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More rejiggering - tests still fail

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This commit is contained in:
greg 2018-11-19 00:21:50 -08:00
parent 71dacc94d6
commit 0246e510ca
1 changed files with 36 additions and 27 deletions
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63
schala-lang/language/src/ast_visitor.rs
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@ -7,30 +7,7 @@ pub fn dispatch<V: ASTVisitor>(visitor: &mut V, ast: &AST) {
for statement in ast.0.iter() {
match statement {
Statement::ExpressionStatement(e) => {
match e {
Expression(expr, maybe_anno) => {
match expr {
ExpressionType::NatLiteral(n) => visitor.nat_literal(n),
ExpressionType::FloatLiteral(f) => visitor.float_literal(f),
ExpressionType::StringLiteral(s) => visitor.string_literal(s),
ExpressionType::BoolLiteral(b) => visitor.bool_literal(b),
ExpressionType::BinExp(binop, lhs, rhs) => visitor.binop(binop, lhs, rhs),
ExpressionType::PrefixExp(prefix, expr) => visitor.prefixop(prefix, expr),
ExpressionType::TupleLiteral(v) => visitor.tuple_literal(v),
ExpressionType::Value(v) => visitor.value(v),
ExpressionType::NamedStruct { name, fields } => visitor.named_struct(name, fields),
ExpressionType::Call { f, arguments } => visitor.call(f, arguments),
ExpressionType::Index { indexee, indexers } => visitor.index(indexee, indexers),
ExpressionType::IfExpression { discriminator, body } => visitor.if_expression(discriminator, body),
ExpressionType::WhileExpression { condition, body } => visitor.while_expresssion(condition, body),
ExpressionType::ForExpression { enumerators, body } => visitor.for_expression(enumerators, body),
ExpressionType::Lambda { params, type_anno, body } => visitor.lambda_expression(params, type_anno, body),
ExpressionType::ListLiteral(items) => visitor.list_literal(items),
}
visitor.anno_expr(maybe_anno);
visitor.expr_kind(expr);
}
}
dispatch_expression(visitor, e);
visitor.expression(e);
},
Statement::Declaration(decl) => {
@ -51,6 +28,34 @@ pub fn dispatch<V: ASTVisitor>(visitor: &mut V, ast: &AST) {
visitor.ast(ast)
}
fn dispatch_expression<V: ASTVisitor>(visitor: &mut V, expression: &Expression) {
match expression {
Expression(expr, maybe_anno) => {
match expr {
ExpressionType::NatLiteral(n) => visitor.nat_literal(n),
ExpressionType::FloatLiteral(f) => visitor.float_literal(f),
ExpressionType::StringLiteral(s) => visitor.string_literal(s),
ExpressionType::BoolLiteral(b) => visitor.bool_literal(b),
ExpressionType::BinExp(binop, lhs, rhs) => visitor.binop(binop, lhs, rhs),
ExpressionType::PrefixExp(prefix, expr) => visitor.prefixop(prefix, expr),
ExpressionType::TupleLiteral(v) => visitor.tuple_literal(v),
ExpressionType::Value(v) => visitor.value(v),
ExpressionType::NamedStruct { name, fields } => visitor.named_struct(name, fields),
ExpressionType::Call { f, arguments } => visitor.call(f, arguments),
ExpressionType::Index { indexee, indexers } => visitor.index(indexee, indexers),
ExpressionType::IfExpression { discriminator, body } => visitor.if_expression(discriminator, body),
ExpressionType::WhileExpression { condition, body } => visitor.while_expresssion(condition, body),
ExpressionType::ForExpression { enumerators, body } => visitor.for_expression(enumerators, body),
ExpressionType::Lambda { params, type_anno, body } => visitor.lambda_expression(params, type_anno, body),
ExpressionType::ListLiteral(items) => visitor.list_literal(items),
}
visitor.anno_expr(maybe_anno);
visitor.expr_kind(expr);
}
}
}
pub trait ASTVisitor {
fn ast(&mut self, _ast: &AST) { }
fn statement(&mut self, _stmt: &Statement) { }
@ -111,8 +116,12 @@ impl ASTVisitor for SchalaPrinter {
fn expression(&mut self, _: &Expression) {
self.s.push_str("some_expr");
}
fn declaration(&mut self, _: &Declaration) {
self.s.push_str("some_decl");
fn binding(&mut self, name: &Rc<String>, constant: &bool, _expr: &Expression) {
self.s.push_str(&format!("let{} {} = {}",
if *constant { "" } else { " mut" },
name,
"some_expr"));
}
}
@ -136,7 +145,7 @@ mod visitor_tests {
let mut pp = SchalaPrinter::new();
dispatch(&mut pp, &ast);
let result = pp.done();
assert_eq!(result, r#"Pretty-printed AST
assert_eq!(result, r#"Schala source code:
let a = 1 + 2
let b = 2 + 44
foo()