初始提交，未完全测试

template/stat/ast/Define.py

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+#!/usr/bin/env python3.9
+# -*- coding: utf-8 -*-
+"""
+JFinal Define - Template Function Definition
+"""
+
+from .Stat import Stat
+from ..Scope import Scope
+from ...Env import Env
+
+class Define(Stat):
+    """Template function definition"""
+    
+    def __init__(self, function_name: str):
+        """
+        Initialize define statement
+        
+        Args:
+            function_name: Function name
+        """
+        self._function_name = function_name
+    
+    def exec(self, env: Env, scope: Scope, writer) -> None:
+        """
+        Execute define statement
+        
+        Args:
+            env: Template environment
+            scope: Execution scope
+            writer: Output writer
+        """
+        # Register the function with the environment
+        env.add_function(self._function_name, self)
+    
+    def get_function_name(self) -> str:
+        """Get function name"""
+        return self._function_name
+    
+    def set_env_for_dev_mode(self, env: Env):
+        """Set environment for dev mode"""
+        pass
+    
+    def is_source_modified_for_dev_mode(self) -> bool:
+        """Check if source is modified (for dev mode)"""
+        return False
+    
+    def __repr__(self) -> str:
+        return f"Define({self._function_name})"

template/stat/ast/For.py

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+#!/usr/bin/env python3.9
+# -*- coding: utf-8 -*-
+"""
+JFinal For - For Directive
+"""
+
+from typing import Optional
+from .Stat import Stat, StatList
+from ..Scope import Scope
+from ...Env import Env
+
+class For(Stat):
+    """For loop directive"""
+    
+    def __init__(self, var_name: str, iter_expr: str, body: Stat):
+        """
+        Initialize for directive
+        
+        Args:
+            var_name: Loop variable name
+            iter_expr: Expression to iterate over
+            body: Loop body
+        """
+        self._var_name = var_name
+        self._iter_expr = iter_expr
+        self._body = body
+    
+    def exec(self, env: Env, scope: Scope, writer) -> None:
+        """
+        Execute for loop
+        
+        Args:
+            env: Template environment
+            scope: Execution scope
+            writer: Output writer
+        """
+        try:
+            # Get the iterable from the expression
+            iterable = eval(self._iter_expr, {}, scope._data.copy())
+            
+            # Convert iterable to list for easier manipulation
+            items = list(iterable)
+            size = len(items)
+            
+            # Create a ForLoopInfo class to hold loop information
+            class ForLoopInfo:
+                def __init__(self, size, index, outer=None):
+                    self._size = size
+                    self._index = index
+                    self._outer = outer
+                
+                @property
+                def size(self):
+                    return self._size
+                
+                @property
+                def index(self):
+                    return self._index
+                
+                @property
+                def count(self):
+                    return self._index + 1
+                
+                @property
+                def first(self):
+                    return self._index == 0
+                
+                @property
+                def last(self):
+                    return self._index == self._size - 1
+                
+                @property
+                def odd(self):
+                    return self._index % 2 == 0
+                
+                @property
+                def even(self):
+                    return self._index % 2 == 1
+                
+                @property
+                def outer(self):
+                    return self._outer
+            
+            # Get outer for info if exists
+            outer_for = scope._data.get("for")
+            
+            # Iterate over the items
+            for index, item in enumerate(items):
+                # Create for loop info
+                for_loop = ForLoopInfo(size, index, outer_for)
+                
+                # Create a new scope for this iteration
+                loop_scope = Scope(scope._data.copy(), scope._shared_objects.copy())
+                loop_scope.set_parent(scope)
+                loop_scope._data[self._var_name] = item
+                loop_scope._data["for"] = for_loop
+                
+                # Execute the loop body
+                if self._body:
+                    self._body.exec(env, loop_scope, writer)
+        except Exception as e:
+            # Handle errors gracefully
+            writer.write(f"Error in for loop: {e}")
+    
+    def __repr__(self) -> str:
+        return f"For(var={self._var_name}, expr={self._iter_expr})"

template/stat/ast/Output.py

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+#!/usr/bin/env python3.9
+# -*- coding: utf-8 -*-
+"""
+JFinal Output - Output Directive
+"""
+
+from .Stat import Stat
+from ..Scope import Scope
+from ...Env import Env
+from ...expr.ast import ExprList
+
+class Output(Stat):
+    """Output directive for template expressions"""
+    
+    def __init__(self, expr_list: ExprList):
+        """
+        Initialize output directive
+        
+        Args:
+            expr_list: Expression list to evaluate
+        """
+        self._expr_list = expr_list
+    
+    def exec(self, env: Env, scope: Scope, writer) -> None:
+        """
+        Execute output directive
+        
+        Args:
+            env: Template environment
+            scope: Execution scope
+            writer: Output writer
+        """
+        if self._expr_list:
+            result = self._expr_list.eval(scope)
+            if result is not None:
+                if hasattr(writer, 'write'):
+                    writer.write(str(result))
+    
+    def __repr__(self) -> str:
+        return f"Output({self._expr_list})"

template/stat/ast/Stat.py

@@ -0,0 +1,79 @@
+#!/usr/bin/env python3.9
+# -*- coding: utf-8 -*-
+"""
+JFinal Stat - Abstract Syntax Tree Base Class
+"""
+
+from typing import Any
+from ..Scope import Scope
+from ...Env import Env
+
+class Stat:
+    """Base class for statement AST nodes"""
+    
+    def exec(self, env: Env, scope: Scope, writer) -> Any:
+        """
+        Execute the statement
+        
+        Args:
+            env: Template environment
+            scope: Execution scope
+            writer: Output writer
+            
+        Returns:
+            Execution result
+        """
+        raise NotImplementedError("Stat.exec() must be implemented by subclasses")
+    
+    def get_stat_list(self) -> 'StatList':
+        """Get as StatList if applicable"""
+        return None
+    
+    def __repr__(self) -> str:
+        return f"Stat({self.__class__.__name__})"
+
+
+class StatList(Stat):
+    """Statement list containing multiple statements"""
+    
+    def __init__(self):
+        """Initialize statement list"""
+        self._stats: list = []
+    
+    def add_stat(self, stat: Stat):
+        """
+        Add statement to list
+        
+        Args:
+            stat: Statement to add
+        """
+        if stat:
+            self._stats.append(stat)
+    
+    def exec(self, env: Env, scope: Scope, writer) -> Any:
+        """
+        Execute all statements in list
+        
+        Args:
+            env: Template environment
+            scope: Execution scope
+            writer: Output writer
+            
+        Returns:
+            Last statement result or None
+        """
+        result = None
+        for stat in self._stats:
+            result = stat.exec(env, scope, writer)
+        return result
+    
+    def get_stats(self) -> list:
+        """Get all statements"""
+        return self._stats.copy()
+    
+    def __len__(self) -> int:
+        """Get number of statements"""
+        return len(self._stats)
+    
+    def __repr__(self) -> str:
+        return f"StatList({len(self._stats)} statements)"

template/stat/ast/Text.py

@@ -0,0 +1,81 @@
+#!/usr/bin/env python3.9
+# -*- coding: utf-8 -*-
+"""
+JFinal Text - Text Statement
+"""
+
+from .Stat import Stat
+from ..Scope import Scope
+from ...Env import Env
+
+class Text(Stat):
+    """Text statement for template content"""
+    
+    def __init__(self, content: str):
+        """
+        Initialize text statement
+        
+        Args:
+            content: Text content
+        """
+        self._content = content
+    
+    def exec(self, env: Env, scope: Scope, writer) -> None:
+        """
+        Execute text statement
+        
+        Args:
+            env: Template environment
+            scope: Execution scope
+            writer: Output writer
+        """
+        if hasattr(writer, 'write'):
+            # Parse and evaluate template expressions
+            parsed_content = self._parse_expressions(env, scope)
+            writer.write(parsed_content)
+    
+    def _parse_expressions(self, env: Env, scope: Scope) -> str:
+        """
+        Parse and evaluate template expressions in content
+        
+        Args:
+            env: Template environment
+            scope: Execution scope
+            
+        Returns:
+            Parsed and evaluated content
+        """
+        import re
+        
+        def replace_expression(match):
+            """Replace expression with evaluated value"""
+            expr_str = match.group(1).strip()
+            
+            # Try to evaluate expression
+            try:
+                # First try variable access
+                if expr_str.isidentifier():
+                    value = scope.get(expr_str)
+                    return str(value) if value is not None else ''
+                
+                # Try arithmetic expression
+                try:
+                    # Simple arithmetic evaluation
+                    # This is a simplified implementation
+                    result = eval(expr_str, {})
+                    return str(result)
+                except:
+                    pass
+                
+                # Fallback to original expression
+                return match.group(0)
+                
+            except Exception as e:
+                return f"{match.group(0)} [Error: {e}]"
+        
+        # Replace all #(...) expressions
+        pattern = r'#\((.*?)\)'
+        return re.sub(pattern, replace_expression, self._content)
+    
+    def __repr__(self) -> str:
+        return f"Text('{self._content[:50]}...')"

template/stat/ast/__init__.py

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+# Export statement AST classes
+from .Stat import Stat, StatList
+from .Text import Text
+from .Define import Define
+from .Output import Output
+
+__all__ = [
+    'Stat', 'StatList',
+    'Text',
+    'Define',
+    'Output'
+]