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constraint struct access

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This commit is contained in:
collin 2020-04-15 16:52:17 -07:00
parent 025d9ab45d
commit 3bc7118d71
5 changed files with 43 additions and 77 deletions
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9
simple.program
View File

@ -1,5 +1,10 @@
bool[2] a = [true, false]
struct Point {
field x
field y
}
p = a[0..2]
Point p = Point {x: 1, y: 0}
p.x = 2
return p

93
src/aleo_program/constraints.rs
View File

@ -437,10 +437,6 @@ impl ResolvedProgram {
if let Some(resolved_value) = self.resolved_variables.get_mut(&variable) {
match resolved_value {
ResolvedValue::StructDefinition(struct_definition) => {
// for (field, member) in struct_definition.fields.iter().zip(members.into_iter()) {
// self.enforce_expression(cs, member.expression);
// }
struct_definition
.fields
.clone()
@ -524,7 +520,27 @@ impl ResolvedProgram {
}
}
}
value => unimplemented!("Cannot access element of untyped array"),
value => unimplemented!("Cannot access element of untyped array {}", value),
}
}
fn enforce_struct_access_expression<F: Field + PrimeField, CS: ConstraintSystem<F>>(
&mut self,
cs: &mut CS,
struct_variable: Box<Expression>,
struct_member: Variable,
) -> ResolvedValue {
match self.enforce_expression(cs, *struct_variable) {
ResolvedValue::StructExpression(_name, members) => {
let matched_member = members
.into_iter()
.find(|member| member.variable == struct_member);
match matched_member {
Some(member) => self.enforce_expression(cs, member.expression),
None => unimplemented!("Cannot access struct member {}", struct_member.0),
}
}
value => unimplemented!("Cannot access element of untyped struct {}", value),
}
}
@ -566,7 +582,10 @@ impl ResolvedProgram {
}
Expression::ArrayAccess(array, index) => {
self.enforce_array_access_expression(cs, array, index)
} // _ => unimplemented!("expression not enforced yet")
}
Expression::StructMemberAccess(struct_variable, struct_member) => {
self.enforce_struct_access_expression(cs, struct_variable, struct_member)
}
}
}
@ -581,68 +600,6 @@ impl ResolvedProgram {
println!(" statement result: {} = {}", variable.0, result);
self.insert(variable, result);
}
// Expression::Boolean(boolean_expression) => {
// let res = self.enforce_boolean_expression(cs, boolean_expression);
// println!(" variable boolean result: {} = {}", variable.0, res);
// self.insert(variable, res);
// }
// Expression::FieldElement(field_expression) => {
// let res = self.enforce_field_expression(cs, field_expression);
// println!(" variable field result: {} = {}", variable.0, res);
// self.insert(variable, res);
// }
// Expression::Variable(unresolved_variable) => {
// if self.resolved_variables.contains_key(&unresolved_variable) {
// // Reassigning variable to another variable
// let already_assigned = self
// .resolved_variables
// .get_mut(&unresolved_variable)
// .unwrap()
// .clone();
// self.insert(variable, already_assigned);
// } else {
// // The type of the unassigned variable depends on what is passed in
// if std::env::args()
// .nth(1)
// .expect("variable declaration not passed in")
// .parse::<bool>()
// .is_ok()
// {
// let resolved_boolean = self.bool_from_variable(cs, unresolved_variable);
// println!(
// "variable boolean result: {} = {}",
// variable.0,
// resolved_boolean.get_value().unwrap()
// );
// self.insert(variable, ResolvedValue::Boolean(resolved_boolean));
// } else {
// let resolved_field_element =
// self.u32_from_variable(cs, unresolved_variable);
// println!(
// " variable field result: {} = {}",
// variable.0,
// resolved_field_element.value.unwrap()
// );
// self.insert(
// variable,
// ResolvedValue::FieldElement(resolved_field_element),
// );
// }
// }
// }
// Expression::Struct(struct_name, members) => {
// let resolved_struct = self.enforce_struct_expression(cs, struct_name, members);
// println!(
// " inline struct declared: {} = {}",
// variable.0,
// resolved_struct
// );
// self.insert(
// variable,
// resolved_struct
// );
// }
// },
Statement::Return(statements) => {
statements
.into_iter()

2
src/aleo_program/types.rs
View File

@ -94,7 +94,7 @@ pub enum Expression {
Variable(Variable),
ArrayAccess(Box<Expression>, FieldRangeOrExpression),
Struct(Variable, Vec<StructMember>),
// StructMemberAccess(Variable, Variable)// (struct name, struct member name)
StructMemberAccess(Box<Expression>, Variable), // (struct name, struct member name)
}
/// Program statement that defines some action (or expression) to be carried out.

5
src/aleo_program/types_display.rs
View File

@ -142,7 +142,10 @@ impl<'ast> fmt::Display for Expression {
write!(f, "}}")
}
Expression::ArrayAccess(ref array, ref index) => write!(f, "{}[{}]", array, index),
_ => unimplemented!("can't display expression yet"),
Expression::StructMemberAccess(ref struct_variable, ref member) => {
write!(f, "{}.{}", struct_variable, member)
}
// _ => unimplemented!("can't display expression yet"),
}
}
}

11
src/aleo_program/types_from.rs
View File

@ -327,9 +327,10 @@ impl<'ast> From<ast::PostfixExpression<'ast>> for types::Expression {
unimplemented!("only function names are callable, found \"{}\"", expression)
}
},
ast::Access::Member(struct_member) => {
unimplemented!("struct calls not implemented")
}
ast::Access::Member(struct_member) => types::Expression::StructMemberAccess(
Box::new(acc),
types::Variable::from(struct_member.variable),
),
ast::Access::Select(array) => types::Expression::ArrayAccess(
Box::new(acc),
types::FieldRangeOrExpression::from(array.expression),
@ -697,12 +698,12 @@ impl<'ast> From<ast::File<'ast>> for types::Program {
let mut functions = HashMap::new();
file.structs.into_iter().for_each(|struct_def| {
println!("{:#?}", struct_def);
// println!("{:#?}", struct_def);
let struct_definition = types::Struct::from(struct_def);
structs.insert(struct_definition.variable.clone(), struct_definition);
});
file.functions.into_iter().for_each(|function_def| {
println!("{:#?}", function_def);
// println!("{:#?}", function_def);
let function_definition = types::Function::from(function_def);
functions.insert(function_definition.variable.clone(), function_definition);
});