CPSC 3520 - DAY 5
JANUARY 25, 2018

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minic (version 1)

Lexical Part (user identifiers and numerals) of the syntax

<identifier> ::= <letter> | <identifier> <letter> | <identifier> <digit>
<letter> ::= a | b | c | d | ... | z
<numeral> ::= <digit> | <digit> <numeral>
<digit> ::= 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9

minic (version 1) Sample Program

int main (void)
{
	int t1;
	t1 = 10;
	return (t1);
}

	<identifier>
	/	   \
<indentifier>	<digit>
	|	   |
    <letter>	   1
	|
	1


We divide the overall syntax or the syntactic specification of a language
into two parts:

	-The lexical structure, which indicates the constraints on the 
	tokens, or lexical units, which define the basic 'words' or 
	(multi-symbol) terminals of the language.  This includes reserved
	words and symbols (e.g. void, while, if, {, }, ;, etc) as well as 
	user-defined words such as function and variable names.

	-The remaining syntactic structure, which is then input to the 
	grammatical recognizer, or parser.

swipl - SWI-Prolog