1 files changed, 111 insertions, 0 deletions
diff --git a/grammar/go/insert-semi.lm b/grammar/go/insert-semi.lm
new file mode 100644
index 00000000..3271216a
--- /dev/null
+++ b/grammar/go/insert-semi.lm
@@ -0,0 +1,111 @@
+lex
+	literal `var `if `then `else `while `do `for `read `write
+			`end `to `goto
+
+	literal `:= `!= `+ `- `* `/ `= `( `) `: `;
+
+	ignore /'//' [^\n]* '\n'/
+	ignore /[\n\t ]+/
+
+	token id /[a-zA-Z_]+/
+	token integer /[0-9]+/
+	token stringlit /'"' [^"]* '"'/
+
+	token insert_semi /
+		( ( id -
+			'var' - 'if' - 'then' - 'else' - 'while' -
+			'do' - 'for' - 'read' - 'write' - 'end' -
+			'to' - 'goto' ) |
+		integer | stringlit | ')' ) '\n' /
+	{
+		Prefix: str = input->pull( match_length - 1 )
+		input->push( ";" )
+		input->push( Prefix )
+	}
+
+end
+
+def program
+	[statement*]
+
+def statement
+	[declaration]
+|	[assignment_statement]
+|	[if_statement]
+|	[while_statement]
+|	[do_statement]
+|	[for_statement]
+|	[read_statement]
+|	[write_statement]
+|	[labelled_statement]
+|	[goto_statement]
+
+def declaration
+	[`var id `;]
+
+def assignment_statement
+	[id `:= expression `;]
+
+def if_statement
+	[`if expression `then statement* opt_else_statement `end]
+
+def opt_else_statement
+	[`else statement*]
+|	[]
+
+def while_statement
+	[`while expression `do statement* `end]
+
+def do_statement
+	[`do statement* `while expression `;]
+
+def for_statement
+	[`for id `:= expression `to expression `do statement* `end]
+
+def read_statement
+	[`read id `;]
+
+def write_statement
+	[`write expression `;]
+
+def expression
+	[term]
+|	[expression eqop term]
+
+def eqop [`=] | [`!=]
+
+def term
+	[factor]
+|	[term addop factor]
+
+def addop [`+] | [`-]
+
+def factor
+	[primary]
+|	[factor mulop primary]
+
+def mulop [`*] | [`/]
+
+def primary
+	[id]
+|	[lit]
+|	[`( expression `)]
+
+def lit
+	[integer]
+|	[stringlit]
+
+def labelled_statement
+	[id `: statement]
+
+def goto_statement
+	[`goto id `;]
+
+parse P: program[stdin]
+
+if P 
+	print[ P ]
+else {
+	print "[error]
+	exit( 1 )
+}