mirror of
https://github.com/slint-ui/slint.git
synced 2025-09-28 21:04:47 +00:00
697 lines
20 KiB
Rust
697 lines
20 KiB
Rust
/* LICENSE BEGIN
|
|
This file is part of the SixtyFPS Project -- https://sixtyfps.io
|
|
Copyright (c) 2020 Olivier Goffart <olivier.goffart@sixtyfps.io>
|
|
Copyright (c) 2020 Simon Hausmann <simon.hausmann@sixtyfps.io>
|
|
|
|
SPDX-License-Identifier: GPL-3.0-only
|
|
This file is also available under commercial licensing terms.
|
|
Please contact info@sixtyfps.io for more information.
|
|
LICENSE END */
|
|
use super::expressions::parse_expression;
|
|
use super::prelude::*;
|
|
use super::r#type::parse_type;
|
|
use super::statements::parse_statement;
|
|
|
|
#[cfg_attr(test, parser_test)]
|
|
/// ```test,Document
|
|
/// Type := Base { }
|
|
/// Type := Base { SubElement { } }
|
|
/// component Comp := Base {} Type := Base {}
|
|
/// Type := Base {} export { Type }
|
|
/// import { Base } from "somewhere"; Type := Base {}
|
|
/// ```
|
|
pub fn parse_document(p: &mut impl Parser) -> bool {
|
|
let mut p = p.start_node(SyntaxKind::Document);
|
|
|
|
loop {
|
|
match p.peek().as_str() {
|
|
"export" => {
|
|
if !parse_export(&mut *p) {
|
|
return false;
|
|
}
|
|
}
|
|
"import" => {
|
|
if !parse_import_specifier(&mut *p) {
|
|
return false;
|
|
}
|
|
}
|
|
_ => {
|
|
if p.peek().as_str() == "component" && p.nth(1).kind() != SyntaxKind::ColonEqual {
|
|
p.expect(SyntaxKind::Identifier);
|
|
}
|
|
|
|
if !parse_component(&mut *p) {
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
|
|
if p.nth(0).kind() == SyntaxKind::Eof {
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
|
|
#[cfg_attr(test, parser_test)]
|
|
/// ```test,Component
|
|
/// Type := Base { }
|
|
/// Type := Base { prop: value; }
|
|
/// Type := Base { SubElement { } }
|
|
/// Struct := { property<int> xx; }
|
|
/// ```
|
|
pub fn parse_component(p: &mut impl Parser) -> bool {
|
|
let mut p = p.start_node(SyntaxKind::Component);
|
|
if !(p.expect(SyntaxKind::Identifier) && p.expect(SyntaxKind::ColonEqual)) {
|
|
return false;
|
|
}
|
|
|
|
if p.peek().kind() == SyntaxKind::LBrace {
|
|
let mut p = p.start_node(SyntaxKind::Element);
|
|
p.consume();
|
|
parse_element_content(&mut *p);
|
|
return p.expect(SyntaxKind::RBrace);
|
|
}
|
|
|
|
parse_element(&mut *p)
|
|
}
|
|
|
|
#[cfg_attr(test, parser_test)]
|
|
/// ```test,Element
|
|
/// Item { }
|
|
/// Item { property: value; SubElement { } }
|
|
/// ```
|
|
pub fn parse_element(p: &mut impl Parser) -> bool {
|
|
let mut p = p.start_node(SyntaxKind::Element);
|
|
if !(parse_qualified_name(&mut *p) && p.expect(SyntaxKind::LBrace)) {
|
|
return false;
|
|
}
|
|
|
|
parse_element_content(&mut *p);
|
|
|
|
p.expect(SyntaxKind::RBrace)
|
|
}
|
|
|
|
#[cfg_attr(test, parser_test)]
|
|
/// ```test
|
|
/// property1: value; property2: value;
|
|
/// sub := Sub { }
|
|
/// for xx in model: Sub {}
|
|
/// if (condition) : Sub {}
|
|
/// clicked => {}
|
|
/// signal foobar;
|
|
/// property<int> width;
|
|
/// animate someProp { }
|
|
/// animate * { }
|
|
/// $children
|
|
/// double_binding <=> element.property;
|
|
/// ```
|
|
fn parse_element_content(p: &mut impl Parser) {
|
|
loop {
|
|
match p.nth(0).kind() {
|
|
SyntaxKind::RBrace => return,
|
|
SyntaxKind::Eof => return,
|
|
SyntaxKind::Identifier => match p.nth(1).kind() {
|
|
SyntaxKind::Colon => parse_property_binding(&mut *p),
|
|
SyntaxKind::ColonEqual | SyntaxKind::LBrace => parse_sub_element(&mut *p),
|
|
SyntaxKind::FatArrow | SyntaxKind::LParent if p.peek().as_str() != "if" => {
|
|
parse_signal_connection(&mut *p)
|
|
}
|
|
SyntaxKind::DoubleArrow => parse_two_way_binding(&mut *p),
|
|
SyntaxKind::Identifier if p.peek().as_str() == "for" => {
|
|
parse_repeated_element(&mut *p);
|
|
}
|
|
SyntaxKind::Identifier if p.peek().as_str() == "signal" => {
|
|
parse_signal_declaration(&mut *p);
|
|
}
|
|
SyntaxKind::Identifier | SyntaxKind::Star if p.peek().as_str() == "animate" => {
|
|
parse_property_animation(&mut *p);
|
|
}
|
|
SyntaxKind::LAngle if p.peek().as_str() == "property" => {
|
|
parse_property_declaration(&mut *p);
|
|
}
|
|
SyntaxKind::LParent if p.peek().as_str() == "if" => {
|
|
parse_if_element(&mut *p);
|
|
}
|
|
SyntaxKind::LBracket if p.peek().as_str() == "states" => {
|
|
parse_states(&mut *p);
|
|
}
|
|
SyntaxKind::LBracket if p.peek().as_str() == "transitions" => {
|
|
parse_transitions(&mut *p);
|
|
}
|
|
_ => {
|
|
p.consume();
|
|
p.error("FIXME");
|
|
}
|
|
},
|
|
SyntaxKind::Dollar => {
|
|
let checkpoint = p.checkpoint();
|
|
p.consume();
|
|
if p.peek().as_str() == "children" {
|
|
{
|
|
let _ =
|
|
p.start_node_at(checkpoint.clone(), SyntaxKind::ChildrenPlaceholder);
|
|
}
|
|
p.consume()
|
|
} else {
|
|
p.consume();
|
|
p.error("Unexpected identifier. Expected $children.")
|
|
}
|
|
}
|
|
_ => {
|
|
p.consume();
|
|
p.error("FIXME");
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
#[cfg_attr(test, parser_test)]
|
|
/// ```test,SubElement
|
|
/// Bar {}
|
|
/// foo := Bar {}
|
|
/// Bar { x : y ; }
|
|
/// ```
|
|
/// Must consume at least one token
|
|
fn parse_sub_element(p: &mut impl Parser) {
|
|
let mut p = p.start_node(SyntaxKind::SubElement);
|
|
if p.nth(1).kind() == SyntaxKind::ColonEqual {
|
|
assert!(p.expect(SyntaxKind::Identifier));
|
|
p.expect(SyntaxKind::ColonEqual);
|
|
}
|
|
parse_element(&mut *p);
|
|
}
|
|
|
|
#[cfg_attr(test, parser_test)]
|
|
/// ```test,RepeatedElement
|
|
/// for xx in mm: Elem { }
|
|
/// for [idx] in mm: Elem { }
|
|
/// for xx [idx] in foo.bar: Elem { }
|
|
/// ```
|
|
/// Must consume at least one token
|
|
fn parse_repeated_element(p: &mut impl Parser) {
|
|
debug_assert_eq!(p.peek().as_str(), "for");
|
|
let mut p = p.start_node(SyntaxKind::RepeatedElement);
|
|
p.consume(); // "for"
|
|
if p.nth(0).kind() == SyntaxKind::Identifier {
|
|
let mut p = p.start_node(SyntaxKind::DeclaredIdentifier);
|
|
p.expect(SyntaxKind::Identifier);
|
|
}
|
|
if p.nth(0).kind() == SyntaxKind::LBracket {
|
|
let mut p = p.start_node(SyntaxKind::RepeatedIndex);
|
|
p.expect(SyntaxKind::LBracket);
|
|
p.expect(SyntaxKind::Identifier);
|
|
p.expect(SyntaxKind::RBracket);
|
|
}
|
|
if p.peek().as_str() != "in" {
|
|
p.error("Invalid 'for' syntax: there should be a 'in' token");
|
|
return;
|
|
}
|
|
p.consume(); // "in"
|
|
parse_expression(&mut *p);
|
|
p.expect(SyntaxKind::Colon);
|
|
parse_element(&mut *p);
|
|
}
|
|
|
|
#[cfg_attr(test, parser_test)]
|
|
/// ```test,ConditionalElement
|
|
/// if (condition) : Elem { }
|
|
/// if (foo ? bar : xx) : Elem { foo:bar; Elem {}}
|
|
/// ```
|
|
/// Must consume at least one token
|
|
fn parse_if_element(p: &mut impl Parser) {
|
|
debug_assert_eq!(p.peek().as_str(), "if");
|
|
let mut p = p.start_node(SyntaxKind::ConditionalElement);
|
|
p.consume(); // "if"
|
|
if !p.expect(SyntaxKind::LParent) {
|
|
return;
|
|
}
|
|
parse_expression(&mut *p);
|
|
if !p.expect(SyntaxKind::RParent) || !p.expect(SyntaxKind::Colon) {
|
|
return;
|
|
}
|
|
parse_element(&mut *p);
|
|
}
|
|
|
|
#[cfg_attr(test, parser_test)]
|
|
/// ```test,QualifiedName
|
|
/// Rectangle
|
|
/// MyModule.Rectangle
|
|
/// Deeply.Nested.MyModule.Rectangle
|
|
/// ```
|
|
pub fn parse_qualified_name(p: &mut impl Parser) -> bool {
|
|
let mut p = p.start_node(SyntaxKind::QualifiedName);
|
|
if !p.expect(SyntaxKind::Identifier) {
|
|
return false;
|
|
}
|
|
|
|
loop {
|
|
if p.nth(0).kind() != SyntaxKind::Dot {
|
|
break;
|
|
}
|
|
p.consume();
|
|
p.expect(SyntaxKind::Identifier);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
#[cfg_attr(test, parser_test)]
|
|
/// ```test,Binding
|
|
/// foo: bar;
|
|
/// foo: {}
|
|
/// ```
|
|
fn parse_property_binding(p: &mut impl Parser) {
|
|
let mut p = p.start_node(SyntaxKind::Binding);
|
|
p.consume();
|
|
p.expect(SyntaxKind::Colon);
|
|
parse_binding_expression(&mut *p);
|
|
}
|
|
|
|
#[cfg_attr(test, parser_test)]
|
|
/// ```test,BindingExpression
|
|
/// { }
|
|
/// expression ;
|
|
/// {expression }
|
|
/// {object: 42};
|
|
/// ```
|
|
fn parse_binding_expression(p: &mut impl Parser) {
|
|
let mut p = p.start_node(SyntaxKind::BindingExpression);
|
|
if p.nth(0).kind() == SyntaxKind::LBrace && p.nth(2).kind() != SyntaxKind::Colon {
|
|
parse_code_block(&mut *p);
|
|
p.test(SyntaxKind::Semicolon);
|
|
} else {
|
|
parse_expression(&mut *p);
|
|
p.expect(SyntaxKind::Semicolon);
|
|
}
|
|
}
|
|
|
|
#[cfg_attr(test, parser_test)]
|
|
/// ```test,CodeBlock
|
|
/// { }
|
|
/// { expression }
|
|
/// { expression ; expression }
|
|
/// { expression ; expression ; }
|
|
/// { ;;;; }
|
|
/// ```
|
|
pub fn parse_code_block(p: &mut impl Parser) {
|
|
let mut p = p.start_node(SyntaxKind::CodeBlock);
|
|
p.expect(SyntaxKind::LBrace); // Or assert?
|
|
|
|
while p.nth(0).kind() != SyntaxKind::RBrace {
|
|
if !parse_statement(&mut *p) {
|
|
break;
|
|
}
|
|
}
|
|
p.expect(SyntaxKind::RBrace);
|
|
}
|
|
|
|
#[cfg_attr(test, parser_test)]
|
|
/// ```test,SignalConnection
|
|
/// clicked => {}
|
|
/// clicked() => { foo; }
|
|
/// mouse_move(x, y) => {}
|
|
/// mouse_move(x, y, ) => { bar; goo; }
|
|
/// ```
|
|
fn parse_signal_connection(p: &mut impl Parser) {
|
|
let mut p = p.start_node(SyntaxKind::SignalConnection);
|
|
p.consume(); // the identifier
|
|
if p.test(SyntaxKind::LParent) {
|
|
while p.peek().kind() != SyntaxKind::RParent {
|
|
{
|
|
let mut p = p.start_node(SyntaxKind::DeclaredIdentifier);
|
|
p.expect(SyntaxKind::Identifier);
|
|
}
|
|
if !p.test(SyntaxKind::Comma) {
|
|
break;
|
|
}
|
|
}
|
|
p.expect(SyntaxKind::RParent);
|
|
}
|
|
p.expect(SyntaxKind::FatArrow);
|
|
parse_code_block(&mut *p);
|
|
}
|
|
|
|
#[cfg_attr(test, parser_test)]
|
|
/// ```test,TwoWayBinding
|
|
/// foo <=> bar;
|
|
/// foo <=> bar.xxx;
|
|
/// ```
|
|
fn parse_two_way_binding(p: &mut impl Parser) {
|
|
let mut p = p.start_node(SyntaxKind::TwoWayBinding);
|
|
p.consume(); // the identifier
|
|
p.expect(SyntaxKind::DoubleArrow);
|
|
parse_expression(&mut *p);
|
|
p.expect(SyntaxKind::Semicolon);
|
|
}
|
|
|
|
#[cfg_attr(test, parser_test)]
|
|
/// ```test,SignalDeclaration
|
|
/// signal foobar;
|
|
/// signal my_signal();
|
|
/// signal foo(int, string);
|
|
/// signal one_arg({ a: string, b: string});
|
|
/// signal end_coma(a, b, c,);
|
|
/// ```
|
|
/// Must consume at least one token
|
|
fn parse_signal_declaration(p: &mut impl Parser) {
|
|
debug_assert_eq!(p.peek().as_str(), "signal");
|
|
let mut p = p.start_node(SyntaxKind::SignalDeclaration);
|
|
p.consume(); // "signal"
|
|
{
|
|
let mut p = p.start_node(SyntaxKind::DeclaredIdentifier);
|
|
p.expect(SyntaxKind::Identifier);
|
|
}
|
|
if p.test(SyntaxKind::LParent) {
|
|
while p.peek().kind() != SyntaxKind::RParent {
|
|
parse_type(&mut *p);
|
|
if !p.test(SyntaxKind::Comma) {
|
|
break;
|
|
}
|
|
}
|
|
p.expect(SyntaxKind::RParent);
|
|
}
|
|
p.expect(SyntaxKind::Semicolon);
|
|
}
|
|
|
|
#[cfg_attr(test, parser_test)]
|
|
/// ```test,PropertyDeclaration
|
|
/// property<int> foobar;
|
|
/// property<string> text: "Something";
|
|
/// property<string> text <=> two.way;
|
|
/// ```
|
|
fn parse_property_declaration(p: &mut impl Parser) {
|
|
debug_assert_eq!(p.peek().as_str(), "property");
|
|
let mut p = p.start_node(SyntaxKind::PropertyDeclaration);
|
|
p.consume(); // property
|
|
p.expect(SyntaxKind::LAngle);
|
|
parse_type(&mut *p);
|
|
p.expect(SyntaxKind::RAngle);
|
|
{
|
|
let mut p = p.start_node(SyntaxKind::DeclaredIdentifier);
|
|
p.expect(SyntaxKind::Identifier);
|
|
}
|
|
match p.nth(0).kind() {
|
|
SyntaxKind::Colon => {
|
|
p.consume();
|
|
parse_binding_expression(&mut *p);
|
|
}
|
|
SyntaxKind::DoubleArrow => {
|
|
let mut p = p.start_node(SyntaxKind::TwoWayBinding);
|
|
p.consume();
|
|
parse_expression(&mut *p);
|
|
p.expect(SyntaxKind::Semicolon);
|
|
}
|
|
_ => {
|
|
p.expect(SyntaxKind::Semicolon);
|
|
}
|
|
}
|
|
}
|
|
|
|
#[cfg_attr(test, parser_test)]
|
|
/// ```test,PropertyAnimation
|
|
/// animate x { duration: 1000; }
|
|
/// animate x, foo.y { }
|
|
/// animate * { }
|
|
/// ```
|
|
fn parse_property_animation(p: &mut impl Parser) {
|
|
debug_assert_eq!(p.peek().as_str(), "animate");
|
|
let mut p = p.start_node(SyntaxKind::PropertyAnimation);
|
|
p.consume(); // animate
|
|
if p.nth(0).kind() == SyntaxKind::Star {
|
|
p.consume();
|
|
} else {
|
|
parse_qualified_name(&mut *p);
|
|
while p.nth(0).kind() == SyntaxKind::Comma {
|
|
p.consume();
|
|
parse_qualified_name(&mut *p);
|
|
}
|
|
};
|
|
p.expect(SyntaxKind::LBrace);
|
|
|
|
loop {
|
|
match p.nth(0).kind() {
|
|
SyntaxKind::RBrace => {
|
|
p.consume();
|
|
return;
|
|
}
|
|
SyntaxKind::Eof => return,
|
|
SyntaxKind::Identifier => match p.nth(1).kind() {
|
|
SyntaxKind::Colon => parse_property_binding(&mut *p),
|
|
_ => {
|
|
p.consume();
|
|
p.error("Only bindings are allowed in animations");
|
|
}
|
|
},
|
|
_ => {
|
|
p.consume();
|
|
p.error("Only bindings are allowed in animations");
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
#[cfg_attr(test, parser_test)]
|
|
/// ```test,States
|
|
/// states []
|
|
/// states [ foo when bar : { x:y; } another_state : { x:z; }]
|
|
/// ```
|
|
fn parse_states(p: &mut impl Parser) {
|
|
debug_assert_eq!(p.peek().as_str(), "states");
|
|
let mut p = p.start_node(SyntaxKind::States);
|
|
p.consume(); // "states"
|
|
p.expect(SyntaxKind::LBracket);
|
|
while parse_state(&mut *p) {}
|
|
p.expect(SyntaxKind::RBracket);
|
|
}
|
|
|
|
#[cfg_attr(test, parser_test)]
|
|
/// ```test,State
|
|
/// foo : { x: 1px + 2px; aaa.y: {1px + 2px} }
|
|
/// foo when bar == 1: { color: blue; foo.color: red; }
|
|
/// ```
|
|
fn parse_state(p: &mut impl Parser) -> bool {
|
|
if p.nth(0).kind() != SyntaxKind::Identifier {
|
|
return false;
|
|
}
|
|
let mut p = p.start_node(SyntaxKind::State);
|
|
{
|
|
let mut p = p.start_node(SyntaxKind::DeclaredIdentifier);
|
|
p.expect(SyntaxKind::Identifier);
|
|
}
|
|
if p.peek().as_str() == "when" {
|
|
p.consume();
|
|
parse_expression(&mut *p)
|
|
}
|
|
p.expect(SyntaxKind::Colon);
|
|
if !p.expect(SyntaxKind::LBrace) {
|
|
return false;
|
|
}
|
|
|
|
loop {
|
|
match p.nth(0).kind() {
|
|
SyntaxKind::RBrace => {
|
|
p.consume();
|
|
return true;
|
|
}
|
|
SyntaxKind::Eof => return false,
|
|
_ => {
|
|
let mut p = p.start_node(SyntaxKind::StatePropertyChange);
|
|
parse_qualified_name(&mut *p);
|
|
p.expect(SyntaxKind::Colon);
|
|
parse_binding_expression(&mut *p);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
#[cfg_attr(test, parser_test)]
|
|
/// ```test,Transitions
|
|
/// transitions []
|
|
/// transitions [to checked: {animate x { duration: 88ms; }} out checked: {animate x { duration: 88ms; }}]
|
|
/// ```
|
|
fn parse_transitions(p: &mut impl Parser) {
|
|
debug_assert_eq!(p.peek().as_str(), "transitions");
|
|
let mut p = p.start_node(SyntaxKind::Transitions);
|
|
p.consume(); // "transitions"
|
|
p.expect(SyntaxKind::LBracket);
|
|
while p.nth(0).kind() != SyntaxKind::RBracket && parse_transition(&mut *p) {}
|
|
p.expect(SyntaxKind::RBracket);
|
|
}
|
|
|
|
#[cfg_attr(test, parser_test)]
|
|
/// ```test,Transition
|
|
/// to pressed : {}
|
|
/// to pressed: { animate x { duration: 88ms; } }
|
|
/// out pressed: { animate x { duration: 88ms; } }
|
|
/// ```
|
|
fn parse_transition(p: &mut impl Parser) -> bool {
|
|
if !matches!(p.peek().as_str(), "to" | "out") {
|
|
p.error("Expected 'to' or 'out' to declare a transition");
|
|
return false;
|
|
}
|
|
let mut p = p.start_node(SyntaxKind::Transition);
|
|
p.consume(); // "to" or "out"
|
|
{
|
|
let mut p = p.start_node(SyntaxKind::DeclaredIdentifier);
|
|
p.expect(SyntaxKind::Identifier);
|
|
}
|
|
p.expect(SyntaxKind::Colon);
|
|
if !p.expect(SyntaxKind::LBrace) {
|
|
return false;
|
|
}
|
|
|
|
loop {
|
|
match p.nth(0).kind() {
|
|
SyntaxKind::RBrace => {
|
|
p.consume();
|
|
return true;
|
|
}
|
|
SyntaxKind::Eof => return false,
|
|
SyntaxKind::Identifier if p.peek().as_str() == "animate" => {
|
|
parse_property_animation(&mut *p);
|
|
}
|
|
_ => {
|
|
p.consume();
|
|
p.error("Expected 'animate'");
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
#[cfg_attr(test, parser_test)]
|
|
/// ```test,ExportsList
|
|
/// export { Type }
|
|
/// export { Type, AnotherType }
|
|
/// export { Type as Foo, AnotherType }
|
|
/// ```
|
|
fn parse_export(p: &mut impl Parser) -> bool {
|
|
debug_assert_eq!(p.peek().as_str(), "export");
|
|
let mut p = p.start_node(SyntaxKind::ExportsList);
|
|
p.consume(); // "export"
|
|
if p.test(SyntaxKind::LBrace) {
|
|
loop {
|
|
parse_export_specifier(&mut *p);
|
|
match p.nth(0).kind() {
|
|
SyntaxKind::RBrace => {
|
|
p.consume();
|
|
return true;
|
|
}
|
|
SyntaxKind::Eof => return false,
|
|
SyntaxKind::Comma => {
|
|
p.consume();
|
|
}
|
|
_ => {
|
|
p.consume();
|
|
p.error("Expected comma")
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
return parse_component(&mut *p);
|
|
}
|
|
}
|
|
|
|
#[cfg_attr(test, parser_test)]
|
|
/// ```test,ExportSpecifier
|
|
/// Type
|
|
/// Type as Something
|
|
/// ```
|
|
fn parse_export_specifier(p: &mut impl Parser) -> bool {
|
|
let mut p = p.start_node(SyntaxKind::ExportSpecifier);
|
|
{
|
|
let mut p = p.start_node(SyntaxKind::ExportIdentifier);
|
|
if !p.expect(SyntaxKind::Identifier) {
|
|
return false;
|
|
}
|
|
}
|
|
if p.peek().as_str() == "as" {
|
|
p.consume();
|
|
let mut p = p.start_node(SyntaxKind::ExportName);
|
|
if !p.expect(SyntaxKind::Identifier) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
#[cfg_attr(test, parser_test)]
|
|
/// ```test,ImportSpecifier
|
|
/// import { Type1, Type2 } from "somewhere";
|
|
/// ```
|
|
fn parse_import_specifier(p: &mut impl Parser) -> bool {
|
|
debug_assert_eq!(p.peek().as_str(), "import");
|
|
let mut p = p.start_node(SyntaxKind::ImportSpecifier);
|
|
p.consume(); // "import"
|
|
if !parse_import_identifier_list(&mut *p) {
|
|
return false;
|
|
}
|
|
if p.peek().as_str() != "from" {
|
|
p.error("Expected from keyword for import statement");
|
|
return false;
|
|
}
|
|
if !p.expect(SyntaxKind::Identifier) {
|
|
return false;
|
|
}
|
|
if !p.expect(SyntaxKind::StringLiteral) {
|
|
return false;
|
|
}
|
|
p.expect(SyntaxKind::Semicolon)
|
|
}
|
|
|
|
#[cfg_attr(test, parser_test)]
|
|
/// ```test,ImportIdentifierList
|
|
/// { Type1 }
|
|
/// { Type2, Type3 }
|
|
/// { }
|
|
/// { Type as Alias1, Type as AnotherAlias }
|
|
/// ```
|
|
fn parse_import_identifier_list(p: &mut impl Parser) -> bool {
|
|
let mut p = p.start_node(SyntaxKind::ImportIdentifierList);
|
|
if !p.expect(SyntaxKind::LBrace) {
|
|
return false;
|
|
}
|
|
if p.test(SyntaxKind::RBrace) {
|
|
return true;
|
|
}
|
|
loop {
|
|
parse_import_identifier(&mut *p);
|
|
match p.nth(0).kind() {
|
|
SyntaxKind::RBrace => {
|
|
p.consume();
|
|
return true;
|
|
}
|
|
SyntaxKind::Eof => return false,
|
|
SyntaxKind::Comma => {
|
|
p.consume();
|
|
}
|
|
_ => {
|
|
p.consume();
|
|
p.error("Expected comma")
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
#[cfg_attr(test, parser_test)]
|
|
/// ```test,ImportIdentifier
|
|
/// Type
|
|
/// Type as Alias1
|
|
/// ```
|
|
fn parse_import_identifier(p: &mut impl Parser) -> bool {
|
|
let mut p = p.start_node(SyntaxKind::ImportIdentifier);
|
|
{
|
|
let mut p = p.start_node(SyntaxKind::ExternalName);
|
|
if !p.expect(SyntaxKind::Identifier) {
|
|
return false;
|
|
}
|
|
}
|
|
if p.nth(0).kind() == SyntaxKind::Identifier && p.peek().as_str() == "as" {
|
|
p.consume();
|
|
let mut p = p.start_node(SyntaxKind::InternalName);
|
|
if !p.expect(SyntaxKind::Identifier) {
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|