X-Git-Url: https://gerrit.simantics.org/r/gitweb?a=blobdiff_plain;f=bundles%2Forg.simantics.scl.compiler%2Fsrc%2Forg%2Fsimantics%2Fscl%2Fcompiler%2Felaboration%2Fexpressions%2Fblock%2FLetStatement.java;fp=bundles%2Forg.simantics.scl.compiler%2Fsrc%2Forg%2Fsimantics%2Fscl%2Fcompiler%2Felaboration%2Fexpressions%2Fblock%2FLetStatement.java;h=537ec303b89eec93ce6c71defb145e6a23868d9b;hb=969bd23cab98a79ca9101af33334000879fb60c5;hp=0000000000000000000000000000000000000000;hpb=866dba5cd5a3929bbeae85991796acb212338a08;p=simantics%2Fplatform.git

diff --git a/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/elaboration/expressions/block/LetStatement.java b/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/elaboration/expressions/block/LetStatement.java
new file mode 100755
index 000000000..537ec303b
--- /dev/null
+++ b/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/elaboration/expressions/block/LetStatement.java
@@ -0,0 +1,59 @@
+package org.simantics.scl.compiler.elaboration.expressions.block;
+
+import org.simantics.scl.compiler.elaboration.contexts.EnvironmentalContext;
+import org.simantics.scl.compiler.elaboration.contexts.ReplaceContext;
+import org.simantics.scl.compiler.elaboration.contexts.TranslationContext;
+import org.simantics.scl.compiler.elaboration.expressions.Case;
+import org.simantics.scl.compiler.elaboration.expressions.EMatch;
+import org.simantics.scl.compiler.elaboration.expressions.ESimpleLet;
+import org.simantics.scl.compiler.elaboration.expressions.EVariable;
+import org.simantics.scl.compiler.elaboration.expressions.Expression;
+import org.simantics.scl.compiler.errors.Locations;
+
+public class LetStatement extends Statement {
+    public Expression pattern;
+    public Expression value;
+    
+    public LetStatement(Expression pattern, Expression value) {
+        this.pattern = pattern;
+        this.value = value;
+    }
+
+    @Override
+    public Expression toExpression(EnvironmentalContext context, boolean monadic, Expression in) {
+        if(pattern instanceof EVariable)
+            return new ESimpleLet(((EVariable)pattern).getVariable(), value, in);
+        else
+            //return new EPreLet(Arrays.asList(this), in);
+            return new EMatch(location, new Expression[] {value}, new Case[] {new Case(pattern, in)});
+    }
+    
+    @Override
+    public void setLocationDeep(long loc) {
+        if(location == Locations.NO_LOCATION) {
+            location = loc;
+            pattern.setLocationDeep(loc);
+            value.setLocationDeep(loc);
+        }
+    }
+    
+    @Override
+    public void resolvePattern(TranslationContext context) {
+        pattern = pattern.resolveAsPattern(context);
+    }
+    
+    @Override
+    public boolean mayBeRecursive() {
+        return pattern.isFunctionDefinitionLhs();
+    }
+    
+    @Override
+    public Statement replace(ReplaceContext context) {
+        return new LetStatement(pattern.replaceInPattern(context), value.replace(context));
+    }
+    
+    @Override
+    public void accept(StatementVisitor visitor) {
+        visitor.visit(this);
+    }
+}
\ No newline at end of file