✨

documentation/plthy.tex

@@ -57,5 +57,7 @@
     \end{enumerate}
     \begin{enumerate}[label={\textbf{C\protect\threedigits{\theenumi}:}}, leftmargin = *]
         \item Because assertion incorrect
+        \item Unknown error
+        \item Incorrect type
     \end{enumerate}
 \end{document}

examples/pol_not_calc.plthy

@@ -0,0 +1,32 @@
+hello|
+define split<1> as [
+    set {} -> list|
+    set '' -> word|
+    set 0 -> i|
+    do [
+        do [
+            set variable list + {variable word;} -> list|
+            set '' -> word|
+        ] else [
+            set variable word + argument #1{variable i} -> word|
+        ] if argument #1{variable i} = ' '|
+        set variable i + 1 -> i|
+    ] until variable i = do len<argument #1;>|
+    do skip else set variable list + {variable word;} -> list if variable word = ''|
+    return variable list|
+]|
+
+define calc<1> as [
+    set {} -> middle|
+    set 1 -> i|
+    do [
+        set variable middle + {argument #1{variable i};} -> middle|
+        set variable i + 1 -> i|
+    ] until variable i = do len<argument #1;> - 1|
+    return variable middle|
+]|
+
+set do input<':';> -> x|
+set do "split"<variable x;> -> list|
+do print<do "calc"<variable list;>;>|
+goodbye|

plthy_impl/ast_nodes.py

@@ -7,7 +7,10 @@ BUILTIN_ARGS = {
     "print": "*",
     "input" : "*",
     "random": 2,
-    "len": 1
+    "len": 1,
+    "int": 1,
+    "str": 1,
+    "flo": 1
 }
 
 def rep_join(l):
@@ -36,6 +39,26 @@ class ExpInt(Exp):
     def eval(self, vtable, ftable):
         return vtable, ftable, self.value
 
+class ExpFloat(Exp):
+    def __init__(self, value: int):
+        self.value = value
+
+    def __repr__(self) -> str:
+        return f"exp_float({self.value})"
+
+    def eval(self, vtable, ftable):
+        return vtable, ftable, self.value
+
+class ExpBool(Exp):
+    def __init__(self, value: int):
+        self.value = value
+
+    def __repr__(self) -> str:
+        return f"exp_bool({self.value})"
+
+    def eval(self, vtable, ftable):
+        return vtable, ftable, self.value
+
 class ExpString(Exp):
     def __init__(self, value: str):
         self.value = value
@@ -67,23 +90,11 @@ class ExpABinop(Exp):
 
     def eval(self, vtable, ftable):
         vtable, ftable, r1 = self.exp1.eval(vtable, ftable)
-        if isinstance(r1,str):
-            if r1.isdigit():
-                r1 = int(r1)
-            else:
-                try:
-                    r1 = float(r1)
-                except ValueError:
-                    pass
         vtable, ftable, r2 = self.exp2.eval(vtable, ftable)
-        if isinstance(r2,str):
+
-            if r2.isdigit():
+        if not (type(r1) is type(r2) or (type(r1) is float and type(r2) is int) or (type(r1) is int and type(r2) is float)):
-                r2 = int(r2)
+            print(f"C003: Incorrect type pairing {type(r1)} and {type(r2)} for {self.op}")
-            else:
+
-                try:
-                    r2 = float(r2)
-                except ValueError:
-                    pass
         if self.op == "+":
             return vtable, ftable, r1+r2
         elif self.op == "-":
@@ -175,7 +186,14 @@ class Builtin(Command):
             prints = []
             for arg in self.args:
                 vtable, ftable, result = arg.eval(vtable, ftable)
-                prints.append(str(result))
+                if isinstance(result, str) or isinstance(result, int) or isinstance(result, float):
+                    prints.append(str(result))
+                elif isinstance(result, list):
+                    result = f"{'{'}{''.join([str(i)+";" for i in result])}{'}'}"
+                    prints.append(str(result))
+                else:
+                    print(f"C003: Incorrect type {type(result)} for builtin print")
+                    exit()
 
             print("   ".join(prints))
 
@@ -204,6 +222,10 @@ class Builtin(Command):
             vtable, ftable, result = self.args[0].eval(vtable,ftable)
 
             return vtable, ftable, len(result)
+        elif self.builtin == "int":
+            vtable, ftable, result = self.args[0].eval(vtable,ftable)
+
+            return vtable, ftable, int(result)
         else:
             raise Exception(f"Unknown builtin {self.builtin}")
 
@@ -281,7 +303,6 @@ class Scope(Statement):
             vtable, ftable, _ = statement.eval(vtable, ftable)
             if "#return" in vtable:
                 result = vtable["#return"]
-                del vtable["#return"]
                 break
 
         return vtable, ftable, result
@@ -417,6 +438,12 @@ class Program(BaseBox):
         ftable = {}
 
         for statement in self.statements:
-            vtable, ftable, _ = statement.eval(vtable, ftable)
+            try:
+                vtable, ftable, _ = statement.eval(vtable, ftable)
+            except Exception as e:
+                print(f"C002: Unknown error in statement {statement}")
+                raise e
             if "#return" in vtable:
-                break
+                del vtable["#return"]
+                if not isinstance(vtable,Scope):
+                    break

plthy_impl/lexer.py

@@ -25,13 +25,18 @@ BUILTIN_TOKENS = [("BUILTIN", i+"<") for i in [
     "print",
     "input",
     "random",
-    "len"
+    "len",
+    "int",
+    "str",
+    "flo"
 ]]
 
 DATA_TOKENS = [
     ("DATA_STRING", r"\'.*?\'"),
     ("DATA_INT", r"\d+"),
-    ("DATA_FLOAT", r"\d+(\.\d+)")
+    ("DATA_FLOAT", r"\d+(\.\d+)"),
+    ("DATA_BOOL", "true"),
+    ("DATA_BOOL", "false")
 ]
 
 SYMBOL_TOKENS = [

plthy_impl/parser.py

@@ -106,9 +106,12 @@ class Parser():
 
         @self.pg.production('expression : DATA_FLOAT')
         def exp_float(tokens):
-            return ast_nodes.ExpInt(float(tokens[0].value))
+            return ast_nodes.ExpFloat(float(tokens[0].value))
 
-        # Boolean
+        @self.pg.production('expression : DATA_BOOL')
+        def exp_bool(tokens):
+
+            return ast_nodes.ExpBool(tokens[0].value == "true")
 
         @self.pg.production('expression : SYMBOL_LCURL expressions SYMBOL_RCURL')
         def exp_list(tokens):

tests/12_list.expected

@@ -1,3 +1,3 @@
-[1, 2, 3]
+{1;2;3;}
 3
 2

tests/22_reverse.expected

@@ -0,0 +1 @@
+{5;4;3;2;1;}

tests/22_reverse.plthy

@@ -0,0 +1,10 @@
+hello|
+set {1;2;3;4;5;} -> list|
+set {} -> reversed|
+set 0 -> i|
+do [
+    set {variable list{variable i};} + variable reversed -> reversed|
+    set variable i + 1 -> i|
+] until variable i = do len<variable list;>|
+do print<variable reversed;>|
+goodbye|

tests/23_int.expected

@@ -0,0 +1 @@
+4

tests/23_int.plthy

@@ -0,0 +1,4 @@
+hello|
+set '2' -> x|
+do print<2 + do int<variable x;>;>|
+goodbye|