772b2ab8ba
We had been using version 3.2 from 2009, which does not have support for t_eof(). Change-Id: Id5610a272fe2cecd586991f4c59f3ec77184164e Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/56342 Reviewed-by: Jason Lowe-Power <power.jg@gmail.com> Reviewed-by: Bobby Bruce <bbruce@ucdavis.edu> Maintainer: Jason Lowe-Power <power.jg@gmail.com> Tested-by: kokoro <noreply+kokoro@google.com>
32 lines
868 B
Python
32 lines
868 B
Python
# This file contains definitions of expression grammar
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def p_expression_binop(t):
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'''expression : expression PLUS expression
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| expression MINUS expression
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| expression TIMES expression
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| expression DIVIDE expression'''
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if t[2] == '+' : t[0] = t[1] + t[3]
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elif t[2] == '-': t[0] = t[1] - t[3]
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elif t[2] == '*': t[0] = t[1] * t[3]
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elif t[2] == '/': t[0] = t[1] / t[3]
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def p_expression_uminus(t):
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'expression : MINUS expression %prec UMINUS'
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t[0] = -t[2]
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def p_expression_group(t):
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'expression : LPAREN expression RPAREN'
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t[0] = t[2]
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def p_expression_number(t):
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'expression : NUMBER'
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t[0] = t[1]
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def p_expression_name(t):
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'expression : NAME'
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try:
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t[0] = names[t[1]]
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except LookupError:
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print("Undefined name '%s'" % t[1])
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t[0] = 0
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