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This module provides classes and functions for pass management.
There are two kinds of passes: transformations and analysis.
* ModuleAnalysis, FunctionAnalysis and NodeAnalysis are to be
subclassed by any pass that collects information about the AST.
* gather is used to gather (!) the result of an analyses on an AST node.
* Backend is to be sub-classed by any pass that dumps the AST content.
* dump is used to dump (!) the AST using the given backend.
* Transformation is to be sub-classed by any pass that updates the AST.
* apply is used to apply (sic) a transformation on an AST node.
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Class that stores the hierarchy of node visited.
Contains:
* parent module
* parent function
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Class to be inherited from to add automatic update of context.
The optional analysis dependencies are listed in `dependencies'.
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Checks no analysis are called before a transformation,
as the transformation could invalidate the analysis.
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A pass that does not change its content but gathers informations about it.
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�zAnalysis.__init__c sP |t | �f}|| jjv r| jj| | _| jS tt| ��|� | j| jj|< | jS r )�typer r+ r0 r r% r2 )r r. �keyr r r r2 u s �z Analysis.runc C s t |� d S r )�print)r �datar r r �display~ s zAnalysis.displayc C s | � | �|�� d|fS )NF)rB r2 r5 r r r �apply� s zAnalysis.apply) r r r r r r2 rB rC r; r r r r r% h s r% c � e Zd ZdZ� fdd�Z� ZS )�ModuleAnalysisz,An analysis that operates on a whole module.c sD t |tj�s| jjd u rtd�t| �j���| jj}t t
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� �zFunctionAnalysis.runrI r r r r r* � s r* c @ � e Zd ZdZdS )� NodeAnalysisz&An analysis that operates on any node.N�r r r r r r r r rN � � rN c @ rM )�Backendz&A pass that produces code from an AST.NrO r r r r rQ � rP rQ c s4 e Zd ZdZ� fdd�Z� fdd�Zdd� Z� ZS )r$ z A pass that updates its content.c s t t| �j|i |�� d| _dS )z8 Initialize the update used to know if update happened. FN)r r$ r r= )r �args�kwargsr r r r � s
zTransformation.__init__c s0 t t| ��|�}| jrt�|� | jj�� |S )zA Apply transformation and dependencies and fix new node location.) r r$ r2 r= r' �fix_missing_locationsr r+ �clear)r r. �nr r r r2 � s
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Front end to the pythran pass system.
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zPassManager.__init__c C �( t |t�sJ �|� }|�| � |�|�S )z5High-level function to call an `analysis' on a `node')r) r% r r2 r7 r r r r: � s
zPassManager.gatherc C r] )zfHigh-level function to call a `backend' on a `node' to generate
code for module `module_name'.)r) rQ r r2 )r �backendr. �br r r �dump� s
zPassManager.dumpc C s, t |ttf�s J �|� }|�| � |�|�S )z�
High-level function to call a `transformation' on a `node'.
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