--- /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 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.elaboration.query.QExists;\r
+import org.simantics.scl.compiler.elaboration.query.Query;\r
+import org.simantics.scl.compiler.elaboration.query.compilation.QueryCompilationContext;\r
+import org.simantics.scl.compiler.elaboration.query.compilation.QueryCompilationMode;\r
+import org.simantics.scl.compiler.elaboration.query.compilation.UnsolvableQueryException;\r
+import org.simantics.scl.compiler.errors.Locations;\r
+import org.simantics.scl.compiler.internal.elaboration.utils.ExpressionDecorator;\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
+\r
+public class EWhen extends SimplifiableExpression {\r
+\r
+ public Query query;\r
+ public Expression action;\r
+ Variable[] variables;\r
+ \r
+ public EWhen(Query query, Expression action) {\r
+ this.query = query;\r
+ this.action = action;\r
+ }\r
+ \r
+ public EWhen(long location, Query query, Expression action, Variable[] variables) {\r
+ if(variables == null)\r
+ throw new NullPointerException();\r
+ if(location == Locations.NO_LOCATION)\r
+ new Exception().printStackTrace();\r
+ this.location = location;\r
+ this.query = query;\r
+ this.action = action;\r
+ this.variables = variables;\r
+ }\r
+\r
+ @Override\r
+ public void collectRefs(TObjectIntHashMap<Object> allRefs,\r
+ TIntHashSet refs) {\r
+ query.collectRefs(allRefs, refs);\r
+ action.collectRefs(allRefs, refs);\r
+ }\r
+\r
+ @Override\r
+ public void collectVars(TObjectIntHashMap<Variable> allVars,\r
+ TIntHashSet vars) {\r
+ query.collectVars(allVars, vars);\r
+ action.collectVars(allVars, vars);\r
+ }\r
+ \r
+ @Override\r
+ public void collectEffects(THashSet<Type> effects) {\r
+ throw new InternalCompilerError(location, getClass().getSimpleName() + " does not support collectEffects.");\r
+ }\r
+\r
+ @Override\r
+ protected void updateType() throws MatchException {\r
+ setType(Types.UNIT);\r
+ }\r
+ \r
+ @Override\r
+ public Expression checkBasicType(TypingContext context, Type requiredType) {\r
+ try {\r
+ Types.unify(requiredType, Types.UNIT);\r
+ } catch (UnificationException e) {\r
+ context.typeError(location, requiredType, Types.UNIT);\r
+ return this;\r
+ }\r
+ for(Variable variable : variables)\r
+ variable.setType(Types.metaVar(Kinds.STAR));\r
+ query.checkType(context);\r
+ action.checkType(context, Types.UNIT);\r
+ \r
+ // Compile query\r
+ return compile(context);\r
+ }\r
+ \r
+ public Expression compile(TypingContext context) {\r
+ try {\r
+ QueryCompilationContext queryCompilationContext =\r
+ new QueryCompilationContext(context, QueryCompilationMode.ITERATE, null, action);\r
+ new QExists(variables, query).generate(queryCompilationContext);\r
+ return queryCompilationContext.getContinuation();\r
+ } catch(UnsolvableQueryException e) {\r
+ context.getErrorLog().log(getLocation(), "Failed to compile the query.\n" + e.getMessage());\r
+ return new EError(getLocation());\r
+ }\r
+ }\r
+\r
+ @Override\r
+ public void collectFreeVariables(THashSet<Variable> vars) {\r
+ action.collectFreeVariables(vars);\r
+ query.collectFreeVariables(vars);\r
+ for(Variable var : variables)\r
+ vars.remove(var);\r
+ }\r
+\r
+ @Override\r
+ public Expression resolve(TranslationContext context) {\r
+ context.pushExistentialFrame();\r
+ query = query.resolve(context);\r
+ action = action.resolve(context);\r
+ variables = context.popExistentialFrame();\r
+ return this;\r
+ }\r
+\r
+ @Override\r
+ public Expression decorate(ExpressionDecorator decorator) { \r
+ return decorator.decorate(this);\r
+ }\r
+ \r
+ @Override\r
+ public Expression replace(ReplaceContext context) {\r
+ Variable[] newVariables = new Variable[variables.length];\r
+ for(int i=0;i<variables.length;++i) {\r
+ Variable variable = variables[i];\r
+ Variable newVariable = new Variable(variable.name, variable.getType());\r
+ newVariables[i] = newVariable;\r
+ context.varMap.put(variable, new EVariable(newVariable));\r
+ }\r
+ EWhen result = new EWhen(location, query.replace(context), action.replace(context), newVariables);\r
+ for(int i=0;i<variables.length;++i)\r
+ context.varMap.remove(variables[i]);\r
+ return result;\r
+ }\r
+\r
+ @Override\r
+ public void setLocationDeep(long loc) {\r
+ if(location == Locations.NO_LOCATION) {\r
+ location = loc;\r
+ query.setLocationDeep(loc);\r
+ action.setLocationDeep(loc);\r
+ }\r
+ }\r
+ \r
+ @Override\r
+ public void accept(ExpressionVisitor visitor) {\r
+ visitor.visit(this);\r
+ }\r
+ \r
+ public Query getQuery() {\r
+ return query;\r
+ }\r
+ \r
+ public Expression getAction() {\r
+ return action;\r
+ }\r
+\r
+ @Override\r
+ public void forVariables(VariableProcedure procedure) {\r
+ query.forVariables(procedure);\r
+ action.forVariables(procedure);\r
+ }\r
+ \r
+ @Override\r
+ public Expression simplify(SimplificationContext context) {\r
+ throw new UnsupportedOperationException();\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