1 package org.simantics.scl.compiler.elaboration.expressions;
3 import org.simantics.scl.compiler.elaboration.contexts.ReplaceContext;
4 import org.simantics.scl.compiler.elaboration.contexts.SimplificationContext;
5 import org.simantics.scl.compiler.elaboration.contexts.TranslationContext;
6 import org.simantics.scl.compiler.elaboration.contexts.TypingContext;
7 import org.simantics.scl.compiler.errors.Locations;
8 import org.simantics.scl.compiler.internal.parsing.Symbol;
9 import org.simantics.scl.compiler.types.Type;
11 import gnu.trove.map.hash.TObjectIntHashMap;
12 import gnu.trove.set.hash.TIntHashSet;
14 public class Case extends Symbol {
15 public Expression[] patterns;
16 public Expression value;
20 public Case(Expression[] patterns, Expression value) {
21 this.patterns = patterns;
25 public Case(Expression pattern, Expression value) {
26 this(new Expression[] {pattern}, value);
29 public void setLhs(long lhs) {
33 public long getLhs() {
37 public void collectVars(TObjectIntHashMap<Variable> allVars,
39 value.collectVars(allVars, vars);
42 public void resolve(TranslationContext context) {
44 for(int i=0;i<patterns.length;++i)
45 patterns[i] = patterns[i].resolveAsPattern(context);
46 value = value.resolve(context);
50 public void simplify(SimplificationContext context) {
51 for(int i=0;i<patterns.length;++i)
52 patterns[i] = patterns[i].simplify(context);
53 value = value.simplify(context);
56 public void setLocationDeep(long loc) {
57 if(location == Locations.NO_LOCATION) {
59 for(Expression pattern : patterns)
60 pattern.setLocationDeep(loc);
61 value.setLocationDeep(loc);
65 public Case replace(ReplaceContext context) {
66 Expression[] newPatterns = new Expression[patterns.length];
67 for(int i=0;i<patterns.length;++i)
68 newPatterns[i] = patterns[i].replaceInPattern(context);
69 Expression newValue = value.replace(context);
70 Case result = new Case(newPatterns, newValue);
75 public Expression[] getPatterns() {
79 public void checkType(TypingContext context, Type[] parameterTypes,
81 if(patterns.length != parameterTypes.length) {
82 context.getErrorLog().log(location, "This case has different arity ("+patterns.length+
83 ") than than the first case (+"+parameterTypes.length+"+).");
86 for(int i=0;i<patterns.length;++i)
87 patterns[i] = patterns[i].checkTypeAsPattern(context, parameterTypes[i]);
88 value = value.checkType(context, requiredType);
91 public void checkIgnoredType(TypingContext context, Type[] parameterTypes) {
92 if(patterns.length != parameterTypes.length) {
93 context.getErrorLog().log(location, "This case has different arity ("+patterns.length+
94 ") than than the first case (+"+parameterTypes.length+"+).");
97 for(int i=0;i<patterns.length;++i)
98 patterns[i] = patterns[i].checkTypeAsPattern(context, parameterTypes[i]);
99 value = value.checkIgnoredType(context);