microcad-lang-parse 0.5.0

µcad language syntax lexer and parser
Documentation 
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// Copyright © 2026 The µcad authors <info@microcad.xyz>
// SPDX-License-Identifier: AGPL-3.0-or-later

#![allow(missing_docs)]

use insta::assert_debug_snapshot;
use microcad_lang_parse::tokens::lex;
use test_case::test_case;

#[test_case("single int", "1")]
#[test_case("simple float", "1.1")]
#[test_case("leading dot", ".1")]
#[test_case("trailing dot", "1.")]
#[test_case("int range", "1..3")]
#[test_case("exp", ".1e-3 .1e+3 .1e3 1.e3 1.2e3 1e3")]
#[test_case("basic addition", "1 + 1")]
#[test_case("basic addition, no space", "1+1")]
#[test_case("assignment", "a = b * 2")]
#[test_case("plain string", r#""plain string""#)]
#[test_case("empty string", r#"a = """#)]
#[test_case("plain string in expr", r#"a = "plain string int expression" + 1"#)]
#[test_case(
    "multi-line string",
    r#""plain
    string""#
)]
#[test_case("escaped bracket string", r#""string {{ with }} escaped bracket""#)]
#[test_case("escaped quote string", r#""string \" with \" escaped \ quotes""#)]
#[test_case("basic expr string", r#""string {with} expression""#)]
#[test_case("expr string", r#""string {more + complex} expression""#)]
#[test_case(
    "formatted expr string",
    r#""string {formated - expression:03.5} expression""#
)]
#[test_case("function", "fn(a: Length) -> Length {a * 2}")]
#[test_case("comment", "a = 1 // comment")]
#[test_case(
    "multiple comment",
    "// comment1
    // comment2"
)]
#[test_case(
    "multi line comment",
    r#"a = 1; /** multi
    line
    comment
    */
    b = 2;"#
)]
#[test_case(
    "doc comment",
    r#"/// Doc comment
    part Foo() {
        Cylinder(height = 10mm, radius = 5mm);
    }"#
)]
#[test_case(
    "inner doc comment",
    r#"//! Doc comment1
    //! Doc comment2
    "#
)]
#[test_case("invalid expr string", r#"a = "string {broken"; b = 1"#)]
#[test_case("invalid expr string format", r#"a = "string {broken:"; b = 1"#)]
#[test_case(
    "unclosed string",
    r#"a = "unclosed string;
    b = 1"#
)]
#[test_case("percent unit", "1%")]
#[test_case("units", r#"1% + 2mm / 3mm2 - 4mm³ * 1° + 1" - 2'"#; "units")]
#[test_case("array binops", r#"[1,2]" == [1,2]cm"#)]
#[test_case("tuple access", r##"foo.bar"##)]
#[test_case("array range units", "a = [1..3]mm;")]
fn test_lexer(name: &str, input: &str) {
    assert_debug_snapshot!(format!("lexer_{name}"), lex(input).collect::<Vec<_>>());
}