syntax v2
introduce a new, more ergonomic syntax for haku not all features are implemented just yet. still missing: - custom tags (non-True/False) - color literals - lists
This commit is contained in:
parent
a3e5e8bd10
commit
2595bf0d82
21 changed files with 2844 additions and 1062 deletions
912
crates/haku/src/parser/tests.rs
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912
crates/haku/src/parser/tests.rs
Normal file
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@ -0,0 +1,912 @@
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use alloc::{format, string::String};
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use crate::{
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ast::{dump::dump, Ast, NodeId},
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lexer::{lex, Lexer},
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parser::expr,
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source::SourceCode,
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token::Lexis,
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};
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use super::{toplevel, Parser, ParserLimits};
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fn parse(s: &str, f: fn(&mut Parser)) -> (Ast, NodeId) {
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let mut lexer = Lexer::new(Lexis::new(1024), SourceCode::unlimited_len(s));
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lex(&mut lexer).expect("too many tokens");
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let mut parser = Parser::new(&lexer.lexis, &ParserLimits { max_events: 1024 });
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f(&mut parser);
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if !parser.diagnostics.is_empty() {
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panic!("parser emitted diagnostics: {:#?}", parser.diagnostics);
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}
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let mut ast = Ast::new(1024);
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let (root, _) = parser.into_ast(&mut ast).unwrap();
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(ast, root)
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}
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fn ast(s: &str, f: fn(&mut Parser)) -> String {
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let (ast, root) = parse(s, f);
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// The extra newline is mostly so that it's easier to make the string literals look nice.
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format!("\n{}", dump(&ast, root, None))
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}
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#[track_caller]
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fn assert_ast_eq(s: &str, f: fn(&mut Parser), ast_s: &str) {
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let got = ast(s, f);
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if ast_s != got {
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panic!("AST mismatch. expected:\n{ast_s}\n\ngot:\n{got}\n");
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}
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}
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#[test]
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fn one_literals() {
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assert_ast_eq(
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"1",
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expr,
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"
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Number @ 0..1
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Token @ 0..1",
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);
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assert_ast_eq(
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"ExampleTag123",
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expr,
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"
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Tag @ 0..13
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Token @ 0..13",
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);
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assert_ast_eq(
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"example_ident123",
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expr,
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"
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Ident @ 0..16
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Token @ 0..16",
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);
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assert_ast_eq(
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"#000",
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expr,
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"
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Color @ 0..4
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Token @ 0..4",
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);
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assert_ast_eq(
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"#000F",
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expr,
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"
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Color @ 0..5
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Token @ 0..5",
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);
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assert_ast_eq(
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"#058EF0",
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expr,
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"
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Color @ 0..7
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Token @ 0..7",
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);
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assert_ast_eq(
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"#058EF0FF",
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expr,
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"
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Color @ 0..9
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Token @ 0..9",
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);
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}
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#[test]
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fn list() {
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assert_ast_eq(
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"[]",
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expr,
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"
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List @ 0..2
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Token @ 0..1
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Token @ 1..2",
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);
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assert_ast_eq(
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"[1]",
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expr,
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"
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List @ 0..3
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Token @ 0..1
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Number @ 1..2
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Token @ 1..2
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Token @ 2..3",
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);
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assert_ast_eq(
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"[1, 2]",
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expr,
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"
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List @ 0..6
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Token @ 0..1
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Number @ 1..2
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Token @ 1..2
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Token @ 2..3
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Number @ 4..5
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Token @ 4..5
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Token @ 5..6",
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);
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assert_ast_eq(
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"[
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1
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2
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]",
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expr,
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"
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List @ 0..42
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Token @ 0..1
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Token @ 1..2
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Number @ 15..16
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Token @ 15..16
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Token @ 16..17
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Number @ 30..31
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Token @ 30..31
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Token @ 31..32
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Token @ 41..42",
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);
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}
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#[test]
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fn unary() {
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assert_ast_eq(
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"-1",
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expr,
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"
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Unary @ 0..2
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Op @ 0..1
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Token @ 0..1
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Number @ 1..2
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Token @ 1..2",
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);
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assert_ast_eq(
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"!1",
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expr,
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"
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Unary @ 0..2
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Op @ 0..1
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Token @ 0..1
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Number @ 1..2
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Token @ 1..2",
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);
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}
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#[test]
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fn binary_single() {
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assert_ast_eq(
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"1 + 1",
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expr,
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"
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Binary @ 0..5
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Number @ 0..1
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Token @ 0..1
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Op @ 2..3
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Token @ 2..3
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Number @ 4..5
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Token @ 4..5",
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);
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assert_ast_eq(
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"1 - 1",
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expr,
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"
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Binary @ 0..5
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Number @ 0..1
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Token @ 0..1
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Op @ 2..3
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Token @ 2..3
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Number @ 4..5
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Token @ 4..5",
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);
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assert_ast_eq(
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"1 * 1",
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expr,
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"
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Binary @ 0..5
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Number @ 0..1
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Token @ 0..1
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Op @ 2..3
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Token @ 2..3
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Number @ 4..5
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Token @ 4..5",
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);
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assert_ast_eq(
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"1 / 1",
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expr,
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"
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Binary @ 0..5
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Number @ 0..1
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Token @ 0..1
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Op @ 2..3
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Token @ 2..3
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Number @ 4..5
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Token @ 4..5",
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);
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assert_ast_eq(
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"1 < 1",
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expr,
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"
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Binary @ 0..5
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Number @ 0..1
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Token @ 0..1
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Op @ 2..3
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Token @ 2..3
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Number @ 4..5
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Token @ 4..5",
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);
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assert_ast_eq(
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"1 > 1",
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expr,
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"
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Binary @ 0..5
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Number @ 0..1
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Token @ 0..1
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Op @ 2..3
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Token @ 2..3
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Number @ 4..5
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Token @ 4..5",
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);
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assert_ast_eq(
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"1 == 1",
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expr,
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"
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Binary @ 0..6
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Number @ 0..1
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Token @ 0..1
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Op @ 2..4
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Token @ 2..4
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Number @ 5..6
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Token @ 5..6",
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);
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assert_ast_eq(
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"1 != 1",
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expr,
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"
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Binary @ 0..6
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Number @ 0..1
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Token @ 0..1
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Op @ 2..4
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Token @ 2..4
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Number @ 5..6
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Token @ 5..6",
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);
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assert_ast_eq(
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"1 <= 1",
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expr,
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"
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Binary @ 0..6
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Number @ 0..1
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Token @ 0..1
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Op @ 2..4
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Token @ 2..4
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Number @ 5..6
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Token @ 5..6",
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);
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assert_ast_eq(
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"1 >= 1",
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expr,
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"
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Binary @ 0..6
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Number @ 0..1
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Token @ 0..1
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Op @ 2..4
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Token @ 2..4
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Number @ 5..6
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Token @ 5..6",
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);
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assert_ast_eq(
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"1 = 1",
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expr,
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"
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Binary @ 0..5
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Number @ 0..1
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Token @ 0..1
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Op @ 2..3
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Token @ 2..3
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Number @ 4..5
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Token @ 4..5",
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);
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}
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#[test]
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fn binary_precedence() {
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assert_ast_eq(
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"1 + 1 + 1",
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expr,
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"
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Binary @ 0..9
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Binary @ 0..5
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Number @ 0..1
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Token @ 0..1
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Op @ 2..3
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Token @ 2..3
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Number @ 4..5
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Token @ 4..5
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Op @ 6..7
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Token @ 6..7
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Number @ 8..9
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Token @ 8..9",
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);
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assert_ast_eq(
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"1 * 1 + 1",
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expr,
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"
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Binary @ 0..9
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Binary @ 0..5
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Number @ 0..1
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Token @ 0..1
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Op @ 2..3
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Token @ 2..3
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Number @ 4..5
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Token @ 4..5
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Op @ 6..7
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Token @ 6..7
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Number @ 8..9
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Token @ 8..9",
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);
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assert_ast_eq(
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"1 + 1 * 1",
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expr,
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"
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Binary @ 0..9
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Number @ 0..1
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Token @ 0..1
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Op @ 2..3
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Token @ 2..3
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Binary @ 4..9
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Number @ 4..5
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Token @ 4..5
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Op @ 6..7
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Token @ 6..7
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Number @ 8..9
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Token @ 8..9",
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);
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assert_ast_eq(
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"1 < 1 + 1",
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expr,
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"
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Binary @ 0..9
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Number @ 0..1
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Token @ 0..1
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Op @ 2..3
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Token @ 2..3
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Binary @ 4..9
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Number @ 4..5
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Token @ 4..5
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Op @ 6..7
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Token @ 6..7
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Number @ 8..9
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Token @ 8..9",
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);
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assert_ast_eq(
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"1 + 1 < 1",
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expr,
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"
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Binary @ 0..9
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Binary @ 0..5
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Number @ 0..1
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Token @ 0..1
|
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Op @ 2..3
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Token @ 2..3
|
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Number @ 4..5
|
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Token @ 4..5
|
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Op @ 6..7
|
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Token @ 6..7
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Number @ 8..9
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Token @ 8..9",
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);
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|
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assert_ast_eq(
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"1 + 1 * 1 < 1",
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expr,
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"
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Binary @ 0..13
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Binary @ 0..9
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Number @ 0..1
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Token @ 0..1
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Op @ 2..3
|
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Token @ 2..3
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Binary @ 4..9
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Number @ 4..5
|
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Token @ 4..5
|
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Op @ 6..7
|
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Token @ 6..7
|
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Number @ 8..9
|
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Token @ 8..9
|
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Op @ 10..11
|
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Token @ 10..11
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Number @ 12..13
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Token @ 12..13",
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);
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|
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assert_ast_eq(
|
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"1 * 1 + 1 < 1",
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expr,
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"
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Binary @ 0..13
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Binary @ 0..9
|
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Binary @ 0..5
|
||||
Number @ 0..1
|
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Token @ 0..1
|
||||
Op @ 2..3
|
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Token @ 2..3
|
||||
Number @ 4..5
|
||||
Token @ 4..5
|
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Op @ 6..7
|
||||
Token @ 6..7
|
||||
Number @ 8..9
|
||||
Token @ 8..9
|
||||
Op @ 10..11
|
||||
Token @ 10..11
|
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Number @ 12..13
|
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Token @ 12..13",
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);
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}
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|
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#[test]
|
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fn binary_cont() {
|
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assert_ast_eq(
|
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"1 +
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1",
|
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expr,
|
||||
"
|
||||
Binary @ 0..16
|
||||
Number @ 0..1
|
||||
Token @ 0..1
|
||||
Op @ 2..3
|
||||
Token @ 2..3
|
||||
Token @ 3..4
|
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Number @ 15..16
|
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Token @ 15..16",
|
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);
|
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|
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assert_ast_eq(
|
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"1 +
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|
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1",
|
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expr,
|
||||
"
|
||||
Binary @ 0..17
|
||||
Number @ 0..1
|
||||
Token @ 0..1
|
||||
Op @ 2..3
|
||||
Token @ 2..3
|
||||
Token @ 3..4
|
||||
Number @ 16..17
|
||||
Token @ 16..17",
|
||||
);
|
||||
}
|
||||
|
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#[test]
|
||||
fn paren_empty() {
|
||||
assert_ast_eq(
|
||||
"()",
|
||||
expr,
|
||||
"
|
||||
ParenEmpty @ 0..2
|
||||
Token @ 0..1
|
||||
Token @ 1..2",
|
||||
);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn paren() {
|
||||
assert_ast_eq(
|
||||
"(1)",
|
||||
expr,
|
||||
"
|
||||
Paren @ 0..3
|
||||
Token @ 0..1
|
||||
Number @ 1..2
|
||||
Token @ 1..2
|
||||
Token @ 2..3",
|
||||
);
|
||||
|
||||
assert_ast_eq(
|
||||
"(1 + 1) * 1",
|
||||
expr,
|
||||
"
|
||||
Binary @ 0..11
|
||||
Paren @ 0..7
|
||||
Token @ 0..1
|
||||
Binary @ 1..6
|
||||
Number @ 1..2
|
||||
Token @ 1..2
|
||||
Op @ 3..4
|
||||
Token @ 3..4
|
||||
Number @ 5..6
|
||||
Token @ 5..6
|
||||
Token @ 6..7
|
||||
Op @ 8..9
|
||||
Token @ 8..9
|
||||
Number @ 10..11
|
||||
Token @ 10..11",
|
||||
);
|
||||
|
||||
assert_ast_eq(
|
||||
"1 * (1 + 1)",
|
||||
expr,
|
||||
"
|
||||
Binary @ 0..11
|
||||
Number @ 0..1
|
||||
Token @ 0..1
|
||||
Op @ 2..3
|
||||
Token @ 2..3
|
||||
Paren @ 4..11
|
||||
Token @ 4..5
|
||||
Binary @ 5..10
|
||||
Number @ 5..6
|
||||
Token @ 5..6
|
||||
Op @ 7..8
|
||||
Token @ 7..8
|
||||
Number @ 9..10
|
||||
Token @ 9..10
|
||||
Token @ 10..11",
|
||||
);
|
||||
|
||||
assert_ast_eq(
|
||||
"(
|
||||
1 +
|
||||
1
|
||||
)",
|
||||
expr,
|
||||
"
|
||||
Paren @ 0..47
|
||||
Token @ 0..1
|
||||
Token @ 1..2
|
||||
Binary @ 15..33
|
||||
Number @ 15..16
|
||||
Token @ 15..16
|
||||
Op @ 17..18
|
||||
Token @ 17..18
|
||||
Token @ 18..19
|
||||
Number @ 32..33
|
||||
Token @ 32..33
|
||||
Token @ 36..37
|
||||
Token @ 46..47",
|
||||
);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn infix_call() {
|
||||
assert_ast_eq(
|
||||
"f x y",
|
||||
toplevel,
|
||||
"
|
||||
Toplevel @ 0..5
|
||||
Call @ 0..5
|
||||
Ident @ 0..1
|
||||
Token @ 0..1
|
||||
Ident @ 2..3
|
||||
Token @ 2..3
|
||||
Ident @ 4..5
|
||||
Token @ 4..5",
|
||||
);
|
||||
|
||||
assert_ast_eq(
|
||||
"sin 1 + cos 2",
|
||||
toplevel,
|
||||
"
|
||||
Toplevel @ 0..13
|
||||
Binary @ 0..13
|
||||
Call @ 0..5
|
||||
Ident @ 0..3
|
||||
Token @ 0..3
|
||||
Number @ 4..5
|
||||
Token @ 4..5
|
||||
Op @ 6..7
|
||||
Token @ 6..7
|
||||
Call @ 8..13
|
||||
Ident @ 8..11
|
||||
Token @ 8..11
|
||||
Number @ 12..13
|
||||
Token @ 12..13",
|
||||
);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn infix_call_unary_arg() {
|
||||
assert_ast_eq(
|
||||
// NOTE: The whitespace here is misleading.
|
||||
// This is a binary `-`.
|
||||
"f -1",
|
||||
toplevel,
|
||||
"
|
||||
Toplevel @ 0..4
|
||||
Binary @ 0..4
|
||||
Ident @ 0..1
|
||||
Token @ 0..1
|
||||
Op @ 2..3
|
||||
Token @ 2..3
|
||||
Number @ 3..4
|
||||
Token @ 3..4",
|
||||
);
|
||||
|
||||
assert_ast_eq(
|
||||
"f (-1)",
|
||||
toplevel,
|
||||
"
|
||||
Toplevel @ 0..6
|
||||
Call @ 0..6
|
||||
Ident @ 0..1
|
||||
Token @ 0..1
|
||||
Paren @ 2..6
|
||||
Token @ 2..3
|
||||
Unary @ 3..5
|
||||
Op @ 3..4
|
||||
Token @ 3..4
|
||||
Number @ 4..5
|
||||
Token @ 4..5
|
||||
Token @ 5..6",
|
||||
);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn lambda() {
|
||||
assert_ast_eq(
|
||||
r#" \_ -> () "#,
|
||||
toplevel,
|
||||
"
|
||||
Toplevel @ 1..9
|
||||
Lambda @ 1..9
|
||||
Token @ 1..2
|
||||
Params @ 2..3
|
||||
Param @ 2..3
|
||||
Token @ 2..3
|
||||
Token @ 4..6
|
||||
ParenEmpty @ 7..9
|
||||
Token @ 7..8
|
||||
Token @ 8..9",
|
||||
);
|
||||
|
||||
assert_ast_eq(
|
||||
r#" \x -> x "#,
|
||||
toplevel,
|
||||
"
|
||||
Toplevel @ 1..8
|
||||
Lambda @ 1..8
|
||||
Token @ 1..2
|
||||
Params @ 2..3
|
||||
Param @ 2..3
|
||||
Token @ 2..3
|
||||
Token @ 4..6
|
||||
Ident @ 7..8
|
||||
Token @ 7..8",
|
||||
);
|
||||
|
||||
assert_ast_eq(
|
||||
r#" \x, y -> x + y "#,
|
||||
toplevel,
|
||||
"
|
||||
Toplevel @ 1..15
|
||||
Lambda @ 1..15
|
||||
Token @ 1..2
|
||||
Params @ 2..6
|
||||
Param @ 2..3
|
||||
Token @ 2..3
|
||||
Token @ 3..4
|
||||
Param @ 5..6
|
||||
Token @ 5..6
|
||||
Token @ 7..9
|
||||
Binary @ 10..15
|
||||
Ident @ 10..11
|
||||
Token @ 10..11
|
||||
Op @ 12..13
|
||||
Token @ 12..13
|
||||
Ident @ 14..15
|
||||
Token @ 14..15",
|
||||
);
|
||||
|
||||
assert_ast_eq(
|
||||
r#" \x, y ->
|
||||
x + y "#,
|
||||
toplevel,
|
||||
"
|
||||
Toplevel @ 1..29
|
||||
Lambda @ 1..29
|
||||
Token @ 1..2
|
||||
Params @ 2..6
|
||||
Param @ 2..3
|
||||
Token @ 2..3
|
||||
Token @ 3..4
|
||||
Param @ 5..6
|
||||
Token @ 5..6
|
||||
Token @ 7..9
|
||||
Token @ 9..10
|
||||
Binary @ 24..29
|
||||
Ident @ 24..25
|
||||
Token @ 24..25
|
||||
Op @ 26..27
|
||||
Token @ 26..27
|
||||
Ident @ 28..29
|
||||
Token @ 28..29",
|
||||
);
|
||||
|
||||
assert_ast_eq(
|
||||
r#" f \x -> g \y -> x + y "#,
|
||||
toplevel,
|
||||
"
|
||||
Toplevel @ 1..22
|
||||
Call @ 1..22
|
||||
Ident @ 1..2
|
||||
Token @ 1..2
|
||||
Lambda @ 3..22
|
||||
Token @ 3..4
|
||||
Params @ 4..5
|
||||
Param @ 4..5
|
||||
Token @ 4..5
|
||||
Token @ 6..8
|
||||
Call @ 9..22
|
||||
Ident @ 9..10
|
||||
Token @ 9..10
|
||||
Lambda @ 11..22
|
||||
Token @ 11..12
|
||||
Params @ 12..13
|
||||
Param @ 12..13
|
||||
Token @ 12..13
|
||||
Token @ 14..16
|
||||
Binary @ 17..22
|
||||
Ident @ 17..18
|
||||
Token @ 17..18
|
||||
Op @ 19..20
|
||||
Token @ 19..20
|
||||
Ident @ 21..22
|
||||
Token @ 21..22",
|
||||
);
|
||||
|
||||
assert_ast_eq(
|
||||
r#" f \x ->
|
||||
g \y ->
|
||||
x + y "#,
|
||||
toplevel,
|
||||
"
|
||||
Toplevel @ 1..48
|
||||
Call @ 1..48
|
||||
Ident @ 1..2
|
||||
Token @ 1..2
|
||||
Lambda @ 3..48
|
||||
Token @ 3..4
|
||||
Params @ 4..5
|
||||
Param @ 4..5
|
||||
Token @ 4..5
|
||||
Token @ 6..8
|
||||
Token @ 8..9
|
||||
Call @ 21..48
|
||||
Ident @ 21..22
|
||||
Token @ 21..22
|
||||
Lambda @ 23..48
|
||||
Token @ 23..24
|
||||
Params @ 24..25
|
||||
Param @ 24..25
|
||||
Token @ 24..25
|
||||
Token @ 26..28
|
||||
Token @ 28..29
|
||||
Binary @ 43..48
|
||||
Ident @ 43..44
|
||||
Token @ 43..44
|
||||
Op @ 45..46
|
||||
Token @ 45..46
|
||||
Ident @ 47..48
|
||||
Token @ 47..48",
|
||||
);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn if_expr() {
|
||||
assert_ast_eq(
|
||||
r#" if (true) 1 else 2 "#,
|
||||
toplevel,
|
||||
"
|
||||
Toplevel @ 1..19
|
||||
If @ 1..19
|
||||
Token @ 1..3
|
||||
Token @ 4..5
|
||||
Ident @ 5..9
|
||||
Token @ 5..9
|
||||
Token @ 9..10
|
||||
Number @ 11..12
|
||||
Token @ 11..12
|
||||
Token @ 13..17
|
||||
Number @ 18..19
|
||||
Token @ 18..19",
|
||||
);
|
||||
|
||||
assert_ast_eq(
|
||||
r#" if (true)
|
||||
1
|
||||
else
|
||||
2 "#,
|
||||
toplevel,
|
||||
"
|
||||
Toplevel @ 1..63
|
||||
If @ 1..63
|
||||
Token @ 1..3
|
||||
Token @ 4..5
|
||||
Ident @ 5..9
|
||||
Token @ 5..9
|
||||
Token @ 9..10
|
||||
Token @ 10..11
|
||||
Number @ 27..28
|
||||
Token @ 27..28
|
||||
Token @ 28..29
|
||||
Token @ 41..45
|
||||
Token @ 45..46
|
||||
Number @ 62..63
|
||||
Token @ 62..63",
|
||||
);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn let_expr() {
|
||||
assert_ast_eq(
|
||||
r#" let x = 1
|
||||
x "#,
|
||||
toplevel,
|
||||
"
|
||||
Toplevel @ 1..24
|
||||
Let @ 1..24
|
||||
Token @ 1..4
|
||||
Ident @ 5..6
|
||||
Token @ 5..6
|
||||
Token @ 7..8
|
||||
Number @ 9..10
|
||||
Token @ 9..10
|
||||
Token @ 10..11
|
||||
Ident @ 23..24
|
||||
Token @ 23..24",
|
||||
);
|
||||
|
||||
assert_ast_eq(
|
||||
r#" let x = 1
|
||||
let y = 2
|
||||
x + y "#,
|
||||
toplevel,
|
||||
"
|
||||
Toplevel @ 1..50
|
||||
Let @ 1..50
|
||||
Token @ 1..4
|
||||
Ident @ 5..6
|
||||
Token @ 5..6
|
||||
Token @ 7..8
|
||||
Number @ 9..10
|
||||
Token @ 9..10
|
||||
Token @ 10..11
|
||||
Let @ 23..50
|
||||
Token @ 23..26
|
||||
Ident @ 27..28
|
||||
Token @ 27..28
|
||||
Token @ 29..30
|
||||
Number @ 31..32
|
||||
Token @ 31..32
|
||||
Token @ 32..33
|
||||
Binary @ 45..50
|
||||
Ident @ 45..46
|
||||
Token @ 45..46
|
||||
Op @ 47..48
|
||||
Token @ 47..48
|
||||
Ident @ 49..50
|
||||
Token @ 49..50",
|
||||
)
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue