends Node implements ChangeTarget {
target.add(Instruction.loadMember());
}
}
@Override public void afterAssign(CompileResult target, boolean op, boolean pollute) {
if (index instanceof NumberNode num && (int)num.value == num.value) {
target.add(Instruction.storeMember((int)num.value, pollute));
}
else if (index instanceof StringNode str) {
target.add(Instruction.storeMember(str.value, pollute));
}
else {
target.add(Instruction.storeMember(pollute));
}
}
@Override public void afterAssign(CompileResult target, DeclarationType decl) {
throw new SyntaxException(loc(), "Illegal index in declaration destruction context");
}
@Override public void destructAssign(CompileResult target, boolean pollute) {
@Override public void assign(CompileResult target, boolean pollute) {
object.compile(target, true);
target.add(Instruction.dup(1, 1));
compileAfterAssign(target, false, false);
if (!pollute) target.add(Instruction.discard());
indexStorePushKey(target, index);
indexStore(target, index, pollute);
}
@Override public void afterAssign(CompileResult target, boolean pollute) {
indexStore(target, index, pollute);
}
// @Override public Node toAssign(Node val, Operation operation) {
@ -147,4 +119,35 @@ public class IndexNode extends Node implements ChangeTarget {
return ParseRes.res(new IndexNode(loc, prev, new StringNode(loc, literal.result)), n);
}
public static void indexStorePushKey(CompileResult target, Node index) {
if (index instanceof NumberNode num && (int)num.value == num.value) return;
if (index instanceof StringNode) return;
index.compile(target, true);
}
public static void indexStore(CompileResult target, Node index, boolean pollute) {
if (index instanceof NumberNode num && (int)num.value == num.value) {
target.add(Instruction.storeMember((int)num.value, pollute));
}
else if (index instanceof StringNode str) {
target.add(Instruction.storeMember(str.value, pollute));
}
else {
target.add(Instruction.storeMember(pollute));
}
}
public static void indexLoad(CompileResult target, Node index, boolean pollute) {
if (index instanceof NumberNode num && (int)num.value == num.value) {
target.add(Instruction.loadMember((int)num.value));
}
else if (index instanceof StringNode str) {
target.add(Instruction.loadMember(str.value));
}
else {
index.compile(target, true);
target.add(Instruction.loadMember());
}
if (!pollute) target.add(Instruction.discard());
}
}

24
src/main/java/me/topchetoeu/jscript/compilation/values/operations/OperationNode.java
View File

@ -11,10 +11,11 @@ import me.topchetoeu.jscript.common.parsing.Location;
import me.topchetoeu.jscript.common.parsing.ParseRes;
import me.topchetoeu.jscript.common.parsing.Parsing;
import me.topchetoeu.jscript.common.parsing.Source;
import me.topchetoeu.jscript.compilation.AssignableNode;
import me.topchetoeu.jscript.compilation.CompileResult;
import me.topchetoeu.jscript.compilation.JavaScript;
import me.topchetoeu.jscript.compilation.Node;
import me.topchetoeu.jscript.compilation.patterns.AssignTargetLike;
import me.topchetoeu.jscript.compilation.patterns.ChangeTarget;
public class OperationNode extends Node {
private static interface OperatorFactory {
@ -54,13 +55,22 @@ public class OperationNode extends Node {
@Override public ParseRes<Node> construct(Source src, int i, Node prev) {
var loc = src.loc(i);
if (!(prev instanceof AssignTarget)) return ParseRes.error(loc, String.format("Expected an assignable expression before '%s'", token));
if (operation == null) {
if (!(prev instanceof AssignTargetLike target)) return ParseRes.error(loc, String.format("Expected an assignable expression before '%s'", token));
var other = JavaScript.parseExpression(src, i, precedence);
if (!other.isSuccess()) return other.chainError(src.loc(i + other.n), String.format("Expected a value after '%s'", token));
var other = JavaScript.parseExpression(src, i, precedence);
if (!other.isSuccess()) return other.chainError(src.loc(i + other.n), String.format("Expected a value after '%s'", token));
if (operation == null) return ParseRes.res(new AssignNode(loc, ((AssignTarget)prev), other.result), other.n);
else return ParseRes.res(new ChangeNode(loc, ((AssignTarget)prev), other.result, operation), other.n);
return ParseRes.res(new AssignNode(loc, target.toAssignTarget(), other.result), other.n);
}
else {
if (!(prev instanceof ChangeTarget target)) return ParseRes.error(loc, String.format("Expected a changeable expression before '%s'", token));
var other = JavaScript.parseExpression(src, i, precedence);
if (!other.isSuccess()) return other.chainError(src.loc(i + other.n), String.format("Expected a value after '%s'", token));
return ParseRes.res(new ChangeNode(loc, target, other.result, operation), other.n);
}
}
public AssignmentOperatorFactory(String token, int precedence, Operation operation) {
@ -209,7 +219,7 @@ public class OperationNode extends Node {
var factory = factories.get(token);
if (!src.is(i + n, token)) continue;
if (factory.precedence() < precedence) ParseRes.failed();
if (factory.precedence() < precedence) return ParseRes.failed();
n += token.length();
n += Parsing.skipEmpty(src, i + n);

12
src/main/java/me/topchetoeu/jscript/compilation/values/operations/PostfixNode.java
View File

@ -6,9 +6,9 @@ import me.topchetoeu.jscript.common.parsing.Location;
import me.topchetoeu.jscript.common.parsing.ParseRes;
import me.topchetoeu.jscript.common.parsing.Parsing;
import me.topchetoeu.jscript.common.parsing.Source;
import me.topchetoeu.jscript.compilation.AssignableNode;
import me.topchetoeu.jscript.compilation.CompileResult;
import me.topchetoeu.jscript.compilation.Node;
import me.topchetoeu.jscript.compilation.patterns.ChangeTarget;
import me.topchetoeu.jscript.compilation.values.constants.NumberNode;
public class PostfixNode extends ChangeNode {
@ -21,7 +21,7 @@ public class PostfixNode extends ChangeNode {
}
}
public PostfixNode(Location loc, AssignTarget value, double addAmount) {
public PostfixNode(Location loc, ChangeTarget value, double addAmount) {
super(loc, value, new NumberNode(loc, -addAmount), Operation.SUBTRACT);
}
@ -32,10 +32,10 @@ public class PostfixNode extends ChangeNode {
var loc = src.loc(i + n);
if (!src.is(i + n, "++")) return ParseRes.failed();
if (!(prev instanceof AssignTarget)) return ParseRes.error(src.loc(i + n), "Expected assignable value before suffix operator.");
if (!(prev instanceof ChangeTarget)) return ParseRes.error(src.loc(i + n), "Expected assignable value before suffix operator.");
n += 2;
return ParseRes.res(new PostfixNode(loc, (AssignTarget)prev, 1), n);
return ParseRes.res(new PostfixNode(loc, (ChangeTarget)prev, 1), n);
}
public static ParseRes<ChangeNode> parsePostfixDecrease(Source src, int i, Node prev, int precedence) {
if (precedence > 15) return ParseRes.failed();
@ -44,9 +44,9 @@ public class PostfixNode extends ChangeNode {
var loc = src.loc(i + n);
if (!src.is(i + n, "--")) return ParseRes.failed();
if (!(prev instanceof AssignTarget)) return ParseRes.error(src.loc(i + n), "Expected assignable value before suffix operator.");
if (!(prev instanceof ChangeTarget)) return ParseRes.error(src.loc(i + n), "Expected assignable value before suffix operator.");
n += 2;
return ParseRes.res(new PostfixNode(loc, (AssignTarget)prev, -1), n);
return ParseRes.res(new PostfixNode(loc, (ChangeTarget)prev, -1), n);
}
}

8
src/main/java/me/topchetoeu/jscript/compilation/values/operations/TypeofNode.java
View File

@ -16,15 +16,15 @@ public class TypeofNode extends Node {
@Override public void compile(CompileResult target, boolean pollute) {
if (value instanceof VariableNode varNode) {
target.add(VariableNode.toGet(target, varNode.loc(), varNode.name, () -> Instruction.typeof(varNode.name)));
if (!pollute) target.add(Instruction.discard());
target.add(VariableNode.toGet(target, varNode.loc(), varNode.name, true));
if (pollute) target.add(Instruction.typeof());
else target.add(Instruction.discard());
return;
}
value.compile(target, pollute);
target.add(Instruction.typeof());
if (!pollute) target.add(Instruction.discard());
if (pollute) target.add(Instruction.typeof());
}
public TypeofNode(Location loc, Node value) {

33
src/main/resources/lib/index.js
View File

@ -233,6 +233,37 @@ const Object = function(value) {
defineField(Object, "prototype", false, false, false, setPrototype({}, null));
defineField(Object, "defineProperty", true, false, true, (obj, key, desc) => {
if (typeof obj !== "object" || obj === null) {
print(obj);
print(typeof obj);
throw new TypeError("Object.defineProperty called on non-object");
}
if (typeof desc !== "object" || desc === null) throw new TypeError("Property description must be an object: " + desc);
if ("get" in desc || "set" in desc) {
let get = desc.get, set = desc.set;
print(typeof get);
if (get !== undefined && typeof get !== "function") throw new TypeError("Getter must be a function: " + get);
if (set !== undefined && typeof set !== "function") throw new TypeError("Setter must be a function: " + set);
if ("value" in desc || "writable" in desc) {
throw new TypeError("Invalid property descriptor. Cannot both specify accessors and a value or writable attribute");
}
if (!defineProperty(obj, key, desc.enumerable, desc.configurable, get, set)) {
throw new TypeError("Cannot redefine property: " + key);
}
}
else if (!defineField(obj, key, desc.writable, desc.enumerable, desc.configurable, desc.value)) {
throw new TypeError("Cannot redefine property: " + key);
}
return obj;
});
defineField(Object.prototype, "toString", true, false, true, function() {
if (this !== null && this !== undefined && (Symbol.toStringTag in this)) return "[object " + this[Symbol.toStringTag] + "]";
else if (typeof this === "number" || this instanceof Number) return "[object Number]";
@ -246,7 +277,7 @@ defineField(Object.prototype, "valueOf", true, false, true, function() {
return this;
});
target.Boolean = Boolean;
target.Object = Object;
const Function = function() {
const parts = ["return function annonymous("];