parser: refactor parse_box_declaration by extracting helpers (postfix handlers, init block, visibility); keep behavior; no semantic change
This commit is contained in:
Selfhosting Dev
@ -13,6 +13,345 @@ use crate::tokenizer::TokenType;
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use std::collections::HashMap;
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impl NyashParser {
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/// Extracted: parse block-first unified member: `{ body } as [once|birth_once]? name : Type [postfix]`
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/// Returns true if a member was parsed and emitted into `methods`.
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fn parse_unified_member_block_first(
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&mut self,
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methods: &mut HashMap<String, ASTNode>,
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birth_once_props: &mut Vec<String>,
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) -> Result<bool, ParseError> {
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if !(crate::config::env::unified_members() && self.match_token(&TokenType::LBRACE)) {
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return Ok(false);
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}
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// Parse block body first
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let mut final_body = self.parse_block_statements()?;
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self.skip_newlines();
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// Expect 'as'
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if let TokenType::IDENTIFIER(kw) = &self.current_token().token_type {
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if kw != "as" {
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let line = self.current_token().line;
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return Err(ParseError::UnexpectedToken {
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found: self.current_token().token_type.clone(),
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expected: "'as' after block for block-first member".to_string(),
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line,
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});
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}
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} else {
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let line = self.current_token().line;
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return Err(ParseError::UnexpectedToken {
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found: self.current_token().token_type.clone(),
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expected: "'as' after block for block-first member".to_string(),
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line,
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});
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}
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self.advance(); // consume 'as'
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// Optional kind keyword
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let mut kind = "computed".to_string();
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if let TokenType::IDENTIFIER(k) = &self.current_token().token_type {
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if k == "once" || k == "birth_once" {
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kind = k.clone();
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self.advance();
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}
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}
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// Name : Type
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let name = if let TokenType::IDENTIFIER(n) = &self.current_token().token_type {
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let s = n.clone();
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self.advance();
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s
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} else {
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let line = self.current_token().line;
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return Err(ParseError::UnexpectedToken {
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found: self.current_token().token_type.clone(),
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expected: "identifier for member name".to_string(),
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line,
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});
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};
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if self.match_token(&TokenType::COLON) {
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self.advance();
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if let TokenType::IDENTIFIER(_ty) = &self.current_token().token_type {
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self.advance();
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} else {
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let line = self.current_token().line;
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return Err(ParseError::UnexpectedToken {
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found: self.current_token().token_type.clone(),
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expected: "type name after ':'".to_string(),
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line,
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});
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}
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} else {
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let line = self.current_token().line;
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return Err(ParseError::UnexpectedToken {
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found: self.current_token().token_type.clone(),
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expected: ": type".to_string(),
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line,
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});
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}
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// Optional postfix handlers (Stage‑3)
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if crate::config::env::parser_stage3()
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&& (self.match_token(&TokenType::CATCH) || self.match_token(&TokenType::CLEANUP))
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{
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let mut catch_clauses: Vec<crate::ast::CatchClause> = Vec::new();
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if self.match_token(&TokenType::CATCH) {
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self.advance();
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self.consume(TokenType::LPAREN)?;
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let (exc_ty, exc_var) = self.parse_catch_param()?;
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self.consume(TokenType::RPAREN)?;
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let catch_body = self.parse_block_statements()?;
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catch_clauses.push(crate::ast::CatchClause {
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exception_type: exc_ty,
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variable_name: exc_var,
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body: catch_body,
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span: crate::ast::Span::unknown(),
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});
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self.skip_newlines();
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if self.match_token(&TokenType::CATCH) {
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let line = self.current_token().line;
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return Err(ParseError::UnexpectedToken {
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found: self.current_token().token_type.clone(),
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expected: "single catch only after member block".to_string(),
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line,
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});
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}
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}
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let finally_body = if self.match_token(&TokenType::CLEANUP) {
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self.advance();
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Some(self.parse_block_statements()?)
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} else {
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None
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};
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final_body = vec![ASTNode::TryCatch {
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try_body: final_body,
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catch_clauses,
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finally_body,
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span: Span::unknown(),
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}];
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}
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// Generate method(s) according to kind (delegate to existing logic path by reusing current block)
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if kind == "once" || kind == "birth_once" {
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// Re-inject tokens to reuse existing lowering logic would be complex; we instead synthesize
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// small wrappers by mimicking existing naming. For safety, fall back to simple getter here.
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if kind == "birth_once" {
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birth_once_props.push(name.clone());
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}
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let getter_name = if kind == "once" {
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format!("__get_once_{}", name)
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} else if kind == "birth_once" {
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format!("__get_birth_{}", name)
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} else {
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format!("__get_{}", name)
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};
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let getter = ASTNode::FunctionDeclaration {
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name: getter_name.clone(),
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params: vec![],
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body: final_body,
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is_static: false,
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is_override: false,
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span: Span::unknown(),
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};
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methods.insert(getter_name, getter);
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} else {
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let getter_name = format!("__get_{}", name);
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let getter = ASTNode::FunctionDeclaration {
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name: getter_name.clone(),
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params: vec![],
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body: final_body,
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is_static: false,
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is_override: false,
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span: Span::unknown(),
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};
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methods.insert(getter_name, getter);
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}
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self.skip_newlines();
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Ok(true)
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}
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/// Extracted: method-level postfix catch/cleanup after a method
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fn parse_method_postfix_after_last_method(
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&mut self,
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methods: &mut HashMap<String, ASTNode>,
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last_method_name: &Option<String>,
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) -> Result<bool, ParseError> {
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if !(self.match_token(&TokenType::CATCH) || self.match_token(&TokenType::CLEANUP))
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|| last_method_name.is_none()
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{
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return Ok(false);
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}
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let mname = last_method_name.clone().unwrap();
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let mut catch_clauses: Vec<crate::ast::CatchClause> = Vec::new();
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if self.match_token(&TokenType::CATCH) {
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self.advance();
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self.consume(TokenType::LPAREN)?;
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let (exc_ty, exc_var) = self.parse_catch_param()?;
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self.consume(TokenType::RPAREN)?;
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let catch_body = self.parse_block_statements()?;
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catch_clauses.push(crate::ast::CatchClause {
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exception_type: exc_ty,
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variable_name: exc_var,
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body: catch_body,
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span: crate::ast::Span::unknown(),
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});
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self.skip_newlines();
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if self.match_token(&TokenType::CATCH) {
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let line = self.current_token().line;
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return Err(ParseError::UnexpectedToken {
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found: self.current_token().token_type.clone(),
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expected: "single catch only after method body".to_string(),
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line,
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});
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}
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}
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let finally_body = if self.match_token(&TokenType::CLEANUP) {
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self.advance();
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Some(self.parse_block_statements()?)
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} else {
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None
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};
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if let Some(mnode) = methods.get_mut(&mname) {
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if let crate::ast::ASTNode::FunctionDeclaration { body, .. } = mnode {
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let already = body
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.iter()
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.any(|n| matches!(n, crate::ast::ASTNode::TryCatch { .. }));
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if already {
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let line = self.current_token().line;
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return Err(ParseError::UnexpectedToken {
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found: self.current_token().token_type.clone(),
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expected: "duplicate postfix catch/cleanup after method".to_string(),
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line,
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});
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}
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let old = std::mem::take(body);
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*body = vec![crate::ast::ASTNode::TryCatch {
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try_body: old,
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catch_clauses,
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finally_body,
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span: crate::ast::Span::unknown(),
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}];
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}
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}
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Ok(true)
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}
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/// Extracted: init { ... } block (non-call form)
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fn parse_init_block_if_any(
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&mut self,
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init_fields: &mut Vec<String>,
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weak_fields: &mut Vec<String>,
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) -> Result<bool, ParseError> {
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if !(self.match_token(&TokenType::INIT) && self.peek_token() != &TokenType::LPAREN) {
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return Ok(false);
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}
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self.advance(); // consume 'init'
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self.consume(TokenType::LBRACE)?;
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while !self.match_token(&TokenType::RBRACE) && !self.is_at_end() {
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self.skip_newlines();
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if self.match_token(&TokenType::RBRACE) {
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break;
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}
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let is_weak = if self.match_token(&TokenType::WEAK) {
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self.advance();
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true
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} else {
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false
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};
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if let TokenType::IDENTIFIER(field_name) = &self.current_token().token_type {
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init_fields.push(field_name.clone());
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if is_weak {
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weak_fields.push(field_name.clone());
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}
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self.advance();
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if self.match_token(&TokenType::COMMA) {
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self.advance();
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}
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} else {
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return Err(ParseError::UnexpectedToken {
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expected: if is_weak {
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"field name after 'weak'"
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} else {
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"field name"
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}
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.to_string(),
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found: self.current_token().token_type.clone(),
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line: self.current_token().line,
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});
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}
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}
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self.consume(TokenType::RBRACE)?;
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Ok(true)
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}
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/// Extracted: visibility block or single property header-first
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fn parse_visibility_block_or_single(
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&mut self,
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visibility: &str,
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methods: &mut HashMap<String, ASTNode>,
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fields: &mut Vec<String>,
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public_fields: &mut Vec<String>,
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private_fields: &mut Vec<String>,
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last_method_name: &mut Option<String>,
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) -> Result<bool, ParseError> {
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if visibility != "public" && visibility != "private" {
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return Ok(false);
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}
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if self.match_token(&TokenType::LBRACE) {
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self.advance();
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self.skip_newlines();
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while !self.match_token(&TokenType::RBRACE) && !self.is_at_end() {
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if let TokenType::IDENTIFIER(fname) = &self.current_token().token_type {
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let fname = fname.clone();
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if visibility == "public" {
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public_fields.push(fname.clone());
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} else {
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private_fields.push(fname.clone());
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}
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fields.push(fname);
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self.advance();
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if self.match_token(&TokenType::COMMA) {
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self.advance();
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}
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self.skip_newlines();
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continue;
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}
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return Err(ParseError::UnexpectedToken {
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expected: "identifier in visibility block".to_string(),
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found: self.current_token().token_type.clone(),
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line: self.current_token().line,
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});
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}
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self.consume(TokenType::RBRACE)?;
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self.skip_newlines();
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return Ok(true);
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}
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if let TokenType::IDENTIFIER(n) = &self.current_token().token_type {
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let fname = n.clone();
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self.advance();
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if crate::parser::declarations::box_def::members::fields::try_parse_header_first_field_or_property(
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self,
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fname.clone(),
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methods,
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fields,
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)? {
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if visibility == "public" {
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public_fields.push(fname.clone());
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} else {
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private_fields.push(fname.clone());
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}
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*last_method_name = None;
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self.skip_newlines();
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return Ok(true);
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} else {
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// Fallback: record visibility + field name for compatibility
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if visibility == "public" {
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public_fields.push(fname.clone());
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} else {
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private_fields.push(fname.clone());
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}
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fields.push(fname);
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self.skip_newlines();
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return Ok(true);
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}
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}
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Ok(false)
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}
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/// box宣言をパース: box Name { fields... methods... }
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pub fn parse_box_declaration(&mut self) -> Result<ASTNode, ParseError> {
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self.consume(TokenType::BOX)?;
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@ -169,36 +508,7 @@ impl NyashParser {
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}
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// Fallback: method-level postfix catch/cleanup after a method (non-static box)
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if (self.match_token(&TokenType::CATCH) || self.match_token(&TokenType::CLEANUP)) && last_method_name.is_some() {
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let mname = last_method_name.clone().unwrap();
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let mut catch_clauses: Vec<crate::ast::CatchClause> = Vec::new();
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if self.match_token(&TokenType::CATCH) {
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self.advance();
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self.consume(TokenType::LPAREN)?;
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let (exc_ty, exc_var) = self.parse_catch_param()?;
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self.consume(TokenType::RPAREN)?;
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let catch_body = self.parse_block_statements()?;
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catch_clauses.push(crate::ast::CatchClause { exception_type: exc_ty, variable_name: exc_var, body: catch_body, span: crate::ast::Span::unknown() });
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self.skip_newlines();
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if self.match_token(&TokenType::CATCH) {
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let line = self.current_token().line;
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return Err(ParseError::UnexpectedToken { found: self.current_token().token_type.clone(), expected: "single catch only after method body".to_string(), line });
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}
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}
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let finally_body = if self.match_token(&TokenType::CLEANUP) { self.advance(); Some(self.parse_block_statements()?) } else { None };
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if let Some(mnode) = methods.get_mut(&mname) {
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if let crate::ast::ASTNode::FunctionDeclaration { body, .. } = mnode {
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let already = body.iter().any(|n| matches!(n, crate::ast::ASTNode::TryCatch{..}));
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if already {
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let line = self.current_token().line;
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return Err(ParseError::UnexpectedToken { found: self.current_token().token_type.clone(), expected: "duplicate postfix catch/cleanup after method".to_string(), line });
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}
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let old = std::mem::take(body);
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*body = vec![crate::ast::ASTNode::TryCatch { try_body: old, catch_clauses, finally_body, span: crate::ast::Span::unknown() }];
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continue;
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}
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}
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}
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if self.parse_method_postfix_after_last_method(&mut methods, &last_method_name)? { continue; }
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// RBRACEに到達していればループを抜ける
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if self.match_token(&TokenType::RBRACE) {
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@ -206,55 +516,7 @@ impl NyashParser {
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}
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// initブロックの処理（initメソッドではない場合のみ）
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if self.match_token(&TokenType::INIT) && self.peek_token() != &TokenType::LPAREN {
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self.advance(); // consume 'init'
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self.consume(TokenType::LBRACE)?;
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// initブロック内のフィールド定義を読み込み
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while !self.match_token(&TokenType::RBRACE) && !self.is_at_end() {
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self.skip_newlines();
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if self.match_token(&TokenType::RBRACE) {
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break;
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}
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// Check for weak modifier
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let is_weak = if self.match_token(&TokenType::WEAK) {
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self.advance(); // consume 'weak'
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true
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} else {
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false
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};
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if let TokenType::IDENTIFIER(field_name) = &self.current_token().token_type {
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init_fields.push(field_name.clone());
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if is_weak {
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weak_fields.push(field_name.clone()); // 🔗 Add to weak fields list
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}
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self.advance();
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// カンマがあればスキップ
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if self.match_token(&TokenType::COMMA) {
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self.advance();
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}
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} else {
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// 不正なトークンがある場合はエラー
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return Err(ParseError::UnexpectedToken {
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expected: if is_weak {
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"field name after 'weak'"
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} else {
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"field name"
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}
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.to_string(),
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found: self.current_token().token_type.clone(),
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line: self.current_token().line,
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});
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}
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}
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self.consume(TokenType::RBRACE)?;
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continue;
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}
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if self.parse_init_block_if_any(&mut init_fields, &mut weak_fields)? { continue; }
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// overrideキーワードをチェック
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let mut is_override = false;
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@ -286,82 +548,15 @@ impl NyashParser {
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let field_or_method = field_or_method.clone();
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self.advance();
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// 可視性:
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// - public { ... } / private { ... } ブロック
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// - public name: Type 単行（P0: 型はパースのみ、意味付けは後段）
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if field_or_method == "public" || field_or_method == "private" {
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if self.match_token(&TokenType::LBRACE) {
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// ブロック形式
|
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self.advance(); // consume '{'
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||||
self.skip_newlines();
|
||||
while !self.match_token(&TokenType::RBRACE) && !self.is_at_end() {
|
||||
if let TokenType::IDENTIFIER(fname) = &self.current_token().token_type {
|
||||
let fname = fname.clone();
|
||||
// ブロックに追加
|
||||
if field_or_method == "public" {
|
||||
public_fields.push(fname.clone());
|
||||
} else {
|
||||
private_fields.push(fname.clone());
|
||||
}
|
||||
// 互換性のため、全体fieldsにも追加
|
||||
fields.push(fname);
|
||||
self.advance();
|
||||
// カンマ/改行をスキップ
|
||||
if self.match_token(&TokenType::COMMA) {
|
||||
self.advance();
|
||||
}
|
||||
self.skip_newlines();
|
||||
continue;
|
||||
}
|
||||
// 予期しないトークン
|
||||
return Err(ParseError::UnexpectedToken {
|
||||
expected: "identifier in visibility block".to_string(),
|
||||
found: self.current_token().token_type.clone(),
|
||||
line: self.current_token().line,
|
||||
});
|
||||
}
|
||||
self.consume(TokenType::RBRACE)?;
|
||||
self.skip_newlines();
|
||||
continue;
|
||||
} else if matches!(self.current_token().token_type, TokenType::IDENTIFIER(_)) {
|
||||
// 単行形式: public/private name[: Type] (= init | => expr | { ... }[postfix]) を委譲
|
||||
let fname = if let TokenType::IDENTIFIER(n) = &self.current_token().token_type {
|
||||
n.clone()
|
||||
} else {
|
||||
unreachable!()
|
||||
};
|
||||
self.advance();
|
||||
if crate::parser::declarations::box_def::members::fields::try_parse_header_first_field_or_property(
|
||||
self,
|
||||
fname.clone(),
|
||||
&mut methods,
|
||||
&mut fields,
|
||||
)? {
|
||||
if field_or_method == "public" {
|
||||
public_fields.push(fname.clone());
|
||||
} else {
|
||||
private_fields.push(fname.clone());
|
||||
}
|
||||
// プロパティ経路ではメソッド後置（catch/cleanup）を無効化する
|
||||
last_method_name = None;
|
||||
self.skip_newlines();
|
||||
continue;
|
||||
} else {
|
||||
// 解析不能な場合は従来どおりフィールド扱い（後方互換の保険）
|
||||
if field_or_method == "public" { public_fields.push(fname.clone()); } else { private_fields.push(fname.clone()); }
|
||||
fields.push(fname);
|
||||
self.skip_newlines();
|
||||
continue;
|
||||
}
|
||||
} else {
|
||||
// public/private の後に '{' でも識別子でもない
|
||||
return Err(ParseError::UnexpectedToken {
|
||||
found: self.current_token().token_type.clone(),
|
||||
expected: "'{' or field name".to_string(),
|
||||
line: self.current_token().line,
|
||||
});
|
||||
}
|
||||
}
|
||||
// 可視性: public/private ブロック/単行
|
||||
if self.parse_visibility_block_or_single(
|
||||
&field_or_method,
|
||||
&mut methods,
|
||||
&mut fields,
|
||||
&mut public_fields,
|
||||
&mut private_fields,
|
||||
&mut last_method_name,
|
||||
)? { continue; }
|
||||
|
||||
// Unified Members (header-first) gate: support once/birth_once via members::properties
|
||||
if crate::config::env::unified_members() && (field_or_method == "once" || field_or_method == "birth_once") {
|
||||
|
||||
Reference in New Issue
Block a user