implement scoping 🎉

.idea/.gitignore

@@ -0,0 +1,8 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml

.idea/IBAFlang.iml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$" />
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

.idea/misc.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" project-jdk-name="1.8" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>

.idea/modules.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/IBAFlang.iml" filepath="$PROJECT_DIR$/.idea/IBAFlang.iml" />
+    </modules>
+  </component>
+</project>

.idea/vcs.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="" vcs="Git" />
+  </component>
+</project>

IBAF-Editor/syntax/cbs-gen/IBAF-Start.sdf3

@@ -1,8 +1,8 @@
 module IBAF-Start
             
 imports 
-  IBAF-Expressions
   IBAF-Statements
+  IBAF-Expressions
   Funcons
 
 // Language "IBAFlang"
@@ -18,18 +18,8 @@ lexical syntax // Language
 syntax // Language
   
 context-free syntax // Language
-  L-start.L-start--L-pgm =
+  L-start.L-start--L-statement-S =
-    L-pgm
+    L-statement*
-  
-  L-pgm.L-pgm--R-int-L-idlist-SEMI-L-stmt =
-    "int" L-idlist ";" L-stmt
-  
-  L-idlist.L-idlist--L-id-C-COMMA-L-idlist-D-Q =
-    L-id L-COMMA-L-idlist?
-  
-  L-COMMA-L-idlist.L-COMMA-L-idlist--COMMA-L-idlist =
-    "," L-idlist
-  
   
   L-keyword.LEX-keyword =
     LEX-keyword
@@ -37,10 +27,6 @@ context-free syntax // Language
 context-free syntax // Semantics
   FCT.T-start =
     "start" "[:" L-start ":]"
-  FCT.T-run =
-    "run" "[:" L-pgm ":]"
-  FCT-SEQ.T-declare-int-vars =
-    "declare-int-vars" "[:" L-idlist ":]"
   FCT-Quoted.LEX-keyword = LEX-keyword
   
 context-free syntax // Desugaring
@@ -50,14 +36,7 @@ variables // Meta-variables
   L-start? = "(:START" [1-9]? "?:)" {prefer}
   L-start* = "(:START" [1-9]? "*:)" {prefer}
   L-start+ = "(:START" [1-9]? "+:)" {prefer}
-  L-pgm = "(:Pgm" [1-9]? ":)" {prefer}
+  L-statement* = "..." [1-9]? {prefer}
-  L-pgm? = "(:Pgm" [1-9]? "?:)" {prefer}
-  L-pgm* = "(:Pgm" [1-9]? "*:)" {prefer}
-  L-pgm+ = "(:Pgm" [1-9]? "+:)" {prefer}
-  L-idlist = "(:IL" [1-9]? ":)" {prefer}
-  L-idlist? = "(:IL" [1-9]? "?:)" {prefer}
-  L-idlist* = "(:IL" [1-9]? "*:)" {prefer}
-  L-idlist+ = "(:IL" [1-9]? "+:)" {prefer}
   
 // SDF comments
   
@@ -73,9 +52,6 @@ variables // Meta-variables
   L-exp.L-exp--L-exp-AMPERSAND-AMPERSAND-L-exp =
     L-exp "&&" L-exp
    {assoc}
-  L-stmt.L-stmt--L-stmt-L-stmt =
-    L-stmt L-stmt
-        {right}
   
 sorts // ASTs
   T-start

IBAF-Editor/syntax/cbs-gen/IBAF-Statements.sdf3

@@ -8,15 +8,39 @@ imports
     
 lexical syntax // Language
   
+  // # Statements
+                   
+  
+  
+  // # Handling variable declarations
+                   
+  
+  
 syntax // Language
   
+  // # Statements
+                   
+  
+  
+  // # Handling variable declarations
+                   
+  
+  
 context-free syntax // Language
-  L-stmt.L-stmt--L-type-L-id-EQUALS-L-exp-SEMI =
+  
-    L-type L-id "=" L-exp ";"
+  // # Statements
-  L-stmt.L-stmt--R-print-LPAREN-L-exp-RPAREN-SEMI =
+                   
+  
+  L-statement.L-statement--LBRACE-L-statement-S-RBRACE =
+    "{" L-statement* "}"
+  L-statement.L-statement--R-print-LPAREN-L-exp-RPAREN-SEMI =
     "print" "(" L-exp ")" ";"
-  L-stmt.L-stmt--L-stmt-L-stmt =
+  L-statement.L-statement--L-type-L-id-SEMI =
-    L-stmt L-stmt
+    L-type L-id ";"
+  L-statement.L-statement--L-type-L-id-EQUALS-L-exp-SEMI =
+    L-type L-id "=" L-exp ";"
+  L-statement.L-statement--L-id-EQUALS-L-exp-SEMI =
+    L-id "=" L-exp ";"
   
   L-type.L-type--R-int =
     "int"
@@ -26,23 +50,62 @@ context-free syntax // Language
     L-id
   
   
+  // # Handling variable declarations
+                   
+  
+  
 context-free syntax // Semantics
+  
+  // # Statements
+                   
+  
   FCT.T-execute =
-    "execute" "[:" L-stmt ":]"
+    "execute" "[:" L-statement* ":]"
+  
+  // # Handling variable declarations
+                   
+  
+  FCT-SEQ.T-collect-declared-vars =
+    "collect-declared-vars" "[:" L-statement* ":]"
   
 context-free syntax // Desugaring
   
+  // # Statements
+                   
+  
+  
+  // # Handling variable declarations
+                   
+  
+  
 variables // Meta-variables
-  L-stmt = "(:Stmt" [1-9]? ":)" {prefer}
+  
-  L-stmt? = "(:Stmt" [1-9]? "?:)" {prefer}
+  // # Statements
-  L-stmt* = "(:Stmt" [1-9]? "*:)" {prefer}
+                   
-  L-stmt+ = "(:Stmt" [1-9]? "+:)" {prefer}
+  
+  L-statement = "(:Stmt" [1-9]? ":)" {prefer}
+  L-statement? = "(:Stmt" [1-9]? "?:)" {prefer}
+  L-statement* = "(:Stmt" [1-9]? "*:)" {prefer}
+  L-statement+ = "(:Stmt" [1-9]? "+:)" {prefer}
+  L-statement* = "..." [1-9]? {prefer}
   L-type = "(:Typ" [1-9]? ":)" {prefer}
   L-type? = "(:Typ" [1-9]? "?:)" {prefer}
   L-type* = "(:Typ" [1-9]? "*:)" {prefer}
   L-type+ = "(:Typ" [1-9]? "+:)" {prefer}
   
+  // # Handling variable declarations
+                   
+  
+  
 // SDF comments
   
+  // # Statements
+                   
+  
+  
+  // # Handling variable declarations
+                   
+  
+  
 sorts // ASTs
   T-start

IBAF-Editor/trans/cbs-gen/IBAF-Expressions.str

@@ -34,7 +34,7 @@ to-funcons:
              eval-exp[: (:Exp2:) :]) ]|
 to-funcons:
   |[ eval-exp[: (:Exp1:)-(:Exp2:) :] ]| ->
-  |[ int-sub (eval-exp[: (:Exp1:) :], 
+  |[ integer-subtract (eval-exp[: (:Exp1:) :], 
              eval-exp[: (:Exp2:) :]) ]|
 to-funcons:
   |[ eval-exp[: (:Exp1:)*(:Exp2:) :] ]| ->

IBAF-Editor/trans/cbs-gen/IBAF-Start.str

@@ -7,26 +7,13 @@ imports
   pp/IBAF-pp
 
 imports
-  cbs-gen/IBAF-Expressions
   cbs-gen/IBAF-Statements
+  cbs-gen/IBAF-Expressions
 
 // Language "IBAFlang"
 
 rules
 to-funcons:
-  |[ start[: (:Pgm:) :] ]| ->
+  |[ start[: (:Stmt*:) :] ]| ->
-  |[ initialise-binding finalise-failing run[: (:Pgm:) :] ]|
+  |[ initialise-binding execute[: {(:Stmt*:)} :] ]|
-to-funcons:
-  |[ run[: int(:IL:);(:Stmt:) :] ]| ->
-  |[ scope (collateral (declare-int-vars[: (:IL:) :]), 
-             execute[: (:Stmt:) :]) ]|
-to-funcons:
-  |[ declare-int-vars[: (:Id:) :] ]| ->
-  |[ bind (\"(:Id:)\", 
-             allocate-initialised-variable (integers, 
-                     0)) ]|
-to-funcons:
-  |[ declare-int-vars[: (:Id:),(:IL:) :] ]| ->
-  |[ declare-int-vars[: (:Id:) :], 
-     declare-int-vars[: (:IL:) :] ]|
 

IBAF-Editor/trans/cbs-gen/IBAF-Statements.str

@@ -12,15 +12,58 @@ imports
 // Language "IBAFlang"
 
 rules
+
+// # Statements
+                 
+
 to-funcons:
-  |[ execute[: (:Typ:)(:Id:)=(:Exp:); :] ]| ->
+  |[ execute[: {(:Stmt*:)} :] ]| ->
-  |[ assign (bound (id[: (:Id:) :]), 
+  |[ scope (collateral collect-declared-vars[: (:Stmt*:) :], 
-             eval-exp[: (:Exp:) :]) ]|
+             execute[: (:Stmt*:) :]) ]|
 to-funcons:
   |[ execute[: print((:Exp:)); :] ]| ->
-  |[ print (eval-exp[: (:Exp:) :]) ]|
+  |[ print eval-exp[: (:Exp:) :] ]|
 to-funcons:
-  |[ execute[: (:Stmt1:)(:Stmt2:) :] ]| ->
+  |[ execute[: (:Typ:)(:Id:); :] ]| ->
-  |[ sequential (execute[: (:Stmt1:) :], 
+  |[ null ]|
-             execute[: (:Stmt2:) :]) ]|
+to-funcons:
+  |[ execute[: (:Typ:)(:Id:)=(:Exp:); :] ]| ->
+  |[ assign (bound id[: (:Id:) :], 
+             eval-exp[: (:Exp:) :]) ]|
+to-funcons:
+  |[ execute[: (:Id:)=(:Exp:); :] ]| ->
+  |[ assign (bound id[: (:Id:) :], 
+             eval-exp[: (:Exp:) :]) ]|
+to-funcons:
+  |[ execute[:  :] ]| ->
+  |[ null ]|
+to-funcons:
+  |[ execute[: (:Stmt:)(:Stmt+:) :] ]| ->
+  |[ sequential (execute[: (:Stmt:) :], 
+             execute[: (:Stmt+:) :]) ]|
+
+// # Handling variable declarations
+                 
+
+to-funcons:
+  |[ collect-declared-vars[: (:Typ:)(:Id:)=(:Exp:); :] ]| ->
+  |[ bind (\"(:Id:)\", 
+             allocate-initialised-variable (integers, 
+                     0)) ]|
+to-funcons:
+  |[ collect-declared-vars[: (:Typ:)(:Id:); :] ]| ->
+  |[ bind (\"(:Id:)\", 
+             allocate-initialised-variable (integers, 
+                     0)) ]|
+to-funcons:
+  |[ collect-declared-vars[:  :] ]| ->
+  |[ map () ]|
+to-funcons:
+  |[ collect-declared-vars[: (:Stmt:) :] ]| ->
+  |[ map () ]|
+to-funcons:
+  |[ collect-declared-vars[: (:Stmt1:)(:Stmt2:)(:Stmt*:) :] ]| ->
+  |[ collect-declared-vars[: (:Stmt1:) :], 
+     collect-declared-vars[: (:Stmt2:) :], 
+     collect-declared-vars[: (:Stmt*:) :] ]|
 

IBAF-Tests/IBAF-1/scopes.fct

@@ -0,0 +1,99 @@
+initialise-binding scope
+  (collateral
+     (bind
+        ("z",
+         allocate-initialised-variable
+           (integers,
+            0)),
+      bind
+        ("x",
+         allocate-initialised-variable
+           (integers,
+            0)),
+      map
+        ( ),
+      map
+        ( ),
+      map
+        ( ),
+      map
+        ( ),
+      map
+        ( ),
+      map
+        ( ),
+      map
+        ( )),
+   sequential
+     (assign
+        (bound
+           ("z"),
+         decimal-natural
+           ("5")),
+      assign
+        (bound
+           ("x"),
+         int-mul
+           (decimal-natural
+              ("5"),
+            decimal-natural
+              ("3"))),
+      print
+        (assigned
+           (bound
+              ("x"))),
+      assign
+        (bound
+           ("x"),
+         decimal-natural
+           ("2")),
+      print
+        (int-mul
+           (assigned
+              (bound
+                 ("x")),
+            decimal-natural
+              ("3"))),
+      scope
+        (collateral
+           (bind
+              ("y",
+               allocate-initialised-variable
+                 (integers,
+                  0)),
+            map
+              ( ),
+            map
+              ( )),
+         sequential
+           (assign
+              (bound
+                 ("y"),
+               decimal-natural
+                 ("4")),
+            print
+              (assigned
+                 (bound
+                    ("y"))))),
+      assign
+        (bound
+           ("z"),
+         int-mul
+           (assigned
+              (bound
+                 ("z")),
+            assigned
+              (bound
+                 ("x")))),
+      print
+        (assigned
+           (bound
+              ("z"))),
+      print
+        (int-add
+           (assigned
+              (bound
+                 ("z")),
+            assigned
+              (bound
+                 ("x"))))))

IBAF-Tests/IBAF-1/scopes.ibaf

@@ -0,0 +1,16 @@
+
+int z =5;
+int x =5*3;
+print(x);
+
+x = 2;
+print(x*3);
+
+{
+    int y =4;
+    print (y);
+}
+
+z = z * x;
+print(z);
+print(z+x);

IBAF-Tests/IBAF-1/test.fct

@@ -1,64 +0,0 @@
-initialise-binding finalise-failing scope
-  (collateral
-     (bind
-        ("x",
-         allocate-initialised-variable
-           (integers,
-            0)),
-      bind
-        ("y",
-         allocate-initialised-variable
-           (integers,
-            0))),
-   sequential
-     (assign
-        (bound
-           ("x"),
-         decimal-natural
-           ("10")),
-      assign
-        (bound
-           ("y"),
-         checked int-mod
-           (assigned
-              (bound
-                 ("x")),
-            int-val [: 0 :])),
-      print
-        (assigned
-           (bound
-              ("x"))),
-      print
-        (assigned
-           (bound
-              ("y"))),
-      print
-        (is-equal
-           (assigned
-              (bound
-                 ("x")),
-            decimal-natural
-              ("1"))),
-      print
-        (is-equal
-           (assigned
-              (bound
-                 ("x")),
-            assigned
-              (bound
-                 ("y")))),
-      print
-        (is-less
-           (assigned
-              (bound
-                 ("x")),
-            assigned
-              (bound
-                 ("y")))),
-      print
-        (int-add
-           (assigned
-              (bound
-                 ("x")),
-            decimal-natural
-              ("2")))))

IBAF-Tests/IBAF-1/test.ibaf

@@ -1,4 +1,4 @@
-int x, y;
+int x,y;
 
 int x = 10;
 int y = x % 3;

IBAF-Tests/IBAF-1/test.pp.ibaf

@@ -1 +0,0 @@
-int x , y ; x = 10 % 3 ; y = x + 10 ; print ( x ) ; print ( y ) ;

IBAF-cbs/IBAF/IBAF-Start/IBAF-Expressions.cbs

@@ -25,7 +25,7 @@ Rule eval-exp[[ Int ]] = int-val[[ Int ]]
 Rule eval-exp[[ 'true' ]] = true
 Rule eval-exp[[ 'false' ]] = false
 Rule eval-exp[[ Exp1 '+' Exp2 ]] = int-add(eval-exp[[ Exp1 ]], eval-exp[[ Exp2 ]])
-Rule eval-exp[[ Exp1 '-' Exp2 ]] = int-sub(eval-exp[[ Exp1 ]], eval-exp[[ Exp2 ]])
+Rule eval-exp[[ Exp1 '-' Exp2 ]] = integer-subtract(eval-exp[[ Exp1 ]], eval-exp[[ Exp2 ]]) // For some reason the funcon interpreter doesn't recognise the alias `int-sub` :/
 Rule eval-exp[[ Exp1 '*' Exp2 ]] = int-mul(eval-exp[[ Exp1 ]], eval-exp[[ Exp2 ]])
 Rule eval-exp[[ Exp1 '/' Exp2 ]] = checked int-div(eval-exp[[ Exp1 ]], eval-exp[[ Exp2 ]])
 Rule eval-exp[[ Exp1 '%' Exp2 ]] = checked int-mod(eval-exp[[ Exp1 ]], eval-exp[[ Exp2 ]])

IBAF-cbs/IBAF/IBAF-Start/IBAF-Start.cbs

@@ -1,30 +1,9 @@
 Language "IBAFlang"
     
-Syntax START:start ::= pgm
+Syntax START:start ::= statement*
-    
 Semantics start[[ _:start ]] : =>null-type
+Rule start[[ Stmt* ]] = initialise-binding execute[[ '{' Stmt* '}' ]]
 
-Rule start[[ Pgm ]] = 
-	initialise-binding 
-	finalise-failing 
-	run [[ Pgm ]]
-
-
-
-
-
-Syntax Pgm : pgm ::= 'int' idlist ';' stmt
-
-Semantics run[[ _:pgm ]] : =>null-type
-Rule run[[ 'int' IL ';' Stmt ]] = 
-    scope( collateral(declare-int-vars[[ IL ]]), 
-           execute[[ Stmt ]] )
-
-Syntax IL : idlist ::= id (',' idlist)?
-
-Semantics declare-int-vars[[ _: idlist ]] : (=>environments)+
-Rule declare-int-vars[[ Id ]] = bind(\"Id\", allocate-initialised-variable(integers, 0))
-Rule declare-int-vars[[ Id ',' IL ]] = declare-int-vars[[ Id ]], declare-int-vars[[ IL ]]
 
 
 
@@ -43,5 +22,4 @@ Syntax SDF
 context-free syntax
 ``exp ::= exp '+' exp``  {assoc}
 ``exp ::= exp '&&' exp`` {assoc}
-``stmt ::= stmt stmt``      {right}
 */

IBAF-cbs/IBAF/IBAF-Start/IBAF-Statements.cbs

@@ -1,41 +1,64 @@
 Language "IBAFlang"
 
+# Statements
 
-Syntax Stmt:stmt ::= type id '=' exp ';'
+Syntax Stmt: statement ::= '{' statement* '}'
-				   | 'print' '(' exp ')' ';'
+                    | 'print' '(' exp ')' ';'
-//				   | '{' stmt '}'
+                    | type id ';'
-				   | stmt stmt
+                    | type id '=' exp ';'
-				   
+                    | id '=' exp ';'
 
 Syntax Typ:type ::= 'int'
                    | 'bool'
                    | id
 
-Semantics execute[[ _:stmt ]] : => null
 
-Rule execute[[ Typ Id '=' Exp ';' ]] = assign(bound(id[[ Id ]]), eval-exp[[ Exp ]])
+Semantics execute[[ Stmt*:statement* ]] : => null-type
-Rule execute[[ 'print' '(' Exp ')' ';' ]] = print(eval-exp[[ Exp ]])
+
+Rule execute[[ '{' Stmt* '}' ]] = scope(collateral collect-declared-vars[[ Stmt* ]], execute[[ Stmt* ]])
+Rule execute[[ 'print' '(' Exp ')' ';' ]] = print eval-exp[[ Exp ]]
+Rule execute[[ Typ Id ';' ]] = null
+Rule execute[[ Typ Id '=' Exp ';' ]] = assign(bound id[[ Id ]], eval-exp[[ Exp ]])
+Rule execute[[ Id '=' Exp ';' ]] = assign(bound id[[ Id ]], eval-exp[[ Exp ]])
+
+Rule execute[[ ]] = null
+Rule execute[[ Stmt Stmt+ ]] = sequential(execute[[ Stmt ]], execute[[ Stmt+ ]])
+
+
+
+
+# Handling variable declarations
+
+Semantics collect-declared-vars[[ Stmt*:statement* ]] : (=>environments)+
+
+Rule collect-declared-vars[[ Typ Id '=' Exp ';' ]] = 
+  bind(
+        \"Id\", 
+        allocate-initialised-variable(
+            integers, //TODO: use type
+            0 //TODO: use correct default value for type
+        )
+    )
+Rule collect-declared-vars[[ Typ Id ';' ]] = 
+  bind(
+        \"Id\", 
+        allocate-initialised-variable(
+            integers, //TODO: use type
+            0 //TODO: use correct default value for type
+        )
+    )
+Rule collect-declared-vars[[ ]] = map()
+Rule collect-declared-vars[[ Stmt ]] = map()
+Rule collect-declared-vars[[ Stmt1 Stmt2 Stmt* ]] = collect-declared-vars[[ Stmt1 ]], collect-declared-vars[[ Stmt2 ]], collect-declared-vars[[ Stmt* ]]
+
+
+
+
+
+
 
-//Rule execute[[ '{' Stmt '}' ]] = scope(
-//	collateral(collect-declared-vars[[ Stmt ]]),
-//	execute[[ Stmt ]]
-//)
 
-Rule execute[[ Stmt1 Stmt2 ]] = sequential(execute[[ Stmt1 ]], execute[[ Stmt2 ]])
 
 
 
-//Semantics collect-declared-vars[[ _:stmt ]] : (=>environments)*
-//
-//
-//Rule collect-declared-vars[[ Typ Id '=' Exp ';' ]] = 
-//	bind(
-//		\"Id\", 
-//		allocate-initialised-variable(
-//			integers, //TODO: use type
-//			eval-exp[[ Exp ]]
-//		)
-//	)
-//Rule collect-declared-vars[[ Stmt ]] = null
-//Rule collect-declared-vars[[ Stmt1 Stmt2 ]] = (collect-declared-vars[[ Stmt1 ]], collect-declared-vars[[ Stmt2 ]]))