Module: Jade::Frontend::SemanticAnalysis::Helper

Included in:
Assign, Body, CaseOf, CaseOfBranch, CharLiteral, ConstructorReference, FunctionCall, FunctionDeclaration, Grouping, IfThenElse, Implementation, ImplementationFunction, ImportDeclaration, InterfaceDeclaration, InteropImportDeclaration, KeyedCall, Lambda, List, Literal, MemberAccess, ModuleNode, PatternBinding, PatternConstructor, PatternList, PatternLiteral, PatternRecord, PatternWildcard, QualifiedAccess, RecordAccess, RecordField, RecordLiteral, RecordUpdate, StructDeclaration, Tuple, TypeDeclaration, VariableReference, VariantDeclaration
Defined in:
lib/jade/frontend/semantic_analysis/helper.rb

Instance Method Summary collapse

Instance Method Details

#analyze_duplicate_fields(fields, entry) ⇒ Object 



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# File 'lib/jade/frontend/semantic_analysis/helper.rb', line 52

def analyze_duplicate_fields(fields, entry)
  fields
    .group_by(&:key)
    .select { |_, v| v.size > 1 }
    .map do |k, v|
      first, *rest = v
      Error::DuplicateRecordField
        .new(entry.name, first.range, field_name: k, duplicate_spans: rest.map(&:range))
    end
end

#analyze_in_parallel(nodes, registry, scope, entry) ⇒ Object

Independent: every child analyzed with the input scope; the returned scope is the input scope (no bindings leak). Use when children don’t see each other — record fields, list items, function-call args, if/case branches.



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# File 'lib/jade/frontend/semantic_analysis/helper.rb', line 47

def analyze_in_parallel(nodes, registry, scope, entry)
  results = nodes.map { analyze_node(it, registry, scope, entry) }
  Result[results.map(&:node), results.flat_map(&:errors), scope]
end

#analyze_in_sequence(nodes, registry, scope, entry) ⇒ Object

Threaded: child N analyzed with the scope produced by child N-1; the returned scope is the last child’s. Use when later siblings depend on bindings introduced by earlier ones — body statements, lambda/function params, sequential pattern bindings.



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# File 'lib/jade/frontend/semantic_analysis/helper.rb', line 36

def analyze_in_sequence(nodes, registry, scope, entry)
  nodes.reduce(Result[[], [], scope]) do |acc, node|
    r = analyze_node(node, registry, acc.scope, entry)
    Result[acc.node + [r.node], acc.errors + r.errors, r.scope]
  end
end

#analyze_node(node, registry, scope, entry) ⇒ Object 



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# File 'lib/jade/frontend/semantic_analysis/helper.rb', line 5

def analyze_node(node, registry, scope, entry)
  SemanticAnalysis.send(:analyze_node, node, registry, scope, entry)
end

#bind(scope, symbol, entry) ⇒ Object 



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# File 'lib/jade/frontend/semantic_analysis/helper.rb', line 9

def bind(scope, symbol, entry)
  name = symbol.name
  if scope.lookup(name)
    Error::ShadowingError
      .new(entry.name, symbol.decl_span, name:)
      .then { Result[nil, [it], scope] }

  else
    Result[nil, [], scope.bind(name, symbol)]
  end
end

#collect_vars(symbol, registry) ⇒ Object 



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# File 'lib/jade/frontend/semantic_analysis/helper.rb', line 63

def collect_vars(symbol, registry)
  case symbol
  in Symbol::TypeRef | Symbol::ValueRef
    registry
      .lookup(symbol)
      .then { collect_vars(it, registry) }

  in Symbol::Constructor(args:)
    args
      .flat_map { collect_vars(it, registry) }

  in Symbol::Variable
    [symbol]

  in Symbol::TypeApplication | Symbol::PartialApplication
    symbol
      .args
      .flat_map { collect_vars(it, registry) }

  in Symbol::FunctionType | Symbol::InterfaceFunction
    symbol
      .params
      .flat_map { collect_vars(it, registry) } +
        collect_vars(symbol.return_type, registry)

  in Symbol::RecordType(row_var:)
    row_var.nil? ? [] : [row_var]
  end
end

#lookup(scope, name, entry, span) ⇒ Object 



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# File 'lib/jade/frontend/semantic_analysis/helper.rb', line 21

def lookup(scope, name, entry, span)
  if (decl = scope.lookup(name))
    Result[decl, [], scope]

  else
    Error::UndefinedVariable
      .new(entry.name, span, var_ref: name)
      .then { Result[nil, [it], scope] }
  end
end

#validate_type_symbol(symbol, registry, entry) ⇒ Object 



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# File 'lib/jade/frontend/semantic_analysis/helper.rb', line 93

def validate_type_symbol(symbol, registry, entry)
  case symbol
  in Symbol::Union(variants:, type_params:)
    variants.flat_map { validate_type_symbol(it, registry, entry) } +
      type_params.flat_map { validate_type_symbol(it, registry, entry) }

  in Symbol::Constructor(args:)
    args.flat_map { validate_type_symbol(it, registry, entry) }

  in Symbol::TypeRef
    registry.lookup(symbol)
      .then { validate_type_symbol(it, registry, entry) }

  in Symbol::ValueRef
    registry.lookup(symbol)
      .then { validate_type_symbol(it, registry, entry) }

  in Symbol::Variable
    []

  in Symbol::PartialApplication(constructor:, args:)
    args.flat_map { validate_type_symbol(it, registry, entry) }

  in Symbol::TypeApplication(constructor:, args:)
    constructor_symbol = registry.lookup(constructor)

    if constructor_symbol.type_params.size != args.size
      [Error::TypeArgsMismatch.new(
          entry.name,
          symbol.span,
          type_name: constructor.name,
          expected: constructor_symbol.type_params.size,
          actual: args.size
      )]
    else
      []
    end + args.flat_map { validate_type_symbol(it, registry, entry) }

  in Symbol::FunctionType | Symbol::InterfaceFunction | Symbol::InteropFunction
    validate_type_symbol(symbol.return_type, registry, entry) +
      symbol.params.flat_map { validate_type_symbol(it, registry, entry) }

  in Symbol::Function(params:, return_type:)
    validate_type_symbol(return_type, registry, entry) +
      params.values.flat_map { validate_type_symbol(it, registry, entry) }

  in Symbol::RecordType(fields:)
    fields.reduce([]) do |acc, (k, v)|
      acc + validate_type_symbol(v, registry, entry)
    end

  in Symbol::Struct(type_params:, record_type:)
    validate_type_symbol(record_type, registry, entry) +
      type_params.flat_map { validate_type_symbol(it, registry, entry) }
  end
end