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use super::*;
pub(crate) fn emit_enclosing_function_lparen_for_index(
vast_nodes: &str,
idx: Expr,
out_name: &str,
prefix: &str,
) -> Vec<Node> {
let base = format!("{prefix}_base");
let parent = format!("{prefix}_parent");
let parent_walk = format!("{prefix}_parent_walk");
let parent_base = format!("{prefix}_parent_base");
let parent_kind = format!("{prefix}_parent_kind");
let parent_prev_kind = format!("{prefix}_parent_prev_kind");
let scope = format!("{prefix}_scope");
let scope_walk = format!("{prefix}_scope_walk");
let scope_base = format!("{prefix}_scope_base");
let scope_kind = format!("{prefix}_scope_kind");
let candidate = format!("{prefix}_candidate");
let paren_depth = format!("{prefix}_paren_depth");
let scan = format!("{prefix}_scan");
let rev = format!("{prefix}_rev");
let scan_kind = format!("{prefix}_scan_kind");
let scan_prev_kind = format!("{prefix}_scan_prev_kind");
let mut nodes = vec![
Node::let_bind(out_name, Expr::u32(SENTINEL)),
Node::let_bind(&base, vast_row_base_expr(idx.clone())),
Node::let_bind(
&parent,
vast_row_parent_from_base_expr(vast_nodes, Expr::var(&base)),
),
Node::loop_for(
&parent_walk,
Expr::u32(0),
Expr::var("annot_num_nodes"),
vec![Node::if_then(
Expr::and(
Expr::eq(Expr::var(out_name), Expr::u32(SENTINEL)),
Expr::lt(Expr::var(&parent), Expr::var("annot_num_nodes")),
),
vec![
Node::let_bind(
&parent_base,
vast_row_base_expr(Expr::var(&parent)),
),
Node::let_bind(
&parent_kind,
vast_row_kind_from_base_expr(vast_nodes, Expr::var(&parent_base)),
),
Node::let_bind(
&parent_prev_kind,
vast_prior_row_kind_expr(vast_nodes, Expr::var(&parent), 1),
),
Node::if_then(
Expr::and(
Expr::eq(Expr::var(&parent_kind), Expr::u32(TOK_LPAREN)),
Expr::eq(Expr::var(&parent_prev_kind), Expr::u32(TOK_IDENTIFIER)),
),
vec![Node::assign(out_name, Expr::var(&parent))],
),
Node::assign(
&parent,
vast_row_parent_from_base_expr(vast_nodes, Expr::var(&parent_base)),
),
],
)],
),
];
nodes.extend(emit_scope_open_for_index(
vast_nodes,
idx,
&scope,
&format!("{prefix}_scope_open"),
));
nodes.push(Node::loop_for(
&scope_walk,
Expr::u32(0),
Expr::var("annot_num_nodes"),
vec![Node::if_then(
Expr::and(
Expr::eq(Expr::var(out_name), Expr::u32(SENTINEL)),
Expr::lt(Expr::var(&scope), Expr::var("annot_num_nodes")),
),
vec![
Node::let_bind(&scope_base, vast_row_base_expr(Expr::var(&scope))),
Node::let_bind(
&scope_kind,
vast_row_kind_from_base_expr(vast_nodes, Expr::var(&scope_base)),
),
Node::if_then(
Expr::eq(Expr::var(&scope_kind), Expr::u32(TOK_LBRACE)),
vec![
Node::let_bind(&candidate, Expr::u32(SENTINEL)),
Node::let_bind(&paren_depth, Expr::u32(0)),
Node::loop_for(
&scan,
Expr::u32(0),
Expr::var(&scope),
vec![
Node::let_bind(
&rev,
Expr::sub(
Expr::sub(Expr::var(&scope), Expr::u32(1)),
Expr::var(&scan),
),
),
Node::let_bind(
&scan_kind,
vast_row_kind_expr(vast_nodes, Expr::var(&rev)),
),
Node::if_then(
Expr::eq(Expr::var(&scan_kind), Expr::u32(TOK_RPAREN)),
vec![Node::assign(
&paren_depth,
Expr::add(Expr::var(&paren_depth), Expr::u32(1)),
)],
),
Node::if_then(
Expr::and(
Expr::eq(Expr::var(&scan_kind), Expr::u32(TOK_LPAREN)),
Expr::gt(Expr::var(&paren_depth), Expr::u32(0)),
),
vec![
Node::assign(
&paren_depth,
Expr::sub(Expr::var(&paren_depth), Expr::u32(1)),
),
Node::if_then(
Expr::and(
Expr::eq(Expr::var(&paren_depth), Expr::u32(0)),
Expr::eq(
Expr::var(&candidate),
Expr::u32(SENTINEL),
),
),
vec![
Node::let_bind(
&scan_prev_kind,
Expr::select(
Expr::gt(Expr::var(&rev), Expr::u32(0)),
vast_row_kind_expr(
vast_nodes,
Expr::sub(
Expr::var(&rev),
Expr::u32(1),
),
),
Expr::u32(SENTINEL),
),
),
Node::if_then(
Expr::eq(
Expr::var(&scan_prev_kind),
Expr::u32(TOK_IDENTIFIER),
),
vec![Node::assign(&candidate, Expr::var(&rev))],
),
],
),
],
),
],
),
Node::if_then(
Expr::ne(Expr::var(&candidate), Expr::u32(SENTINEL)),
vec![Node::assign(out_name, Expr::var(&candidate))],
),
],
),
Node::assign(
&scope,
vast_row_parent_from_base_expr(vast_nodes, Expr::var(&scope_base)),
),
],
)],
));
nodes
}