--- /dev/null
+package org.simantics.scl.compiler.elaboration.expressions;\r
+\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.ILet;\r
+import org.simantics.scl.compiler.internal.interpreted.ISeq;\r
+import org.simantics.scl.compiler.top.ExpressionInterpretationContext;\r
+import org.simantics.scl.compiler.types.Type;\r
+import org.simantics.scl.compiler.types.exceptions.MatchException;\r
+\r
+import gnu.trove.map.hash.TObjectIntHashMap;\r
+import gnu.trove.set.hash.THashSet;\r
+import gnu.trove.set.hash.TIntHashSet;\r
+\r
+public class ESimpleLet extends Expression {\r
+ Variable variable; // may be null\r
+ Expression value;\r
+ Expression in;\r
+ \r
+ public ESimpleLet(Variable variable, Expression value, Expression in) {\r
+ if(value == null)\r
+ throw new NullPointerException();\r
+ if(in == null)\r
+ throw new NullPointerException();\r
+ this.variable = variable;\r
+ this.value = value;\r
+ this.in = in;\r
+ }\r
+\r
+ public ESimpleLet(long loc, Variable variable, Expression value, Expression in) {\r
+ super(loc);\r
+ if(value == null)\r
+ throw new NullPointerException();\r
+ if(in == null)\r
+ throw new NullPointerException();\r
+ this.variable = variable;\r
+ this.value = value;\r
+ this.in = in;\r
+ }\r
+\r
+ public void collectRefs(TObjectIntHashMap<Object> allRefs, TIntHashSet refs) {\r
+ value.collectRefs(allRefs, refs);\r
+ in.collectRefs(allRefs, refs);\r
+ }\r
+ \r
+ @Override\r
+ public void collectVars(TObjectIntHashMap<Variable> allVars,\r
+ TIntHashSet vars) {\r
+ value.collectVars(allVars, vars);\r
+ in.collectVars(allVars, vars);\r
+ }\r
+\r
+ @Override\r
+ protected void updateType() throws MatchException {\r
+ setType(in.getType());\r
+ }\r
+ \r
+ @Override\r
+ public IVal toVal(Environment env, CodeWriter w) {\r
+ IVal valueVal = value.toVal(env, w);\r
+ if(variable != null)\r
+ variable.setVal(valueVal);\r
+ return in.toVal(env, w);\r
+ }\r
+\r
+ @Override\r
+ public void collectFreeVariables(THashSet<Variable> vars) {\r
+ value.collectFreeVariables(vars);\r
+ in.collectFreeVariables(vars);\r
+ vars.remove(variable);\r
+ }\r
+\r
+ @Override\r
+ public Expression simplify(SimplificationContext context) {\r
+ value = value.simplify(context);\r
+ if(value instanceof EConstant || value instanceof ELiteral) {\r
+ context.addInlinedVariable(variable, value);\r
+ return in.simplify(context);\r
+ }\r
+ in = in.simplify(context);\r
+ return this;\r
+ }\r
+\r
+ @Override\r
+ public Expression resolve(TranslationContext context) {\r
+ value = value.resolve(context);\r
+ in = in.resolve(context);\r
+ return this;\r
+ }\r
+\r
+ @Override\r
+ public Expression replace(ReplaceContext context) {\r
+ if(variable == null)\r
+ return new ESimpleLet(location,\r
+ null, \r
+ value.replace(context), \r
+ in.replace(context));\r
+ else {\r
+ Variable newVariable = variable.copy();\r
+ context.varMap.put(variable, new EVariable(newVariable));\r
+ ESimpleLet result = new ESimpleLet(location, newVariable, \r
+ value.replace(context), \r
+ in.replace(context));\r
+ context.varMap.remove(variable);\r
+ return result;\r
+ }\r
+ }\r
+ \r
+ @Override\r
+ public void setLocationDeep(long loc) {\r
+ if(location == Locations.NO_LOCATION) {\r
+ location = loc;\r
+ value.setLocationDeep(loc);\r
+ in.setLocationDeep(loc);\r
+ }\r
+ }\r
+\r
+ @Override\r
+ public IExpression toIExpression(ExpressionInterpretationContext context) {\r
+ if(variable == null) {\r
+ IExpression valueI = value.toIExpression(context);\r
+ IExpression inI = in.toIExpression(context);\r
+ return new ISeq(valueI, inI);\r
+ }\r
+ else {\r
+ IExpression valueI = value.toIExpression(context);\r
+ int variableId = context.push(variable);\r
+ IExpression inI = in.toIExpression(context);\r
+ context.pop(variable);\r
+ return new ILet(variableId, valueI, inI);\r
+ }\r
+ }\r
+\r
+ private void checkBinding(TypingContext context) {\r
+ if(variable == null)\r
+ value = value.inferType(context);\r
+ else if(variable.getType() == null) {\r
+ value = value.inferType(context);\r
+ variable.setType(value.getType());\r
+ }\r
+ else\r
+ value = value.checkType(context, variable.type);\r
+ /*else {\r
+ if(variable.getType() == null)\r
+ variable.setType(Types.metaVar(Kinds.STAR));\r
+ value = value.checkType(context, variable.type);\r
+ }*/\r
+ }\r
+ \r
+ @Override\r
+ public Expression inferType(TypingContext context) {\r
+ checkBinding(context);\r
+ in = in.inferType(context);\r
+ return this;\r
+ }\r
+ \r
+ @Override\r
+ public Expression checkBasicType(TypingContext context, Type requiredType) {\r
+ checkBinding(context);\r
+ in = in.checkType(context, requiredType);\r
+ return this;\r
+ }\r
+\r
+ @Override\r
+ public Expression decorate(ExpressionDecorator decorator) {\r
+ value = value.decorate(decorator);\r
+ in = in.decorate(decorator);\r
+ return decorator.decorate(this);\r
+ }\r
+\r
+ @Override\r
+ public void collectEffects(THashSet<Type> effects) {\r
+ value.collectEffects(effects);\r
+ in.collectEffects(effects);\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 getVariable() {\r
+ return variable;\r
+ }\r
+ \r
+ public Expression getIn() {\r
+ return in;\r
+ }\r
+\r
+ @Override\r
+ public void forVariables(VariableProcedure procedure) {\r
+ value.forVariables(procedure);\r
+ in.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