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dmd.escape

Compiler implementation of the D programming language.
Authors:

Source escape.d

bool checkArrayLiteralEscape(Scope* sc, ArrayLiteralExp ae, bool gag);
Array literal is going to be allocated on the GC heap. Check its elements to see if any would escape by going on the heap.
Parameters:
Scope* sc used to determine current function and module
ArrayLiteralExp ae array literal expression
bool gag do not print error messages
Returns:
true if any elements escaped
bool checkAssocArrayLiteralEscape(Scope* sc, AssocArrayLiteralExp ae, bool gag);
Associative array literal is going to be allocated on the GC heap. Check its elements to see if any would escape by going on the heap.
Parameters:
Scope* sc used to determine current function and module
AssocArrayLiteralExp ae associative array literal expression
bool gag do not print error messages
Returns:
true if any elements escaped
bool checkParamArgumentEscape(Scope* sc, FuncDeclaration fdc, Identifier par, Expression arg, bool gag);
Function parameter par is being initialized to arg, and par may escape. Detect if scoped values can escape this way. Print error messages when these are detected.
Parameters:
Scope* sc used to determine current function and module
FuncDeclaration fdc function being called, null if called indirectly
Identifier par identifier of function parameter
Expression arg initializer for param
bool gag do not print error messages
Returns:
true if pointers to the stack can escape via assignment
bool checkAssignEscape(Scope* sc, Expression e, bool gag);
Given an AssignExp, determine if the lvalue will cause the contents of the rvalue to escape. Print error messages when these are detected. Infer 'scope' for the lvalue where possible, in order to eliminate the error.
Parameters:
Scope* sc used to determine current function and module
Expression e AssignExp or CatAssignExp to check for any pointers to the stack
bool gag do not print error messages
Returns:
true if pointers to the stack can escape via assignment
bool checkThrowEscape(Scope* sc, Expression e, bool gag);
Detect cases where pointers to the stack can 'escape' the lifetime of the stack frame when throwing e. Print error messages when these are detected.
Parameters:
Scope* sc used to determine current function and module
Expression e expression to check for any pointers to the stack
bool gag do not print error messages
Returns:
true if pointers to the stack can escape
bool checkNewEscape(Scope* sc, Expression e, bool gag);
Detect cases where pointers to the stack can 'escape' the lifetime of the stack frame by being placed into a GC allocated object. Print error messages when these are detected.
Parameters:
Scope* sc used to determine current function and module
Expression e expression to check for any pointers to the stack
bool gag do not print error messages
Returns:
true if pointers to the stack can escape
bool checkReturnEscape(Scope* sc, Expression e, bool gag);
Detect cases where pointers to the stack can 'escape' the lifetime of the stack frame by returning 'e' by value. Print error messages when these are detected.
Parameters:
Scope* sc used to determine current function and module
Expression e expression to check for any pointers to the stack
bool gag do not print error messages
Returns:
true if pointers to the stack can escape
bool checkReturnEscapeRef(Scope* sc, Expression e, bool gag);
Detect cases where returning 'e' by ref can result in a reference to the stack being returned. Print error messages when these are detected.
Parameters:
Scope* sc used to determine current function and module
Expression e expression to check
bool gag do not print error messages
Returns:
true if references to the stack can escape
void findAllOuterAccessedVariables(FuncDeclaration fd, VarDeclarations* vars);
Find all variables accessed by this delegate that are in functions enclosing it.
Parameters:
FuncDeclaration fd function
VarDeclarations* vars array to append found variables to
void notMaybeScope(VarDeclaration v);
Turn off STC.maybescope for variable v. This exists in order to find where STC.maybescope is getting turned off.
Parameters:
VarDeclaration v variable
void eliminateMaybeScopes(VarDeclaration[] array);
Have some variables that are maybescopes that were assigned values from other maybescope variables. Now that semantic analysis of the function is complete, we can finalize this by turning off maybescope for array elements that cannot be scope.
va v => va v maybe maybe => scope scope scope scope => scope scope scope maybe => scope scope maybe scope => scope scope - - => - - - maybe => - - - scope => error maybe - => scope - scope - => scope -
Parameters:
VarDeclaration[] array array of variables that were assigned to from maybescope variables