mirror of
https://github.com/polserver/polserver
synced 2026-08-13 08:23:08 -04:00
e344a8a483
Adds: - model/LocalVariableScopeInfo.h Stores, for local variable blocks: - the names of the local variables in the block - the "base index" of those local variables within the current scope The code generator uses these to clean up local variables as they go out of scope. We also need this when writing debug information.
58 lines
1.9 KiB
C++
58 lines
1.9 KiB
C++
#include "LocalVariableScope.h"
|
|
|
|
#include "compiler/Report.h"
|
|
#include "compiler/analyzer/LocalVariableScopes.h"
|
|
#include "compiler/analyzer/Variables.h"
|
|
#include "compiler/file/SourceLocation.h"
|
|
#include "compiler/model/LocalVariableScopeInfo.h"
|
|
#include "compiler/model/Variable.h"
|
|
|
|
namespace Pol::Bscript::Compiler
|
|
{
|
|
LocalVariableScope::LocalVariableScope( LocalVariableScopes& scopes,
|
|
LocalVariableScopeInfo& local_variable_scope_info )
|
|
: scopes( scopes ),
|
|
report( scopes.report ),
|
|
block_depth( scopes.local_variable_scopes.size() ),
|
|
prev_locals( scopes.local_variables.count() ),
|
|
local_variable_scope_info( local_variable_scope_info )
|
|
{
|
|
local_variable_scope_info.base_index = prev_locals;
|
|
scopes.local_variable_scopes.push_back( this );
|
|
}
|
|
|
|
LocalVariableScope::~LocalVariableScope()
|
|
{
|
|
scopes.local_variables.remove_all_but( prev_locals );
|
|
|
|
for ( auto& variable : shadowing )
|
|
{
|
|
scopes.local_variables.restore_shadowed( variable );
|
|
}
|
|
|
|
scopes.local_variable_scopes.pop_back();
|
|
}
|
|
|
|
std::shared_ptr<Variable> LocalVariableScope::create( const std::string& name, WarnOn warn_on,
|
|
const SourceLocation& source_location )
|
|
{
|
|
if ( auto existing = scopes.local_variables.find( name ) )
|
|
{
|
|
if ( existing->block_depth == block_depth )
|
|
{
|
|
report.error( source_location, "Variable '", name, "' is already in scope.\n",
|
|
" See previous definition at: ",
|
|
existing->source_location, "\n" );
|
|
return existing;
|
|
}
|
|
shadowing.push_back( existing );
|
|
}
|
|
auto local = scopes.local_variables.create( name, block_depth, warn_on,
|
|
source_location );
|
|
|
|
local_variable_scope_info.variables.push_back( local );
|
|
|
|
return local;
|
|
}
|
|
|
|
} // namespace Pol::Bscript::Compiler
|