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"""Single line Fortran statements.
"""
__all__ = ['statements', 'end_stmts', 'block_stmts',
'IfThen', 'Program', 'Module', 'PythonModule',
'BlockData','Interface', 'Subroutine','Function',
'Type','Do','Select',
'EndProgram','EndModule','EndPythonModule','EndInterface',
'EndBlockData','EndSubroutine','EndFunction','EndType','EndIfThen',
'EndDo','EndSelect'
]
import re
import sys
class Statement:
def __init__(self, parent, item, name=None):
self.parent = parent
self.reader = parent.reader
self.item = item
if name is None:
name = item.label
self.name = name
# If statement instance is constructed by error, set isvalid to False
self.isvalid = True
def get_intent_tab(self,colon='',deintent=False):
from block import Block
tab = ''
p = self.parent
while isinstance(p, Block):
tab += ' '
p = p.parent
if deintent:
tab = tab[:-2]
s = self.item.label
if s:
tab = tab[len(s)+len(colon):]
if not tab: tab = ' '
tab = s + colon + tab
return tab
# End statements
class EndStatement(Statement):
"""
END [<blocktype> [<name>]]
EndStatement instances have attributes:
name
isvalid
"""
def __init__(self, parent, item):
Statement.__init__(self, parent, item)
line = item.get_line().replace(' ','')[3:]
if line.startswith(self.blocktype):
line = line[len(self.blocktype):].strip()
else:
if line:
# not the end of expected block
line = ''
self.isvalid = False
if line:
if not line==parent.name:
message = self.reader.format_message(\
'WARNING',
'expected the end of %r block but got end of %r, skipping.'\
% (parent.name, line),
item.span[0],item.span[1])
print >> sys.stderr, message
self.isvalid = False
self.name = parent.name
def __str__(self):
return self.get_intent_tab()[:-2] + 'END %s %s'\
% (self.blocktype.upper(),self.name or '')
class EndProgram(EndStatement):
"""
END [PROGRAM [name]]
"""
start_re = re.compile(r'end(\s*program\s*\w*|)\Z', re.I).match
blocktype = 'program'
class EndModule(EndStatement):
"""
END [MODULE [name]]
"""
start_re = re.compile(r'end(\s*module\s*\w*|)\Z', re.I).match
blocktype = 'module'
class EndBlockData(EndStatement):
"""
END [BLOCK DATA [name]]
"""
start_re = re.compile(r'end(\s*block\s*data\s*\w*|)\Z', re.I).match
blocktype = 'blockdata'
class EndPythonModule(EndStatement):
"""
END PYTHON MODULE name
"""
start_re = re.compile(r'end\s*python\s*module\s*\w+\Z', re.I).match
blocktype = 'pythonmodule'
class EndType(EndStatement):
"""
END TYPE [name]
"""
start_re = re.compile(r'end\s*type\s*\w*', re.I).match
blocktype = 'type'
class EndInterface(EndStatement):
"""
END INTERFACE [name]
"""
start_re = re.compile(r'end\s*interface\s*\w*', re.I).match
blocktype = 'interface'
class EndSubroutine(EndStatement):
"""
END [SUBROUTINE [name]]
"""
start_re = re.compile(r'end\s*(subroutine\s*\w*|)', re.I).match
blocktype = 'subroutine'
class EndFunction(EndStatement):
"""
END [FUNCTION [name]]
"""
start_re = re.compile(r'end\s*(function\s*\w*|)', re.I).match
blocktype = 'function'
class EndIfThen(EndStatement):
"""
END IF [name]
"""
start_re = re.compile(r'end\s*if\s*\w*', re.I).match
blocktype = 'if'
class EndSelect(EndStatement):
"""
END SELECT [name]
"""
start_re = re.compile(r'end\s*select\s*\w*', re.I).match
blocktype = 'select'
class EndDo(EndStatement):
"""
END DO [name]
"""
start_re = re.compile(r'end\s*do\s*\w*', re.I).match
blocktype = 'do'
# Begin statements
class BeginStatement(Statement):
""" <blocktype> <name>
BeginStatement instances have the following attributes:
name
isvalid
"""
def __init__(self, parent, item):
name = item.get_line().replace(' ','')[len(self.blocktype):].strip()
if not name:
name = '__'+self.blocktype.upper()+'__'
Statement.__init__(self, parent, item, name)
class Program(BeginStatement):
""" PROGRAM [name]
"""
blocktype = 'program'
start_re = re.compile(r'program\s*\w*\Z', re.I).match
class Module(BeginStatement):
"""
MODULE <name>
"""
blocktype = 'module'
start_re = re.compile(r'module\s*\w+\Z', re.I).match
def __str__(self):
s = self.get_intent_tab(deintent=True)
s += 'MODULE '+ self.name
return s
class PythonModule(BeginStatement):
"""
PYTHON MODULE <name>
"""
blocktype = 'pythonmodule'
start_re = re.compile(r'python\s*module\s*\w+\Z', re.I).match
class BlockData(BeginStatement):
"""
BLOCK DATA [name]
"""
blocktype = 'blockdata'
start_re = re.compile(r'block\s*data\s*\w*\Z', re.I).match
class Interface(BeginStatement):
"""
INTERFACE [<generic-spec>]
"""
blocktype = 'interface'
start_re = re.compile(r'interface\s*\w*\Z', re.I).match
class Subroutine(BeginStatement):
"""
[prefix] SUBROUTINE <name> [ ( [<dummy-arg-list>] ) [<proc-language-binding-spec>]]
Subroutine instance has the following attributes:
name
args
"""
blocktype = 'subroutine'
start_re = re.compile(r'[\w\s]*subroutine\s*\w+', re.I).match
begin_re = re.compile(r'(?P<prefix>[\w\s]*)\s*subroutine\s*(?P<name>\w+)', re.I).match
def __init__(self, parent, item):
BeginStatement.__init__(self, parent, item)
line = item.get_line()
m = self.begin_re(line)
self.name = m.group('name')
line = line[m.end():].strip()
args = []
if line.startswith('('):
assert line.endswith(')'),`line`
for a in line.split(','):
args.append(a.strip())
self.args = args
def __str__(self):
s = self.get_intent_tab(deintent=True)
s += 'SUBROUTINE %s (%s)' % (self.name, ', '.join(self.args))
return s
class Function(BeginStatement):
"""
"""
blocktype = 'function'
start_re = re.compile(r'([\w\s]+(\(\s*\w+\s*\)|)|)\s*function\s*\w+', re.I).match
begin_re = re.compile(r'(?P<prefix>([\w\s](\(\s*\w+\s*\)|))*)\s*function\s*(?P<name>\w+)', re.I).match
def __init__(self, parent, item):
m = self.begin_re(item.get_line())
name = m.group('name')
BeginStatement.__init__(self, parent, item, name)
class Type(BeginStatement):
"""
TYPE [[type-attr-spec-list] ::] <name> [(type-param-name-list)]
"""
blocktype = 'type'
start_re = re.compile(r'type(?!\s*\()(.*::|)\s*\w+\Z', re.I).match
begin_re = re.compile(r'type(?!\s*\()(.*::|)\s*(?P<name>\w+)\Z', re.I).match
def __init__(self, parent, item):
BeginStatement.__init__(self, parent, item)
m = self.begin_re(item.get_line())
self.name = m.group('name')
class IfThen(BeginStatement):
"""
IF ( <scalar-logical-expr> ) THEN
IfThen instance has the following attributes:
expr
"""
blocktype = 'ifthen'
start_re = re.compile(r'if\s*\(.*\)\s*then\Z', re.I).match
def __init__(self, parent, item):
Statement.__init__(self, parent, item)
line = item.get_line()[2:-4].strip()
assert line[0]=='(' and line[-1]==')',`line`
self.expr = line[1:-1].strip()
def __str__(self):
s = self.get_intent_tab(colon=':',deintent=True)
s += 'IF (%s) THEN' % (self.expr)
return s
class Do(BeginStatement):
"""
"""
blocktype = 'do'
start_re = re.compile(r'do\b\s*\d*', re.I).match
begin_re = re.compile(r'do\b\s*(?P<label>\d*)', re.I).match
def __init__(self, parent, item):
label = self.begin_re(item.get_line()).group('label').strip()
self.endlabel = label
BeginStatement.__init__(self, parent, item)
self.name = item.label
class Select(BeginStatement):
blocktype = 'select'
start_re = re.compile(r'select\s*case\s*\(', re.I).match
# Other statements
class Use(Statement):
""" Use statement class.
use [ [, <module-nature>] ::] <name> [, <rename-list> ]
use [ [, <module-nature>] ::] <name> ONLY : [ <only-list> ]
Use instance has attributes:
isuseonly - boolean
modulename - name
modulenature - list of names
use_list - list of 3-tuples (<name|operator>, <local>, <use>)
"""
start_re = re.compile(r'use\b').match
stmt_re = re.compile(r'use\b((?P<modulenature>[\w,\s]*)\s*::|)\s*(?P<name>\w+)',re.I).match
only_re = re.compile(r'only\s*:',re.I).match
op_rename_re = re.compile(r'operator\s*\(\s*(?P<localop>[^)]+)\s*\)\s*=\s*\>'\
r'\s*operator\s*\(\s*(?P<useop>[^)]+)\s*\)', re.I).match
rename_re = re.compile(r'(?P<localname>\w+)\s*=\s*\>\s*(?P<usename>\w+)',re.I).match
def __init__(self, parent, item):
Statement.__init__(self, parent, item)
self.isuseonly = False
line = item.get_line()
m = self.stmt_re(line)
self.modulename = m.group('name')
# init modulenature
self.modulenature = []
mn = m.group('modulenature') or ''
for n in mn.split(','):
n = n.strip()
if not n: continue
self.modulenature.append(n)
# process the rest of the line
self.use_list = []
rest = line[m.end():].strip()
only_m = self.only_re(rest)
if only_m:
self.isuseonly = True
rest = rest[only_m.end():].strip()
for n in rest.split(','):
n = n.strip()
if not n: continue
m1 = self.op_rename_re(n)
if m1:
localop, useop = m1.group('localop'),m1.group('useop')
self.use_list.append(('operator',localop,useop))
continue
m1 = self.rename_re(n)
if m1:
localname, usename = m1.group('localname'),m1.group('usename')
self.use_list.append(('name',localname,usename))
continue
self.use_list.append(('name',n,n))
def __str__(self):
s = self.get_intent_tab()
l = ['USE'] + self.modulenature
s += ', '.join(l) + ' :: ' + self.modulename
l = []
for type,local,use in self.use_list:
if type=='name':
if local==name: l.append(local)
else: l.append('%s => %s' % (local, use))
else:
assert type=='operator',`type`
l.append('OPERATOR(%s) => OPERATOR(%s)' % (local, use))
if self.isuseonly:
s += ', ONLY: ' + ', '.join(l)
else:
if l: s+= ', ' + ', '.join(l)
return s
class Import(Statement):
"""Import statement class
import [[::] <import-name-list>]
Import instance has attributes:
import_list - list of names
"""
start_re = re.compile(r'import\b').match
def __init__(self, parent, item):
Statement.__init__(self, parent, item)
line = item.get_line()[6:].lstrip()
if line.startswith('::'): line = line[2:]
self.import_list = []
for n in line.split(','):
n = n.strip()
if not n: continue
self.import_list.append(n)
def __str__(self):
s = self.get_intent_tab() + 'IMPORT'
if self.import_list:
s += ' :: ' + ','.join(self.import_list)
return s
class Assignment(Statement):
"""Assignment statement class
<variable> = <expr>
<pointer variable> => <expr>
Assignment instance has attributes:
variable
sign
expr
"""
start_re = re.compile(r'\w[\w%]*(\s*\(\s*[^)]*\)|)\s*=\>?',re.I).match
stmt_re = re.compile(r'(?P<variable>\w[\w%]*(\s*\(\s*[^)]*\)|))\s*(?P<sign>=\>?)\s*(?P<expr>.*)\Z',re.I).match
def __init__(self, parent, item):
Statement.__init__(self, parent, item)
line = item.get_line()
m = self.stmt_re(line)
self.variable = m.group('variable')
self.sign = m.group('sign')
self.expr = m.group('expr')
def __str__(self):
return self.get_intent_tab() + '%s %s %s' \
% (self.variable, self.sign, self.expr)
class If(Statement):
"""If statement class
IF (<scalar-logical-expr>) <action-stmt>
If instance has attributes:
expr
stmt
"""
start_re = re.compile(r'if\b',re.I).match
def __init__(self, parent, item):
Statement.__init__(self, parent, item)
line = item.get_line()[2:].strip()
i = line.find(')')
self.expr = line[1:i].strip()
self.stmt = line[i+1:].strip()
def __str__(self):
return self.get_intent_tab()+ 'IF (%s) %s' % (self.expr, self.stmt)
class Call(Statement):
"""Call statement class
CALL <proc-designator> [([arg-spec-list])]
Call instance has attributes:
designator
arg_list
"""
start_re = re.compile(r'call\b', re.I).match
def __init__(self, parent, item):
Statement.__init__(self, parent, item)
line = item.get_line()[4:].strip()
i = line.find('(')
self.arg_list = []
if i==-1:
self.designator = line.strip()
else:
self.designator = line[:i].strip()
for n in line[i+1:-1].split(','):
n = n.strip()
if not n: continue
self.arg_list.append(n)
def __str__(self):
s = self.get_intent_tab() + 'CALL '+str(self.designator)
if self.arg_list:
s += '('+', '.join(map(str,self.arg_list))+ ')'
return s
class Contains(Statement):
"""
CONTAINS
"""
start_re = re.compile(r'contains\Z',re.I).match
def __str__(self): return self.get_intent_tab() + 'CONTAINS'
class Continue(Statement):
"""
CONTINUE
"""
start_re = re.compile(r'continue\Z',re.I).match
def __str__(self): return self.get_intent_tab() + 'CONTINUE'
class Return(Statement):
"""
RETURN [<int-expr>]
Return instance has attributes:
expr
"""
start_re = re.compile(r'return\b',re.I).match
def __init__(self, parent, item):
Statement.__init__(self, parent, item)
line = item.get_line()[6:].strip()
self.expr = ''
if line:
self.expr = line
def __str__(self):
s = self.get_intent_tab() + 'RETURN'
if self.expr:
s += ' ' + str(self.expr)
return s
class Stop(Statement):
"""
STOP [<stop-code>]
Return instance has attributes:
code
"""
start_re = re.compile(r'stop\b',re.I).match
def __init__(self, parent, item):
Statement.__init__(self, parent, item)
line = item.get_line()[4:].strip()
self.code = ''
if line:
self.code = line
def __str__(self):
s = self.get_intent_tab() + 'STOP'
if self.code:
s += ' ' + str(self.code)
return s
class Format(Statement):
"""
FORMAT ( [<format-item-list>] )
Return instance has attributes:
spec
"""
start_re = re.compile(r'format\s*\([^)]*\)\Z',re.I).match
def __init__(self, parent, item):
Statement.__init__(self, parent, item)
line = item.get_line()[6:].strip()
assert line[0]=='(' and line[-1]==')',`line`
self.spec = line[1:-1].strip()
def __str__(self):
return self.get_intent_tab() + 'FORMAT (%s)' % (self.spec)
end_stmts = {'ModuleBlock':EndModule, 'PythonModuleBlock':EndPythonModule,
'TypeBlock':EndType,
'SubroutineBlock':EndSubroutine,'FunctionBlock':EndFunction,
'IfThenBlock':EndIfThen,'DoBlock':EndDo,'InterfaceBlock':EndInterface,
'SelectBlock':EndSelect}
block_stmts = {'IfThenBlock':IfThen}
exec_stmts = [Assignment, If, Call, Stop, Continue]
statements = {}
statements['Block'] = []
statements['ProgramBlock'] = [Use, Contains] + exec_stmts
# Format, misc_decl, Data, derived_type_defs, Interface_block, exec_stmt, Contains, StmtFunc_stmt
statements['ModuleBlock'] = [Use, Contains]
statements['BlockDataBlock'] = [Use]
statements['SubroutineBlock'] = [Use, Contains, Return, Format] + exec_stmts
statements['FunctionBlock'] = statements['SubroutineBlock']
statements['InterfaceBlock'] = [Use, Import]
statements['PythonModuleBlock'] = [Use]
statements['TypeBlock'] = [Contains]
for n in ['IfThenBlock','DoBlock','SelectBlock']:
statements[n] = exec_stmts
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