runner/env: centralize CLI/env getters; parser expr split (call/primary); verifier utils direct; optimizer: boxfield peephole; LLVM: branch cond normalize hook; add trace macro scaffolding; refactor common.rs verbose checks

src/parser/expr/term.rs

@@ -0,0 +1,27 @@
+use crate::parser::{NyashParser, ParseError};
+use crate::parser::common::ParserUtils;
+use crate::tokenizer::TokenType;
+use crate::ast::{ASTNode, BinaryOperator, Span};
+
+impl NyashParser {
+    pub(crate) fn expr_parse_term(&mut self) -> Result<ASTNode, ParseError> {
+        let mut expr = self.expr_parse_shift()?;
+        while self.match_token(&TokenType::PLUS) || self.match_token(&TokenType::MINUS) {
+            let operator = match &self.current_token().token_type {
+                TokenType::PLUS => BinaryOperator::Add,
+                TokenType::MINUS => BinaryOperator::Subtract,
+                _ => unreachable!(),
+            };
+            self.advance();
+            let right = self.expr_parse_shift()?;
+            if std::env::var("NYASH_GRAMMAR_DIFF").ok().as_deref() == Some("1") {
+                let name = match operator { BinaryOperator::Add=>"add", BinaryOperator::Subtract=>"sub", _=>"term" };
+                let ok = crate::grammar::engine::get().syntax_is_allowed_binop(name);
+                if !ok { eprintln!("[GRAMMAR-DIFF][Parser] binop '{}' not allowed by syntax rules", name); }
+            }
+            expr = ASTNode::BinaryOp { operator, left: Box::new(expr), right: Box::new(right), span: Span::unknown() };
+        }
+        Ok(expr)
+    }
+}
+