Traceability Matrix

Each requirement paragraph in the Language Specification, the SC API Reference, and the other chapters of this manual carries a unique identifier, shown as a [sls.…] badge at the end of the paragraph. A test case declares which requirements it verifies by listing their identifiers in //#sls.… comments. This matrix lists every requirement paragraph with the test cases that declare it. Requirements not yet covered by any test are marked ❌. Informative paragraphs — those whose identifier contains a meta segment, and examples — are not listed; the examples are compiled by the doctests test instead.

Tests marked case: are executed test cases from api/slint-sc/tests/cases/, syntax: are compiler syntax tests from internal/compiler/tests/syntax/slint-sc/, and rust: are Rust unit tests and test drivers of the slint-sc crate and the compiler.

Coverage: 96 of 96 requirement paragraphs are covered by at least one test.

Slint Language Specification

Source Files

Paragraph	Tests
`sls.source.encoding.utf8`	`syntax: bom-encoding.slint` ↗
`sls.source.encoding.bom`	`syntax: bom-encoding.slint` ↗
`sls.source.line-terminators`	`syntax: crlf-line-terminators.slint` ↗
`sls.source.bare-cr`	`syntax: crlf-line-terminators.slint` ↗
`sls.source.whitespace.collapse`	`syntax: whitespace.slint` ↗
`sls.source.comment.line`	`case: lexical/with_comments.slint` ↗ `syntax: comments.slint` ↗
`sls.source.comment.block`	`case: lexical/with_comments.slint` ↗ `syntax: comments.slint` ↗
`sls.source.comment.whitespace-equivalent`	`case: lexical/with_comments.slint` ↗ `syntax: comments.slint` ↗
`sls.source.comment.no-doc-comments`	`syntax: comments.slint` ↗

Lexical Structure

Paragraph	Tests
`sls.lex.tokens`	`rust: lexer.rs` ↗
`sls.lex.number`	`rust: lexer.rs` ↗
`sls.lex.identifier.classes`	`case: lexical/unicode_identifiers.slint` ↗ `rust: lexer.rs` ↗
`sls.lex.identifier.no-leading-digit`	`rust: lexer.rs` ↗
`sls.lex.identifier.no-leading-hyphen`	`syntax: identifier_leading_hyphen.slint` ↗ `syntax: identifier_leading_hyphen_element_id.slint` ↗ `syntax: identifier_leading_hyphen_inherits.slint` ↗ `syntax: identifier_leading_hyphen_property.slint` ↗ `rust: lexer.rs` ↗
`sls.lex.identifier.normalization`	`syntax: identifier_normalization_collision.slint` ↗ `syntax: identifier_normalization_distinct.slint` ↗
`sls.lex.identifier.normalization-example`	`syntax: identifier_normalization_collision.slint` ↗
`sls.lex.identifier.canonical-form`	`syntax: identifier_normalization_collision.slint` ↗
`sls.lex.contextual-keywords`	`case: lexical/contextual_keywords.slint` ↗ `syntax: contextual_keywords.slint` ↗

File Structure

Paragraph	Tests
`sls.file.source-file`	`syntax: source_file.slint` ↗
`sls.file.source-file.empty`	`syntax: empty_file.slint` ↗
`sls.file.top-level-item`	`syntax: enums.slint` ↗ `syntax: globals.slint` ↗ `syntax: source_file.slint` ↗ `syntax: structs.slint` ↗
`sls.file.component.definition-forms`	`case: component/user_component.slint` ↗
`sls.file.component.name`	`case: component/name.slint` ↗
`sls.file.component.inherits`	`case: component/inherits.slint` ↗
`sls.file.component.inherits.meaning`	`case: component/component_inheritance.slint` ↗
`sls.file.component.inherits.body-applies`	`case: component/inherits.slint` ↗
`sls.file.component.inherits.properties`	`case: component/inherits.slint` ↗
`sls.file.component.inherits.base`	`case: component/component_inheritance.slint` ↗ `syntax: inherits_not_yet_defined.slint` ↗ `syntax: inherits_unknown.slint` ↗
`sls.file.component.body-braces`	`syntax: component_braces_close.slint` ↗ `syntax: component_braces_open.slint` ↗
`sls.file.component.body`	`case: component/nested_rectangles.slint` ↗ `syntax: bindings.slint` ↗ `syntax: element_nesting.slint` ↗ `syntax: for_and_if.slint` ↗
`sls.file.component.body.empty`	`case: component/empty.slint` ↗
`sls.file.element.instantiation-form`	`case: component/nested_rectangles.slint` ↗ `syntax: element_nesting.slint` ↗
`sls.file.element.instantiation-typename`	`case: component/user_component.slint` ↗ `syntax: element_unknown_type.slint` ↗
`sls.file.element.no-window-instantiation`	`syntax: window_instantiation.slint` ↗
`sls.file.element.body`	`case: component/background_color.slint` ↗ `case: component/nested_rectangles.slint` ↗ `syntax: element_nesting.slint` ↗
`sls.file.element.tree`	`case: component/nested_rectangles.slint` ↗ `syntax: element_nesting.slint` ↗

Exports

Paragraph	Tests
`sls.export.placement`	`case: export/placement.slint` ↗
`sls.export.default-private`	`case: export/lists.slint` ↗
`sls.export.forms`	`case: export/lists.slint` ↗
`sls.export.declaration-site`	`case: component/empty.slint` ↗
`sls.export.list`	`case: export/lists.slint` ↗
`sls.export.rename`	`case: export/lists.slint` ↗
`sls.export.left-must-exist`	`syntax: export_specifiers.slint` ↗
`sls.export.no-duplicates`	`case: export/lists.slint` ↗ `syntax: export_duplicate.slint` ↗

Properties

Paragraph	Tests
`sls.prop.def`	`case: component/inherits.slint` ↗
`sls.prop.def.value`	`case: component/properties.slint` ↗
`sls.prop.decl.form`	`case: component/properties.slint` ↗ `syntax: properties.slint` ↗
`sls.prop.decl.visibility`	`syntax: properties.slint` ↗ `syntax: property_protected.slint` ↗
`sls.prop.decl.in`	`case: component/properties.slint` ↗
`sls.prop.decl.out`	`case: component/properties.slint` ↗
`sls.prop.decl.in-out`	`case: component/properties.slint` ↗
`sls.prop.decl.private`	`case: component/properties.slint` ↗
`sls.prop.decl.root-only`	`syntax: properties.slint` ↗
`sls.prop.decl.types`	`syntax: properties.slint` ↗
`sls.prop.decl.default`	`case: component/properties.slint` ↗

Bindings

Paragraph	Tests
`sls.binding.form`	`case: component/background_color.slint` ↗ `syntax: color_literals.slint` ↗
`sls.binding.target-must-exist`	`syntax: bindings.slint` ↗
`sls.type.conversions`	`syntax: binding_types.slint` ↗
`sls.binding.type`	`syntax: binding_types.slint` ↗

Expressions

Paragraph	Tests
`sls.expr.forms`	`syntax: bindings.slint` ↗
`sls.expr.color.forms`	`syntax: color_literals.slint` ↗
`sls.expr.color.channels`	`case: expr/color_literals.slint` ↗
`sls.expr.color.short-forms`	`case: expr/color_literals.slint` ↗
`sls.expr.color.type`	`syntax: color_literals.slint` ↗
`sls.expr.length.form`	`case: component/rectangle_position.slint` ↗ `syntax: length_literal_space.slint` ↗ `syntax: units.slint` ↗
`sls.expr.length.integral`	`syntax: units.slint` ↗
`sls.expr.length.px-only`	`syntax: units.slint` ↗
`sls.expr.length.type`	`case: component/rectangle_position.slint` ↗

Geometry

Paragraph	Tests
`sls.geom.properties`	`syntax: units.slint` ↗
`sls.geom.relative`	`case: component/rectangle_nesting.slint` ↗
`sls.geom.window.root`	`case: component/rectangle_position.slint` ↗ `syntax: geometry_root.slint` ↗
`sls.geom.window`	`syntax: elements.slint` ↗
`sls.geom.default-position`	`case: component/baseless_implicit_size.slint` ↗ `case: component/rectangle_centered.slint` ↗ `case: component/rectangle_nesting.slint` ↗
`sls.geom.default-size`	`case: component/rectangle_nesting.slint` ↗

Colors and Brushes

Paragraph	Tests
`sls.type.color`	`case: component/properties.slint` ↗
`sls.type.brush`	`case: component/rectangle_position.slint` ↗
`sls.type.convert.color-to-brush`	`case: component/rectangle_position.slint` ↗ `syntax: binding_types.slint` ↗

Primitive & Numeric Types

Paragraph	Tests
`sls.type.length`	`case: component/properties.slint` ↗ `case: component/rectangle_position.slint` ↗

SC API Reference

Rectangle

Paragraph	Tests
`sls.ref.rectangle.background`	`case: component/rectangle_position.slint` ↗
`sls.ref.rectangle.empty`	`case: component/rectangle_position.slint` ↗

Window

Paragraph	Tests
`sls.ref.window.background`	`case: component/rectangle_position.slint` ↗

Safety Manual

Generated Code

Paragraph	Tests
`sls.gen.output`	`rust: tests/driver.rs` ↗
`sls.gen.component`	`case: component/empty.slint` ↗ `case: component/name.slint` ↗ `case: component/user_component.slint` ↗
`sls.gen.window-root`	`syntax: window_root.slint` ↗
`sls.gen.new`	`case: component/empty.slint` ↗
`sls.gen.render-rgb8`	`case: component/window_background.slint` ↗
`sls.gen.render-error`	`case: component/window_background.slint` ↗
`sls.gen.prop.names`	`case: component/properties.slint` ↗
`sls.gen.prop.get`	`case: component/properties.slint` ↗
`sls.gen.prop.set`	`case: component/properties.slint` ↗
`sls.gen.prop.types`	`case: component/properties.slint` ↗

Rendering

Paragraph	Tests
`sls.paint.invocation`	`case: component/window_background.slint` ↗
`sls.paint.model`	`case: component/rectangle_nesting.slint` ↗ `case: component/rectangle_position.slint` ↗
`sls.paint.order`	`case: component/rectangle_nesting.slint` ↗
`sls.paint.clip`	`case: component/rectangle_nesting.slint` ↗ `case: component/rectangle_wider_than_window.slint` ↗
`sls.paint.no-parent-clip`	`case: component/rectangle_nesting.slint` ↗