40 lines
1.6 KiB
Rust
40 lines
1.6 KiB
Rust
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use super::{LoopBuilder, ValueId};
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use crate::ast::ASTNode;
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use crate::mir::utils::is_current_block_terminated;
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use crate::mir::ConstValue;
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impl<'a> LoopBuilder<'a> {
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pub(super) fn build_statement(&mut self, stmt: ASTNode) -> Result<ValueId, String> {
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// Preserve the originating span for loop-local control instructions (break/continue/phi).
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self.parent_builder.current_span = stmt.span();
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match stmt {
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// Ensure nested bare blocks inside loops are lowered with loop-aware semantics
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ASTNode::Program { statements, .. } => {
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let mut last = None;
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for s in statements.into_iter() {
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last = Some(self.build_statement(s)?);
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// フェーズS修正：統一終端検出ユーティリティ使用
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if is_current_block_terminated(self.parent_builder)? {
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break;
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}
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}
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Ok(last.unwrap_or_else(|| {
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let void_id = self.new_value();
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// Emit a void const to keep SSA consistent when block is empty
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let _ = self.emit_const(void_id, ConstValue::Void);
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void_id
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}))
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}
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ASTNode::If {
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condition,
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then_body,
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else_body,
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..
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} => self.lower_if_in_loop(*condition, then_body, else_body),
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ASTNode::Break { .. } => self.do_break(),
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ASTNode::Continue { .. } => self.do_continue(),
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other => self.parent_builder.build_expression(other),
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}
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}
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}
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