README.md

@@ -11,7 +11,7 @@ Another JavaScript interpreter written on Python 3.
 
 To run tests:
 
-- pytest
+- pylint
 - Tox
 
 You can get ANTLR [here](https://www.antlr.org/), other dependencies could be installed with pip:

grammars/JavaScriptLexer.g4

@@ -37,7 +37,7 @@ options { superClass=JavaScriptBaseLexer; }
 HashBangLine:                   { self.isStartOfFile()}? '#!' ~[\r\n\u2028\u2029]*; // only allowed at start
 MultiLineComment:               '/*' .*? '*/'             -> channel(HIDDEN);
 SingleLineComment:              '//' ~[\r\n\u2028\u2029]* -> channel(HIDDEN);
-//RegularExpressionLiteral:       '/' RegularExpressionFirstChar RegularExpressionChar* {self.isRegexPossible()}? '/' IdentifierPart*;
+RegularExpressionLiteral:       '/' RegularExpressionFirstChar RegularExpressionChar* {self.isRegexPossible()}? '/' IdentifierPart*;
 
 OpenBracket:                    '[';
 CloseBracket:                   ']';

grammars/JavaScriptParser.g4

@@ -403,7 +403,7 @@ literal
     | BooleanLiteral
     | StringLiteral
 //    | TemplateStringLiteral
-//    | RegularExpressionLiteral
+    | RegularExpressionLiteral
     | numericLiteral
     | bigintLiteral
     ;

jasminesnake/__init__.py

@@ -3,7 +3,7 @@ So here it is.
 """
 import logging
 
-__version__ = "0.0.9"
+__version__ = "0.0.7"
 __snake__ = r"""
    _________         _________
   /         \       /         \
@@ -32,5 +32,4 @@ LOG_LEVELS = {
     },
 }
 
-
 # TODO: make it usable as a module too

jasminesnake/ast/nodes.py

@@ -1059,35 +1059,6 @@ class BigIntLiteral(Literal):
         self._fields.update({"bigint": self.bigint})
 
 
-class NullLiteral(Literal):
-    def __init__(self, loc: Optional[SourceLocation]):
-        super().__init__(loc, None)
-
-    def __str__(self):
-        return "null"
-
-
-class BooleanLiteral(Literal):
-    def __init__(self, loc: Optional[SourceLocation], value: bool):
-        super().__init__(loc, value)
-
-    def __str__(self):
-        return str(self.value).lower()
-
-
-class StringLiteral(Literal):
-    def __init__(self, loc: Optional[SourceLocation], value: str):
-        super().__init__(loc, value)
-
-    def __str__(self):
-        return f'"{self.value}"'
-
-
-class NumericLiteral(Literal):
-    def __init__(self, loc: Optional[SourceLocation], value: number):
-        super().__init__(loc, value)
-
-
 # "Property" block
 
 

jasminesnake/ast/parse_tree_listeners.py

@@ -6,11 +6,9 @@ Todo:
     * Fill `source` field in SourceLocation and pass it to each `_get_source_location()` call.
     * Compare `SourceLocation` creation behavior with the one in Acorn/ESPrima
 """
-
 import logging
 from typing import Optional, List, Union
 import antlr4.ParserRuleContext
-from antlr4 import ErrorNode, ParserRuleContext
 
 from ..lex.JavaScriptParser import JavaScriptParser
 from ..lex.JavaScriptParserListener import JavaScriptParserListener as JSBaseListener
@@ -33,78 +31,7 @@ def _get_source_location(
     return nodes.SourceLocation(source=source, start=start_pos, end=end_pos)
 
 
-class NodeListener(JSBaseListener):
-    def visitErrorNode(self, node: ErrorNode):
-        pass
-
-    def enterEveryRule(self, ctx: ParserRuleContext):
-        pass
-
-
-class LiteralListener(JSBaseListener):
-    _literal: nodes.Literal
-
-    @property
-    def literal(self):
-        return self._literal
-
-    def enterLiteral(self, ctx: JavaScriptParser.LiteralContext):
-        loc = _get_source_location(ctx, None)
-        if ctx.NullLiteral() is not None:
-            self._literal = nodes.NullLiteral(loc)
-        elif ctx.BooleanLiteral() is not None:
-            value = ctx.BooleanLiteral().getText() == "true"
-            self._literal = nodes.BooleanLiteral(loc, value)
-        elif ctx.StringLiteral() is not None:
-            self._literal = nodes.StringLiteral(loc, ctx.StringLiteral().getText())
-        else:
-            ctx.getChild(0).enterRule(self)
-
-    def enterNumericLiteral(self, ctx: JavaScriptParser.NumericLiteralContext):
-        # Thank you, PEP-515, very cool!
-        loc = _get_source_location(ctx, None)
-        value = float(ctx.DecimalLiteral().getText())
-        self._literal = nodes.NumericLiteral(loc, value)
-
-    def enterBigintLiteral(self, ctx: JavaScriptParser.BigintLiteralContext):
-        raise NotImplementedError("Bigint literals")
-
-
-class ExpressionListener(JSBaseListener):
-    _expr: nodes.Expression
-
-    @property
-    def expression(self):
-        return self._expr
-
-    def enterExpressionStatement(
-        self, ctx: JavaScriptParser.ExpressionStatementContext
-    ):
-        ctx.expressionSequence().enterRule(self)
-
-    def enterExpressionSequence(self, ctx: JavaScriptParser.ExpressionSequenceContext):
-        expressions: List[nodes.Expression] = []
-        loc = _get_source_location(ctx, None)
-        for expr in ctx.singleExpression():
-            expr_listener = ExpressionListener()
-            expr.enterRule(expr_listener)
-            expressions.append(expr_listener.expression)
-        self._expr = nodes.SequenceExpression(loc, expressions)
-
-    def enterParenthesizedExpression(
-        self, ctx: JavaScriptParser.ParenthesizedExpressionContext
-    ):
-        ctx.expressionSequence().enterRule(self)
-
-    def enterLiteralExpression(self, ctx: JavaScriptParser.LiteralExpressionContext):
-        literal_listener = LiteralListener()
-        ctx.literal().enterRule(literal_listener)
-        self._expr = literal_listener.literal
-
-    # TODO single expression
-
-
-class AssignableListener(NodeListener):
+class AssignableListener(JSBaseListener):
     _result: Union[nodes.Identifier, nodes.ObjectPattern, nodes.ArrayPattern]
 
     @property
@@ -143,11 +70,11 @@ class VariableDeclarationListener(JSBaseListener):
         assign_listener = AssignableListener()
         ctx.assignable().enterRule(assign_listener)
 
-        init = None  # or value from ExpressionListener
         if ctx.singleExpression() is not None:
-            expression_listener = ExpressionListener()
-            ctx.singleExpression().enterRule(expression_listener)
-            init = expression_listener.expression
+            raise NotImplementedError("VariableDeclarator initialization")
+
+        # ctx.singleExpression().enterRule(expression_listener)  # FIXME No ExpressionListener yet
+        init = None  # value from ExpressionListener
 
         self._var_decl = nodes.VariableDeclarator(loc, assign_listener.result, init)
 
@@ -161,17 +88,6 @@ class StatementListener(JSBaseListener):
 
         return self._stmt
 
-    def __init__(self, in_loop: bool = False, in_func: bool = False):
-        """
-        Statement listener. Generates a Statement.
-
-        Args:
-            in_loop (bool): allow `continue` and `break` statements
-            in_func (bool): allow `return` statement
-        """
-        self._in_loop = in_loop
-        self._in_func = in_func
-
     def enterStatement(self, ctx: JavaScriptParser.StatementContext):
         """Obtain an actual statement."""
         logging.debug("Entered section Statement")
@@ -221,17 +137,17 @@ class StatementListener(JSBaseListener):
     def enterExpressionStatement(
         self, ctx: JavaScriptParser.ExpressionStatementContext
     ):
-        """Listener for ExpressionStatement."""
+        """Listener for ExpressionStatement.
+        TODO: check up expression containers.
+        """
         logging.debug("Entered section ExpressionStatement")
-        expr_listener = ExpressionListener()
-        ctx.expressionSequence().enterRule(expr_listener)
-        loc = _get_source_location(ctx, None)
-        self._stmt = nodes.ExpressionStatement(loc, expr_listener.expression)
+        raise NotImplementedError("ExpressionStatement")
 
     def enterIfStatement(self, ctx: JavaScriptParser.IfStatementContext):
         """Listener for IfStatement."""
         logging.debug("Entered section IfStatement")
-        raise NotImplementedError("IfStatement")
+        raise NotImplementedError("ExpressionStatement")  # FIXME
+        pass
 
     def enterFunctionDeclaration(
         self, ctx: JavaScriptParser.FunctionDeclarationContext
@@ -240,54 +156,7 @@ class StatementListener(JSBaseListener):
         logging.debug("Entered section FunctionDeclaration")
         raise NotImplementedError("FunctionDeclaration")
 
-    def enterDoStatement(self, ctx: JavaScriptParser.DoStatementContext):
-        """Listener for DoStatement (do-while)."""
-        raise NotImplementedError("DoWhileStatement")
-
-    def enterWhileStatement(self, ctx: JavaScriptParser.WhileStatementContext):
-        """Listener for WhileStatement."""
-        logging.debug("Entered section WhileStatement")
-        raise NotImplementedError("WhileStatement")
-
-    def enterForStatement(self, ctx: JavaScriptParser.ForStatementContext):
-        """Listener for ForStatement."""
-        logging.debug("Entered section ForStatement")
-        raise NotImplementedError("ForStatement")
-
-    def enterForInStatement(self, ctx: JavaScriptParser.ForInStatementContext):
-        """Listener for ForInStatement."""
-        logging.debug("Entered section ForInStatement")
-        raise NotImplementedError("ForInStatement")
-
-    def enterContinueStatement(self, ctx: JavaScriptParser.ContinueStatementContext):
-        logging.debug("Entered section ContinueStatement")
-        raise NotImplementedError("ContinueStatement")
-
-    def enterBreakStatement(self, ctx: JavaScriptParser.BreakStatementContext):
-        logging.debug("Entered BreakStatement")
-        raise NotImplementedError("BreakStatement")
-
-    def enterReturnStatement(self, ctx: JavaScriptParser.ReturnStatementContext):
-        logging.debug("Entered ReturnStatement")
-        raise NotImplementedError("ReturnStatement")
-
-    def enterImportStatement(self, ctx: JavaScriptParser.ImportStatementContext):
-        logging.debug("Entered ImportStatement")
-        raise NotImplementedError("ImportStatement")
-
-    def enterExportDeclaration(self, ctx: JavaScriptParser.ExportDeclarationContext):
-        logging.debug("Entered ExportDeclaration")
-        raise NotImplementedError("ExportDeclaration")
-
-    def enterExportDefaultDeclaration(
-        self, ctx: JavaScriptParser.ExportDefaultDeclarationContext
-    ):
-        logging.debug("Entered ExportDefaultDeclaration")
-        raise NotImplementedError("ExportDefaultDeclaration")
-
-    def enterClassDeclaration(self, ctx: JavaScriptParser.ClassDeclarationContext):
-        logging.debug("Entered ClassDeclaration")
-        raise NotImplementedError("ClassDeclaration")
+    # TODO: import/export, ClassDeclaration, iter statements, continue. break, return
 
 
 class SourceElementListener(JSBaseListener):

jasminesnake/lex/ErrorListeners.py

@@ -1,19 +1,15 @@
 from antlr4.error.ErrorListener import ErrorListener
 import logging
 
-from antlr4.error.Errors import ParseCancellationException
-
 
 class LogErrorListener(ErrorListener):
     def __init__(self):
         super().__init__()
 
     def syntaxError(self, recognizer, offendingSymbol, line, column, msg, e):
-        logging.critical("SyntaxError: %s", msg)
-        raise ParseCancellationException("Syntax Error lol")
-        # logging.debug(
-        #     "{}\n{}\n{}\n{}\n{}".format(offendingSymbol, line, column, msg, e)
-        # )
+        logging.debug(
+            "{}\n{}\n{}\n{}\n{}".format(offendingSymbol, line, column, msg, e)
+        )
 
     def reportAmbiguity(
         self, recognizer, dfa, startIndex, stopIndex, exact, ambigAlts, configs

tests/apr30_bug.js

@@ -1,2 +0,0 @@
-// Guess what? It should be parsable, but it's not (git rev 44d7e241)
-{let a = 15, b; {1_337.2_28, false, "String"}}

tests/test.js

@@ -1,15 +0,0 @@
-// The code below won't work since the grammar treat Unicode
-//"\x20\x77hil\x65\x20exe\x63uting c\x6cient e\x76\145\x6et ";
-
-//{let a = 15, b}
-
-
-{{{let t = false, n = true}}}
-//++a15;
-var a, b=14;
-let c;
-;
-4444444444444444444444;
-//228,1444444444444;t,fnm
-//if (1) 0;
-//function f4444444(){}

tox.ini

@@ -1,5 +1,5 @@
 [pytest]
-envlist = py37,py38
+envlist = py38
 
 [testenv]
 changedir = tests