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use crate::prelude::*;
impl Runtime {
pub fn exec_claim_stmt(&mut self, stmt: &ClaimStmt) -> Result<StmtResult, RuntimeError> {
match &stmt.fact {
Fact::ForallFactWithIff(_) => unreachable!("claim forall with iff is not supported"),
Fact::ForallFact(forall_fact) => {
self.verify_fact_well_defined(&stmt.fact, &VerifyState::new(0, false))
.map_err(|e| {
short_exec_error(
stmt.clone().into(),
"claim: fact is not well defined".to_string(),
Some(e),
vec![],
)
})?;
let body_exec_result = self.run_in_local_env(|rt| {
rt.define_params_with_type(
&forall_fact.params_def_with_type,
false,
ParamObjType::Forall,
)
.map_err(|define_params_error| {
exec_stmt_error_with_stmt_and_cause(
stmt.clone().into(),
define_params_error,
)
})?;
for dom_fact in forall_fact.dom_facts.iter() {
rt.verify_well_defined_and_store_and_infer_with_default_verify_state(dom_fact.clone())?;
}
let mut inside_results = vec![];
let proof_len = stmt.proof.len();
for (proof_index, proof_stmt) in stmt.proof.iter().enumerate() {
let result = rt.exec_stmt(proof_stmt)?;
if result.is_unknown() {
return Err(
UnknownRuntimeError(RuntimeErrorStruct::new(
Some(proof_stmt.clone()),
format!(
"claim failed: proof step {}/{} is unknown: `{}`\n{}",
proof_index + 1,
proof_len,
proof_stmt,
result.body_string()
),
proof_stmt.line_file(),
None,
vec![],
))
.into(),
);
}
inside_results.push(result);
}
let then_count = forall_fact.then_facts.len();
for (then_index, then_fact) in forall_fact.then_facts.iter().enumerate() {
let result = rt.verify_exist_or_and_chain_atomic_fact(
then_fact,
&VerifyState::new(0, false),
)?;
if result.is_unknown() {
return Err(
UnknownRuntimeError(RuntimeErrorStruct::new(
Some(Stmt::Fact(then_fact.clone().to_fact())),
format!(
"claim failed: cannot prove goal `{}`; then-clause {}/{} `{}` is unknown\n{}",
stmt.fact,
then_index + 1,
then_count,
then_fact,
result.body_string()
),
then_fact.line_file(),
None,
vec![],
))
.into(),
);
}
inside_results.push(result);
}
Ok(NonFactualStmtSuccess::new(
stmt.clone().into(),
InferResult::new(),
inside_results,
)
.into())
});
let non_err_after_body: StmtResult = match body_exec_result {
Ok(non_err_stmt_exec_result) => non_err_stmt_exec_result,
Err(runtime_error) => return Err(runtime_error),
};
if non_err_after_body.is_unknown() {
return Err(UnknownRuntimeError(RuntimeErrorStruct::new(
Some(stmt.clone().into()),
format!(
"claim failed: cannot prove `{}`\n{}",
stmt.fact,
non_err_after_body.body_string()
),
stmt.line_file.clone(),
None,
vec![],
))
.into());
}
let infer_result_after_store = self
.verify_well_defined_and_store_and_infer_with_default_verify_state(
stmt.fact.clone(),
)?;
Ok(non_err_after_body.with_infers(infer_result_after_store))
}
_ => {
self.verify_fact_well_defined(&stmt.fact, &VerifyState::new(0, false))
.map_err(|e| {
short_exec_error(
stmt.clone().into(),
"claim: fact is not well defined".to_string(),
Some(e),
vec![],
)
})?;
let body_exec_result = self.run_in_local_env(|rt| {
let mut inside_results: Vec<StmtResult> = Vec::new();
for proof_stmt in stmt.proof.iter() {
let proof_exec_result = rt.exec_stmt(proof_stmt)?;
inside_results.push(proof_exec_result);
}
rt.verify_fact_return_err_if_not_true(&stmt.fact, &VerifyState::new(0, false))?;
Ok(NonFactualStmtSuccess::new(
stmt.clone().into(),
InferResult::new(),
inside_results,
)
.into())
});
let non_err_after_body: StmtResult = match body_exec_result {
Ok(non_err_stmt_exec_result) => non_err_stmt_exec_result,
Err(runtime_error) => return Err(runtime_error),
};
let infer_result_after_store = self
.verify_well_defined_and_store_and_infer_with_default_verify_state(
stmt.fact.clone(),
)?;
Ok(non_err_after_body.with_infers(infer_result_after_store))
}
}
}
}