mirror of
https://github.com/irmen/prog8.git
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759 lines
17 KiB
Python
759 lines
17 KiB
Python
"""
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Programming Language for 6502/6510 microprocessors
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This is the parser of the IL65 code, that generates a parse tree.
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Written by Irmen de Jong (irmen@razorvine.net)
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License: GNU GPL 3.0, see LICENSE
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"""
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from typing import List, Any
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from ply.yacc import yacc
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from .symbols import SourceRef, AstNode
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from .lexer import tokens, lexer, find_tok_column # get the lexer tokens. required.
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start = "start"
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class Module(AstNode):
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def __init__(self, nodes: List[AstNode], sourceref: SourceRef) -> None:
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super().__init__(sourceref)
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self.nodes = nodes or []
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class Directive(AstNode):
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def __init__(self, name: str, args, sourceref: SourceRef) -> None:
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super().__init__(sourceref)
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self.name = name
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self.args = args or []
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class Block(AstNode):
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def __init__(self, name: str, address, scope, sourceref: SourceRef) -> None:
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super().__init__(sourceref)
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self.name = name
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self.address = address
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self.scope = scope
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class Scope(AstNode):
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def __init__(self, nodes: List[AstNode], sourceref: SourceRef) -> None:
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super().__init__(sourceref)
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self.nodes = nodes
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class Label(AstNode):
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def __init__(self, name: str, sourceref: SourceRef) -> None:
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super().__init__(sourceref)
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self.name = name
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class Register(AstNode):
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def __init__(self, name: str, sourceref: SourceRef) -> None:
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super().__init__(sourceref)
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self.name = name
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class PreserveRegs(AstNode):
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def __init__(self, registers, sourceref: SourceRef) -> None:
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super().__init__(sourceref)
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self.registers = registers
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class Assignment(AstNode):
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def __init__(self, lhs, rhs, sourceref: SourceRef) -> None:
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super().__init__(sourceref)
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self.lhs = lhs
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self.rhs = rhs
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class AugAssignment(Assignment):
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def __init__(self, lhs, operator: str, rhs, sourceref: SourceRef) -> None:
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super().__init__(lhs, rhs, sourceref)
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self.operator = operator
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class SubCall(AstNode):
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def __init__(self, target, preserveregs, arguments, sourceref: SourceRef) -> None:
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super().__init__(sourceref)
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self.target = target
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self.preserveregs = preserveregs
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self.arguments = arguments
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class Return(AstNode):
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def __init__(self, valueA, valueX, valueY, sourceref: SourceRef) -> None:
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super().__init__(sourceref)
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self.valueA = valueA
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self.valueX = valueX
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self.valueY = valueY
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class TargetRegisters(AstNode):
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def __init__(self, registers, sourceref: SourceRef) -> None:
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super().__init__(sourceref)
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self.registers = registers
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class InlineAssembly(AstNode):
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def __init__(self, assembly: str, sourceref: SourceRef) -> None:
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super().__init__(sourceref)
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self.assembly = assembly
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class VarDef(AstNode):
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def __init__(self, name: str, vartype, datatype, value, sourceref: SourceRef) -> None:
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super().__init__(sourceref)
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self.name = name
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self.vartype = vartype
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self.datatype = datatype
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self.value = value
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class Datatype(AstNode):
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def __init__(self, name: str, dimension, sourceref: SourceRef) -> None:
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super().__init__(sourceref)
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self.name = name
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self.dimension = dimension
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class Subroutine(AstNode):
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def __init__(self, name: str, paramspec, resultspec, code, sourceref: SourceRef) -> None:
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super().__init__(sourceref)
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self.name = name
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self.paramspec = paramspec
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self.resultspec = resultspec
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self.code = code
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class Goto(AstNode):
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def __init__(self, target, ifstmt, condition, sourceref: SourceRef) -> None:
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super().__init__(sourceref)
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self.target = target
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self.ifstmt = ifstmt
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self.condition = condition
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class Dereference(AstNode):
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def __init__(self, location, datatype, sourceref: SourceRef) -> None:
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super().__init__(sourceref)
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self.location = location
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self.datatype = datatype
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class CallTarget(AstNode):
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def __init__(self, target, address_of: bool, sourceref: SourceRef) -> None:
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super().__init__(sourceref)
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self.target = target
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self.address_of = address_of
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class CallArgument(AstNode):
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def __init__(self, name: str, value, sourceref: SourceRef) -> None:
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super().__init__(sourceref)
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self.name = name
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self.value = value
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class UnaryOp(AstNode):
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def __init__(self, operator, operand, sourceref: SourceRef) -> None:
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super().__init__(sourceref)
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self.operator = operator
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self.operand = operand
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class Expression(AstNode):
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def __init__(self, lhs, operator, rhs, sourceref: SourceRef) -> None:
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super().__init__(sourceref)
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self.lhs = lhs
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self.operator = operator
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self.rhs = rhs
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def p_start(p):
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"""
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start : empty
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| module_elements
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"""
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if p[1]:
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p[0] = Module(p[1], _token_sref(p, 1))
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def p_module(p):
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"""
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module_elements : module_elt
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| module_elements module_elt
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"""
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if len(p) == 2:
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p[0] = [p[1]]
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else:
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p[0] = p[1] + [p[2]]
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def p_module_elt(p):
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"""
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module_elt : ENDL
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| directive
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| block
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"""
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p[0] = p[1]
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def p_directive(p):
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"""
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directive : DIRECTIVE ENDL
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| DIRECTIVE directive_args ENDL
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"""
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if len(p) == 2:
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p[0] = Directive(p[1], None, _token_sref(p, 1))
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else:
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p[0] = Directive(p[1], p[2], _token_sref(p, 1))
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def p_directive_args(p):
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"""
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directive_args : directive_arg
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| directive_args ',' directive_arg
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"""
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if len(p) == 2:
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p[0] = [p[1]]
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else:
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p[0] = p[1] + [p[3]]
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def p_directive_arg(p):
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"""
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directive_arg : NAME
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| INTEGER
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| STRING
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"""
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p[0] = p[1]
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def p_block_name_addr(p):
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"""
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block : BITINVERT NAME INTEGER endl_opt scope
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"""
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p[0] = Block(p[2], p[3], p[5], _token_sref(p, 1))
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def p_block_name(p):
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"""
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block : BITINVERT NAME endl_opt scope
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"""
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p[0] = Block(p[2], None, p[4], _token_sref(p, 1))
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def p_block(p):
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"""
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block : BITINVERT endl_opt scope
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"""
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p[0] = Block(None, None, p[3], _token_sref(p, 1))
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def p_endl_opt(p):
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"""
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endl_opt : empty
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| ENDL
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"""
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pass
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def p_scope(p):
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"""
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scope : '{' scope_elements_opt '}'
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"""
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p[0] = Scope(p[2], _token_sref(p, 1))
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def p_scope_elements_opt(p):
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"""
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scope_elements_opt : empty
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| scope_elements
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"""
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p[0] = p[1]
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def p_scope_elements(p):
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"""
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scope_elements : scope_element
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| scope_elements scope_element
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"""
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if len(p) == 2:
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p[0] = [p[1]]
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else:
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p[0] = p[1] + [p[2]]
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def p_scope_element(p):
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"""
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scope_element : ENDL
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| label
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| directive
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| vardef
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| subroutine
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| inlineasm
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| statement
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"""
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p[0] = p[1]
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def p_label(p):
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"""
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label : LABEL
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"""
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p[0] = Label(p[1], _token_sref(p, 1))
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def p_inlineasm(p):
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"""
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inlineasm : INLINEASM ENDL
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"""
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p[0] = InlineAssembly(p[1], _token_sref(p, 1))
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def p_vardef(p):
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"""
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vardef : VARTYPE type_opt NAME ENDL
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"""
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p[0] = VarDef(p[3], p[1], p[2], None, _token_sref(p, 1))
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def p_vardef_value(p):
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"""
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vardef : VARTYPE type_opt NAME IS expression
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"""
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p[0] = VarDef(p[3], p[1], p[2], p[5], _token_sref(p, 1))
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def p_type_opt(p):
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"""
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type_opt : DATATYPE '(' dimensions ')'
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| DATATYPE
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| empty
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"""
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if len(p) == 5:
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p[0] = Datatype(p[1], p[3], _token_sref(p, 1))
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elif len(p) == 2:
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p[0] = Datatype(p[1], None, _token_sref(p, 1))
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def p_dimensions(p):
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"""
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dimensions : INTEGER
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| dimensions ',' INTEGER
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"""
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if len(p) == 2:
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p[0] = [p[1]]
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else:
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p[0] = p[1] + [p[3]]
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def p_literal_value(p):
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"""literal_value : INTEGER
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| FLOATINGPOINT
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| STRING
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| CHARACTER
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| BOOLEAN"""
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p[0] = p[1]
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def p_subroutine(p):
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"""
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subroutine : SUB NAME '(' sub_param_spec ')' RARROW '(' sub_result_spec ')' subroutine_body ENDL
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"""
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p[0] = Subroutine(p[1], p[3], p[7], p[9], _token_sref(p, 1))
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def p_sub_param_spec(p):
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"""
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sub_param_spec : empty
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| sub_param_list
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"""
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p[0] = p[1]
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def p_sub_param_list(p):
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"""
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sub_param_list : sub_param
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| sub_param_list ',' sub_param
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"""
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if len(p) == 2:
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p[0] = [p[1]]
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else:
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p[0] = p[1] + [p[3]]
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def p_sub_param(p):
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"""
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sub_param : LABEL REGISTER
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| REGISTER
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"""
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if len(p) == 3:
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p[0] = (p[1], p[2])
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elif len(p) == 2:
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p[0] = (None, p[1])
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def p_sub_result_spec(p):
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"""
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sub_result_spec : empty
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| '?'
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| sub_result_list
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"""
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if p[1] == '?':
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p[0] = ['A', 'X', 'Y'] # '?' means: all registers clobbered
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else:
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p[0] = p[1]
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def p_sub_result_list(p):
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"""
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sub_result_list : sub_result_reg
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| sub_result_list ',' sub_result_reg
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"""
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if len(p) == 2:
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p[0] = [p[1]]
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else:
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p[0] = p[1] + [p[3]]
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def p_sub_result_reg(p):
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"""
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sub_result_reg : REGISTER
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| CLOBBEREDREGISTER
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"""
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p[0] = p[1]
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def p_subroutine_body(p):
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"""
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subroutine_body : scope
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| IS INTEGER
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"""
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if len(p) == 2:
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p[0] = p[1]
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else:
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p[0] = p[2]
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def p_statement(p):
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"""
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statement : assignment ENDL
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| aug_assignment ENDL
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| subroutine_call ENDL
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| goto ENDL
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| conditional_goto ENDL
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| incrdecr ENDL
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| return ENDL
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"""
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p[0] = p[1]
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def p_incrdecr(p):
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"""
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incrdecr : assignment_target INCR
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| assignment_target DECR
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"""
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p[0] = UnaryOp(p[2], p[1], _token_sref(p, 1))
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def p_call_subroutine(p):
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"""
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subroutine_call : calltarget preserveregs_opt '(' call_arguments_opt ')'
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"""
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p[0] = SubCall(p[1], p[2], p[4], _token_sref(p, 1))
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def p_preserveregs_opt(p):
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"""
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preserveregs_opt : empty
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| preserveregs
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"""
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p[0] = p[1]
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def p_preserveregs(p):
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"""
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preserveregs : PRESERVEREGS
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"""
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p[0] = PreserveRegs(p[1], _token_sref(p, 1))
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def p_call_arguments_opt(p):
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"""
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call_arguments_opt : empty
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| call_arguments
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"""
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p[0] = p[1]
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def p_call_arguments(p):
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"""
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call_arguments : call_argument
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| call_arguments ',' call_argument
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"""
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if len(p) == 2:
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p[0] = [p[1]]
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else:
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p[0] = p[1] + [p[3]]
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def p_call_argument(p):
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"""
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call_argument : expression
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| register IS expression
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| NAME IS expression
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"""
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if len(p) == 2:
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p[0] = CallArgument(None, p[1], _token_sref(p, 1))
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elif len(p) == 4:
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p[0] = CallArgument(p[1], p[3], _token_sref(p, 1))
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def p_return(p):
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"""
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return : RETURN
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| RETURN expression
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| RETURN expression ',' expression
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| RETURN expression ',' expression ',' expression
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"""
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if len(p) == 2:
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p[0] = Return(None, None, None, _token_sref(p, 1))
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elif len(p) == 3:
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p[0] = Return(p[2], None, None, _token_sref(p, 1))
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elif len(p) == 5:
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p[0] = Return(p[2], p[4], None, _token_sref(p, 1))
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elif len(p) == 7:
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p[0] = Return(p[2], p[4], p[6], _token_sref(p, 1))
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def p_register(p):
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"""
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register : REGISTER
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"""
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p[0] = Register(p[1], _token_sref(p, 1))
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def p_goto(p):
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"""
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goto : GOTO calltarget
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"""
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p[0] = Goto(p[2], None, None, _token_sref(p, 1))
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def p_conditional_goto_plain(p):
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"""
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conditional_goto : IF GOTO calltarget
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"""
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p[0] = Goto(p[3], p[1], None, _token_sref(p, 1))
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def p_conditional_goto_expr(p):
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"""
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conditional_goto : IF expression GOTO calltarget
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"""
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p[0] = Goto(p[4], p[1], p[2], _token_sref(p, 1))
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def p_calltarget(p):
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"""
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calltarget : symbolname
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| INTEGER
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| BITAND symbolname
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| dereference
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"""
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if len(p) == 2:
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p[0] = CallTarget(p[1], False, _token_sref(p, 1))
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elif len(p) == 3:
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p[0] = CallTarget(p[2], True, _token_sref(p, 1))
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def p_dereference(p):
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"""
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dereference : '[' dereference_operand ']'
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"""
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p[0] = Dereference(p[2][0], p[2][1], _token_sref(p, 1))
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def p_dereference_operand(p):
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"""
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dereference_operand : symbolname type_opt
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| REGISTER type_opt
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| INTEGER type_opt
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"""
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p[0] = (p[1], p[2])
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def p_symbolname(p):
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"""
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symbolname : NAME
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| DOTTEDNAME
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"""
|
|
p[0] = p[1]
|
|
|
|
|
|
def p_assignment(p):
|
|
"""
|
|
assignment : assignment_target IS expression
|
|
| assignment_target IS assignment
|
|
"""
|
|
p[0] = Assignment(p[1], p[3], _token_sref(p, 1))
|
|
|
|
|
|
def p_aug_assignment(p):
|
|
"""
|
|
aug_assignment : assignment_target AUGASSIGN expression
|
|
"""
|
|
p[0] = AugAssignment(p[1], p[2], p[3], _token_sref(p, 1))
|
|
|
|
|
|
precedence = (
|
|
('left', '+', '-'),
|
|
('left', '*', '/'),
|
|
('right', 'UNARY_MINUS', 'BITINVERT', "UNARY_ADDRESSOF"),
|
|
('left', "LT", "GT", "LE", "GE", "EQUALS", "NOTEQUALS"),
|
|
('nonassoc', "COMMENT"),
|
|
)
|
|
|
|
|
|
def p_expression(p):
|
|
"""
|
|
expression : expression '+' expression
|
|
| expression '-' expression
|
|
| expression '*' expression
|
|
| expression '/' expression
|
|
| expression LT expression
|
|
| expression GT expression
|
|
| expression LE expression
|
|
| expression GE expression
|
|
| expression EQUALS expression
|
|
| expression NOTEQUALS expression
|
|
"""
|
|
p[0] = Expression(p[1], p[2], p[3], _token_sref(p, 1))
|
|
|
|
|
|
def p_expression_uminus(p):
|
|
"""
|
|
expression : '-' expression %prec UNARY_MINUS
|
|
"""
|
|
p[0] = UnaryOp(p[1], p[2], _token_sref(p, 1))
|
|
|
|
|
|
def p_expression_addressof(p):
|
|
"""
|
|
expression : BITAND symbolname %prec UNARY_ADDRESSOF
|
|
"""
|
|
p[0] = UnaryOp(p[1], p[2], _token_sref(p, 1))
|
|
|
|
|
|
def p_unary_expression_bitinvert(p):
|
|
"""
|
|
expression : BITINVERT expression
|
|
"""
|
|
p[0] = UnaryOp(p[1], p[2], _token_sref(p, 1))
|
|
|
|
|
|
def p_expression_group(p):
|
|
"""
|
|
expression : '(' expression ')'
|
|
"""
|
|
p[0] = p[2]
|
|
|
|
|
|
def p_expression_ass_rhs(p):
|
|
"""expression : expression_value"""
|
|
p[0] = p[1]
|
|
|
|
|
|
def p_expression_value(p):
|
|
"""
|
|
expression_value : literal_value
|
|
| symbolname
|
|
| register
|
|
| subroutine_call
|
|
| dereference
|
|
"""
|
|
p[0] = p[1]
|
|
|
|
|
|
def p_assignment_target(p):
|
|
"""
|
|
assignment_target : target_registers
|
|
| symbolname
|
|
| dereference
|
|
"""
|
|
p[0] = p[1]
|
|
|
|
|
|
def p_target_registers(p):
|
|
"""
|
|
target_registers : register
|
|
| target_registers ',' register
|
|
"""
|
|
if len(p) == 2:
|
|
p[0] = TargetRegisters([p[1]], _token_sref(p, 1))
|
|
else:
|
|
p[1].add_register(p[3])
|
|
p[0] = p[1]
|
|
|
|
|
|
|
|
def p_empty(p):
|
|
"""empty :"""
|
|
pass
|
|
|
|
|
|
def p_error(p):
|
|
if p:
|
|
sref = SourceRef(p.lexer.source_filename, p.lineno, find_tok_column(p))
|
|
p.lexer.error_function("{}: before '{:.20s}' ({})", sref, str(p.value), repr(p))
|
|
else:
|
|
lexer.error_function("{}: at end of input", "@todo-filename3")
|
|
|
|
|
|
def _token_sref(p, token_idx):
|
|
""" Returns the coordinates for the YaccProduction object 'p' indexed
|
|
with 'token_idx'. The coordinate includes the 'lineno' and
|
|
'column'. Both follow the lex semantic, starting from 1.
|
|
"""
|
|
last_cr = p.lexer.lexdata.rfind('\n', 0, p.lexpos(token_idx))
|
|
if last_cr < 0:
|
|
last_cr = -1
|
|
column = (p.lexpos(token_idx) - last_cr)
|
|
return SourceRef(p.lexer.source_filename, p.lineno(token_idx), column)
|
|
|
|
|
|
class TokenFilter:
|
|
def __init__(self, lexer):
|
|
self.lexer = lexer
|
|
self.prev_was_EOL = False
|
|
assert "ENDL" in tokens
|
|
|
|
def token(self):
|
|
# make sure we only ever emit ONE "ENDL" token in sequence
|
|
if self.prev_was_EOL:
|
|
# skip all EOLS that might follow
|
|
while True:
|
|
tok = self.lexer.token()
|
|
if not tok or tok.type != "ENDL":
|
|
break
|
|
self.prev_was_EOL = False
|
|
else:
|
|
tok = self.lexer.token()
|
|
self.prev_was_EOL = tok and tok.type == "ENDL"
|
|
return tok
|
|
|
|
|
|
parser = yacc(write_tables=True)
|
|
|
|
|
|
if __name__ == "__main__":
|
|
import sys
|
|
file = sys.stdin # open(sys.argv[1], "rU")
|
|
lexer.source_filename = "derp"
|
|
tokenfilter = TokenFilter(lexer)
|
|
result = parser.parse(input=file.read(),
|
|
tokenfunc=tokenfilter.token) or Module(None, SourceRef(lexer.source_filename, 1, 1))
|
|
# print("RESULT:")
|
|
# print(str(result))
|