In all lexical states, unescaped newlines produce the NEWLINE token and change the lexical state to be LKEYWORD.
|
Initial State: |
LKEYWORD, LNORM, LFILE, LLINE, LWORD, LSIGNAL, LBPT |
|---|---|
| Regular Expression: | [\n] |
| Lexeme: | NEWLINE |
| Change to State: | LKEYWORD |
In all lexical states except LLINE, a semicolon also changes the lexical state to be LKEYWORD.
This is because SEMICOLON is the command separator.
|
Initial State: |
LKEYWORD, LNORM, LFILE, LSIGNAL, LBPT, LWORD |
|---|---|
| Regular Expression: | ";" |
| Lexeme: | SEMICOLON |
| Change to State: | LKEYWORD |
Commands can be nested, and the following transitions support this:
|
Initial State: |
LNORM |
|---|---|
| Regular Expression: | "{" |
| Lexeme: | LBRACE |
| Change to State: | LKEYWORD |
|
Initial State: |
LKEYWORD, LNORM, LFILE, LSIGNAL, LBPT |
|---|---|
| Regular Expression: | "}" |
| Lexeme: | RBRACE |
| Change to State: | LKEYWORD |
In most lexical states, the spaces, tabs, and escaped newlines are ignored. In the LLINE state, the spaces and tabs are part of the line, but escaped newlines are still ignored. In the LWORD state, the spaces and tabs are ignored, but escaped newlines are not.
Initial State: |
LKEYWORD, LNORM, LFILE, LSIGNAL, LBPT |
|---|---|
| Regular Expression: | [ \t] \\\n |
| Lexeme: | Ignored |
| Change to State: | Unchanged |
Initial State: |
LLINE |
|---|---|
| Regular Expression: | \\\n |
| Lexeme: | Ignored |
| Change to State: | Unchanged |
Initial State: |
LWORD |
|---|---|
| Regular Expression: | [ \t] |
| Lexeme: | Ignored |
| Change to State: | Unchanged |