--- /dev/null
+package org.simantics.scl.compiler.elaboration.expressions;\r
+\r
+import gnu.trove.map.hash.TObjectIntHashMap;\r
+import gnu.trove.set.hash.THashSet;\r
+import gnu.trove.set.hash.TIntHashSet;\r
+\r
+import java.util.ArrayList;\r
+\r
+import org.simantics.scl.compiler.common.exceptions.InternalCompilerError;\r
+import org.simantics.scl.compiler.elaboration.contexts.ReplaceContext;\r
+import org.simantics.scl.compiler.elaboration.contexts.SimplificationContext;\r
+import org.simantics.scl.compiler.elaboration.contexts.TranslationContext;\r
+import org.simantics.scl.compiler.elaboration.contexts.TypingContext;\r
+import org.simantics.scl.compiler.environment.Environment;\r
+import org.simantics.scl.compiler.errors.Locations;\r
+import org.simantics.scl.compiler.internal.codegen.references.IVal;\r
+import org.simantics.scl.compiler.internal.codegen.writer.CodeWriter;\r
+import org.simantics.scl.compiler.internal.elaboration.utils.ExpressionDecorator;\r
+import org.simantics.scl.compiler.internal.interpreted.IExpression;\r
+import org.simantics.scl.compiler.internal.interpreted.ILambda;\r
+import org.simantics.scl.compiler.top.ExpressionInterpretationContext;\r
+import org.simantics.scl.compiler.top.SCLCompilerConfiguration;\r
+import org.simantics.scl.compiler.types.Type;\r
+import org.simantics.scl.compiler.types.Types;\r
+import org.simantics.scl.compiler.types.exceptions.MatchException;\r
+import org.simantics.scl.compiler.types.exceptions.UnificationException;\r
+import org.simantics.scl.compiler.types.kinds.Kinds;\r
+import org.simantics.scl.compiler.types.util.MultiFunction;\r
+\r
+public class ESimpleLambda extends Expression {\r
+ public Variable parameter;\r
+ public Expression value;\r
+ public Type effect = Types.NO_EFFECTS;\r
+ \r
+ public ESimpleLambda(Variable parameter, Expression value) {\r
+ this.parameter = parameter;\r
+ this.value = value;\r
+ }\r
+ \r
+ public ESimpleLambda(Type effect, Variable parameter, Expression value) {\r
+ this.parameter = parameter;\r
+ this.value = value;\r
+ this.effect = effect;\r
+ }\r
+\r
+ public ESimpleLambda(long loc, Variable parameter, Expression value) {\r
+ super(loc);\r
+ this.parameter = parameter;\r
+ this.value = value;\r
+ }\r
+ \r
+ public ESimpleLambda(long loc, Variable parameter, Type effect, Expression value) {\r
+ super(loc);\r
+ this.parameter = parameter;\r
+ this.value = value;\r
+ this.effect = effect;\r
+ }\r
+\r
+ public void collectRefs(TObjectIntHashMap<Object> allRefs, TIntHashSet refs) {\r
+ value.collectRefs(allRefs, refs);\r
+ }\r
+ \r
+ @Override\r
+ public void collectVars(TObjectIntHashMap<Variable> allVars,\r
+ TIntHashSet vars) {\r
+ value.collectVars(allVars, vars);\r
+ }\r
+\r
+ public Expression decomposeMatching() {\r
+ value = value.decomposeMatching();\r
+ return this;\r
+ }\r
+\r
+ @Override\r
+ protected void updateType() throws MatchException {\r
+ setType(Types.functionE(Types.canonical(parameter.type),\r
+ effect, value.getType()));\r
+ }\r
+ \r
+ @Override\r
+ public IVal toVal(Environment env, CodeWriter w) {\r
+ return lambdaToVal(env, w);\r
+ }\r
+\r
+ @Override\r
+ public void collectFreeVariables(THashSet<Variable> vars) {\r
+ value.collectFreeVariables(vars);\r
+ vars.remove(parameter);\r
+ }\r
+\r
+ @Override\r
+ public Expression simplify(SimplificationContext context) {\r
+ value = value.simplify(context);\r
+ return this;\r
+ }\r
+\r
+ @Override\r
+ public Expression resolve(TranslationContext context) {\r
+ value = value.resolve(context);\r
+ return this;\r
+ }\r
+\r
+ @Override\r
+ public Expression replace(ReplaceContext context) {\r
+ Variable newParameter = parameter.copy();\r
+ context.varMap.put(parameter, new EVariable(newParameter));\r
+ ESimpleLambda result = new ESimpleLambda(getLocation(),\r
+ newParameter, \r
+ effect.replace(context.tvarMap),\r
+ value.replace(context));\r
+ // not absolutely needed, but maybe good for performance\r
+ context.varMap.remove(parameter); \r
+ return result;\r
+ }\r
+ \r
+ public Type getLocalEffect() {\r
+ if(SCLCompilerConfiguration.DEBUG)\r
+ if(effect == null)\r
+ throw new InternalCompilerError();\r
+ return effect;\r
+ }\r
+ \r
+ public void setEffect(Type effect) {\r
+ if(effect == null)\r
+ throw new InternalCompilerError();\r
+ this.effect = effect;\r
+ }\r
+ \r
+ @Override\r
+ public IExpression toIExpression(ExpressionInterpretationContext context) {\r
+ // Find parameters of the whole function definition\r
+ ArrayList<Variable> parameters = new ArrayList<Variable>(2);\r
+ parameters.add(parameter);\r
+ Expression cur = value;\r
+ while(true) {\r
+ if(cur instanceof ESimpleLambda) {\r
+ ESimpleLambda lambda = (ESimpleLambda)cur;\r
+ parameters.add(lambda.parameter);\r
+ cur = lambda.value;\r
+ }\r
+ else if(cur instanceof ELambdaType) {\r
+ cur = ((ELambdaType)cur).value;\r
+ }\r
+ else\r
+ break;\r
+ \r
+ }\r
+ \r
+ // Free variables;\r
+ ExpressionInterpretationContext innerContext = context.createNewContext();\r
+ THashSet<Variable> freeVariables = cur.getFreeVariables();\r
+ for(Variable parameter : parameters)\r
+ freeVariables.remove(parameter);\r
+ int i=0;\r
+ int[] inheritedVariableIds = new int[freeVariables.size()];\r
+ for(Variable var : freeVariables) {\r
+ innerContext.push(var);\r
+ inheritedVariableIds[i++] = context.getVariableId(var);\r
+ }\r
+ \r
+ // Parameters\r
+ for(Variable parameter : parameters)\r
+ innerContext.push(parameter);\r
+ \r
+ // Construct lambda\r
+ IExpression body = cur.toIExpression(innerContext); \r
+ return new ILambda(inheritedVariableIds,\r
+ parameters.size(),\r
+ innerContext.getMaxVariableId(),\r
+ body);\r
+ }\r
+ \r
+ public Expression checkBasicType(TypingContext context, Type requiredType) {\r
+ MultiFunction mfun;\r
+ try {\r
+ mfun = Types.unifyFunction(requiredType, 1);\r
+ } catch (UnificationException e) {\r
+ context.getErrorLog().log(location, "Required type is <" + requiredType + "> which is incompatible with lambda.");\r
+ setType(Types.metaVar(Kinds.STAR));\r
+ return this;\r
+ }\r
+ \r
+ effect = mfun.effect;\r
+ context.pushEffectUpperBound(location, mfun.effect);\r
+ parameter.setType(mfun.parameterTypes[0]);\r
+ value = value.checkType(context, mfun.returnType);\r
+ context.popEffectUpperBound();\r
+ return this;\r
+ }\r
+ \r
+ @Override\r
+ public Expression inferType(TypingContext context) {\r
+ effect = Types.metaVar(Kinds.EFFECT);\r
+ context.pushEffectUpperBound(location, effect);\r
+ if(parameter.type == null)\r
+ parameter.setType(Types.metaVar(Kinds.STAR));\r
+ value = value.checkType(context, Types.metaVar(Kinds.STAR));\r
+ context.popEffectUpperBound();\r
+ return this;\r
+ }\r
+\r
+ @Override\r
+ public Expression decorate(ExpressionDecorator decorator) {\r
+ if(decorator.decorateSubstructure(this))\r
+ value = value.decorate(decorator);\r
+ return decorator.decorate(this);\r
+ }\r
+\r
+ @Override\r
+ public boolean isEffectful() {\r
+ return false;\r
+ }\r
+ \r
+ @Override\r
+ public void collectEffects(THashSet<Type> effects) {\r
+ }\r
+ \r
+ @Override\r
+ public void setLocationDeep(long loc) {\r
+ if(location == Locations.NO_LOCATION) {\r
+ location = loc;\r
+ value.setLocationDeep(loc);\r
+ }\r
+ }\r
+ \r
+ @Override\r
+ public void accept(ExpressionVisitor visitor) {\r
+ visitor.visit(this);\r
+ }\r
+ \r
+ public Expression getValue() {\r
+ return value;\r
+ }\r
+ \r
+ public Variable getParameter() {\r
+ return parameter;\r
+ }\r
+\r
+ @Override\r
+ public void forVariables(VariableProcedure procedure) {\r
+ value.forVariables(procedure);\r
+ }\r
+ \r
+ @Override\r
+ public Expression accept(ExpressionTransformer transformer) {\r
+ return transformer.transform(this);\r
+ }\r
+\r
+}\r
Code Review / simantics / platform.git / blobdiff