Ed Davis
Joined 31 August 2022
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From
Lexical analysis is the process of converting a sequence of characters (such as in a
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;Specification
{| class="wikitable"▼
|-▼
! Characters !! Regular expression !! Name▼
|-▼
| integers || [0-9]+ || Integer▼
|-▼
| char literal || 'x' || Integer▼
|-▼
| identifiers || [_a-zA-Z][_a-zA-Z0-9]+ || Ident▼
|-▼
| string literal || ".*" || String▼
|}▼
Notes: For char literals, '\n' is supported as a new line▼
character. To represent \, use: '\\'. \n may also be used in▼
Strings, to print a newline. No other special sequences are▼
supported.▼
operators:
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| ',' || comma || Comma
|}
▲{| class="wikitable"
▲|-
▲! Characters !! Regular expression !! Name
▲|-
▲| integers || [0-9]+ || Integer
▲|-
▲| char literal || 'x' || Integer
▲|-
▲| identifiers || [_a-zA-Z][_a-zA-Z0-9]+ || Ident
▲|-
▲| string literal || ".*" || String
▲|}
▲Notes: For char literals, '\n' is supported as a new line
▲character. To represent \, use: '\\'. \n may also be used in
▲Strings, to print a newline. No other special sequences are
▲supported.
keywords:
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------
{| class="wikitable"
line 4 col 1 Print▼
|-
line 4 col 6 Lparen▼
! Line !! Number !! Column !! Number !! Token name !! other data
line 4 col 7 String "Hello, World!\n"▼
|-
line 4 col 24 Rparen▼
| line || 4 || col || 1 Print
| line ||
▲| line || 4 || col || 7 String || "Hello, World!\n"
|}
<lang c>
| |||