Struct SymbolTable 

pub struct SymbolTable {
    pub root: Symbol,
    pub stack: Stack,
    pub symbols: SymbolMap,
    pub diag_handler: DiagHandler,
    /* private fields */
}

Symbol table holding global and local symbols.

The symbol table consists of the following members:

• One root Symbol resolved from the initial source file.
• A [SourceCache] of all loaded source files (accessible by qualified name, file path and source hash).
• A Stack of StackFrames.
• A SymbolMap of all global symbols.

All these internal structures can be accessed by several implemented traits.

Fields

root: Symbol

Symbol of the initial source file.

stack: Stack

Stack of currently opened scopes with symbols while evaluation.

symbols: SymbolMap

Global symbols (including root).

diag_handler: DiagHandler

Source file diagnostics.

Implementations

impl SymbolTable

pub fn new( root: Identifier, symbols: SymbolMap, sources: Sources, ) -> ResolveResult<Self>

Root symbol (symbol node of initially read source file) List of all global symbols. Stack of currently opened scopes with local symbols while evaluation. Source file cache containing all source files loaded in the context and their syntax trees.

pub fn lookup_global(&mut self, name: &QualifiedName) -> ResolveResult<Symbol>

Lookup a symbol from global symbols.

pub fn search_paths(&self) -> &Vec<PathBuf>

Return search paths of this symbol table.

pub fn is_code(&self) -> bool

Check if current stack frame is code

pub fn is_module(&self) -> bool

Check if current stack frame is a module

Trait Implementations

impl Default for SymbolTable

fn default() -> SymbolTable

Returns the “default value” for a type.

impl Display for SymbolTable

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl GetSourceByHash for SymbolTable

fn get_by_hash(&self, hash: u64) -> ResolveResult<Rc<SourceFile>>

Find a project file by it’s hash value.

impl Locals for SymbolTable

fn set_local_value(&mut self, id: Identifier, value: Value) -> EvalResult<()>

Set/add a named local value to current locals.

fn get_local_value(&self, id: &Identifier) -> EvalResult<Value>

Get a named local value from locals.

fn open(&mut self, frame: StackFrame)

Don’t use this function directly.

fn close(&mut self)

Close scope (stack pop).

fn fetch(&self, id: &Identifier) -> EvalResult<Symbol>

Fetch a local variable from current stack frame.

fn get_model(&self) -> EvalResult<Model>

Get a property value from current model.

fn current_name(&self) -> QualifiedName

Return qualified name of current module or workbench.

impl Lookup for SymbolTable

fn lookup(&mut self, name: &QualifiedName) -> EvalResult<Symbol>

Lookup for local or global symbol by qualified name.

impl UseSymbol for SymbolTable

fn use_symbol( &mut self, visibility: Visibility, name: &QualifiedName, id: Option<Identifier>, within: &QualifiedName, ) -> EvalResult<Symbol>

Find a symbol in the symbol table and copy it to the locals.

fn use_symbols_of( &mut self, visibility: Visibility, name: &QualifiedName, within: &QualifiedName, ) -> EvalResult<Symbol>

Find a symbol in the symbol table and copy all it’s children to the locals and the target.