Finish conversion of AST Reducer
This commit is contained in:
parent
25f51a314d
commit
a85d3c46bd
@ -120,58 +120,46 @@ impl<'a> Reducer<'a> {
|
||||
fn ast(&mut self, input: &AST) -> ReducedAST {
|
||||
let mut output = vec![];
|
||||
for statement in input.0.iter() {
|
||||
output.push(statement.reduce(self.symbol_table));
|
||||
output.push(self.statement(statement));
|
||||
}
|
||||
ReducedAST(output)
|
||||
}
|
||||
|
||||
/*
|
||||
fn meta_statement(&mut self, stmt: &Meta<Statement>) -> Stmt {
|
||||
|
||||
}
|
||||
*/
|
||||
}
|
||||
|
||||
impl Meta<Statement> {
|
||||
fn reduce(&self, symbol_table: &SymbolTable) -> Stmt {
|
||||
fn statement(&mut self, stmt: &Meta<Statement>) -> Stmt {
|
||||
use crate::ast::Statement::*;
|
||||
match self.node() {
|
||||
ExpressionStatement(expr) => Stmt::Expr(expr.reduce(symbol_table)),
|
||||
Declaration(decl) => decl.reduce(symbol_table),
|
||||
match stmt.node() {
|
||||
ExpressionStatement(expr) => Stmt::Expr(self.expression(expr)),
|
||||
Declaration(decl) => self.declaration(decl),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
fn reduce_block(block: &Block, symbol_table: &SymbolTable) -> Vec<Stmt> {
|
||||
block.iter().map(|stmt| stmt.reduce(symbol_table)).collect()
|
||||
}
|
||||
fn block(&mut self, block: &Block) -> Vec<Stmt> {
|
||||
block.iter().map(|stmt| self.statement(stmt)).collect()
|
||||
}
|
||||
|
||||
impl InvocationArgument {
|
||||
fn reduce(&self, symbol_table: &SymbolTable) -> Expr {
|
||||
fn invocation_argument(&mut self, invoc: &InvocationArgument) -> Expr {
|
||||
use crate::ast::InvocationArgument::*;
|
||||
match self {
|
||||
Positional(ex) => ex.reduce(symbol_table),
|
||||
match invoc {
|
||||
Positional(ex) => self.expression(ex),
|
||||
Keyword { .. } => Expr::UnimplementedSigilValue,
|
||||
Ignored => Expr::UnimplementedSigilValue,
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
impl Meta<Expression> {
|
||||
fn reduce(&self, symbol_table: &SymbolTable) -> Expr {
|
||||
fn expression(&mut self, expr: &Meta<Expression>) -> Expr {
|
||||
use crate::ast::ExpressionKind::*;
|
||||
let ref node = self.node();
|
||||
let symbol_table = self.symbol_table;
|
||||
let ref node = expr.node();
|
||||
let ref input = node.kind;
|
||||
match input {
|
||||
NatLiteral(n) => Expr::Lit(Lit::Nat(*n)),
|
||||
FloatLiteral(f) => Expr::Lit(Lit::Float(*f)),
|
||||
StringLiteral(s) => Expr::Lit(Lit::StringLit(s.clone())),
|
||||
BoolLiteral(b) => Expr::Lit(Lit::Bool(*b)),
|
||||
BinExp(binop, lhs, rhs) => binop.reduce(symbol_table, lhs, rhs),
|
||||
PrefixExp(op, arg) => op.reduce(symbol_table, arg),
|
||||
BinExp(binop, lhs, rhs) => self.binop(binop, lhs, rhs),
|
||||
PrefixExp(op, arg) => self.prefix(op, arg),
|
||||
Value(qualified_name) => {
|
||||
let ref sym_name = match self.fqsn {
|
||||
let ref sym_name = match expr.fqsn {
|
||||
Some(ref fqsn) => fqsn,
|
||||
None => return Expr::ReductionError(format!("FQSN lookup for Value {:?} failed", qualified_name)),
|
||||
};
|
||||
@ -188,118 +176,175 @@ impl Meta<Expression> {
|
||||
_ => Expr::Sym(name.clone()),
|
||||
}
|
||||
},
|
||||
Call { f, arguments } => reduce_call_expression(f, arguments, symbol_table),
|
||||
TupleLiteral(exprs) => Expr::Tuple(exprs.iter().map(|e| e.reduce(symbol_table)).collect()),
|
||||
IfExpression { discriminator, body } => reduce_if_expression(discriminator, body, symbol_table),
|
||||
Lambda { params, body, .. } => reduce_lambda(params, body, symbol_table),
|
||||
NamedStruct { name, fields } => reduce_named_struct(self.fqsn.as_ref(), name.node(), fields, symbol_table),
|
||||
Call { f, arguments } => self.reduce_call_expression(f, arguments),
|
||||
TupleLiteral(exprs) => Expr::Tuple(exprs.iter().map(|e| self.expression(e)).collect()),
|
||||
IfExpression { discriminator, body } => self.reduce_if_expression(discriminator, body),
|
||||
Lambda { params, body, .. } => self.reduce_lambda(params, body),
|
||||
NamedStruct { name, fields } => self.reduce_named_struct(expr.fqsn.as_ref(), name.node(), fields),
|
||||
Index { .. } => Expr::UnimplementedSigilValue,
|
||||
WhileExpression { .. } => Expr::UnimplementedSigilValue,
|
||||
ForExpression { .. } => Expr::UnimplementedSigilValue,
|
||||
ListLiteral { .. } => Expr::UnimplementedSigilValue,
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
fn reduce_lambda(params: &Vec<FormalParam>, body: &Block, symbol_table: &SymbolTable) -> Expr {
|
||||
Expr::Func(Func::UserDefined {
|
||||
name: None,
|
||||
params: params.iter().map(|param| param.name.clone()).collect(),
|
||||
body: reduce_block(body, symbol_table),
|
||||
})
|
||||
}
|
||||
|
||||
fn reduce_named_struct(fqsn: Option<&FullyQualifiedSymbolName>, _name: &QualifiedName, fields: &Vec<(Rc<String>, Meta<Expression>)>, symbol_table: &SymbolTable) -> Expr {
|
||||
let sym_name = match fqsn {
|
||||
Some(fqsn) => fqsn,
|
||||
None => return Expr::ReductionError(format!("FQSN lookup for value B failed")),
|
||||
};
|
||||
let FullyQualifiedSymbolName(ref v) = sym_name;
|
||||
let ref name = v.last().unwrap().name;
|
||||
let (type_name, index, members_from_table) = match symbol_table.lookup_by_fqsn(&sym_name) {
|
||||
Some(Symbol { spec: SymbolSpec::RecordConstructor { members, type_name, index }, .. }) => (type_name.clone(), index, members),
|
||||
_ => return Expr::ReductionError("Not a record constructor".to_string()),
|
||||
};
|
||||
let arity = members_from_table.len();
|
||||
|
||||
let mut args: Vec<(Rc<String>, Expr)> = fields.iter()
|
||||
.map(|(name, expr)| (name.clone(), expr.reduce(symbol_table)))
|
||||
.collect();
|
||||
|
||||
args.as_mut_slice()
|
||||
.sort_unstable_by(|(name1, _), (name2, _)| name1.cmp(name2)); //arbitrary - sorting by alphabetical order
|
||||
|
||||
let args = args.into_iter().map(|(_, expr)| expr).collect();
|
||||
|
||||
//TODO make sure this sorting actually works
|
||||
let f = box Expr::Constructor { type_name, name: name.clone(), tag: *index, arity, };
|
||||
Expr::Call { f, args }
|
||||
}
|
||||
|
||||
fn reduce_call_expression(func: &Meta<Expression>, arguments: &Vec<InvocationArgument>, symbol_table: &SymbolTable) -> Expr {
|
||||
Expr::Call {
|
||||
f: Box::new(func.reduce(symbol_table)),
|
||||
args: arguments.iter().map(|arg| arg.reduce(symbol_table)).collect(),
|
||||
fn reduce_lambda(&mut self, params: &Vec<FormalParam>, body: &Block) -> Expr {
|
||||
Expr::Func(Func::UserDefined {
|
||||
name: None,
|
||||
params: params.iter().map(|param| param.name.clone()).collect(),
|
||||
body: self.block(body),
|
||||
})
|
||||
}
|
||||
}
|
||||
|
||||
fn reduce_if_expression(discriminator: &Discriminator, body: &IfExpressionBody, symbol_table: &SymbolTable) -> Expr {
|
||||
let cond = Box::new(match *discriminator {
|
||||
Discriminator::Simple(ref expr) => expr.reduce(symbol_table),
|
||||
Discriminator::BinOp(ref _expr, ref _binop) => panic!("Can't yet handle binop discriminators")
|
||||
});
|
||||
match *body {
|
||||
IfExpressionBody::SimpleConditional(ref then_clause, ref else_clause) => {
|
||||
let then_clause = reduce_block(then_clause, symbol_table);
|
||||
let else_clause = match else_clause {
|
||||
None => vec![],
|
||||
Some(stmts) => reduce_block(stmts, symbol_table),
|
||||
};
|
||||
Expr::Conditional { cond, then_clause, else_clause }
|
||||
},
|
||||
IfExpressionBody::SimplePatternMatch(ref pat, ref then_clause, ref else_clause) => {
|
||||
let then_clause = reduce_block(then_clause, symbol_table);
|
||||
let else_clause = match else_clause {
|
||||
None => vec![],
|
||||
Some(stmts) => reduce_block(stmts, symbol_table),
|
||||
};
|
||||
fn reduce_named_struct(&mut self, fqsn: Option<&FullyQualifiedSymbolName>, _name: &QualifiedName, fields: &Vec<(Rc<String>, Meta<Expression>)>) -> Expr {
|
||||
let symbol_table = self.symbol_table;
|
||||
let sym_name = match fqsn {
|
||||
Some(fqsn) => fqsn,
|
||||
None => return Expr::ReductionError(format!("FQSN lookup for value B failed")),
|
||||
};
|
||||
let FullyQualifiedSymbolName(ref v) = sym_name;
|
||||
let ref name = v.last().unwrap().name;
|
||||
let (type_name, index, members_from_table) = match symbol_table.lookup_by_fqsn(&sym_name) {
|
||||
Some(Symbol { spec: SymbolSpec::RecordConstructor { members, type_name, index }, .. }) => (type_name.clone(), index, members),
|
||||
_ => return Expr::ReductionError("Not a record constructor".to_string()),
|
||||
};
|
||||
let arity = members_from_table.len();
|
||||
|
||||
let alternatives = vec![
|
||||
pat.to_alternative(then_clause, symbol_table),
|
||||
Alternative {
|
||||
matchable: Subpattern {
|
||||
tag: None,
|
||||
subpatterns: vec![],
|
||||
bound_vars: vec![],
|
||||
guard: None,
|
||||
let mut args: Vec<(Rc<String>, Expr)> = fields.iter()
|
||||
.map(|(name, expr)| (name.clone(), self.expression(expr)))
|
||||
.collect();
|
||||
|
||||
args.as_mut_slice()
|
||||
.sort_unstable_by(|(name1, _), (name2, _)| name1.cmp(name2)); //arbitrary - sorting by alphabetical order
|
||||
|
||||
let args = args.into_iter().map(|(_, expr)| expr).collect();
|
||||
|
||||
//TODO make sure this sorting actually works
|
||||
let f = box Expr::Constructor { type_name, name: name.clone(), tag: *index, arity, };
|
||||
Expr::Call { f, args }
|
||||
}
|
||||
|
||||
fn reduce_call_expression(&mut self, func: &Meta<Expression>, arguments: &Vec<InvocationArgument>) -> Expr {
|
||||
Expr::Call {
|
||||
f: Box::new(self.expression(func)),
|
||||
args: arguments.iter().map(|arg| self.invocation_argument(arg)).collect(),
|
||||
}
|
||||
}
|
||||
|
||||
fn reduce_if_expression(&mut self, discriminator: &Discriminator, body: &IfExpressionBody) -> Expr {
|
||||
let symbol_table = self.symbol_table;
|
||||
let cond = Box::new(match *discriminator {
|
||||
Discriminator::Simple(ref expr) => self.expression(expr),
|
||||
Discriminator::BinOp(ref _expr, ref _binop) => panic!("Can't yet handle binop discriminators")
|
||||
});
|
||||
match *body {
|
||||
IfExpressionBody::SimpleConditional(ref then_clause, ref else_clause) => {
|
||||
let then_clause = self.block(then_clause);
|
||||
let else_clause = match else_clause {
|
||||
None => vec![],
|
||||
Some(stmts) => self.block(stmts),
|
||||
};
|
||||
Expr::Conditional { cond, then_clause, else_clause }
|
||||
},
|
||||
IfExpressionBody::SimplePatternMatch(ref pat, ref then_clause, ref else_clause) => {
|
||||
let then_clause = self.block(then_clause);
|
||||
let else_clause = match else_clause {
|
||||
None => vec![],
|
||||
Some(stmts) => self.block(stmts),
|
||||
};
|
||||
|
||||
let alternatives = vec![
|
||||
pat.to_alternative(then_clause, symbol_table),
|
||||
Alternative {
|
||||
matchable: Subpattern {
|
||||
tag: None,
|
||||
subpatterns: vec![],
|
||||
bound_vars: vec![],
|
||||
guard: None,
|
||||
},
|
||||
item: else_clause
|
||||
},
|
||||
item: else_clause
|
||||
},
|
||||
];
|
||||
];
|
||||
|
||||
Expr::CaseMatch {
|
||||
cond,
|
||||
alternatives,
|
||||
}
|
||||
},
|
||||
IfExpressionBody::GuardList(ref guard_arms) => {
|
||||
let mut alternatives = vec![];
|
||||
for arm in guard_arms {
|
||||
match arm.guard {
|
||||
Guard::Pat(ref p) => {
|
||||
let item = reduce_block(&arm.body, symbol_table);
|
||||
let alt = p.to_alternative(item, symbol_table);
|
||||
alternatives.push(alt);
|
||||
},
|
||||
Guard::HalfExpr(HalfExpr { op: _, expr: _ }) => {
|
||||
return Expr::UnimplementedSigilValue
|
||||
Expr::CaseMatch {
|
||||
cond,
|
||||
alternatives,
|
||||
}
|
||||
},
|
||||
IfExpressionBody::GuardList(ref guard_arms) => {
|
||||
let mut alternatives = vec![];
|
||||
for arm in guard_arms {
|
||||
match arm.guard {
|
||||
Guard::Pat(ref p) => {
|
||||
let item = self.block(&arm.body);
|
||||
let alt = p.to_alternative(item, symbol_table);
|
||||
alternatives.push(alt);
|
||||
},
|
||||
Guard::HalfExpr(HalfExpr { op: _, expr: _ }) => {
|
||||
return Expr::UnimplementedSigilValue
|
||||
}
|
||||
}
|
||||
}
|
||||
Expr::CaseMatch { cond, alternatives }
|
||||
}
|
||||
Expr::CaseMatch { cond, alternatives }
|
||||
}
|
||||
}
|
||||
|
||||
fn binop(&mut self, binop: &BinOp, lhs: &Box<Meta<Expression>>, rhs: &Box<Meta<Expression>>) -> Expr {
|
||||
let operation = Builtin::from_str(binop.sigil()).ok();
|
||||
match operation {
|
||||
Some(Builtin::Assignment) => Expr::Assign {
|
||||
val: Box::new(self.expression(&*lhs)),
|
||||
expr: Box::new(self.expression(&*rhs)),
|
||||
},
|
||||
Some(op) => {
|
||||
let f = Box::new(Expr::Func(Func::BuiltIn(op)));
|
||||
Expr::Call { f, args: vec![self.expression(&*lhs), self.expression(&*rhs)] }
|
||||
},
|
||||
None => {
|
||||
//TODO handle a user-defined operation
|
||||
Expr::UnimplementedSigilValue
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
fn prefix(&mut self, prefix: &PrefixOp, arg: &Box<Meta<Expression>>) -> Expr {
|
||||
match prefix.builtin {
|
||||
Some(op) => {
|
||||
let f = Box::new(Expr::Func(Func::BuiltIn(op)));
|
||||
Expr::Call { f, args: vec![self.expression(arg)] }
|
||||
},
|
||||
None => { //TODO need this for custom prefix ops
|
||||
Expr::UnimplementedSigilValue
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
fn declaration(&mut self, declaration: &Declaration) -> Stmt {
|
||||
use self::Declaration::*;
|
||||
match declaration {
|
||||
Binding {name, constant, expr, .. } => Stmt::Binding { name: name.clone(), constant: *constant, expr: self.expression(expr) },
|
||||
FuncDecl(Signature { name, params, .. }, statements) => Stmt::PreBinding {
|
||||
name: name.clone(),
|
||||
func: Func::UserDefined {
|
||||
name: Some(name.clone()),
|
||||
params: params.iter().map(|param| param.name.clone()).collect(),
|
||||
body: self.block(&statements),
|
||||
}
|
||||
},
|
||||
TypeDecl { .. } => Stmt::Noop,
|
||||
TypeAlias(_, _) => Stmt::Noop,
|
||||
Interface { .. } => Stmt::Noop,
|
||||
Impl { .. } => Stmt::Expr(Expr::UnimplementedSigilValue),
|
||||
_ => Stmt::Expr(Expr::UnimplementedSigilValue)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
/* ig var pat
|
||||
* x is SomeBigOldEnum(_, x, Some(t))
|
||||
*/
|
||||
@ -465,60 +510,5 @@ impl PatternLiteral {
|
||||
},
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl Declaration {
|
||||
fn reduce(&self, symbol_table: &SymbolTable) -> Stmt {
|
||||
use self::Declaration::*;
|
||||
match self {
|
||||
Binding {name, constant, expr, .. } => Stmt::Binding { name: name.clone(), constant: *constant, expr: expr.reduce(symbol_table) },
|
||||
FuncDecl(Signature { name, params, .. }, statements) => Stmt::PreBinding {
|
||||
name: name.clone(),
|
||||
func: Func::UserDefined {
|
||||
name: Some(name.clone()),
|
||||
params: params.iter().map(|param| param.name.clone()).collect(),
|
||||
body: reduce_block(&statements, symbol_table),
|
||||
}
|
||||
},
|
||||
TypeDecl { .. } => Stmt::Noop,
|
||||
TypeAlias(_, _) => Stmt::Noop,
|
||||
Interface { .. } => Stmt::Noop,
|
||||
Impl { .. } => Stmt::Expr(Expr::UnimplementedSigilValue),
|
||||
_ => Stmt::Expr(Expr::UnimplementedSigilValue)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl BinOp {
|
||||
fn reduce(&self, symbol_table: &SymbolTable, lhs: &Box<Meta<Expression>>, rhs: &Box<Meta<Expression>>) -> Expr {
|
||||
let operation = Builtin::from_str(self.sigil()).ok();
|
||||
match operation {
|
||||
Some(Builtin::Assignment) => Expr::Assign {
|
||||
val: Box::new(lhs.reduce(symbol_table)),
|
||||
expr: Box::new(rhs.reduce(symbol_table)),
|
||||
},
|
||||
Some(op) => {
|
||||
let f = Box::new(Expr::Func(Func::BuiltIn(op)));
|
||||
Expr::Call { f, args: vec![lhs.reduce(symbol_table), rhs.reduce(symbol_table)]}
|
||||
},
|
||||
None => {
|
||||
//TODO handle a user-defined operation
|
||||
Expr::UnimplementedSigilValue
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl PrefixOp {
|
||||
fn reduce(&self, symbol_table: &SymbolTable, arg: &Box<Meta<Expression>>) -> Expr {
|
||||
match self.builtin {
|
||||
Some(op) => {
|
||||
let f = Box::new(Expr::Func(Func::BuiltIn(op)));
|
||||
Expr::Call { f, args: vec![arg.reduce(symbol_table)]}
|
||||
},
|
||||
None => { //TODO need this for custom prefix ops
|
||||
Expr::UnimplementedSigilValue
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
Loading…
Reference in New Issue
Block a user