35 lines
1.3 KiB
Rust
35 lines
1.3 KiB
Rust
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use super::ValueId;
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use crate::ast::ASTNode;
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impl super::MirBuilder {
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// QMarkPropagate: result?.value (Result-like)
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pub(super) fn build_qmark_propagate_expression(&mut self, expression: ASTNode) -> Result<ValueId, String> {
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let res_val = self.build_expression_impl(expression)?;
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let ok_id = self.value_gen.next();
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self.emit_instruction(super::MirInstruction::BoxCall {
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dst: Some(ok_id),
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box_val: res_val,
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method: "isOk".to_string(),
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args: vec![],
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method_id: None,
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effects: super::EffectMask::PURE,
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})?;
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let then_block = self.block_gen.next();
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let else_block = self.block_gen.next();
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self.emit_instruction(super::MirInstruction::Branch { condition: ok_id, then_bb: then_block, else_bb: else_block })?;
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self.start_new_block(then_block)?;
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self.emit_instruction(super::MirInstruction::Return { value: Some(res_val) })?;
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self.start_new_block(else_block)?;
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let val_id = self.value_gen.next();
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self.emit_instruction(super::MirInstruction::BoxCall {
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dst: Some(val_id),
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box_val: res_val,
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method: "getValue".to_string(),
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args: vec![],
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method_id: None,
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effects: super::EffectMask::PURE,
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})?;
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Ok(val_id)
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}
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}
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