constParser -- produce a parser that accepts a fixed string, one character at a time

Synopsis

• Usage:

  constParser s

• Inputs:
  • s, a string
• Outputs:
  • a parser, a parser that accepts (and returns) the string s, one character at a time

Description

i1 : constParser "abc"

o1 = -*Function[/usr/share/Macaulay2/Parsing.m2:148:51-148:146]*-

o1 : Parser

i2 : oo "a"

o2 = -*Function[/usr/share/Macaulay2/Parsing.m2:148:51-148:146]*-

o2 : Parser

i3 : oo "a"

i4 : ooo "b"

o4 = -*Function[/usr/share/Macaulay2/Parsing.m2:148:51-148:146]*-

o4 : Parser

i5 : oo "c"

o5 = -*Function[/usr/share/Macaulay2/Parsing.m2:148:51-148:146]*-

o5 : Parser

i6 : oo null

o6 = abc

i7 : (constParser "abc" : charAnalyzer) "abc"

o7 = abc

See also

• Parser : Analyzer -- combine a parser with a lexical analyzer to make a complete system