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File Object

Set of classes and functions to emit the AST from a given source code.

ASTtoOutput

Bases: CodeGenBase

Show the AST for the given source code.

Source code in src/arx/codegen/ast_output.py 
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class ASTtoOutput(CodeGenBase):
    """Show the AST for the given source code."""

    result_stack: List[OutputValueAST]

    def __init__(self) -> None:
        self.result_stack: List[OutputValueAST] = []

    def visit_binary_expr(self, expr: ast.BinaryExprAST) -> None:
        """
        Visit a ast.BinaryExprAST node.

        Parameters
        ----------
            expr: The ast.BinaryExprAST node to visit.
        """
        self.visit(expr.lhs)
        lhs = self.result_stack.pop()

        self.visit(expr.rhs)
        rhs = self.result_stack.pop()

        node = {f"BINARY[{expr.op}]": {"lhs": lhs, "rhs": rhs}}
        self.result_stack.append(node)

    def visit_block(self, expr: ast.BlockAST) -> None:
        """
        Visit method for tree ast.

        Parameters
        ----------
            expr: The ast.BlockAST node to visit.
        """
        block_node = []

        for node in expr.nodes:
            self.visit(node)
            block_node.append(self.result_stack.pop())

        self.result_stack.append(block_node)

    def visit_call_expr(self, expr: ast.CallExprAST) -> None:
        """
        Visit a ast.CallExprAST node.

        Parameters
        ----------
            expr: The ast.CallExprAST node to visit.
        """
        call_args = []

        for node in expr.args:
            self.visit(node)
            call_args.append(self.result_stack.pop())

        call_node = {f"CALL[{expr.callee}]": {"args": call_args}}
        self.result_stack.append(call_node)

    def visit_float_expr(self, expr: ast.FloatExprAST) -> None:
        """
        Visit a ast.FloatExprAST node.

        Parameters
        ----------
            expr: The ast.FloatExprAST node to visit.
        """
        self.result_stack.append(f"FLOAT[{expr.value}]")

    def visit_if_stmt(self, expr: ast.IfStmtAST) -> None:
        """
        Visit an ast.IfStmtAST node.

        Parameters
        ----------
            expr: The ast.IfStmtAST node to visit.
        """
        self.visit(expr.cond)
        if_condition = self.result_stack.pop()

        self.visit(expr.then_)
        if_then = self.result_stack.pop()

        if expr.else_:
            self.visit(expr.else_)
            if_else = self.result_stack.pop()
        else:
            if_else = []

        node = {
            "IF-STMT": {
                "CONDITION": if_condition,
                "THEN": if_then,
            }
        }

        if if_else:
            node["IF-STMT"]["ELSE"] = if_else

        self.result_stack.append(node)

    def visit_for_stmt(self, expr: ast.ForStmtAST) -> None:
        """
        Visit a ast.ForStmtAST node.

        Parameters
        ----------
            expr: The ast.ForStmtAST node to visit.
        """
        self.visit(expr.start)
        for_start = self.result_stack.pop()

        self.visit(expr.end)
        for_end = self.result_stack.pop()

        self.visit(expr.step)
        for_step = self.result_stack.pop()

        self.visit(expr.body)
        for_body = self.result_stack.pop()

        node = {
            "FOR-STMT": {
                "start": for_start,
                "end": for_end,
                "step": for_step,
                "body": for_body,
            }
        }
        self.result_stack.append(node)

    def visit_function(self, expr: ast.FunctionAST) -> None:
        """
        Visit a ast.FunctionAST node.

        Parameters
        ----------
            expr: The ast.FunctionAST node to visit.
        """
        fn_args = []
        for node in expr.proto.args:
            self.visit(node)
            fn_args.append(self.result_stack.pop())

        self.visit(expr.body)
        fn_body = self.result_stack.pop()

        fn = {}
        fn[f"FUNCTION[{expr.proto.name}]"] = {
            "args": fn_args,
            "body": fn_body,
        }

        self.result_stack.append(fn)

    def visit_module(self, expr: ast.ModuleAST) -> None:
        """
        Visit method for tree ast.

        Parameters
        ----------
            expr: The ast.BlockAST node to visit.
        """
        block_node = []

        for node in expr.nodes:
            self.visit(node)
            block_node.append(self.result_stack.pop())

        module_node = {f"MODULE[{expr.name}]": block_node}

        self.result_stack.append(module_node)

    def visit_prototype(self, expr: ast.PrototypeAST) -> None:
        """
        Visit a ast.PrototypeAST node.

        Parameters
        ----------
            expr: The ast.PrototypeAST node to visit.
        """
        raise Exception("Visitor method not necessary")

    def visit_return_stmt(self, expr: ast.ReturnStmtAST) -> None:
        """
        Visit a ast.ReturnStmtAST node.

        Parameters
        ----------
            expr: The ast.ReturnStmtAST node to visit.
        """
        self.visit(expr.value)
        node = {"RETURN": self.result_stack.pop()}
        self.result_stack.append(node)

    def visit_unary_expr(self, expr: ast.UnaryExprAST) -> None:
        """
        Visit a ast.UnaryExprAST node.

        Parameters
        ----------
            expr: The ast.UnaryExprAST node to visit.
        """
        self.visit(expr.operand)
        node = {f"UNARY[{expr.op_code}]": self.result_stack.pop()}
        self.result_stack.append(node)

    def visit_var_expr(self, expr: ast.VarExprAST) -> None:
        """
        Visit a ast.VarExprAST node.

        Parameters
        ----------
            expr: The ast.VarExprAST node to visit.
        """
        raise Exception("Variable declaration will be changed soon.")

    def visit_variable_expr(self, expr: ast.VariableExprAST) -> None:
        """
        Visit a ast.VariableExprAST node.

        Parameters
        ----------
            expr: The ast.VariableExprAST node to visit.
        """
        self.result_stack.append(f"VARIABLE[{expr.name, expr.type_name}]")

    def emit_ast(self, tree_ast: ast.BlockAST) -> None:
        """Print the AST for the given source code."""
        self.visit_block(tree_ast)

        ast_output = {"ROOT": self.result_stack.pop()}
        print(yaml.dump(ast_output, sort_keys=False))

emit_ast(tree_ast)

Print the AST for the given source code.

Source code in src/arx/codegen/ast_output.py 
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def emit_ast(self, tree_ast: ast.BlockAST) -> None:
    """Print the AST for the given source code."""
    self.visit_block(tree_ast)

    ast_output = {"ROOT": self.result_stack.pop()}
    print(yaml.dump(ast_output, sort_keys=False))

visit_binary_expr(expr)

Visit a ast.BinaryExprAST node.

Parameters
expr: The ast.BinaryExprAST node to visit.
Source code in src/arx/codegen/ast_output.py 
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def visit_binary_expr(self, expr: ast.BinaryExprAST) -> None:
    """
    Visit a ast.BinaryExprAST node.

    Parameters
    ----------
        expr: The ast.BinaryExprAST node to visit.
    """
    self.visit(expr.lhs)
    lhs = self.result_stack.pop()

    self.visit(expr.rhs)
    rhs = self.result_stack.pop()

    node = {f"BINARY[{expr.op}]": {"lhs": lhs, "rhs": rhs}}
    self.result_stack.append(node)

visit_block(expr)

Visit method for tree ast.

Parameters
expr: The ast.BlockAST node to visit.
Source code in src/arx/codegen/ast_output.py 
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def visit_block(self, expr: ast.BlockAST) -> None:
    """
    Visit method for tree ast.

    Parameters
    ----------
        expr: The ast.BlockAST node to visit.
    """
    block_node = []

    for node in expr.nodes:
        self.visit(node)
        block_node.append(self.result_stack.pop())

    self.result_stack.append(block_node)

visit_call_expr(expr)

Visit a ast.CallExprAST node.

Parameters
expr: The ast.CallExprAST node to visit.
Source code in src/arx/codegen/ast_output.py 
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def visit_call_expr(self, expr: ast.CallExprAST) -> None:
    """
    Visit a ast.CallExprAST node.

    Parameters
    ----------
        expr: The ast.CallExprAST node to visit.
    """
    call_args = []

    for node in expr.args:
        self.visit(node)
        call_args.append(self.result_stack.pop())

    call_node = {f"CALL[{expr.callee}]": {"args": call_args}}
    self.result_stack.append(call_node)

visit_float_expr(expr)

Visit a ast.FloatExprAST node.

Parameters
expr: The ast.FloatExprAST node to visit.
Source code in src/arx/codegen/ast_output.py 
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def visit_float_expr(self, expr: ast.FloatExprAST) -> None:
    """
    Visit a ast.FloatExprAST node.

    Parameters
    ----------
        expr: The ast.FloatExprAST node to visit.
    """
    self.result_stack.append(f"FLOAT[{expr.value}]")

visit_for_stmt(expr)

Visit a ast.ForStmtAST node.

Parameters
expr: The ast.ForStmtAST node to visit.
Source code in src/arx/codegen/ast_output.py 
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def visit_for_stmt(self, expr: ast.ForStmtAST) -> None:
    """
    Visit a ast.ForStmtAST node.

    Parameters
    ----------
        expr: The ast.ForStmtAST node to visit.
    """
    self.visit(expr.start)
    for_start = self.result_stack.pop()

    self.visit(expr.end)
    for_end = self.result_stack.pop()

    self.visit(expr.step)
    for_step = self.result_stack.pop()

    self.visit(expr.body)
    for_body = self.result_stack.pop()

    node = {
        "FOR-STMT": {
            "start": for_start,
            "end": for_end,
            "step": for_step,
            "body": for_body,
        }
    }
    self.result_stack.append(node)

visit_function(expr)

Visit a ast.FunctionAST node.

Parameters
expr: The ast.FunctionAST node to visit.
Source code in src/arx/codegen/ast_output.py 
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def visit_function(self, expr: ast.FunctionAST) -> None:
    """
    Visit a ast.FunctionAST node.

    Parameters
    ----------
        expr: The ast.FunctionAST node to visit.
    """
    fn_args = []
    for node in expr.proto.args:
        self.visit(node)
        fn_args.append(self.result_stack.pop())

    self.visit(expr.body)
    fn_body = self.result_stack.pop()

    fn = {}
    fn[f"FUNCTION[{expr.proto.name}]"] = {
        "args": fn_args,
        "body": fn_body,
    }

    self.result_stack.append(fn)

visit_if_stmt(expr)

Visit an ast.IfStmtAST node.

Parameters
expr: The ast.IfStmtAST node to visit.
Source code in src/arx/codegen/ast_output.py 
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def visit_if_stmt(self, expr: ast.IfStmtAST) -> None:
    """
    Visit an ast.IfStmtAST node.

    Parameters
    ----------
        expr: The ast.IfStmtAST node to visit.
    """
    self.visit(expr.cond)
    if_condition = self.result_stack.pop()

    self.visit(expr.then_)
    if_then = self.result_stack.pop()

    if expr.else_:
        self.visit(expr.else_)
        if_else = self.result_stack.pop()
    else:
        if_else = []

    node = {
        "IF-STMT": {
            "CONDITION": if_condition,
            "THEN": if_then,
        }
    }

    if if_else:
        node["IF-STMT"]["ELSE"] = if_else

    self.result_stack.append(node)

visit_module(expr)

Visit method for tree ast.

Parameters
expr: The ast.BlockAST node to visit.
Source code in src/arx/codegen/ast_output.py 
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def visit_module(self, expr: ast.ModuleAST) -> None:
    """
    Visit method for tree ast.

    Parameters
    ----------
        expr: The ast.BlockAST node to visit.
    """
    block_node = []

    for node in expr.nodes:
        self.visit(node)
        block_node.append(self.result_stack.pop())

    module_node = {f"MODULE[{expr.name}]": block_node}

    self.result_stack.append(module_node)

visit_prototype(expr)

Visit a ast.PrototypeAST node.

Parameters
expr: The ast.PrototypeAST node to visit.
Source code in src/arx/codegen/ast_output.py 
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def visit_prototype(self, expr: ast.PrototypeAST) -> None:
    """
    Visit a ast.PrototypeAST node.

    Parameters
    ----------
        expr: The ast.PrototypeAST node to visit.
    """
    raise Exception("Visitor method not necessary")

visit_return_stmt(expr)

Visit a ast.ReturnStmtAST node.

Parameters
expr: The ast.ReturnStmtAST node to visit.
Source code in src/arx/codegen/ast_output.py 
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def visit_return_stmt(self, expr: ast.ReturnStmtAST) -> None:
    """
    Visit a ast.ReturnStmtAST node.

    Parameters
    ----------
        expr: The ast.ReturnStmtAST node to visit.
    """
    self.visit(expr.value)
    node = {"RETURN": self.result_stack.pop()}
    self.result_stack.append(node)

visit_unary_expr(expr)

Visit a ast.UnaryExprAST node.

Parameters
expr: The ast.UnaryExprAST node to visit.
Source code in src/arx/codegen/ast_output.py 
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def visit_unary_expr(self, expr: ast.UnaryExprAST) -> None:
    """
    Visit a ast.UnaryExprAST node.

    Parameters
    ----------
        expr: The ast.UnaryExprAST node to visit.
    """
    self.visit(expr.operand)
    node = {f"UNARY[{expr.op_code}]": self.result_stack.pop()}
    self.result_stack.append(node)

visit_var_expr(expr)

Visit a ast.VarExprAST node.

Parameters
expr: The ast.VarExprAST node to visit.
Source code in src/arx/codegen/ast_output.py 
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def visit_var_expr(self, expr: ast.VarExprAST) -> None:
    """
    Visit a ast.VarExprAST node.

    Parameters
    ----------
        expr: The ast.VarExprAST node to visit.
    """
    raise Exception("Variable declaration will be changed soon.")

visit_variable_expr(expr)

Visit a ast.VariableExprAST node.

Parameters
expr: The ast.VariableExprAST node to visit.
Source code in src/arx/codegen/ast_output.py 
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def visit_variable_expr(self, expr: ast.VariableExprAST) -> None:
    """
    Visit a ast.VariableExprAST node.

    Parameters
    ----------
        expr: The ast.VariableExprAST node to visit.
    """
    self.result_stack.append(f"VARIABLE[{expr.name, expr.type_name}]")