mirror of
https://github.com/rust-lang/rust-analyzer
synced 2024-12-25 12:33:33 +00:00
Support if-let in scopes
This commit is contained in:
parent
c16530c988
commit
07cbb7d73d
12 changed files with 289 additions and 104 deletions
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@ -1,4 +1,7 @@
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use std::collections::HashMap;
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use std::{
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fmt,
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collections::HashMap,
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};
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use libsyntax2::{
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File, TextUnit, AstNode, SyntaxNodeRef, SyntaxNode, SmolStr,
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@ -49,33 +52,89 @@ fn compute_scopes(fn_def: ast::FnDef) -> FnScopes {
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.filter_map(|it| it.pat())
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.for_each(|it| scopes.add_bindings(root, it));
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let mut scope = root;
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if let Some(body) = fn_def.body() {
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for stmt in body.statements() {
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match stmt {
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ast::Stmt::LetStmt(stmt) => {
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scope = scopes.new_scope(scope);
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if let Some(pat) = stmt.pat() {
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scopes.add_bindings(scope, pat);
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}
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if let Some(expr) = stmt.initializer() {
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scopes.set_scope(expr.syntax(), scope)
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}
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}
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ast::Stmt::ExprStmt(expr) => {
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scopes.set_scope(expr.syntax(), scope)
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}
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}
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}
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if let Some(expr) = body.expr() {
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scopes.set_scope(expr.syntax(), scope)
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}
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compute_block_scopes(body, &mut scopes, root)
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}
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scopes
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}
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fn compute_block_scopes(block: ast::Block, scopes: &mut FnScopes, mut scope: ScopeId) {
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for stmt in block.statements() {
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match stmt {
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ast::Stmt::LetStmt(stmt) => {
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scope = scopes.new_scope(scope);
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if let Some(pat) = stmt.pat() {
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scopes.add_bindings(scope, pat);
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}
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if let Some(expr) = stmt.initializer() {
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scopes.set_scope(expr.syntax(), scope)
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}
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}
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ast::Stmt::ExprStmt(expr_stmt) => {
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if let Some(expr) = expr_stmt.expr() {
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scopes.set_scope(expr.syntax(), scope);
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compute_expr_scopes(expr, scopes, scope);
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}
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}
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}
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}
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if let Some(expr) = block.expr() {
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scopes.set_scope(expr.syntax(), scope);
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compute_expr_scopes(expr, scopes, scope);
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}
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}
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fn compute_expr_scopes(expr: ast::Expr, scopes: &mut FnScopes, scope: ScopeId) {
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match expr {
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ast::Expr::IfExpr(e) => {
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let cond_scope = e.condition().and_then(|cond| {
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compute_cond_scopes(cond, scopes, scope)
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});
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if let Some(block) = e.then_branch() {
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compute_block_scopes(block, scopes, cond_scope.unwrap_or(scope));
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}
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if let Some(block) = e.else_branch() {
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compute_block_scopes(block, scopes, scope);
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}
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},
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ast::Expr::WhileExpr(e) => {
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let cond_scope = e.condition().and_then(|cond| {
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compute_cond_scopes(cond, scopes, scope)
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});
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if let Some(block) = e.body() {
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compute_block_scopes(block, scopes, cond_scope.unwrap_or(scope));
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}
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},
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ast::Expr::BlockExpr(e) => {
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if let Some(block) = e.block() {
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compute_block_scopes(block, scopes, scope);
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}
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}
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// ForExpr(e) => TODO,
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_ => {
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expr.syntax().children()
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.filter_map(ast::Expr::cast)
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.for_each(|expr| compute_expr_scopes(expr, scopes, scope))
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}
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};
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fn compute_cond_scopes(cond: ast::Condition, scopes: &mut FnScopes, scope: ScopeId) -> Option<ScopeId> {
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if let Some(expr) = cond.expr() {
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compute_expr_scopes(expr, scopes, scope);
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}
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if let Some(pat) = cond.pat() {
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let s = scopes.new_scope(scope);
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scopes.add_bindings(s, pat);
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Some(s)
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} else {
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None
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}
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}
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}
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type ScopeId = usize;
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#[derive(Debug)]
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struct FnScopes {
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scopes: Vec<ScopeData>,
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scope_for: HashMap<SyntaxNode, ScopeId>,
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@ -120,6 +179,7 @@ impl FnScopes {
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}
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}
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#[derive(Debug)]
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struct ScopeData {
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parent: Option<ScopeId>,
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entries: Vec<ScopeEntry>
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@ -149,3 +209,12 @@ impl ScopeEntry {
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.unwrap()
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}
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}
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impl fmt::Debug for ScopeEntry {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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f.debug_struct("ScopeEntry")
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.field("name", &self.name())
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.field("syntax", &self.syntax)
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.finish()
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}
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}
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@ -273,6 +273,19 @@ fn quux(x: i32) {
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}
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", r#"[CompletionItem { name: "y" },
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CompletionItem { name: "x" }]"#);
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do_check(r"
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fn quux() {
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if let Some(x) = foo() {
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let y = 92;
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};
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if let Some(a) = bar() {
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let b = 62;
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1 + <|>
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}
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}
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", r#"[CompletionItem { name: "b" },
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CompletionItem { name: "a" }]"#);
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}
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fn file(text: &str) -> File {
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@ -141,7 +141,11 @@ impl<'a> AstNode<'a> for BlockExpr<'a> {
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fn syntax(self) -> SyntaxNodeRef<'a> { self.syntax }
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}
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impl<'a> BlockExpr<'a> {}
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impl<'a> BlockExpr<'a> {
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pub fn block(self) -> Option<Block<'a>> {
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super::child_opt(self)
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}
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}
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// BreakExpr
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#[derive(Debug, Clone, Copy)]
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@ -197,6 +201,32 @@ impl<'a> AstNode<'a> for CastExpr<'a> {
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impl<'a> CastExpr<'a> {}
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// Condition
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#[derive(Debug, Clone, Copy)]
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pub struct Condition<'a> {
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syntax: SyntaxNodeRef<'a>,
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}
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impl<'a> AstNode<'a> for Condition<'a> {
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fn cast(syntax: SyntaxNodeRef<'a>) -> Option<Self> {
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match syntax.kind() {
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CONDITION => Some(Condition { syntax }),
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_ => None,
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}
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}
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fn syntax(self) -> SyntaxNodeRef<'a> { self.syntax }
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}
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impl<'a> Condition<'a> {
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pub fn pat(self) -> Option<Pat<'a>> {
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super::child_opt(self)
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}
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pub fn expr(self) -> Option<Expr<'a>> {
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super::child_opt(self)
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}
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}
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// ConstDef
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#[derive(Debug, Clone, Copy)]
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pub struct ConstDef<'a> {
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@ -403,7 +433,11 @@ impl<'a> AstNode<'a> for ExprStmt<'a> {
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fn syntax(self) -> SyntaxNodeRef<'a> { self.syntax }
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}
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impl<'a> ExprStmt<'a> {}
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impl<'a> ExprStmt<'a> {
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pub fn expr(self) -> Option<Expr<'a>> {
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super::child_opt(self)
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}
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}
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// FieldExpr
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#[derive(Debug, Clone, Copy)]
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@ -504,7 +538,11 @@ impl<'a> AstNode<'a> for ForExpr<'a> {
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fn syntax(self) -> SyntaxNodeRef<'a> { self.syntax }
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}
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impl<'a> ForExpr<'a> {}
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impl<'a> ForExpr<'a> {
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pub fn body(self) -> Option<Block<'a>> {
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super::child_opt(self)
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}
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}
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// ForType
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#[derive(Debug, Clone, Copy)]
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@ -540,7 +578,11 @@ impl<'a> AstNode<'a> for IfExpr<'a> {
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fn syntax(self) -> SyntaxNodeRef<'a> { self.syntax }
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}
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impl<'a> IfExpr<'a> {}
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impl<'a> IfExpr<'a> {
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pub fn condition(self) -> Option<Condition<'a>> {
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super::child_opt(self)
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}
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}
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// ImplItem
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#[derive(Debug, Clone, Copy)]
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@ -674,7 +716,11 @@ impl<'a> AstNode<'a> for LoopExpr<'a> {
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fn syntax(self) -> SyntaxNodeRef<'a> { self.syntax }
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}
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impl<'a> LoopExpr<'a> {}
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impl<'a> LoopExpr<'a> {
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pub fn body(self) -> Option<Block<'a>> {
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super::child_opt(self)
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}
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}
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// MatchArm
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#[derive(Debug, Clone, Copy)]
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@ -1742,5 +1788,13 @@ impl<'a> AstNode<'a> for WhileExpr<'a> {
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fn syntax(self) -> SyntaxNodeRef<'a> { self.syntax }
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}
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impl<'a> WhileExpr<'a> {}
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impl<'a> WhileExpr<'a> {
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pub fn condition(self) -> Option<Condition<'a>> {
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super::child_opt(self)
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}
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pub fn body(self) -> Option<Block<'a>> {
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super::child_opt(self)
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}
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}
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@ -115,6 +115,18 @@ impl<'a> Module<'a> {
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}
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}
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impl<'a> IfExpr<'a> {
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pub fn then_branch(self) -> Option<Block<'a>> {
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self.blocks().nth(0)
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}
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pub fn else_branch(self) -> Option<Block<'a>> {
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self.blocks().nth(1)
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}
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fn blocks(self) -> impl Iterator<Item=Block<'a>> {
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children(self)
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}
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}
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fn child_opt<'a, P: AstNode<'a>, C: AstNode<'a>>(parent: P) -> Option<C> {
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children(parent).next()
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}
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@ -162,9 +162,10 @@ Grammar(
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"PATH_EXPR",
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"LAMBDA_EXPR",
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"IF_EXPR",
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"WHILE_EXPR",
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"CONDITION",
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"LOOP_EXPR",
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"FOR_EXPR",
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"WHILE_EXPR",
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"CONTINUE_EXPR",
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"BREAK_EXPR",
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"LABEL",
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@ -336,14 +337,27 @@ Grammar(
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"ParenExpr": (),
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"PathExpr": (),
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"LambdaExpr": (),
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"IfExpr": (),
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"LoopExpr": (),
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"ForExpr": (),
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"WhileExpr": (),
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"IfExpr": (
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options: [ ["condition", "Condition"] ]
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),
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"LoopExpr": (
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options: [ ["body", "Block"] ]
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),
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"ForExpr": (
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options: [ ["body", "Block"] ]
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),
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"WhileExpr": (
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options: [
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["condition", "Condition"],
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["body", "Block"],
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]
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),
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"ContinueExpr": (),
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"BreakExpr": (),
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"Label": (),
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"BlockExpr": (),
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"BlockExpr": (
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options: [ ["block", "Block"] ]
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),
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"ReturnExpr": (),
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"MatchExpr": (),
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"MatchArmList": (),
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@ -432,11 +446,19 @@ Grammar(
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"TypeParamList": ( collections: [ ["type_params", "TypeParam" ] ]),
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"TypeParam": ( traits: ["NameOwner"] ),
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"WhereClause": (),
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"ExprStmt": (),
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"ExprStmt": (
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options: [ ["expr", "Expr"] ]
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),
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"LetStmt": ( options: [
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["pat", "Pat"],
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["initializer", "Expr"],
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]),
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"Condition": (
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options: [
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[ "pat", "Pat" ],
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[ "expr", "Expr" ],
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]
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),
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"Stmt": (
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enum: ["ExprStmt", "LetStmt"],
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),
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@ -237,11 +237,13 @@ fn for_expr(p: &mut Parser, m: Option<Marker>) -> CompletedMarker {
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// test cond
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// fn foo() { if let Some(_) = None {} }
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fn cond(p: &mut Parser) {
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let m = p.start();
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if p.eat(LET_KW) {
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patterns::pattern(p);
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p.expect(EQ);
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}
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expr_no_struct(p)
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expr_no_struct(p);
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m.complete(p, CONDITION);
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}
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// test match_expr
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@ -158,9 +158,10 @@ pub enum SyntaxKind {
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PATH_EXPR,
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LAMBDA_EXPR,
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IF_EXPR,
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WHILE_EXPR,
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CONDITION,
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LOOP_EXPR,
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FOR_EXPR,
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WHILE_EXPR,
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CONTINUE_EXPR,
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BREAK_EXPR,
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LABEL,
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@ -418,9 +419,10 @@ impl SyntaxKind {
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PATH_EXPR => &SyntaxInfo { name: "PATH_EXPR" },
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LAMBDA_EXPR => &SyntaxInfo { name: "LAMBDA_EXPR" },
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IF_EXPR => &SyntaxInfo { name: "IF_EXPR" },
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WHILE_EXPR => &SyntaxInfo { name: "WHILE_EXPR" },
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CONDITION => &SyntaxInfo { name: "CONDITION" },
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LOOP_EXPR => &SyntaxInfo { name: "LOOP_EXPR" },
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FOR_EXPR => &SyntaxInfo { name: "FOR_EXPR" },
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WHILE_EXPR => &SyntaxInfo { name: "WHILE_EXPR" },
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CONTINUE_EXPR => &SyntaxInfo { name: "CONTINUE_EXPR" },
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BREAK_EXPR => &SyntaxInfo { name: "BREAK_EXPR" },
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LABEL => &SyntaxInfo { name: "LABEL" },
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|
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@ -15,8 +15,9 @@ ROOT@[0; 107)
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IF_EXPR@[15; 25)
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IF_KW@[15; 17)
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WHITESPACE@[17; 18)
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LITERAL@[18; 22)
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TRUE_KW@[18; 22)
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CONDITION@[18; 22)
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LITERAL@[18; 22)
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TRUE_KW@[18; 22)
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WHITESPACE@[22; 23)
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BLOCK@[23; 25)
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L_CURLY@[23; 24)
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|
@ -27,8 +28,9 @@ ROOT@[0; 107)
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IF_EXPR@[31; 49)
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IF_KW@[31; 33)
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WHITESPACE@[33; 34)
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LITERAL@[34; 38)
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TRUE_KW@[34; 38)
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CONDITION@[34; 38)
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LITERAL@[34; 38)
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TRUE_KW@[34; 38)
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WHITESPACE@[38; 39)
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BLOCK@[39; 41)
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L_CURLY@[39; 40)
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|
@ -45,8 +47,9 @@ ROOT@[0; 107)
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IF_EXPR@[55; 90)
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IF_KW@[55; 57)
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WHITESPACE@[57; 58)
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LITERAL@[58; 62)
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TRUE_KW@[58; 62)
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CONDITION@[58; 62)
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LITERAL@[58; 62)
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TRUE_KW@[58; 62)
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WHITESPACE@[62; 63)
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BLOCK@[63; 65)
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L_CURLY@[63; 64)
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|
@ -57,8 +60,9 @@ ROOT@[0; 107)
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IF_EXPR@[71; 90)
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IF_KW@[71; 73)
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WHITESPACE@[73; 74)
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LITERAL@[74; 79)
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FALSE_KW@[74; 79)
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CONDITION@[74; 79)
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LITERAL@[74; 79)
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FALSE_KW@[74; 79)
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WHITESPACE@[79; 80)
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BLOCK@[80; 82)
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L_CURLY@[80; 81)
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|
@ -75,11 +79,12 @@ ROOT@[0; 107)
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IF_EXPR@[96; 103)
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IF_KW@[96; 98)
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WHITESPACE@[98; 99)
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PATH_EXPR@[99; 100)
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PATH@[99; 100)
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PATH_SEGMENT@[99; 100)
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NAME_REF@[99; 100)
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IDENT@[99; 100) "S"
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CONDITION@[99; 100)
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PATH_EXPR@[99; 100)
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PATH@[99; 100)
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PATH_SEGMENT@[99; 100)
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NAME_REF@[99; 100)
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IDENT@[99; 100) "S"
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WHITESPACE@[100; 101)
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BLOCK@[101; 103)
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L_CURLY@[101; 102)
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|
|
|
@ -14,25 +14,26 @@ ROOT@[0; 38)
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IF_EXPR@[11; 35)
|
||||
IF_KW@[11; 13)
|
||||
WHITESPACE@[13; 14)
|
||||
LET_KW@[14; 17)
|
||||
WHITESPACE@[17; 18)
|
||||
TUPLE_STRUCT_PAT@[18; 25)
|
||||
PATH@[18; 22)
|
||||
PATH_SEGMENT@[18; 22)
|
||||
NAME_REF@[18; 22)
|
||||
IDENT@[18; 22) "Some"
|
||||
L_PAREN@[22; 23)
|
||||
PLACEHOLDER_PAT@[23; 24)
|
||||
UNDERSCORE@[23; 24)
|
||||
R_PAREN@[24; 25)
|
||||
WHITESPACE@[25; 26)
|
||||
EQ@[26; 27)
|
||||
WHITESPACE@[27; 28)
|
||||
PATH_EXPR@[28; 32)
|
||||
PATH@[28; 32)
|
||||
PATH_SEGMENT@[28; 32)
|
||||
NAME_REF@[28; 32)
|
||||
IDENT@[28; 32) "None"
|
||||
CONDITION@[14; 32)
|
||||
LET_KW@[14; 17)
|
||||
WHITESPACE@[17; 18)
|
||||
TUPLE_STRUCT_PAT@[18; 25)
|
||||
PATH@[18; 22)
|
||||
PATH_SEGMENT@[18; 22)
|
||||
NAME_REF@[18; 22)
|
||||
IDENT@[18; 22) "Some"
|
||||
L_PAREN@[22; 23)
|
||||
PLACEHOLDER_PAT@[23; 24)
|
||||
UNDERSCORE@[23; 24)
|
||||
R_PAREN@[24; 25)
|
||||
WHITESPACE@[25; 26)
|
||||
EQ@[26; 27)
|
||||
WHITESPACE@[27; 28)
|
||||
PATH_EXPR@[28; 32)
|
||||
PATH@[28; 32)
|
||||
PATH_SEGMENT@[28; 32)
|
||||
NAME_REF@[28; 32)
|
||||
IDENT@[28; 32) "None"
|
||||
WHITESPACE@[32; 33)
|
||||
BLOCK@[33; 35)
|
||||
L_CURLY@[33; 34)
|
||||
|
|
|
@ -15,8 +15,9 @@ ROOT@[0; 70)
|
|||
WHILE_EXPR@[15; 28)
|
||||
WHILE_KW@[15; 20)
|
||||
WHITESPACE@[20; 21)
|
||||
LITERAL@[21; 25)
|
||||
TRUE_KW@[21; 25)
|
||||
CONDITION@[21; 25)
|
||||
LITERAL@[21; 25)
|
||||
TRUE_KW@[21; 25)
|
||||
WHITESPACE@[25; 26)
|
||||
BLOCK@[26; 28)
|
||||
L_CURLY@[26; 27)
|
||||
|
@ -27,33 +28,34 @@ ROOT@[0; 70)
|
|||
WHILE_EXPR@[34; 66)
|
||||
WHILE_KW@[34; 39)
|
||||
WHITESPACE@[39; 40)
|
||||
LET_KW@[40; 43)
|
||||
WHITESPACE@[43; 44)
|
||||
TUPLE_STRUCT_PAT@[44; 51)
|
||||
PATH@[44; 48)
|
||||
PATH_SEGMENT@[44; 48)
|
||||
NAME_REF@[44; 48)
|
||||
IDENT@[44; 48) "Some"
|
||||
L_PAREN@[48; 49)
|
||||
BIND_PAT@[49; 50)
|
||||
NAME@[49; 50)
|
||||
IDENT@[49; 50) "x"
|
||||
R_PAREN@[50; 51)
|
||||
WHITESPACE@[51; 52)
|
||||
EQ@[52; 53)
|
||||
WHITESPACE@[53; 54)
|
||||
METHOD_CALL_EXPR@[54; 63)
|
||||
PATH_EXPR@[54; 56)
|
||||
PATH@[54; 56)
|
||||
PATH_SEGMENT@[54; 56)
|
||||
NAME_REF@[54; 56)
|
||||
IDENT@[54; 56) "it"
|
||||
DOT@[56; 57)
|
||||
NAME_REF@[57; 61)
|
||||
IDENT@[57; 61) "next"
|
||||
ARG_LIST@[61; 63)
|
||||
L_PAREN@[61; 62)
|
||||
R_PAREN@[62; 63)
|
||||
CONDITION@[40; 63)
|
||||
LET_KW@[40; 43)
|
||||
WHITESPACE@[43; 44)
|
||||
TUPLE_STRUCT_PAT@[44; 51)
|
||||
PATH@[44; 48)
|
||||
PATH_SEGMENT@[44; 48)
|
||||
NAME_REF@[44; 48)
|
||||
IDENT@[44; 48) "Some"
|
||||
L_PAREN@[48; 49)
|
||||
BIND_PAT@[49; 50)
|
||||
NAME@[49; 50)
|
||||
IDENT@[49; 50) "x"
|
||||
R_PAREN@[50; 51)
|
||||
WHITESPACE@[51; 52)
|
||||
EQ@[52; 53)
|
||||
WHITESPACE@[53; 54)
|
||||
METHOD_CALL_EXPR@[54; 63)
|
||||
PATH_EXPR@[54; 56)
|
||||
PATH@[54; 56)
|
||||
PATH_SEGMENT@[54; 56)
|
||||
NAME_REF@[54; 56)
|
||||
IDENT@[54; 56) "it"
|
||||
DOT@[56; 57)
|
||||
NAME_REF@[57; 61)
|
||||
IDENT@[57; 61) "next"
|
||||
ARG_LIST@[61; 63)
|
||||
L_PAREN@[61; 62)
|
||||
R_PAREN@[62; 63)
|
||||
WHITESPACE@[63; 64)
|
||||
BLOCK@[64; 66)
|
||||
L_CURLY@[64; 65)
|
||||
|
|
|
@ -15,8 +15,9 @@ ROOT@[0; 107)
|
|||
IF_EXPR@[15; 25)
|
||||
IF_KW@[15; 17)
|
||||
WHITESPACE@[17; 18)
|
||||
LITERAL@[18; 22)
|
||||
TRUE_KW@[18; 22)
|
||||
CONDITION@[18; 22)
|
||||
LITERAL@[18; 22)
|
||||
TRUE_KW@[18; 22)
|
||||
WHITESPACE@[22; 23)
|
||||
BLOCK@[23; 25)
|
||||
L_CURLY@[23; 24)
|
||||
|
@ -46,8 +47,9 @@ ROOT@[0; 107)
|
|||
WHILE_EXPR@[58; 71)
|
||||
WHILE_KW@[58; 63)
|
||||
WHITESPACE@[63; 64)
|
||||
LITERAL@[64; 68)
|
||||
TRUE_KW@[64; 68)
|
||||
CONDITION@[64; 68)
|
||||
LITERAL@[64; 68)
|
||||
TRUE_KW@[64; 68)
|
||||
WHITESPACE@[68; 69)
|
||||
BLOCK@[69; 71)
|
||||
L_CURLY@[69; 70)
|
||||
|
|
|
@ -31,8 +31,9 @@ ROOT@[0; 74)
|
|||
WHITESPACE@[34; 35)
|
||||
WHILE_KW@[35; 40)
|
||||
WHITESPACE@[40; 41)
|
||||
LITERAL@[41; 45)
|
||||
TRUE_KW@[41; 45)
|
||||
CONDITION@[41; 45)
|
||||
LITERAL@[41; 45)
|
||||
TRUE_KW@[41; 45)
|
||||
WHITESPACE@[45; 46)
|
||||
BLOCK@[46; 48)
|
||||
L_CURLY@[46; 47)
|
||||
|
|
Loading…
Reference in a new issue